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Newfoundland Travels-Labrador

On Wednesday, August 27, 2003 we have a beautiful day for traveling in Labrador. We are traveling on the Trans Labrador Highway. Our first stop was L’Anse Amour, the site of a grave 7,500 years old. This was found by a group of students who thought that the rock pattern was quite unusual. Under the rock they found an enshrouded child of about twelve, face-down, painted in red with a flat rock on the lower back. Artifacts associated with the burial include a walrus tusk, a number of stone and bone projectile points, a bird bone whistle, paint grinding tools, an antler pendant, a toggling harpoon and a decorated ivory eagle.

Down the road is the Amour Lighthouse, the tallest one in Newfoundland Province. Even its presence has not stopped ships from the treacherous shores. In 1922, the HMS Raleigh, a 12,000 Ton cruiser, avoiding an iceberg, ran aground. Its wreckage is strewn on the shore. During WWII two ships collided in the dense fog in the straits, because there was a warning of a U-boat in the area. Ironically two other ships were lost in the straits that day too, but in a different area. The Strait of Belle Isle is not only an iceberg alley, but also a shipwreck alley.

Up the road at Red Bay archeologists are still uncovering the first industrial whaling factory in the world. Founded in the 1540s by the Basque fishermen, from the area between France and Spain, the whale oil was used to light up Europe. During its peak, over 2,500 whalers in Labrador, produced approximately 20,000 barrels of oil annually. Using chalupas, a boat not a sandwich, they harpooned the right whales and brought them ashore for processing. In the harbor on Saddle Island archeological digs are still in process. Many artifacts are on display in the local museum, including pieces of the wreckage of The San Juan, a whaling ship, found near the modern wreckage of the Bernier, caught in the same type of storms associated with the Labrador Coast. Many sites exist on the mainland, but have not been explored, because they are on private property. The Basque industry died around 1600, due to their involvement with the Spanish Armada.

At Red Bay, the paved road ends. A new gravel road leads to Cartwright, opening the coastal towns for tourism and commercial development. After traveling 40 or so km on the road, we parked for the night at one of the numerous gravel pits used for the construction of the roadbed.

Today we spent six hours driving the gravel road from Red Bay to Cartwright, a distance of 312 kilometers or 187 miles. The road is approximately ten yards wide and is very will groomed. The speed limit is 70 kph or 42 mph. All along the road are sweeping vistas of pine forest and mountains, something akin to driving the Northern Passage through the Adirondacks. Approximately 80 kilometers from Cartwright is the junction for the planned road to Goose Bay of an additional 250 kilometers.

Most of the towns along the route are bypassed by the new road. There are few services on the highway itself. In Lodge Bay, gas and sundry items are available at Mona’s One Stop; no diesel. Diesel is available at Mary’s Harbour at C & J’s Automotive. St. Mary’s is the embarkation point for Battle Harbour Island and National Historic District. Known as the “unofficial” capital of Labrador, Battle Harbour was a major base for salt cod fishing in Labrador during the 19th Century. The area looks pretty much like it did in 1909. The fishery continued until the 1990s and then was donated to the people. Until the advent of the highway this year the island was pretty inaccessible, except by boat.  Today interpreters in traditional dress guide the tourist through a typical fishing village of the 19th and 20th centuries. Accommodations are available for overnight stays.

50 k. from Mary’s Harbour is Port Hope Simpson on the beautiful Alexis River. Restaurants, sleeping accommodations, fuel and a hospital are available there. This is the last vestige of civilization for the next 187 k. There are very few places to turn off the highway to rest. Most people just park at the side of the road. Most of the traffic encountered were construction vehicles along a 50 k. stretch.

The roads in Cartwight are in complete contrast to the highway: rutted and corrugated. We parked with other trailers at the ticket office parking lot, located near the dock.

Spent a quiet day in Cartwright. We boarded the Sir Robert (not James) Bond Ferry at 4:30 for a 7:00 sailing. The ship was full to capacity, everyone returning home from vacation or making the best of a three day weekend before returning to school or work. The ship is far from luxurious. During the night many people, who did not have a broom closet size room, slept on the deck. The strangest thing about the ship is the food service. The cafeteria was open only until 6:30, ½ hour before sailing. Only snacks and the bar were open during the sailing itself. Wanted to see the Wunderstrand, a mile long white sand beach landmark for the Vikings, a two day journey from L’Anse aux Meadows. By the time we arrived at the coast and Porcupine Point, the sun had already set. After a fun night on board the ferry, we docked at Goose Bay-Happy Valley, NF. We woke up to a typical Labrador day: overcast, wet, and cool.

Our first stop was the Visitor’s center, which was closed: only opened Mon-Fri. I guess the people forget that an influx of people comes off a boat every Saturday between 8:00 and 9:00 AM, who might like some information about the town. We had heard that RVs were allowed to park in the town hall parking lot. But we did not know where that was and our map did not show it. We decided to go to a Tim Horton’s, think Dunkin’ Donuts in the States, and get needed nourishment, a cup of Java, and some necessary directions. Having gotten both and some good advice from the locals who had been on the ship with us, we were headed out the door, when we heard exclaimed, “CHICAGO?” I was wearing my Chicago Heights Roadway Jacket. We turned around and met a couple from Chicago. He worked for Serco, weather forecasters at the air base. After spending some time in conversation, he asked us if we wanted a tour of the facilities. The Greek chorus roared out a resounding, “YES”.

Goose Bay Airport was once one of the most significant military airbases in North America. The US built a mega-runway, long enough to land any aircraft and once employed 16,000 personnel as a SAC base until 1991. In the 1980s one of the space shuttles used the runway for a landing strip. We were escorted to the weather forecasting tower and given a cook’s tour of the facilities. The facility is divided into three sections,: observation, military briefing, and forecasting. They are responsible for the weather observation and reporting of a 240 K diameter area, the size of New England minus Maine. We were unable to go up into the adjacent air tower. The RAF, British Royal Air Force, was planning to start low flying maneuvers in a few minutes. We had missed the take off of a US AWACS plane a couple hours ago. We went out on the deck and watched as Tornado fighter planes took off from the runway, afterburners on and a thunderous roar in their wake; a pretty exciting spectacle. Between take offs a RCMP jet landed and taxied in front of us. Other smaller commercial planes also shared the runway. In other words, Goose Bay is a vibrant living entity. Also using the facilities are the German Air Force (Luftwafte), and the Canada 5 Wing.

On base is a Canex, like a PX in the States. Anyone can shop here. What makes this place unique is the wide selection of food available for Labrador. Specialty items are flown in from Germany and Great Britain, giving the servicemen and women a feeling of home. The German club has a restaurant open to the local citizens, but is closed to them until after tourist season in mid September.

A sunny day in Labrador. We saw some hiking trails in a brochure for Birch Brook Nordic Ski Club. The trails are well groomed and go through different types of forest ecosystems. One aspen tree has the scars of where a bear tried climbing it. At the top of one of the hills, called Lookout Rock, we were able to have a scenic view of Lake Melville and the environs. Along the trail we saw fresh piles of black bear scat. We knew it was black bear, because of the preponderance of blueberries and crackerberries in it. There were enough of them to make jam. NOT!!!

We continued the drive to North West River and Sheshitiu further along Lake Melville about twenty-five miles down lake. The towns are separated by a river and a chasm of cultural differences. Sheshitiu is Innui and is a resettlement community of the hunter/gatherers from Northern Canada. They hold the land in common and have little concept of private possessions and permanency of residences. It is a town you travel through, but do not want to stay. Your possessions are assumed to be communal property and so are treated as thus. On the other side of the river live the Innuit and Metis. Surprisingly there is no restaurant in town, just a grocery store. What the town does have to offer are beautiful beaches and trails. There are also two important museums there: the Labrador Museum and the Labrador Interpretation Center.

The Labrador Museum is divided into four sections: hunters/gatherers lifestyle, Hudson Bay Trading Company, Grenfell’s Medical Mission Work among the population, and the Hubbard Expedition of the Interior of 1903. We spent about one hour there looking at the exhibits.

The Labrador Interpretation Center was opened by Queen Elizabeth II in 1997. A modern building with artifacts thousands of years old from the different peoples settling Labrador. On display is a 100 year old sealskin kayak, which still looked pretty serviceable. The mannequins’ models were real people from Labrador. The Center also has a large auditorium which shows two movies about the different sections of Labrador.

On the way home we dropped by the Aurora Hotel and picked up the satellite phone for our journey to Churchill Falls tomorrow. This is a free service, secured by a credit card, on a twenty-four hour basis, whereby you can contact the RCMP in case of an emergency.

Before leaving Goose Bay on our trek to Churchill Falls and beyond, we had heard about the art work at the Labrador Medical Center about one hundred yards from us. The people were right. The art work is beautiful. Diana Dabinett, an artist from St. John’s did a series of painted silk hangings depicting different aspects of Labrador: birds, sea life, animals, and scenery. These are hanging in the cafeteria along with large oil painting of different scenes of Labrador: coastal, waterfalls, tree lined mountains. Along the corridors are folk sculptures done by the Innu and Innuit peoples. All of the signs in the hospital are written in three languages: English, Innu, and Innuit.

With satellite telephone in hand, off we went for the 180 mile adventure along the gravel road of Rte 500. The speed limit is 70 kph (42 mph). The road is well maintained but still rough. We saw two graders working on different parts of the road.. The views are of black spruce forests with aspens, birches, and other fir trees interspersed. The ground cover is primarily Caribou Moss; really a lichen. Near the East Metchin River is the ORMA Caribou Hunting Zone. Off to the side of the road you can see the remains of caribou, which have been killed for sport: hooves, bones, etc.

We reached Churchill Falls after six hours of driving. We averaged about thirty-five miles per hour. This included frequent rest stops. We did not want to race through the area, because of the presence of potholes, etc.

We went on a tour of the Churchill Falls Hydroelectric Underground Plant. This plant is the largest underground plant in the world, seventh largest electrical producer in the world, using eleven turbines to produce enough 60% of the electricity for Quebec Province and all of Labrador. We took an elevator over nine hundred feet into the bedrock, where the rock is over 3,000,000,000 (three billion) year old, some of the oldest rock in the world. I cannot fathom that number. The trip to Labrador is worth just taking this tour of the plant, an unknown wonder of the world. The reservoir of water used for the production is the size of the province of New Brunswick. It takes three days for the water to flow from it to reach the underground turbines.

The town itself is one of the few company towns still in existence. All of the housing and other facilities are owned and operated by the CFLCL, except the only gas station, and the hotel restaurant complex. The library for a town of only 650 people is quite extensive and is opened more than any library in Newfoundland Province, including St. John’s. The town is a great place to work, but not retire. The winters are quite challenging: -40° F and up to fifteen feet of snow annually. Most people plan to stay only five years, but remain because they become enamoured with the North Country living. Most people purchase pickup trucks, snowmobiles (one per family member), canoes, motorboats, and other adult recreational toys. To get away from meeting the same people while working, shopping, praying, etc., they build a cabin out of town. Everything is subsidized by the company, including food (same prices as St. John’s), housing, and freight transportation costs.

The tour guide mentioned about getting a sheet on the road conditions to Labrador City, which completely slipped our minds. We did remember to pick up the next satellite telephone, for which we are truly grateful. The road to Labrador City was an adventure. Some places you could go fifty mph, but then, almost immediately you hit a series of washboard road, which reduced your speed to less than fifteen mph. There are graders out to improve the road, but there is nothing to improve since most of the top layer has been already scraped off

We were very fortunate during our 160 mile trip. We only lost the cap to our sewer pipe connection and broke one wine glass. Everything was covered with a fine layer of dust. We wanted an adventure and our wish was fulfilled. We could still speak to each other fairly civilly–with a bit of effort.

We went touring Wabush and Labrador City, both towns were built in the late 60s and early 70s because of the iron deposits. First came the railroad from Sept-Iles, PQ. Later the road was built from Baie Comeau.

All of the mine tours ended the Friday before Labor Day. Once again we were a few days too late. We did see a couple of blasts. The Wabash mine set one off at 12:15. It was small. The ICC mine, however, set off a large one about an hour later.

About the Author

John and Maggie Pelley are Geriatric Gypsies. Both of us are retired from the rat race of working. We are full-time RVers, who ran away from home. We began our travels on the East Coast and, like the migrating birds, seek the warmth of the seasons. No more shoveling snow in Chicago. We have discovered volunteering with the National Park System. During our travels we have found that each town has a story to tell: some are more interesting than others. Both of us enjoy good listening music as we go. John has a CD he has recorded of Native American flure music. We have learned that RVing has a learning curve. We want to pass on some advice the help others avoid this trecherous curve. Life is an adventure. We are living it to the utmost.

RAF Air Cadets visit CAP Cadets

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Multi-user Vs Client Server Application

There is no denying the fact that the server is a multi-user computer where there is no unusual hardware prerequisite that turns a computer into a server and as such the hardware platform needs to be preferred based on application demands and financial stringency. Servers for client/server applications work unsurpassed when they are configured with an operating system that supports shared memory, application isolation, and preemptive multitasking. An operating system with preemptive multitasking enables a higher priority task to preempt or take control of the processor from a currently executing, lower priority task. The server provides and controls shared access to server resources. Applications on a server must be isolated from each other so that an error in one cannot damage another. Preemptive multitasking ensures that no single task can take over all the resources of the server and thwart other tasks from providing service. There must be a means of defining the relative priority of the tasks on the server. These requirements are specific to the client/server accomplishment and not to the file server implementation. Because file servers execute only the single task of file service, they can operate in a more limited operating background without the need for application isolation and anticipatory multitasking.

The conventional minicomputer and mainframe hosts have acted as de facto enterprise servers for the network of terminals they support. Because the only functionality available to the terminal user is through the host, personal productivity data as well as business systems information is stored on this host server. Network services, application services, and database services are provided centrally from the host server. Many organizations download data from legacy enterprise servers for local manipulation at workstations. In the client/server model, the definition of server will continue to include these functions, perhaps still implemented on the same or similar platforms. Moreover, the advent of open systems based servers is facilitating the placement of services on many different platforms. Client/server computing is a phenomenon that developed from the ground up. Remote workgroups have needed to share expensive resources and have connected their desktop workstations into local area networks LANs have grown until they are pervasive in the organization. However, frequently, they are isolated one from the other. Many organizations have integrated the functionality of their dumb terminals into their desktop workstations to support character mode, host-based applications from the single workstation. The next wave of client/server computing is occurring now, as organizations of the mid-1990s begin to use the cheaper and more available processing power of the workstation as part of their enterprise systems. The Novell Network Operating System (NOS), NetWare, is the most widely installed LAN. It provides the premier file and print server supports. However, a limitation of NetWare for the needs of reliable client/server applications has been the requirement for an additional separate processor running as a database server. The availability of database server software—from companies such as Sybase and Oracle—to run on the NetWare server, is plateful to disseminate this limitation.

Apropos to the functions, Servers provide application, file, database, print, fax, image, communications, security, systems, and network management services. These are each described in some detail in the following sections. It is important to understand that a server is an architectural concept, not a physical implementation explanation. Client and server functions can be provided by the same physical device. With the movement toward peer computing, every device will potentially operate as a client and server in response to requests for service. Application servers provide business functionality to support the operation of the client workstation. In the client/server model these services can be provided for an entire or partial business function invoked through an Inter Process Communication (IPC) request for service. Either message-based requests RPCs can be used. A collection of application servers may work in concert to provide an entire business function. For example, in a payroll system the employee information may be managed by one application server, earnings calculated by another application server, and deductions calculated by a third application server. These servers may run different operating systems on various hardware platforms and may use different database servers. The client application invokes these services without consideration of the technology or geographic location of the various servers. Object technology provides the technical basis for the application server, and widespread acceptance of the CORBA standards is ensuring the viability of this trend. File servers provide record level data services to no database applications. Required memory space for storage is allocated, and free space is managed by the file server.

Catalog functions are provided by the file server to support file naming and directory structure. Filename maximum length ranges from 8 to 256 characters, depending on the particular server operating system support. Stored programs are typically loaded from a file server for execution on a client or host server platform. Database servers are managed by a database engine such as Sybase, IBM, Ingress, Informix, or Oracle. The file server provides the initial space, and the database engine allocates space for tables within the space provided by the file server. These host services are responsible for providing the specialized data services required of a database product—automatic blackout and recovery after power, hardware, or software failure, space management within the file, database reorganization, record locking, deadlock detection, and management. Print servers provide support to receive client documents, queue them for printing, prioritize them, and execute the specific print driver logic required for the selected printer. The print server software must have the necessary logic to support the unique characteristics of each printer. Effective print server support will include error recovery for jams and operator notification of errors with instructions for restart. Fax servers provide support similar to that provided by print servers. In addition, fax servers queue up outgoing faxes for later distribution when communications charges are lower. Because fax documents are distributed in compressed form using either Group III or Group IV compression, the fax server must be capable of dynamically compressing and decompressing documents for distribution, printing, and display. This operation is usually done through the addition of a fax card to the server. If faxing is rare, the software support for the compression and decompression options can be used. Image servers operate in a manner similar to fax servers.

Infrastructure servers provide support for wide area network (WAN) communications. This support typically includes support for a subset of IBM System Network Architecture (SNA), asynchronous protocols, X.25, ISDN, TCP/IP, OSI, and LAN-to-LAN NetBIOS communication protocols. In the Novell NetWare implementation, Gateway Communications provides a leading communications product. In the LAN Server and LAN Manager environments, OS/2 communications server products are available from IBM and DCA. In the Banyan VINES environment, the addition of DCA products to VINES provides support for SNA connectivity. UNIX servers provide a range of product add-ons from various vendors to support the entire range of communications requirements. VMS servers support Decent, TCP/IP, and SNA as well as various asynchronous and serial communications protocols. MVS servers provide support for SNA, TCP/IP, and some support for other asynchronous communications. Security at the server restricts access to software and data accessed from the server. Communications access is controlled from the communications server. In most implementations, the use of a user login ID is the primary means of security. Using LAN Server, some organizations have implemented integrated Response Access/Control Facility (RACF) security by creating profiles in the MVS environment and downloading those to the LAN server for domain control. Systems and network management services for the local LAN are managed by a LAN administrator, but WAN services must be provided from some central location. Typically, remote LAN management is done from the central data center site by trained MIS personnel. The discussion in the following sections more specifically describes the functions provided by the server in a NOS environment. Requests are issued by a client to the NOS services software resident on the client machine. These services format the request into an appropriate RPC and issue the request to the application layer of the client protocol stack. This request is received by the application layer of the protocol stack on the server. File services handle access to the virtual directories and files located on the client workstation and to the server’s permanent storage. These services are provided through the redirection software implemented as part of the client workstation operating environment.

To diminish the effort and effect of installation and maintenance of software, software should be loaded from the server for execution on the client. New versions can be updated on the server and made immediately available to all users. In addition, installation in a central location reduces the effort required for each workstation user to knob the installation process. Because each client workstation user uses the same installation of the software, optional parameters are consistent, and remote help desk operators are aware of them. This simplifies the analysis that must occur to provide support. Sharing information, such as word processing documents, is easier when everyone is at the same release level and uses the same default setup within the software. Central productivity services such as style sheets and macros can be set up for general use. Most personal productivity products do permit local parameters such as colors, default printers, and so forth to be set locally as well. Backups of the server can be scheduled and monitored by a trained support person. Backups of client workstations can be scheduled from the server, and data can be stored at the server to facilitate recovery. Tape or optical backup units are typically used for backup; these devices can readily provide support for many users. Placing the server and its backups in a secure location helps prevent theft or accidental destruction of backups. A central location is readily monitored by a support person who ensures that the backup functions are completed. With more organizations looking at multimedia and image technology, large optical storage devices are most appropriately implemented as shared servers. High-quality printers, workstation-generated faxes, and plotters are natural candidates for support from a shared server. The server can accept input from many clients, queue it according to the priority of the request and handle it when the device is available. Many organizations realize substantial savings by enabling users to generate fax output from their workstations and queue it at a fax server for transmission when the communication costs are lower. Incoming faxes can be queued at the server and transmitted to the appropriate client either on receipt or on request. In concert with workflow management techniques, images can be captured and distributed to the appropriate client workstation from the image server. In the client/server model, work queues are maintained at the server by a supervisor in concert with default algorithms that determine how to distribute the queued work. Incoming paper mail can be converted to image form in the mail room and sent to the appropriate client through the LAN rather than through interoffice mail. Centralized capture and distribution enable images to be centrally indexed. This index can be maintained by the database services for all authorized users to query. In this way, images are captured once and are available for distribution immediately to all authorized users. Well-defined standards for electronic document management will allow this technology to become fully integrated into the desktop work environment. There are dramatic opportunities for cost savings and improvements in efficiency if this technology is properly implemented and used. Article 10 discusses in more detail the issues of electronic document management.

In the early hours database servers were actually file servers with a different interface. Products such as dBase, Clipper, FoxPro, and Paradox execute the database engine primarily on the client machine and use the file services provided by the file server for record access and free space management. These are new and more powerful implementations of the original flat-file models with extracted indexes for direct record access. Currency control is managed by the application program, which issues lock requests and lock checks, and by the database server, which creates a lock table that is interrogated whenever a record access lock check is generated. Because access is at the record level, all records satisfying the primary key must be returned to the client workstation for filtering. There are no facilities to execute procedural code at the server, to execute joins, or to filter rows prior to returning them to the workstation. This lack of capability dramatically increases the likelihood of records being locked when several clients are accessing the same database and increases network traffic when many unnecessary rows are returned to the workstation only to be rejected. The lack of server execution logic prevents these products from providing automatic partial update blackout and recovery after an application, system, or hardware failure. For this reason, systems that operate in this environment require an experienced system support programmer to assist in the recovery after a failure. When the applications are very straightforward and require only a single row to be updated in each interaction, this recovery issue does not arise. However, many client/server applications are required to update more than a single row as part of one logical unit of work. Client/server database engines such as Sybase, IBM’s Database Manager, Ingress, Oracle, and Informix provide support at the server to execute SERVER APPLICATION requests issued from the client workstation. The file services are still used for space allocation and basic directory services, but all other services are provided directly by the database server. Relational database management systems are the current technology for data management. The major disadvantage with the hierarchical technique is that only applications that access data according to its physical storage sequence benefit from locality of reference. Changes to application requirements that necessitate a different access approach require the data to be reorganized. This process, which involves reading, sorting, and rewriting the database into a new sequence, is not transparent to applications that rely on the original physical sequence. Indexes that provide direct access into the database provide the capability to view and access the information in a sequence other than the physical sequence. However, these indexes must be known to the user at the time the application is developed. The developer explicitly references the index to get to the data of interest. Thus, indexes cannot be added later without changing all programs that need this access to use the index directly. Indexes cannot be removed without changing programs that currently access the index. Most implementations force the application developer to be sensitive to the ordering and occurrence of columns within the record. Thus, columns cannot be added or removed without changing all programs that are sensitive to these records. Application sensitivity to physical implementation is the main problem with hierarchical database systems. Application sensitivity to physical storage introduced considerable complexity into the navigation as application programmers traverse the hierarchy in search of their desired data. Attempts by database vendors to improve performance have usually increased the complexity of access. If life is too easy today, try to create a bidirectional virtually paired IMS logical relationship; that is why organizations using products such as IMS and IDMS usually have highly paid database technical support staff. As hardware technology evolves, it is important for the data management capabilities to evolve to use the new capabilities. Relational database technology provides the current data management solution to many of the problems inherent in the flat-file and hierarchical technologies. In the late 1970s and early 1980s, products such as Software AG’s ADABAS and System 2000 were introduced in an attempt to provide the application flexibility demanded by the systems of the day. IBM with IMS and Cull net with IDMS attempted to add features to their products to increase this flexibility. The first relational products were introduced by ADR with Dotcom DB and Computer Corporation of America with Model 204. Each of these implementations used extracted indexes to provide direct access to stored data without navigating the database or sorting flat files. All the products attempted to maintain some of the performance advantages afforded by locality of reference (storage of related columns and records as close as possible to the primary column and record).

The development of a relational algebra defining the operations that can be performed between tables has enabled efficient implementations of RDBMS. The establishment of industry standards for the definition of and access to relational tables has speeded the acceptance of RDBMS as the de facto standard for all client/server applications today. Similar standards do not yet exist for OODBMSs. There is a place for both models. To be widely used, OODBMSs need to integrate transparently with RDBMS technology. Table 4.1 compares the terminology used by RDBMS and OODBMS proponents. Relational databases are characterized by a simple data structure. All access to data and relationships between tables are based on values. A data value occurrence is uniquely determined by the concatenation of the table name, column name, and the value of the unique identifier of the row (the primary key). Relationships between tables are determined by a common occurrence of the primary key values. Applications build a view of information from tables by doing a join based on the common values. The result of the join is another table that contains a combination of column values from the tables involved in the stick together. There remain some applications for which RDBMS have not achieved acceptable performance. Primarily, these are applications that require very complex data structures. Thousands of tables may be defined with many relationships among them. Frequently, the rows are sparsely populated, and the applications typically require many rows to be linked, often recursively, to produce the necessary view. The major vendors in this market are Objectivity Inc., Object Design, onto, and Versant. Other vendors such as HP, Borland, and Ingress have incorporated object features into their products. The application characteristics that lead to an OODBMS choice are shown in Figure 4.3. OODBMS will become production capable for these types of applications with the introduction of 16Mbps D-RAM and the creation of persistent (permanent) databases in D-RAM. Only the logging functions will use real I/O. Periodically, D-RAM databases will be backed up to real magnetic or optical disk storage. During 1993, a significant number of production OODBMS applications were implemented. With the confidence and experience gained from these applications, the momentum is building, and 1994 and 1995 will see a significant increase in the use of OODBMSs for business critical applications. OODBMSs have reached a maturity level coincident with the demand for multimedia enabled applications. The complexities of dealing with multimedia demands the features of OODBMS for effective storage and manipulation.

Client/server applications require LAN and WAN communication services. Basic LAN services are integral to the NOS. WAN services are provided by various communications server products. Article 5 provides a complete discussion of connectivity issues in the client/server model. Client/server applications require similar security services to those provided by host environments. Every user should be required to log in with a user ID and password. If passwords might become visible to unauthorized users, the security server should insist that passwords be changed regularly. The enterprise on the desk implies that a single logon ID and logon sequence is used to gain the authority once to access all information and process for the user has a need and right of access. Because data may be stored in a less physically secure area, the option should exist to store data in an encrypted form. A combination of the user ID and password should be required to decrypt the data. New options, such as floppy less workstation with integrated data encryption standard (DES) coprocessors, are available from vendors such as Beaver Computer Company. These products automatically encrypt or decrypt data written or read to disk or a communication line. The encryption and decryption are done using the DES algorithm and the user password. This ensures that no unauthorized user can access stored data or communications data. This type of security is particularly useful for laptop computers participating in client/server applications, because laptops do not operate in surroundings with the same physical security of an office. To be able to access the system from a laptop without properly utilizing an ID number and password would be courting disaster. NetWare is a family of LAN products with support for IBM PC-compatible and Apple Macintosh clients and IBM PC-compatible servers. NetWare is a proprietary NOS in the strict sense that it does not require another OS, such as DOS, Windows, Windows NT, OS/2, Mac System 7, or UNIX to run on a server. A separate Novell product—Portable NetWare for UNIX—provides server support for leading RISC-based UNIX implementations, IBM PC-compatible systems running Windows NT, OS/2, high-end Apple Macs running Mac System 7, and Digital Equipment Corporation VAXs running VMS. NetWare provides the premier LAN environment for file and printer resource sharing. It had 62 percent of the market share in 1993. It is widely installed as the standard product in many organizations.

Suffice it to say that LAN Manager and its IBM derivative, LAN Server, are the standard products for use in client/server implementations using OS/2 as the server operating system. LAN Manager/X is the standard product for client/server implementations using UNIX System V as the server operating system. Microsoft released its Advanced Server product with Windows NT in the third quarter of 1993. During 1994, it will be enhanced with support for the Microsoft network management services, currently referred to as “Hermes,” and Banyan’s Enterprise Network Services (ENS). Advanced Server is the natural migration path for existing Microsoft LAN Manager and IBM LAN Server customers. Existing LAN Manager/X customers probably won’t find Advanced Server an answer to their dreams before 1995. AT&T has taken over responsibility for the LAN Manager/X version. Vendors such as Hewlett-Packard (HP) have reticence the product from AT&T. AT&T and Microsoft has an agreement to maintain compatible APIs for all base functionality. LAN Manager and Advanced Server provide client support for DOS, Windows, Windows NT, OS/2, and Mac System 7. Server support extends to NetWare, AppleTalk, UNIX, Windows NT, and OS/2. Client workstations can access data from both NetWare and LAN Manager Servers at the same time. LAN Manager supports NetBIOS and Named Pipes LAN communications between clients and OS/2 servers. Redirection services are provided to map files and printers from remote workstations for client use. Advanced Server also supports TCP/IP communication. In early 1994, Advanced Server still will be a young product with many missing pieces. Even more troublesome, competitiveness between Microsoft and Novell is delaying the release of client requestor software and NetWare Core Protocol (NCP) support. Microsoft has added TCP/IP support to LAN Manager 2.1 and Advanced Server along with Net View and Simple Network Management Protocol (SNMP) agents. Thus, the tools are in place to provide remote LAN management for LAN Manager LANs. Microsoft has announced support for IBM Net View 6000 for Advanced Server management.

Advanced Server provides integrated support for peer-to-peer processing and client/server applications. Existing support for Windows NT, OS/2, UNIX, and Mac System 7 clients lets application, database, and communication servers run on the same machine as the file and print server. This feature is attractive in small LANs. The native operating system support for preemptive multitasking and storage protection ensures that these server applications do not reduce the reliability of other services. Even as Windows NT is rolled out to provide the database, application, and communications services to client/server applications, the use of Novell as the LAN NOS of choice will continue for peripheral resource sharing applications. Microsoft has attempted to preempt the small LAN market with its Windows for Workgroups product. This attacks the same market as NetWare Lite with a low-cost product that is tightly integrated with Windows. It is an attractive option for small organizations without a requirement for larger LANs. The complexities of systems management make it less attractive in an enterprise environment already using Novell. WWW can be used in conjunction with Novell for a workgroup wishing to use some WFW services, such as group scheduling. IBM has entered into an agreement to resell and integrate the Novell NetWare product into environments where both IBM LAN Server and Novell NetWare are required. NetWare provides more functional, easier-to-use, and higher-performance file and print services. In environments where these are the only LAN functions, NetWare is preferable to LAN Manager Derivatives. The capability to interconnect to the SNA world makes the IBM product LAN Server attractive to organizations that prefer to run both products. Most large organizations have department workgroups that require only the services that Novell provides well but may use LAN Server for client/server applications using SNA services such as APPN. IBM and Microsoft had an agreement to make the APIs for the two products equivalent. However, the dispute between the two companies over Windows 3.x and OS/2 has ended this cooperation. The most recent releases of LAN Manager NT 3 and LAN Server 3 are closer to the agreed equivalency, but there is no guarantee that this will continue. In fact, there is every indication that the products will diverge with the differing server operating system focuses for the two companies. IBM has priced LAN Server very attractively so that if OS/2 clients are being used, LAN Server is a low-cost option for small LANs. LAN Server supports DOS, Windows, and OS/2 clients. No support has been announced for Mac System 7, although it is possible to interconnect AppleTalk and LAN Server LANs to share data files and communication services.

Street Talk enables resources to be uniquely identified on the network, making them easier to access and manage. All resources, including file services, users, and printers, are defined as objects. Each object has a Street Talk name associated with it. Street Talk names follow a three-level hierarchical format: Item@Group@Organization. For example, a user can be identified as Psmith@Cerritos@Tnet. All network objects are stored in a distributed database that can be accessed globally. Novell’s NDS is similar to Street Talk in functionality. However, there are key differences. NDS can partition and replicate the database, which will generally improve performance and reliability. NDS is X.500-compliant and enables multiple levels of hierarchy. Street Talk supports a fixed three-level hierarchy. The NDS architecture offers more flexibility but with corresponding complexity and Street Talk is less flexible but fewer complexes to manage. One advantage the current version of Street Talk has over NDS is that Street Talk objects can have unlimited attributes available for selection. Novell and Microsoft have announced support for Banyan ENS within their products to be available in Q2 1994. Banyan and DCA provide SNA services to the VINES environment. VINES support UNIX, DOS, Windows, OS/2, and Mac System 7 clients. NFS is the standard file system support for UNIX. PC NFS is available from Sun Select and FTP to provide file services support from a UNIX server to Windows, OS/2, Mac, and UNIX clients. Client/server computing requires that LAN and WAN topologies be in place to provide the necessary internetworking for shared applications and data. Gartner Group1 surveyed and estimated the Microsystems’ integration topologies for the period 1986-1996; the results appear in Figure 4.6. Of special interest is the projection that most workstations will be within LANs by 1996, but only 14 percent will be involved in an enterprise LAN by that date. These figures represent a fairly pessimistic outlook for interconnected LAN-to-LAN and enterprise-wide connectivity. These figures probably will prove to be substantially understated if organizations adopt an architectural perspective for the selection of their platforms and tools and use these tools within an organizationally optimized systems development environment (SDE). Routers and communication servers will be used to provide communication services between LANs and into the WAN. In the client/server model, these connections will be provided transparently by the SDE tools. There are significant performance implications if the traffic volumes are large. IBM’s LU6.2 implementation in APPC and TCP/IP provides the best support for high-volume, LAN-to-LAN/WAN communications. DEC’s implementation of DECnet always has provided excellent LAN-to-WAN connectivity. Integrated support for TCP/IP, LU6.2, and IPX provides a solid platform for client/server LAN-to-WAN implementation within DECnet.

The lack of real estate on the desktop encouraged most organizations to move to a single device—using terminal emulation from the workstation—to access existing mainframe applications. It will take considerable time and effort before all existing host-based applications in an organization are replaced by client/server applications. In the long term, the host will continue to be the location of choice for enterprise database storage and for the provision of security and network management services. Mainframes are expensive to buy and maintain, hard to use, inflexible, and large, but they provide the stability and capacity required by many organizations to run their businesses. As Figure 4.7 notes, in the view of International Data Corporation, they will not go away soon. Their roles will change, but they will be around as part of the enterprise infrastructure for many more years. Only organizations who create an enterprise architecture strategy and transformational plans will accomplish the migration to client/server in less than a few years. Without a well-architected strategy, gradual evolution will produce failure. Information that is of value or interest to the entire business must be managed by a central data administration function and appear to be stored on each user’s desk. These applications are traditionally implemented as Online Transaction Processing (OLTP) to the mainframe or minicomputer. With the client/server model, it is feasible to use database technology to replicate or migrate data to distributed servers. Wherever data resides or is used, the location must be transparent to the user and the developer. Data should be stored where it best meets the business need. Online Transaction Processing applications are found in such industries as insurance, finance, government, and sales—all of which process large numbers of transactions. Each of these transactions requires a minimal amount of user think time to process. In these industries, data is frequently collected at the source by the knowledgeable worker. As such, the systems have high requirements for availability, data integrity, performance, concurrent access, growth potential, security, and manageability. Systems implemented in these environments must prove their worth or they will be rejected by an empowered organization. They must be implemented as an integral part of the job process. OLTP has traditionally been the domain of the large mainframe vendors—such as IBM and DEC—and of special-purpose, fault-tolerant processors from vendors such as Tandem and Stratus. The client/server model has the capability to provide all the services required for OLTP at much lower cost than the traditional platforms. All the standard client/server requirements for a GUI—application portability, client/server function partitioning, software distribution, and effective development tools—exist for OLTP applications. The first vendor to deliver a production-quality product in this arena is Cooperative Solutions with its Ellipse product. Prior to Ellipse, OLTP systems required developers to manage the integrity issues of unit-of-work processing, including currency control and transaction rollback. Ellipse provides all the necessary components to build systems with these features. Ellipse currently operates with Windows 3.x, OS/2 clients, and OS/2 servers using the Sybase database engine. Novell is working with Cooperative Solutions to port Ellipse as a Novell NetWare Loadable Module (NLM). It provides a powerful GUI development environment using a template language as shorthand for development. This language provides a solid basis for building an organizational SDE and lends itself well to the incorporation of standard components. As UNIX has matured, it has added many of the features found in other commercial operating systems such as VMS and MVS. There are now several offerings for OLTP with UNIX. IBM is promoting CICS 6000 as a downsizing strategy for CICS MVS. Database services will be provided by a combination of AIX and MVS servers.

With the release of Windows NT (New Technology) in September of 1993, Microsoft staked its unique position with a server operating system. Microsoft’s previous development of OS/2 with IBM did not create the single standard UNIX alternative that was hoped for. NT provides the preemptive multitasking services required for a functional server. It provides excellent support for Windows clients and incorporates the necessary storage protection services required for a reliable server operating system. Its implementation of C2 level security goes well beyond that provided by OS/2 and most UNIX implementations. It will take most of 1994 to get the applications and rugged zing necessary to provide an industrial strength platform for business critical applications. With Microsoft’s prestige and marketing muscle, NT will be installed by many organizations as their server of choice. IBM provides MVS as a platform for large applications. Many of the existing application services that organizations have purchased operate on System 370-compatible hardware running MVS. The standard networking environment for many large organizations—SNA—is a component of MVS. IBM prefers to label proprietary systems today under the umbrella of SAA. The objective of SAA is to provide all services on all IBM platforms in a compatible way—the IBM version of the single-system image. There is a commitment by IBM to provide support for the LAN Server running natively under MVS. This is an attractive option for organizations with large existing investments in MVS applications. The very large data storage capabilities provided by System 370-compatible platforms with MVS make the use of MVS for LAN services attractive to large organizations. MVS provides a powerful database server using DB2 and LU6.2. With broad industry support for LU6.2, requests that include DB2 databases as part of their view can be issued from a client/server application. Products such as Sybase provide high-performance static SERVER APPLICATION support, making this implementation viable for high-performance production applications. Digital Equipment Corporation provides OPENVMS as its server platform of choice. VMS has a long history in the distributed computing arena and includes many of the features necessary to act as a server in the client/server model. DEC was slow to realize the importance of this technology, and only recently did the company enter the arena as a serious vendor. NetWare supports the use of OPENVMS servers for file services. DEC provides its own server interface using a LAN Manager derivative product called Patchworks. Patchworks run native on the VAX and RISC Alpha RXP. This is a particularly attractive configuration because it provides access on the same processor to the application, database, and file services provided by a combination of OPENVMS, NetWare, and LAN Manager. Digital and Microsoft have announced joint agreements to work together to provide a smooth integration of Windows, Windows NT, Patchworks, and OPENVMS. This will greatly facilitate the migration by OPENVMS customers to the client/server model. VAX OPENVMS support for database products such as RDB, Sybase, Ingress, and Oracle enables this platform to execute effectively as a database server for client/server applications. Many organizations have large investments in VAX hardware and DECnet networking. The option to use these as part of client/server applications is attractive as a way to maximize the value of this investment. DECnet provides ideal support for the single-system image model. LAN technology is fundamental to the architecture of DECnet. Many large organizations moving into the client/server world of computing have standardized on DECnet for WAN processing. For example, Kodak selected Digital as its networking company even after selecting IBM as its mainframe outsourcing company.

UNIX is a primary player as a server system in the client/server model. Certainly, the history of UNIX in the distributed computing arena and its open interfaces provide an excellent opportunity for it to be a server of choice. To understand what makes it an open operating system, look at the system’s components. UNIX was conceived in the early 1970s by AT&T employees as an operating environment to provide services to software developers who were discouraged by the incompatibility of new computers and the lack of development tools for application development. The original intention of the UNIX architecture was to define a standard set of services to be provided by the UNIX kernel. These services are used by a shell that provides the command-line interface. Functionality is enhanced through the provision of a library of programs. Applications are built up from the program library and custom code. The power and appeal of UNIX lie in the common definition of the kernel and shell and in the large amount of software that has been built and is available. Applications built around these standards can be ported to many different hardware platforms. The objectives of the original UNIX were very comprehensive and might have been achieved except that the original operating system was developed under the auspices of AT&T. Legal ramifications of the consent decree governing the breakup of the Regional Bell Operating Companies (RBOCs) prevented AT&T from getting into the computer business. As a result, the company had little motivation early on to promote UNIX as a product. To overcome this, and in an attempt to achieve an implementation of UNIX better suited to the needs of developers, the University of California at Berkeley and other institutions developed better varieties of UNIX. As a result, the original objective of a portable platform was compromised. The new products were surely better, but they were not compatible with each other or the original implementation. Through the mid-1980s, many versions of UNIX that had increasing functionality were released. IBM, of course, entered the fray in 1986 with its own UNIX derivative, AIX. Finally, in 1989, an agreement was reached on the basic UNIX kernel, shell functions, and APIs. The computing community is close to consensus on what the UNIX kernel and shell will look like and on the definition of the specific APIs. Figure 4.8 shows the components of the future standard UNIX operating system architecture.

During all of these gyrations, one major UNIX problem has persisted that differentiates it from DOS, Windows NT, and OS/2 in the client/server world. Because the hardware platforms on which UNIX resides come from many manufacturers and are based on many different chip sets, the “off-the-shelf” software that is sold for PCs is not yet available for UNIX. Software is sold and distributed in its executable form, so it must be compiled and linked by the developer for the target platform. This means that organizations wishing to buy UNIX software must buy it for the specific target platform they are using. This also means that when they use many platforms in a distributed client/server application, companies must buy different software versions for each platform.

UNIX is particularly desirable as a server platform for client/server computing because of the large range of platform sizes available and the huge base of application and development software available. Universities are contributing to the UNIX momentum by graduating students who see only UNIX during their student years. Government agencies are insisting on UNIX as the platform for all government projects. The combination of these pressures and technology changes should ensure that UNIX compatibility will be mandatory for server platforms in the last half of this decade. OSF initially developed Motif, a graphical user interface for UNIX, that has become the de facto UNIX GUI standard. The Distributed Computing Environment (DCE) is gaining acceptance as the standard for distributed application development although its Distributed Management Environment has yet to achieve such widespread support. OSF/1, the OSF defined UNIX kernel, has been adopted only by DEC, although most other vendors have made promises to support it. OSF/1 brings the promise of a UNIX micro kernel more suitable to the desktop environment than existing products. The desire for a standard UNIX encourages other organizations. For example, the IEEE tackled the unified UNIX issue by establishing a group to develop a standard portable operating system called POSIX. The objective is to develop an ANSI standard operating system. POSIX isn’t UNIX, but it is UNIX-like. POSIX standards (to which most vendors pledge compliance) exist today. DEC’s OPENVMS operating system, for example, supports published POSIX standards. POSIX at this point, however, does little to promote interoperability and portability because so little of the total standard has been finalized. Simple applications that will run across different POSIX-compliant platforms will be written. However, they will be limited applications because developers will be unable to use any of the rich, non-POSIX features and functions that the vendors offer beyond the basic POSIX-compliant core. X/Open started in Europe and has spread to include most major U.S. computer makers. X/Open is having significant impact in the market because its goal is to establish a standard set of Application Programming Interfaces (APIs) that will enable interoperability. These interfaces are published in the X/Open Portability Guide. Applications running on operating systems that comply with these interfaces will communicate with each other and interoperate, even if the underlying operating systems are different. This is the key objective of the client/server model. The COSE announcement by HP, IBM, SCO, Sun, and Univel (Novell/USL) in March 1993 at the Uniforms Conference is the latest attempt to create a common ground between UNIX operating systems. The initial COSE announcement addresses only the user’s desktop environment and graphical user interface; although in time it is expected to go further. COSE is a more pragmatic group attempting to actually “get it done.” Another major difference from previous attempts to create universal UNIX standards is the involvement of SCO and Sun. These two organizations own a substantial share of the UNIX market and have tended to promote proprietary approaches to the desktop interface. SCO provides its Open Desktop environment, and Sun offers Open Look. The commitment to Motif is a significant concession on their part and offers the first real opportunity for complete vendor interoperability and user transparency to platform.

In October of 1993, Novell decided to bestow the rights to the UNIX name to X/Open so that all vendors can develop to the UNIX standards and use the UNIX name for their products. This largely symbolic gesture will eliminate some of the confusion in the marketplace over what software is really UNIX. COSE is looking beyond the desktop to graphics, multimedia, object technology, and systems management. Networking support includes Novell’s NetWare UNIX client networking products, OSF’s DCE, and SunSoft’s Open Network Computing. Novell has agreed to submit the NetWare UNIX client to X/Open for publication as a standard. In the area of graphics, COSE participants plan to support a core set of graphics facilities from the X Consortium, the developer of X Windows. Addressing multimedia, the COSE participants plan to submit two joint specifications in response to the Interactive Multimedia Association’s request for technology. One of those specifications, called Distributed Media Services (DMS), defines a network-independent infrastructure supporting an integrated API and data stream protocol. The other—the Desktop Integrated Media Environment—will define multimedia access and collaboration tools, including at least one basic tool for each data type supported by the DMS infrastructure. The resulting standard will provide users with consistent access to multimedia tools in MultiFinder environments. COSE also addresses object technology, an area targeted by IBM and Sun. The group will support the efforts of the Object Management Group (OMG) and its Common Object Request Broker (CORBA) standard for deploying and using distributed objects. IBM already has a CORBA-compliant object system in beta test for AIX. Sun built an operating system code named spring as a proof of concept in 1992. Sun has a major project underway, called Distributed Objects Everywhere (DOE), that is producing very exciting productivity results. Finally, COSE will focus on the management of distributed file systems, distribution, groups and users, print spooling, software installation licensing, and storage. It is not a coincidence that these vendors are coming together to define a standard UNIX at this time. The COSE effort is a defensive reaction to the release of Microsoft’s Windows NT. With this commitment to a 32-bit desktop and server operating system, Microsoft has taken the wind out of many of the UNIX claims to technical superiority. Despite its numerous advantages as a desktop and server operating system, UNIX never has been widely accepted in the general corporate world that favors DOS/Windows and Novell’s NetWare. A key drawback to UNIX in the corporate arena has been the lack of a single UNIX standard. UNIX has a well established position as the operating system of choice for distributed relational databases from vendors like Informix, Ingress, Oracle, and Sybase. Most of these vendors, however, will port their products to Windows NT as well. Any effort to reduce the problems associated with the multiple UNIX variants will do much to bolster the stature of UNIX as a worthwhile alternative to Windows NT.

Spin this fantasy around in your mind. All the major hardware and software vendors get together and agree to install a black box in their systems that will, in effect, wipe away their technological barriers. This black box will connect a variety of small operating systems, dissimilar hardware platforms, incompatible communications protocols, all sorts of applications and database systems, and even unlike security systems. And the black box will do all this transparently, not only for end users but also for systems managers and applications developers.2 OSF proposes the distributed computing environment (DCE) as this black box. DCE is the most important architecture defined for the client/server model. It provides the bridge between existing investments in applications and new applications based on current technology. Figure 4.10 shows this architecture defined by the OSF. The first product components of DCE were released in the third quarter of 1991. DCE competes directly with Sun’s open network computing (ONC) environment and indirectly with many other network standards. OSF/1 and DCE are almost certain to win this battle because of the massive market presence of the OSF sponsors. IBM has now committed to making its AIX product OSF/1 compatible by early 1994. It will be 1995 before the product is mature and complete enough to be widely used as part of business applications. In the interim, product vendors and systems integrators will use it to build portable products and applications. The general availability of code developed for previous, similar product components will speed the process and enable new development to be modeled on the previous releases. DCE has been described as another layer grouping in the OSI model.3 DCE provides the link between pure communications on the lower layers and end-user applications.

These components become active whenever a local application requests data, services, or processes from somewhere. The OSF says that DCE will make a network of systems from multiple vendors appear as a single stand-alone computer to applications developers, systems administrators, and end users. Thus, the single-system image is attained. Remote Procedure Call (RPC) and Presentation Services: Interface Definition Languages (IDLs) and RPCs enable programmers to transfer control and data across a network in a transparent manner that helps to mask the network’s complexity. DCE uses the RPC originally developed by the HP Apollo Network Computing System (NCS), with some enhancements by DEC and IBM. NCS also provides the Network Data Representation (NDR), a virtual data representation. NDR enables data to be exchanged between various vendor products transparently. Conversions (as necessary) will take place with no intervention by the caller. Naming, security, file system, and data type conversions may take place as data is transported between various platforms. Naming: User-oriented names, specifying computers, files, and people should be easily accessible in a distributed environment. These directory services must offer standard appearance and rules for all clients. DCE supports the X.500 directory services standard, adding extensions from DEC’s Domain Name Service (DECdns). The standardized X.500 code is Siemens Nixdorf’s DIR-X X.500 service. Security: Distributed applications and services must identify users, control access to resources, and guard the integrity of all applications. DCE uses the Kerberos authentication service, developed by MIT as part of its Athena networking project and enhanced by Hewlett-Packard. This service is one of the major challenges to making products available quickly, because very few products today are developed with an awareness of this specification. Threads: This terminology represents a method of supporting parallel execution by managing multiple threads of control within a process operating in a distributed environment. Threads enable systems to start up multiple processes and forget about them until they are completed. This is especially important for network servers that may have to handle many requests from many clients at the same time. They must be able to do this without waiting for the previous request to complete. DCE is using DEC’s Concert Multithread Architecture (CMA) implementation. Time Service: A time service synchronizes all system clocks of a distributed environment so that executing applications can depend on equivalent clocking among processes. Consider that many machines operating in many time zones may provide processes as part of a single application solution.

It is essential that they agree on the time in order to manage scheduled events and time-sequenced events. DCE is using a modification of DEC’s Distributed Time Synchronization Service. Distributed File Services: By extending the local file system throughout the network, users gain full access to files on remote configurations. DCE uses Sun’s Network File System (NFS) Version 2 and provides next-generation capabilities with the Andrew File System (AFS), developed at Carnegie-Mellon University and commercialized by Transact Corp. Diskless operations under AFS are supported by development work done by Hewlett-Packard. PC Integration: Integration enables PCs using MS-DOS, Windows NT, and OS/2 to access file and print services outside the MS-DOS environment. DCE uses Microsoft’s LAN Manager/X. Management: Although partly addressed by the previous components, management is so complex in a distributed, heterogeneous configuration that OSF has defined a new architecture: distributed management environment (DME). DME provides a common framework for the management of stand-alone and distributed systems. This framework provides consistent tools and techniques for managing different types of systems and enables vendors to build system management applications that work on a variety of platforms. OSF will base DME on technology from Hewlett-Packard’s Open View product.

SAA is IBM’s distributed environment. SAA was defined by IBM in 1986 as an architecture to integrate all IBM computers and operating systems, including MVS, VM/CMS, OS/400, and OS/2-EE. SAA defines standards for a common user access (CUA) method, common programming interfaces (CPI), and a common communication link (APPC). To support the development of SAA-compliant applications, IBM described SAA frameworks (that somewhat resemble APIs). The first SAA framework is AD/Cycle, the SAA strategy for CASE application development. AD/Cycle is designed to use third-party tools within the IBM SAA hardware and mainframe Repository Manager/MVS data storage facility. Several vendors have been selected by IBM as AD/Cycle partners, namely: Intervolve, Knowledge Ware, Bachman, Synod, Systematic a, and Easel Corp. Several products are already available, including the Easel Workbench toolkit, Bachman DB2, CSP tools, and the Knowledge Ware Repository and MVS tools. Unfortunately, the most important component, the Repository Manager, has not yet reached production quality in its MVS implementation and as yet there are no plans for a client/server implementation. Many original IBM customers involved in evaluating the Repository Manager have returned the product in frustration. Recently, there has been much discussion about the need for a production-quality, object-oriented database management system to support the entity relationship (ER) model underlying the repository. Only this, say some sources, will make implementation and performance practical. A further failing in the SAA strategy is the lack of open systems support. Although certain standards, such as Motif, SERVER APPLICATION, and LU6.2, are identified as part of SAA; the lack of support for AIX has prevented many organizations from adopting SAA. IBM has published all the SAA standards and has licensed various protocols, such as LU6.2. The company has attempted to open up the SAA software development world. IBM’s director of open systems strategy, George Siegel, says that IBM believes in openness through interfaces. Thus, the complete definition of APIs enables other vendors to develop products that interface with IBM products and with each other. Recent announcements, such as support for CICS AIX, point to a gradual movement to include AIX in the SAA platforms. The first SAA application that IBM released, Office Vision, was a disaster. The product consistently missed shipping dates and lacked much of the promised functionality. IBM has largely abandoned the product now and is working closely with Lotus and its workgroup computing initiatives. IBM has consistently defined common database, user interface, and communications standards across all platforms. This certainly provides the opportunity to build SAA-compliant client/server applications.

IBM has clarified System View as its DME product. System View defines APIs to enable interoperability between various vendor products. It is expected to be the vehicle for linking AIX into centralized mainframe sites. IBM has stated that System View is an open structure for integrating OSI, SNA, and TCP/IP networks. At this time, System View is a set of guidelines to help third-party software developers and customers integrate systems and storage management applications, data definitions, and access methods. The guidelines are intended to further support single-system image concepts.

In view of the above, it is a significant fact that The recent introduction of CICS for OS/2, AIX, and OS/400 and the announcement of support for AIX mean that a single transaction-processing platform is defined across the entire range of products. Applications developed under OS/2 can be ported to interoperate between OS/2, OS/400, MVS, and eventually AIX, without modification. COBOL and C are common programming languages for each platform. SERVER APPLICATION is the common data access language in all platforms. The failure of SAA is attributable to the complexity of IBM’s heterogeneous product lines and the desire of many organizations to move away from proprietary to open systems solutions. This acknowledgment piloted IBM to announce its new Open Enterprise plan to replace the old System Application Architecture (SAA) plan with an open network strategy. System View is a key IBM network product linking OS/2, UNIX, and AS/400 operating systems. Traditional Systems Network Architecture (SNA) networking will be replaced by new technologies, such as Advanced Peer-to-Peer Communications (APPC) and Advanced Peer-to-Peer Networking.

Written by: Kh. Atiar Rahman

Counter Part Officer

Financial Management Reform Programme

About the Author

written by: Kh. Atiar Rahman
Counter Part Officer
Financial Management Reform Programme
Ministry of Finance, Finance Division

LLC planning on using a DBA?

My cousin and I are pilots for a Part 135 Air Taxi in Alaska. We recently bought the company, an LLC, and are planning on registering a DBA and keeping the LLC name (which is the airline name right now) the same. Do we need to notify the FAA and have our operating certificate changed to reflect the DBA? Or can we simply register the DBA with the State and get an updated business license and begin using it (DBA name on our aircraft, advertising the DBA, etc…) while our operating certificate still only has the LLC name? Also, would it be easier to change the name of our LLC, and what does that require? Any help would be great, (I’m 24 years old, no business experience). We’re both learning as we go. Thanks!
The changes to the operating certificate (not business license) are what we are most concerned about. As far as business goes, we sure don’t have a problem making money…

Maybe you should post this in business and finance. I don’t think FAA regs are your biggest problem.

Perhaps a few business classes would have been prudent, or should be in the near future.

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The brass hat; being hints on how to make the job easier …

Gremlins on the job …

royal air force jobs

Qualities That Candidates For Military Jobs Should Possess

Can you see yourself serving your Queen and country? Do you have the dedication to undergo a gruelling training regime to fulfil this desire? If so jobs in the military could be for you. Whether it is the navy, air force, army or the ministry of defence military jobs are rewarding and give you the knowledge that you are doing to protect your home nation. Could you handle this responsibility?

The military and defence industries are one of the largest employers in the country. From taking in recruits for armed service or employing the best brains to plan strategy and develop cutting edge technologies, jobs within the military are numerous. What kind of job you get in the military is ultimately your choice, whether it is flying fast jets or being at the wheel of a multi-million pound warship, if you have the determination you can get any of these jobs.

For those who have graduated the three armed forces will take on any graduates, specific degrees such as medicine and engineering will gain you specific military jobs such as royal engineer or field doctor. Purely having a degree however is not an easy ticket, the armed forces are not just looking for anybody, the military want a recruit that matches their criteria.

It is not just your intellect that will lead into military jobs; the armed forces want a candidate who is healthy, in terms of their mind and their soul. Fundamentally they want leadership qualities; they will look for sporting achievements in your CV as these show leadership and other transferable skills that apply to the military sphere.

To make it more likely to gain jobs within the military it is advisable to join the university training corps and prove yourself to be active in sporting events. Other great ways to become appealing to forces recruiters is to undertake jobs for the student’s union such as planning and organising events. The ability to organise and lead a team of people is a quality that the military will be able to utilise.

Fundamentally the military are looking a candidate who is committed. Those who begin looking into military jobs just as they are leaving university are usually overlooked. Apparently doing this does not show the qualities of initiative, influence or ambition needed for jobs in the military. They want someone who has not just drifted through the rigours of university life but someone who has strived throughout their education and made the most of the opportunities offered to them.

Leadership is not the only quality that military recruiters are looking for. An equally important facet to your personality should the ability to support colleagues and work within a team. A great way to do this is to chair a committee or become a president of a society. Stretching yourself in all aspects of life is also advisable, this may be physically in sport or expedition, but equally may be something intellectual like starting a business while at university.

While at university it is advisable to contact your military liaison officer early on. Firstly this will show your commitment to entering service but also give you a good idea of the jobs available to you when you finally graduate. Pre- graduation activities organised by the military recruitment services will further show your dedication to signing up.

Jobs within the military are in no doubt challenging, physically, mentally and emotionally. Recruiters want candidates that will not be daunted by the challenging nature of military work. It is precisely the desire to tackle the challenge head on that the recruiters are looking for. Energetic candidates with a great deal of determination should seriously consider jobs within the military sphere.

About the Author

Recruitment expert Thomas Pretty looks into the qualities needed to be suitable for military jobs . To find out more please visit Need a Job

Im considering joining the Royal Air Force?

I’m 16, have just left school and I have also applied for a local sixth form, I am on target for 11 GCSE’s, most of which are at A or B standard.
However, I dont exactly enjoy working in a classroom all day long, and I have an extremely short concentration span when doing things I dont enjoy doing.

My grandad enlisted in 1941, and then went to Officer School, he flew Hurricanes, Mustangs, Spitfires, and P-40’s i believe. Non 100% sure on the p-40s. He reached the rank of the equivalence to Captain in US terms, he then was the flying wing commander of Sword Beach on D-Day. He loved it, but saw too much death. If you are going for technician, no need to worry, you won’t be flying.. But you’ll need to know everything about it..

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online helicopter flight simulator games

flying simulator games

Flight simulation games are available online

The realism of the latest offering of flight simulation games is amazingly true to life the characteristics and handling of the aircraft are meticulously modelled on the real thing, the scenery graphics and flight conditions are exactly modelled on real life, you can even model real time weather conditions and flight conditions such as weather and wind turbulence in online mode you can fly in weather conditions that replicate the weather conditions anywhere in the world at any given time

There are many flight simulator games for every game platform from Nintendo to play-station but often the pc downloads are more detailed and accurate to real aircraft. They are limited in graphics and scenery and of course realistic flight characteristics the higher end of the market in flight simulators enable you to experience individual aircraft and helicopter handling the Cessna and the Boeing feel and perform like the real thing and the scenery replicates the whole globe including detailed airports and runways.

Some of the aircraft in flight simulation games are so detailed that for example the cockpit of the Boeing 747 is very complicated as each dial and control has to be activated in sequence just like the real thing, but the in game tutorials make even the most complicated aircraft easy to handle.

The flight simulator games are good entertainment for enthusiast and beginner alike they are becoming very similar to the software use to train real pilots, it is even possible to navigate actual flight paths and weather conditions.

Aircraft enthusiasts are becoming very involved in flight simulator games and they are starting to influence players to become aircraft designers and pilots.But it is equally suitable for novices that are new to aircraft simulation games,a beginner may decide to fly the light aircraft or helicopters until their skill levels improve.

Flight simulation software has really advanced in recent months it is now possible to fly aircraft such as the large commercial type planes,small light aircraft, helicopters and fighter planes with such realism that you could be learning to fly the real thing.

The airports in the latest flight simulation games are 3d models scaled to size and very realistic in every detail even the runways and any obstacles that may hinder take off and landings are equally as detailed which makes the whole package interesting and fun.

Cockpit switches and dials are also meticulously copied to reflect the real aircraft and you are shown through tutorials the sequence to start and fly the planes.

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To learn more about flight simulator games flying simulator games

How to Fly a Helicopter in Flight Simulator X

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Should I join the RAF or an airline?

I am training to become a pilot and I can’t decide when I have been to university whether I should join the Royal Air Force or an airline like easyJet or Ryanair because I’m not very “fit” so I would need to work to get into the RAF. I will finish Uni at 21 with only a PPL with maybe an Instrument Rating and Night Rating. As far as I know the two airlines offer a training course with a bond and reduced salary for “x” number of years. If I was going to join the RAF it would be a short service as I am a wimp!! LOL!! Please help!!

Personally sam I think you should join the forces. they have great pay and conditions great leave and excellent training, if after you get out you want to fly commercially it would look good on your record. whether you join the RAF or a commercial liner you do need to be fit. The Raf will be harder of course because thats a general reaquirement. but think of this. if you are large you will need to loose weight or be able to fit out of a small emergency exit usually the window in the flight deck or through the flight deck door which is quite small but then again in an emergency you could still get through it. I have seen guys from my work who are quite large fit through it somehow. anyway in the end it is up to you but the airlines and the raf do require fitness standards. after all you will be flying for long periods of time and the pressure in the cabin could also affect you. I suggest you start eating healthy and some walking at least. you dont have to be a muscle man just reasonably fit cardio wise. goodluck

RAF CRANWELL BAC TSR2 RETURNS