Addressing OLTP Solutions with CICS: The Transaction Server ... - Ibm

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11.1 The Big Picture 158 CICS for AIX as the Transaction Server Figure 42 on page 159 shows you an overall view of TDJ′s OLTP complex. This is a complex, highly interconnected environment. It was not built by a single big project. Instead, it has grown organically as the business needs arose. At each stage of the growth existing investments were preserved and protected while at the same time pursuing a highly distributed open OLTP strategy. The core of the OLTP complex is made up of 16 CICS for AIX regions that provide transaction processing capabilities to serve the different business units within the enterprise. A variety of DB2 databases largely form the permanent storage for the enterprise data. The PCs and workstations of the end users form local LANs that are in turn connected to various servers to build a hierarchy of networks, which result in the enterprise network. The three mainframe systems remain active and serve a number of end users through the 3270 terminals located at the corporate headquarters. They also serve as the archive servers for old data from other computers within the enterprise. Corporate legacy data and applications are now accessible by any authorized user across the whole of the enterprise network. With the recent explosive growth in usage of the Internet and Web servers, Kangaroo Airlines established a Web server that is capable of obtaining flight booking information from the CICS transaction that runs under CICS for AIX. Thus the potential traveler can make his or her own inquiry about the price of an air ticket, flight schedules, or seat availability on a particular flight, all from a PC or workstation at any time of the day. Within Kangaroo Leisure Group current data is stored in various databases that reside on a number of different platforms. The main databases are for airline reservation, hotel reservation, and travel booking. Access to these databases by a front-line staff is extremely important because the group advertises extensively that it provides friendly ONE STOP shopping for your next dream holiday! The Lion Financial Group requires continuous availability for its car, travel, and house insurance systems so that its branch offices and agents around the globe always have access. The core machine is a RISC System/6000 SP (9076) with 16 nodes running seven CICS for AIX regions that access a parallel database. The group has started to set up a Web server to enable existing and potential clients to browse the new product offerings at their own pace. The ability to submit loan applications through the Internet is still under trial. Dragon Industries Group has a number of manufacturing plants located in several countries. These plants have their own local computers that communicate with the Group′s central machine so that details such as current inventory, pending orders, and shipment details are readily available. Thus it is possible to track the current production status and identify any bottlenecks. The group has a “just-in-time” manufacturing policy and is actively pursuing ISO 9000 accreditation. Therefore it is vital to have the relevant procedures up to date and available online to all authorized staff.
Figure 42. The OLTP Complex of TDJ Enterprise International Limited The complex is divided into six areas. Each of these areas has been chosen to highlight how the IBM Software Server and CICS for AIX in particular have helped TDJ pursue its strategy of developing an open distributed OLTP environment. Chapter 11. TDJ Enterprise International Limited 159
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Addressing OLTP Solutions with CICS
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Take Note! Before using this inform
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iv CICS for AIX as the Transaction
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9.4 Security Issues on the Internet
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viii CICS for AIX as the Transactio
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x CICS for AIX as the Transaction S
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xii CICS for AIX as the Transaction
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The Team That Wrote This Redbook xi
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xvi CICS for AIX as the Transaction
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2 CICS for AIX as the Transaction S
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1.2 Complex OLTP Business Environme
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Figure 2. OLTP Complex for XYZ Insu
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By using common application program
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1.5 OLTP Market 10 CICS for AIX as
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Figure 5. OLTP Market Segmentation
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14 CICS for AIX as the Transaction
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2.1 IBM Software Servers 2.1.1 Lotu
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2.2.1 CICS Clients V1.1.0 A Transac
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2.2.4 CICS Internet Gateway for AIX
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3.1 Services CICS for AIX is a very
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3.1.2 CICS API 24 CICS for AIX as t
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3.1.3.1 Terminal Users and CICS Reg
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3.2 Implementation 3.2.1 Components
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3.2.2 Processes 3.2.1.3 Application
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3.3.1 DCE RPC 3.3.2 TCP/IP 32 CICS
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Figure 9. Interconnection Using Enc
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connect to a PPC Gateway server mac
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Figure 12. Interconnection Using TC
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3.4.3 Configuration 3.4.4 Managing
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3.4.6 Intersystem Communication CIC
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3.4.8 Data Location 44 CICS for AIX
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3.4.11 Operations plan to cope with
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3.5 Summary 48 CICS for AIX as the
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Figure 13. Application Server Model
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4.2.1 CICS External Call Interface
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By means of mapping files, you can
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4.3 Versions 56 CICS for AIX as the
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4.4 Sample Network Configurations 4
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4.5.1 CICS Client for OS/2 60 CICS
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4.5.2 CICS Client for DOS 62 CICS f
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4.5.5 CICS Client for AIX CICS Clie
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4.6 Summary 68 CICS for AIX as the
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5.1.1 DCE Threads 5.1.2 Remote Proc
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The GDS is based on the CCITT X.500
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egion or server it is looking for.
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6.1.2 Encina Toolkit Server Core 6.
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is also necessary to use native AIX
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7.1 X/Open XA Interface 7.1.1 X/Ope
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Communication between the transacti
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7.2.2 Single-Phase and Two-Phase co
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Figure 28. Switching Access among D
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Figure 30. CICS Access to Remote DB
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emote DRDA database. Information ab
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As the COMMAREA has an allowable ma
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