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11.2 User Access 160 CICS for AIX as the Transaction Server Zooming in to sector 1 of TDJ′s OLTP complex (see Figure 43 on page 161), you can see the network connections that link the end users′ desktop PCs and workstations to CICS for AIX region CICKAR1. This region serves the business needs within the Kangaroo Leisure Group. A significant number of CICS users have access to this region through the cicsterm or cicsteld facilities provided by the CICS Client for AIX. These cicsterm and cicsteld processes run in separate RISC System/6000 machines other than the server machine where the CICS for AIX region resides. Such an approach prevents the overloading of the server machine with these processes and enables CICKAR1 to deliver good transaction response times and throughput. All end users have to authenticate to DCE before signing on to CICS and use the CESN transaction before they can initiate other CICS transactions. This authentication helps to enforce a more secure environment. A small travel agency affiliated with Kangaroo Travel uses a SunSPARC Server system with the CICS Client for Sun Systems product to access CICS for AIX region CICKAR1. Thus the agency has the same level of information that is available to Kangaroo Travel staff and at the same time can provide good service to their clients and remain competitive. A variety of PCs on local token-ring LANs connect to the RISC System/6000 system running CICS for AIX region CICK AR1. The connections are made through a gateway to the SNA adapter of the RISC System/6000 system or directly to the token-ring adapter of the RISC System/6000 system. With the appropriate version of CICS Client installed on the respective platforms, the end users of these PCs access the CICKAR1 region and can execute transactions. The appropriate LD has been created in CICKAR1 to support the communication from these CICS clients. CICS for AIX region CICKAR1 is connected to CICS/ESA region CICHQ12 through CICS ISC so that a CICS transaction running in CICKAR1 can access the legacy data stored centrally in the mainframe computer.
Figure 43. Accessing CICS Applications through CICS Clients 11.3 Databases TDJ′s OLTP complex makes extensive use of DB2 databases. Figure 44 on page 162 shows the databases that are accessible from CICS for AIX region CICKAR8. Chapter 11. TDJ Enterprise International Limited 161
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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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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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