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

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By means of mapping files, you can customize the client emulator′s screen color attributes and keyboard settings. Thus your users can tailor their workstations to their own preferences or comply with company-standard keyboard layouts. For the CICS for AIX servers (see Table 4 on page 57) the terminals are autoinstalled; that is, you do not have to predefine the terminals to the CICS server. You can start the CICS 3270 emulator session by issuing the cicsterm command at the command input line. cicsterm is a 3270 terminal emulator that is designed specifically to work well with CICS. cicsterm performs terminal emulation and is responsible for displaying the 3270 data on the screen. The CICS Client for AIX and CICS Client for Sun Systems provide another facility called cicsteld that allows connections to a CICS for AIX region using a generic 3270 Telnet client. You can use the particular 3270 terminal emulator of your choice at the client machine. This 3270 terminal emulator works as a Telnet client. It receives your input (through the keyboard) and communicates with cicsteld, which acts as a Telnet server on a destination machine. Then cicsteld communicates with the CICS for AIX region. cicsteld performs no 3270 emulation. It converts data into the 3270 Telnet protocol (EBCDIC 3270 data) and sends it to the Telnet client for display. Figure 17 shows how a CICS for AIX region is accessed by a variety of clients. The CICS Telnet server (cicsteld) can reside in the same host as the CICS for AIX region. Figure 17. Relationship between Terminal Users and CICS for AIX Regions 54 CICS for AIX as the Transaction Server
4.2.4 CICS 3270 Client Printer Support Client printer support is the ability to define a printer terminal on the client workstation. This support enables CICS applications running on the server to direct output to the client-attached printer. CICS 3270 client printer support uses CICS 3270 emulation functions. You can direct the output to a physical printer attached, for example, to the LPT1 port, or you can specify a command to process the data into a format suitable for special-purpose printers. With the CICS Client for AIX or CICS Client for Sun Systems, you can start the CICS 3270 Client printer support by using the cicstermp command. The cicstermp command performs a fixed-size printer emulation of 64 lines by 132 columns and ignores print attributes such as highlight, underline, high intensity, and color. The CICS 3270 Client printer support is invoked by the cicsprnt command when you use CICS Client for OS/2, CICS Client for DOS, CICS Client for Windows, or CICS Client for Macintosh. 4.2.5 Benefits of Using CICS Clients CICS Clients provide you with many benefits. Here are some of the main benefits: Easy migration CICS Clients enable existing CICS users to move easily and inexpensively into client-server computing in a low-risk way. Inexpensive hardware You can use existing low-function workstation hardware for your CICS Clients to gain access to CICS applications and data on the CICS for AIX servers. Protected investment CICS Clients protect your investment in existing CICS applications designed for use with 3270 devices by enabling the EPI to allow these applications to interface with workstation facilities and productivity aids. Exploit GUIs With the use of CICS Clients, your CICS applications can be optimized by locating the business logic on the server and the presentation logic on the client. Thus the usability and productivity of GUIs are exploited. Concurrent server access A CICS Client can concurrently access multiple CICS applications on multiple CICS for AIX servers. Because client applications can access applications and databases on many servers at the same time, their power is considerably enhanced. CICS users on the supported platform can write new applications that use the client-server application server model. Interface to nonterminal devices CICS Clients with the ECI offer you a convenient method of interfacing a nonterminal device, for example, bar-code readers and image scanners, with CICS for AIX servers. Chapter 4. Using CICS Clients 55
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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
Page 22 and 23: 1.2 Complex OLTP Business Environme
Page 24 and 25: Figure 2. OLTP Complex for XYZ Insu
Page 26 and 27: By using common application program
Page 28 and 29: 1.5 OLTP Market 10 CICS for AIX as
Page 30 and 31: Figure 5. OLTP Market Segmentation
Page 32 and 33: 14 CICS for AIX as the Transaction
Page 34 and 35: 2.1 IBM Software Servers 2.1.1 Lotu
Page 36 and 37: 2.2.1 CICS Clients V1.1.0 A Transac
Page 38 and 39: 2.2.4 CICS Internet Gateway for AIX
Page 40 and 41: 3.1 Services CICS for AIX is a very
Page 42 and 43: 3.1.2 CICS API 24 CICS for AIX as t
Page 44 and 45: 3.1.3.1 Terminal Users and CICS Reg
Page 46 and 47: 3.2 Implementation 3.2.1 Components
Page 48 and 49: 3.2.2 Processes 3.2.1.3 Application
Page 50 and 51: 3.3.1 DCE RPC 3.3.2 TCP/IP 32 CICS
Page 52 and 53: Figure 9. Interconnection Using Enc
Page 54 and 55: connect to a PPC Gateway server mac
Page 56 and 57: Figure 12. Interconnection Using TC
Page 58 and 59: 3.4.3 Configuration 3.4.4 Managing
Page 60 and 61: 3.4.6 Intersystem Communication CIC
Page 62 and 63: 3.4.8 Data Location 44 CICS for AIX
Page 64 and 65: 3.4.11 Operations plan to cope with
Page 66 and 67: 3.5 Summary 48 CICS for AIX as the
Page 68 and 69: Figure 13. Application Server Model
Page 70 and 71: 4.2.1 CICS External Call Interface
Page 74 and 75: 4.3 Versions 56 CICS for AIX as the
Page 76 and 77: 4.4 Sample Network Configurations 4
Page 78 and 79: 4.5.1 CICS Client for OS/2 60 CICS
Page 80 and 81: 4.5.2 CICS Client for DOS 62 CICS f
Page 82 and 83: 4.5.5 CICS Client for AIX CICS Clie
Page 86 and 87: 4.6 Summary 68 CICS for AIX as the
Page 88 and 89: 5.1.1 DCE Threads 5.1.2 Remote Proc
Page 90 and 91: The GDS is based on the CCITT X.500
Page 92 and 93: egion or server it is looking for.
Page 96 and 97: 6.1.2 Encina Toolkit Server Core 6.
Page 100 and 101: is also necessary to use native AIX
Page 104 and 105: 7.1 X/Open XA Interface 7.1.1 X/Ope
Page 108 and 109: Communication between the transacti
Page 112 and 113: 7.2.2 Single-Phase and Two-Phase co
Page 116 and 117: Figure 28. Switching Access among D
Page 120 and 121: 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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7.5 Summary 108 CICS for AIX as the
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110 CICS for AIX as the Transaction
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8.2 Workload Management 112 CICS fo
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8.4.2 System Management Application
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Figure 36. The CICS SM GUI 8.4.6 Di
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Figure 37. CICS SM Component Distri
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Figure 38. Combining Resources 122
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8.5.2 The Reference System 124 CICS
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8.6 Planning Considerations for CIC
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9.1 Some Terminology 9.2 Services 1
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Figure 41. CICS Internet Gateway fo
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9.3.3 Data Integrity The Web was or
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9.3.5 High Availability The drawbac
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or employee records, eavesdropping
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• Type, size, and quantity of rec
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10.3.3 Writing ECI and EPI Applicat
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The ANIMATOR debugging tool enables
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10.8 Summary 154 CICS for AIX as th
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11.1 The Big Picture 158 CICS for A
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11.2 User Access 160 CICS for AIX a
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Figure 44. Access to Various DB2 Da
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takes place over TCP/IP or SNA comm
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provide greater protection in the u
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How Customers Can Get ITSO Redbooks
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design. The process of composing a
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A year later ISC gave SQL formal in
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designing efficient applications 15
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