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

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A year later ISC gave SQL formal international standard status. stored procedures. Facility for storing procedural code associated with relational database management systems (RDBMSs) that enforces its use during any database operation. synchronous. (1) Pertaining to two or more processes that depend on the occurrence of a specific event such as a common timing signal. (2) Occurring with a regular or predictable time relationship. sync point. A logical point in execution of an application program where the changes made to the databases by the program are consistent and complete and can be committed to the database. The output, which has been held up to that point, is sent to its destination, the input is removed from the message queues, and the database updates are made available to other applications. When a program terminates abnormally, CICS recovery and restart facilities do not back out updates made before the last completed sync point. T test. Testing involves checking each individual module built during the implementation phase, then integrating the modules into a single program structure. The program as a whole is then tested to ensure that it performs as designed. thread of control. Inside the X/Open DTP model, the concept that associates resource manager work with the global transaction. Routines in the XA interface that manage the association between a thread of control and transactions must be called from the same thread. transaction. A unit of processing (consisting of one or more application programs) initiated by a single request. A transaction can require the initiation of one or more tasks for its execution. transaction manager. Provides the function to begin, end, commit, and roll back transactions. transaction branch. A part of the work in support of a global transaction for which the transaction manager 182 CICS for AIX as the Transaction Server and the resource manager engage in a commitment protocol coordinated with, but separate from, that for other branches. transaction manager. Provides the function to begin, end, commit, and roll back transactions. transaction monitor. Provides a total environment for transactional applications. In addition to transaction manager functions, provides services to aid development, execution, and operation of transaction applications. transaction processing. A style of computing that supports interactive applications in which requests submitted by users are processed as soon as they are received. Results are returned to the requester in a relatively short period of time. A transaction processing system supervises the sharing of resources for processing multiple transactions at the same time. two-phase commit. For a database, a protocol that is used to ensure uniform transaction commit or abort in a distributed data environment between two or more participants. The protocol consists of two phases: the first to reach a common decision, and the second to implement the decision. TX. Within the DTP model adopted by X/Open, the interface among the application or transaction monitor and the transaction manager. W workstation. A configuration of input/output equipment at which an operator works. A terminal or microcomputer, usually one that is connected to a mainframe or a network, at which a user can perform applications. X XA. Within the DTP model adopted by X/Open, the interface between the transaction manager and resource managers.
List of Abbreviations ACL access control list AID attention identifier AIX Advance Interactive Executive APPC Advanced Program-to-Program Communication API application programming interface BMS basic mapping support CAE client application enabler CDS cell directory service CEDF CICS Execution Diagnostic Facility CGI common gateway interface CICS Customer Control Information System CICS SM CICS System Manager for AIX CWA common work area DB2 DATABASE 2 DCE Distributed Computing Environment DDCS Distributed Database Connection Services DRDA Distributed Relational Database Architecture DSOM Distributed System Object Model DTS distributed time service DUW distributed unit of work ECI external call interface EIB enterprise information base Encina Enterprise Computing in New Age EPI external presentation interface GDS global directory service GUI graphical user interface HTML Hyper Text Makeup Language HTTP Hyper Text Transfer Protocol IBM International Business Machines Corporation ITSO International Technical Support Organization IT information technology LD listener definition LUW logical unit of work MCA message channel agent MQI message queuing interface OFD SFS open file descriptor OLTP online transaction processing OSF Open Software Foundation RDBMS relational database management system RDS remote data service RPC remote procedure call SDA screen design aid SFS Encina Structured File Server SMAppl system management application SPOC single point of control SSI single systems image TPC Transaction Processing Council TPS transactions per second URL uniform resource locator WLMAppl workload management application WWW World Wide Web XAD XA definition © Copyright IBM Corp. 1996 183
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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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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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