This course enables Systems Programmers and Systems Administrators to gain a clear and true grasp of CICS architecture from the ground up. By understanding the Kernel, the Dispatcher, the Transaction Manager and the Application Domains, not only do all of the subsequent components fall into place, but also the fundamentals for Debugging, Performance Tuning and Application Design begin to become a reality. There are two modules in the 'Architecture Series' and it is recommended that they be taken in order. Parts 1 & 2 may be run consecutively or with a consolidation gap between them.<br><br>This course is available for one-company, on-site presentations and for live presentation over the Internet, via the Virtual Classroom Environment service.
The Domain structure of CICS/TS, how domains are initialised/terminated and how they collaborate with each other.
Kernel DomainTasentries; KE Stack storage; Domain Gate Table; KE PUSH/POP; Runaway; Kernel Linkage and Kernel Error management.
Dispatcher DomainDefault Task; Suspend/Resume; Post Exit mechanism; Dispatchable chains; Hand Post mechanism; ICV; PRTYAGE mechanism; DTAs and DSTCBs; practical session.
Transaction Manager DomainAttach/detach processing; maximum tasks (MXT) and Tranclass processing; control blocks: XM anchor XMTxn.
Application DomainCSA and OPFL; System and User Task Control Areas; the EXEC Interface block; finding the high level language save area for non-LE programs; using the LE dynamic save area and common anchor block for LE conforming programs.
Enqueue DomainENQMODELS enhancements to CICS for local and system wide locking. How to identify ENQ problems using dumps and on-line techniques. ENQ pools and NQEA control blocks.
File ControlElimination of exclusive control deadlocks and impact on performance incl. CILOCK=NO/YES; changes to local/remote test for function shipping; changes to user exits; use of Coupling facility data tables; RLS and non-RLS files; Record Level Sharing without a CF; practical session.
Loader DomainPrograms; Mapsets; Loader Functionality; Program Status; Control blocks: LD anchor, APEs, and CPEs and RPS.
Program Manager DomainProgram Logical levels and environment save areas; load list elements; control blocks: PPTEs, PLCBs, PESAs. COMMAREA limit circumvention via Channels & Containers, example of use, channel scope and internal blocks.
Language EnvironmentUsing CEECOPT, CEEROPT and the CLER transaction to manage storage and debugging options; using LE process, enclave and thread blocks to debug applications; using the LE traceback report; understanding SIT parameters AUTODST and RUWAPOOL.
Debugging Transaction DumpsASRAs; AICAs; Dynamic call and Program LINKs; Practical.
CICS/Db2 InterfaceUsing the Db2 control blocks to find SQL statements and solve problems; control blocks: D2GLB, D2CSB, D2LOT, D2ENT and D2TRN.
Join our public courses in our Ireland facilities. Private class trainings will be organized at the location of your preference, according to your schedule.