March 2003
Intermediate to advanced
282 pages
9h 13m
English
book
IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
by Jouko Jantti, Juan Jesœs Iniesta Mart’nez, Knut Kubein, Bill Stillwell, Gary Wicks
Content preview from IMS in the Parallel Sysplex Volume I: Reviewing the IMSplex Technology
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Chapter 2. Introducing IMS data sharing 35
Figure 2-1 Components of data sharing environments
2.2.1 IMS data sharing subsystems
The IMS images in a single Parallel Sysplex are known collectively as a
data sharing group
.
The group may consist of any combination of these IMS subsystems:
IMS TM control regions
IMS DB control (DBCTL) regions
IMS batch jobs
Each of these tasks reflects one IMS image in the Parallel Sysplex since each controls its own
local database buffer pool. Each batch job fills one of the 255 available data sharing slots,
whereas one IMS TM or one DB control region and all BMPs under its control also fill one
slot. This 255 connection ...
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