July 2003
Intermediate to advanced
206 pages
7h 41m
English
book
IMS in the Parallel Sysplex Volume II: Planning the IMSplex
by Jouko Jantti, Bill Stillwell, Gary Wicks
Content preview from IMS in the Parallel Sysplex Volume II: Planning the IMSplex
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Chapter 3. Planning for block level data sharing 59
Each IRLM in the data sharing group must connect to the same lock structure. The lock
structure contains information about what locks have been requested by each IRLM, and
which locks are protecting potential updates. There can be a maximum of 32 connectors
to a lock structure.
Fast Database Recovery (FDBR)
Shown on the diagram as a dotted line box are
optional address spaces called Fast
Database Recovery regions. Each FDBR address space is associated with one IMS
control region and monitors that IMS for failure - either an IMS abend or a system failure. If
there is a failure, then FDBR perf ...
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