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 5. IMS shared queues 121
5.6.11 System Logger data space
There is one OS/390 System Logger per OS/390 image. Each System Logger maintains a
copy of the log data that it writes to the logging structure in its own logger data space unless
the structure has a staging log data set defined. If a logging structure on a Coupling Facility
needs to be recovered and a staging log data set was not being used, all of the System
Loggers are required to participate because each logger data space has part of the data that
is required to rebuild the log stream in the logging structure.
Figure 5-16 shows both the logger data space (1a) and the staging ...
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