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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118 IMS in the Parallel Sysplex, Volume I: Reviewing the IMSplex Technology
To prevent a log-full condition, which is where the number of log data sets has reached the
limit or there is no more DASD space for the allocation of log data sets, regularly initiate a
structure checkpoint. A structure checkpoint reduces the time it takes to perform a structure
recovery if required.
CQS performs structure checkpoints in the following situations:
When the log stream approaches a full status
After a successful structure rebuild (unless it was a structure copy initiated by an operator)
After a successful overflow threshold process
After the /CQCHKPT ...
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