October 2006
Intermediate to advanced
160 pages
4h 9m
English
book
DB2 for z/OS: Data Sharing in a Nutshell
by Paolo Bruni, Mark Anders, KyengDong Park, Mark Rader, Judy Ruby-Brown
Content preview from DB2 for z/OS: Data Sharing in a Nutshell
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74 Data Sharing in a Nutshell
4.2.2 Archive log
We recommend archiving to disk. Because the recovery operation may have to
read and merge the logs of several members, the recovery process is optimized
when all log data is on disk.
When the archives are migrated from disk to tape, make sure that the archives
for each member do not end up on the same tape. Two different DB2 subsystems
may call for their archives at the same time period and one of them would have to
wait, or possibly they would deadlock with each other.
If you archive directly to tape devices, make sure that you have enough tape
devices to allocate all members' archive logs at the same time to improve
recovery performance.
4.2.3 Best practices for DB2 logging
We recommend the following ...
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