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| Dual logging vs. Single logging on z/OS |
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| JAdams |
 Posted: Fri Nov 14, 2003 12:56 pm Post subject: Dual logging vs. Single logging on z/OS |
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Apprentice
Joined: 11 Jul 2002
Posts: 47
Location: Lakeland, FL
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I am considering the switch from dual to single logging in my z/OS environment. Reason being is that we are using a ton of tapes and could cut them in half. Just wondering if anybody else is using single logging in their z/OS?
Thanks!
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Jason Adams
IBM Certified Specialist MQSeries |
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| oz1ccg |
| Posted: Sun Nov 16, 2003 5:29 am Post subject: |
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Yatiri
Joined: 10 Feb 2002
Posts: 628
Location: Denmark
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Well, that's a tricky question. 
From my point of view I'll say, it depends on your requirements, because can you afford to loose them ??
Lets say you have a bad DASD or "tape" in your VTS ??
Today enverybody is using GDPS together with synchronous mirroing, and dual sites, yes ??.
Definitely not (this is for the big ones only), so the small sites will have to consider placing the logs, archives, and BSDS on physical different volumes to be shure not to lose any data.
I had a chrash 2-3 yrs back, it was a ESCON-director that gave up, so my BSDS get out of sync, and after restart of MQ, it said, "help me I have a problem"... After some RYFM, and copying data arround, we got airborn again.
My personal recomendation would be keep to copies when your data is vital for your company. Otherwise discuss it with you auditors.... I also don't think that your DBAs would rely on one DB2 log only 
Just my $0.02 
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Regards, Jørgen
Home of BlockIP2, the last free MQ Security exit ver. 3.00
Cert. on WMQ, WBIMB, SWIFT. |
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