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| Backup on z/OS |
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| mgrabinski |
 Posted: Thu Aug 28, 2003 6:06 am Post subject: Backup on z/OS |
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Master
Joined: 16 Oct 2001
Posts: 246
Location: Katowice, Poland
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Hi mainframers,
Can you share your thoughts/experience/remarks on backuping MQ on z/OS?
My concern are page sets. Currently I use HSM to achive them every night (it's fuzzy backup - I can't stop the managers). But due to the volume of page sets (there are 6 managers, each having a dozen page sets, 50 000 TRKS each), the archive process is quite long. I was thinking of ways to make it shorter.
HSM backups all formatted pages, this is overhead since not every page contains data, so I thought of using the COPY function of CSQUTIL to copy only pages that actually contain messages. It is much quicker and the volume of the archive shrinks greatly, but the function doesn't work for queues currently open. And stopping all activity is out of question.
How do you deal with backup of page sets?
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Marcin Grabinski <>< |
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| oz1ccg |
| Posted: Mon Sep 01, 2003 11:04 am Post subject: |
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Yatiri
Joined: 10 Feb 2002
Posts: 628
Location: Denmark
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Hi, what about using ADRDSSU (used as mover for HSM), and the dump the PSID, logs and BSDS when the time is right for you, maybee in parallel to STRIPED DASD ??
Have you calculated how log time it takes you to recover the queue manager reading logs .... Maybee it's time to jump on fuzzy backup every xx hours....
The essential part of fuzzy-backup is to backup from start to end, to preserve the RBA index of the dataset, it SHALL be taken first !!!
Just my $0.02 
_________________
Regards, Jørgen
Home of BlockIP2, the last free MQ Security exit ver. 3.00
Cert. on WMQ, WBIMB, SWIFT. |
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| spellman |
| Posted: Tue Sep 16, 2003 5:33 pm Post subject: |
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Newbie
Joined: 17 Jun 2002
Posts: 3
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| oz1ccg |
| Posted: Sun Sep 21, 2003 5:30 am Post subject: |
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Yatiri
Joined: 10 Feb 2002
Posts: 628
Location: Denmark
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Be aware of the way you're doing the FLASH-copy or whatever it's called, what is very mandatory to backup (while running), is to backup the start of the DSN (with RBA and pointers), before the rest of DSN.
This gives some challanges (especially when dealing with multivolume DSN), you'll have to know how the DSAD is organized, how the extemsions are placed etc.
I saw some info on this on the WebSphere tech. conference....
This was the main reason why I didn't mention the hardware backup way, another is using mirroring technologi....
Just my $0.02
_________________
Regards, Jørgen
Home of BlockIP2, the last free MQ Security exit ver. 3.00
Cert. on WMQ, WBIMB, SWIFT. |
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