My heartfelt advice on OFFLOAD is *not* to use it if RELOAD is your final
goal. I've heard of several career-threatening OFFLOAD adventures over the
years in what amounts to WRITE-ONCE-READ-NEVER. It's not really the fault
of the function itself, but you can easily fall into depths of confusion.
In my experience, OFFLOAD/RELOAD takes 'difficult' to a new plateau.
When we moved from Mod-3 volumes to Mod-9 not long ago, the process was
fairly simple if somewhat leisurely:
1. Ensure adequate resources for a larger spool. You can do this
dynamically with nondisruptive commands. Even if you have to enlarge your
checkpoint, you can do it via the Reconfiguration Dialog.
2. Make sure you have LARGEDS=ALLOWED on SPOOLDEF. This is also dynamic.
3. Add as many Mod-9 volumes as needed to hold your expected quantity of
spool data.
4. Start and format the new volumes.
5. Put the old volumes in DRAIN status.
6. Wait for the old volumes to actually drain. You will need one IPL across
the MAS, but you can IPL one system at a time at any comfortable pace.
7. Some old data will go away naturally: printed, transmitted to another
node, aged off by class, etc.
8. There will always be some data at the end that you have to purge
manually because no one wants it. We found years-old (!) jobs that somehow
never had purged. Once the last job on a spool volume is gone, the volume
goes drained and can be varied offline.
This process takes longer in theory than OFFLOAD/RELOAD, but in practice is
quicker than finding a new job. ;-)
.
.
JO.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
626-302-7535 Office
323-715-0595 Mobile
[EMAIL PROTECTED]
Angel Tamayo
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<[EMAIL PROTECTED] Subject
.EDU> Offload Process to change dasd
types for spool
04/15/2008 04:32
PM
Please respond to
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<[EMAIL PROTECTED]
.EDU>
Hi guys,
I am embarking on the task of to develop OFFLOAD, in order to make easy the
process of change dasd types for spool (type 3 to type 9). Actually we are
doing it by draining volumes, and replacing them as they drain, but it's
becoming increasingly difficult, and time consuming.
Someone can say me if already did successfully this task and tell me the
followed process?. Also might be useful some instructive to execute
OFFLOAD's process towards volume.
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