Hello and Thanks to everyone,
I have been to the lectures and read the literature. I was just
amazed at the performance.
Question (because I am Systems), what happens to the copy
process if power is interrupted?
And how do I know when the copy function is actually completed?
Ed Martin
330-588-4723
ext 40441
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Bob Levad (641-585-6770)
Sent: Wednesday, July 16, 2008 10:36 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: FLASHCOPY performance to a DS6800 DASD
Ed,
I'm sure I'll be corrected if my understanding is in error.
The FLASHCOPY proceeds in the background, but the source is available
for use immediately as writes to un-copied portions of the source volume
are logged and held until the flashcopy completes.
Also, reads of uncopied areas of the destination volume pull from the
original, as yet unchanged, volume.
Once the copy is complete, the logged updates are applied to the source
volume.
On our DS8100, we flashcopy about 60 VSE volumes each night (waiting 3
seconds between commands) and then immediately bring up our production
system. We then immediately start VMBACKUP to grab a full DR copy from
the destination volumes.
Our production VSE is IPL'd usually within 5 minutes of shutdown.
Bob
ntents of this electronically transmitted information is strictly
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