Hello Larry,
I kept hearing those types of numbers. I am very pleasantly
surprised.
Ed Martin
330-588-4723
ext 40441
________________________________
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Macioce, Larry
Sent: Wednesday, July 16, 2008 10:06 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: FLASHCOPY performance to a DS6800 DASD
I can't help you with the flashcopy question, but I can tell you our
dfdss full backups(3390-3) went from 20-25 min to 6-7 min when we
changed out to the ds6k.
No one could believe it
________________________________
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Edward M. Martin
Sent: Wednesday, July 16, 2008 10:00 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: FLASHCOPY performance to a DS6800 DASD
Hello Everyone,
I need some confirmation. I am just amazed at the performance of
the DS6800
I just did the z/VM command FLASHCOPY on a 3390-mod 9 on DS6800 to
another 3390-mod 9 volume on the DS6800.
FLASHCOPY 8A2 0 END TO 8A1 0 END SYNCHRONOUS
The command responded instantaneously.
SYNChronous
tells CP to process the command immediately and does not allow you
to
enter any other commands until the hardware has accepted all
parameters,
all messages from the Enterprise Storage Server (ESS) subsystem have
been
processed, and the FLASHCOPY command completes.
Is the DS6800 and the FLASHCOPY really that fast or is there something
going on behind the
scenes?
Performance has been pretty unbelievable but the FLASHCOPY was just too
fast.
Example Our Batch cycle at night use to take 5-5.5 hours. Started at
midnight and
Completeed around 5:30 am.
Old system EMC SYMETRIC 8 gig of cache and 6 ESCON connections.
SWITCH to DS6800.
DS6800 2 gig of cache with 4 FICON connections.
Batch cycle dropped by 1 hour without any other changes. Start at
midnight and completes
around 4-4:30 am.
Ed Martin
330-588-4723
ext 40441
________________________________
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