----- Original Message -----
From: "Thompson, Steve , SCI TW" <[EMAIL PROTECTED]>
Newsgroups: bit.listserv.ibm-main
Sent: Thursday, January 04, 2007 6:39 PM
Subject: RE: V2X2 vs. Shark (SnapShot v. FlashCopy)
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED]
Behalf Of Pinnacle
Sent: Thursday, January 04, 2007 5:28 PM
To: IBM-MAIN@BAMA.UA.EDU
Subject: V2X2 vs. Shark (SnapShot v. FlashCopy)
My current client has a V2X2 and is thinking about replacing it with a
Shark. SnapShot is used to snap 600 volumes in about 5-10 minutes. The
physical tape backups are done from the snaps and take about 8 hours.
This
DR process is fully tested and works great. My main concern if we
replace
the V2X2 with the Shark is the DR process. Has FlashCopy improved to
the
point that you can make a point in time backup and physically move it to
tape later? And can you FlashCopy the entire box in a few minutes? If
not,
the DR process for this client is going to get much more complicated.
PPRC
or XRC are not options due to cost. Let me know your thoughts.
<snip>
What you describe is exactly what I did for a client in Columbus OH.
They had a Shark for their mainframe. We flashed as soon as the batch
cycle ended and then did the full volume copies to tape (2 copies) (one
for on site and one for offsite). As I recall, Backups of the flash
copies started between 5a-6a and finished by 9AM. 3390-3s and 3490 with
"oreos". I've forgotten how many 3490 units and how many DASD units.
Oh yeah, and D/R tests worked the first time, every time.
Steve,
Over what period of time were the volumes FlashCopy'd? My understanding is
that DFDSS front-ends the FlashCopy function, so you only get the FlashCopy
just before DFDSS can do the physical backup to tape. Can you batch all the
FlashCopy's, then copy them to tape later? It's very important to keep the
time window when the volumes are actually copied as small as possible.
Regards,
Tom Conley
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