-----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Pinnacle Sent: Thursday, January 04, 2007 10:56 PM To: IBM-MAIN@BAMA.UA.EDU Subject: Re: V2X2 vs. Shark (SnapShot v. FlashCopy)
<SNIP> 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. <SNIP> It has been about 4 years since I was involved with that process. As I recall, from the time the flashcopy jobs started to the time they were all completed was about 10 minutes (we did not flash all the volumes at once, automation submitted the flash jobs so many seconds/minutes apart). Batch jobs were complete at that point (except for incremental backups). As soon as the flashcopy jobs completed, on-lines (CICS) could become active (the files were closed/disabled in CICS terms) and TSO max users was changed from 0. The jobs were then started to backup the flashed volumes. Later, Steve Thompson ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
