Hi Eric - Our SOP is that we mirror everything locally for DR. Once a day, we break the link and back all the offline volumes up to tape.
Doing every volume just makes the restore process at DR much simpler - once the restore process is done, we ipl - no additonal steps like page packs to set up, spool volumes to initialize, whatever. We're backing up over 4,000 addresses - a lot of which are mod-27's. So even if we had 100 page packs (mod-3's), it's not a real significant portion of the backup or restore and isn't seen to be a big enough impact to change the procedure. If the performance hit is small, there's no justification to changing the process. But if it's significant... //////////////////////////// What would you do with a mirrored page pack if your system crashed? I don't think you could use it for anything. I know there are others out there who have a more definitive answer, but I can't see much use for it. Eric ---- Darth Keller <[EMAIL PROTECTED]> wrote: > So the general consensus seems to be that mirroring page packs is a bad > idea resulting in a performance hit. Does anyone have any #'s on how much > of a hit this is? > ddk ************************************************************************************** This e-mail message and all attachments transmitted with it may contain legally privileged and/or confidential information intended solely for the use of the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, forwarding or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message and all copies and backups thereof. Thank you. ************************************************************************************** ---------------------------------------------------------------------- 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
