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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!MSU.BITNET!19277MAK
- Message-ID: <L-VMCTR%92112311520577@VM1.CC.UAKRON.EDU>
- Newsgroups: bit.listserv.l-vmctr
- Date: Mon, 23 Nov 1992 11:09:21 EST
- Sender: VMCENTER Components Discussion List <L-VMCTR@AKRONVM.BITNET>
- From: Margaret King <19277MAK@MSU.BITNET>
- Subject: Re: Is anyone doing VM/Archive disaster recovery?
- In-Reply-To: Message of Mon, 23 Nov 1992 09:49:10 -0500 from <MBDMD@ROHVM1>
- Lines: 34
-
- >1) Nobody on this list in interested in this topic. I find this hard
- ....
- >2) Nobody is providing disaster recovery for VM/Archive. Based on
- ....
- >Which one is it?
-
- At our site we are not taking Archive twins offsite. It would be a good
- thing to do someday but we will probably never take them offsite every day.
- We currently have a scheme where we close tapes every three days and then
- Merge/Purge them together, in order to optimize tape usage - our VMARCH
- usage is so variable that we couldn't figure out a good DSSLIMIT (to avoid
- both nearly-empty tapes and continuation reels) any other way. It took a
- while to get that set up and we are still fine-tuning it. I suppose we
- might be able to work offsite twins into this scheme but I agree that the
- product is not exactly designed for that. If you are going to start doing
- routine Merge/Purges for combining tapes, bear in mind that it wants an
- expired file in the set somewhere or it won't change the database. At least
- that's how it worked when we set up our Merge/Purge scheme, and we have a
- VMSCHEDULE job that archives dummy files with very short retention periods
- just to take care of this.
-
- You said they told you to mark the twins missing. I don't know if it is
- related, but it reminds me of the situation where we had to set up VMBACKUP
- to only do one recall at once so that it would not wind up insisting that
- a (vaulted) VMBACKUP twin tape be mounted. I think it would be nice if
- Systems Center would have configuration options in VMBACKUP and VMARCHIVE to
- say "Don't call for twins on recalls until further notice".
-
- We have heard that they are reworking VMARCHIVE so we are waiting to see what
- the next one looks like. VMBACKUP 5.1 was certainly a world apart from
- VMBACKUP 4.2.
-
- Margaret King
- Michigan State University
-