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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!howland.reston.ans.net!paladin.american.edu!auvm!ETSU.BITNET!CMS2
- Return-Path: <@VM1.CC.UAKRON.EDU:CMS2@ETSU.BITNET>
- Message-ID: <L-VMCTR%93011116022707@VM1.CC.UAKRON.EDU>
- Newsgroups: bit.listserv.l-vmctr
- Date: Mon, 11 Jan 1993 15:41:53 EST
- Sender: VMCENTER Components Discussion List <L-VMCTR@AKRONVM.BITNET>
- From: Bill Williams <CMS2@ETSU.BITNET>
- Organization: East Tennessee State University
- Subject: Re: VMarchive dasd crash
- In-Reply-To: Message of Sat, 9 Jan 1993 03:57:06 GMT from <STAN@VM.TEMPLE.EDU>
- Lines: 44
-
- On Sat, 9 Jan 1993 03:57:06 GMT Stan Horwitz said:
- >...stuff deleted... exactly how much
- >trouble will we be in if this catalog file become corrupt or destroyed?
- >
- >The archived files will be fine (in this scenerio), but we won't have a
- >record of what's there. We definitely need a backup procedure for the
- >master VMArchive catalog file. ...
- > ... What I want to know is if there is anyway of backing up this
- >single file perhaps hourly to another disk file just in case the original
- >goes bad. This way, all we'l lose is an hour's archiving activity. Could
- >we just schedule a vmschedule job to kick in every hour and do this backup.
- >I was told this wouldn't work, but it seems like a good idea to me.
-
- There are several pros/cons here depending upon the size of this catalog
- data. Don't forget your STAGE and ONLINE areas, too!. How about this:
-
- When you get ready for your hourly SUBMIT ARCHIVES you also follow
- through with a VMBACKUP to the VMARCH MDisks which contain the VMArchive
- data -- catalog, ONLINE, and with proper POST, etc. your STAGE could
- catch anything which might be incoming during your SUB ARCHIVEs.
-
- The drawback is whether VMARCH will be unavailable during the VMBACKUP
- QUIESCE for an unacceptable period of time. Also, this will be no good
- if VMBACKUP takes an hour to back up VMARCHIVE! :-)
-
- If this idea doesn't work, you can also have a duplicate MDisks defined
- -- the same sizes but on a different HDA -- for the critical VMARCH
- MDisks, and have some special userid set up (preferrably OWNING the
- duplicate MDIsks) which you VMSchedule to come up with links to the REAL
- Mdisks and DDR them once an hour.
-
- Both these ideas have holes, but as I hope to imply -- they are just
- *IDEAS* and not intended to represent a cookbook.
-
- My *best* suggestion is to call SCI Tech Support and ask them!
-
- I, too, am curious as to how other sites handle this situation.
-
- ---------------------------------------
- Bill Williams -- ETSU Systems Support
- East
- Tennessee (615) 929-6853
- State
- University <CMS2@ETSU.BITNET>
-