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- Newsgroups: comp.os.vms
- Path: sparky!uunet!caen!batcomputer!vger.cheme.cornell.edu!OLIN
- From: olin@vger.cheme.cornell.edu (Steve Thompson)
- Subject: Re: ?Why does this backup go so slow?
- Message-ID: <1992Nov17.165409.1359@tc.cornell.edu>
- Sender: news@tc.cornell.edu
- Nntp-Posting-Host: vger.cheme.cornell.edu
- Reply-To: olin@vger.cheme.cornell.edu
- Organization: Chemical Engineering, Cornell University, NY
- References: <1992Nov12.124928.1@woods.ulowell.edu>,<1992Nov17.083227.1@ptavv.llnl.gov>
- Date: Tue, 17 Nov 1992 16:54:09 GMT
- Lines: 27
-
- In article <1992Nov17.083227.1@ptavv.llnl.gov>, oberman@ptavv.llnl.gov writes:
- >In article <1992Nov12.124928.1@woods.ulowell.edu>, welchb@woods.ulowell.edu writes:
- >> It took us 4.5 hours to do an image backup of an RA90 (80% full of user
- >> data) onto an RA92? Why does it not go faster? [I had prepared a much
- >> longer version of the question, with so many particulars, that my boss
- >> said to just ask the simple question.]
- >
- >Well, I guess you will have to live with the simple answer (at least from me).
- >
- >BACKUP is more seriously effected by system tuning and user quotas than any
- >application I have seen. My 2.1 GB disk can be backed up to tape in less than
- >4.5 hours.
-
- Ain't this the truth. It depends a lot of course on what processor you
- have, and what tape drive. Back when I was doing backups on an 8250 to
- a TU81, it would take a very long time to back up a disk. Now, I have
- a VAX 4000 model 500 and a TF85 tape drive, and backing up a full RF73
- (that's 2GB) takes about 70 minutes, *with* 20 users logged on.
-
- Steve
-
- ---------------------------------------------------------------------------
- Steve Thompson, System Mangler Internet: thompson@cheme.tn.cornell.edu
- School of Chemical Engineering Bitnet: thompson@crnlchme
- Olin Hall, Cornell University Phone: (607) 255 5573
- Ithaca NY 14853
- ---------------------------------------------------------------------------
-