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From: frank@dvm.UUCP
Newsgroups: comp.unix.wizards
Subject: Backups on Live Systems
Message-ID: <132@dvm.UUCP>
Date: Wed, 27-May-87 09:57:29 EDT
Article-I.D.: dvm.132
Posted: Wed May 27 09:57:29 1987
Date-Received: Sat, 30-May-87 06:20:47 EDT
Reply-To: frank@dvm.UUCP (Frank Wortner)
Organization: Philon, Inc. (NY, NY)
Lines: 24
Keywords: backup, dump, filesystem

I have a problem.

I am system administrator for an Alliant FX-8 running Concentrix 2.0 (based
on 4.2 BSD).  There are a number of large jobs here that need to run 24 hours
a day.  This means that the system cannot be taken down for nightly backups.
However, the powers that be feel (justifiably) that daily incremental backups
are a good idea.  How much am I risking if I try to dump a "live" filesystem?

If dumping a live filesystem -- one that is mounted with the machine running
in multiuser mode -- is a bad idea, is there any good way to suspend user
processes until the backup is over?

If anyone has any ideas, thoughts, or (preferably) experience they can share,
I'd really love to hear it.  Please send replies via mail;  I don't get many
chances to read news.  I will summarize and post useful/interesting responses
in about 2 weeks.

Many Thanks.

this system
any offi
-- 
				Frank
				...!inhp4!allegra!phri!orville!dvm!frank