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From: trt@mtuxo.att.com (53190-T.TROMLEY)
Newsgroups: comp.sys.misc,news.sysadmin
Subject: Backups - "Shadowing" info wanted
Message-ID: <4217@mtuxo.att.com>
Date: 24 Feb 89 22:00:37 GMT
Organization: AT&T, Middletown NJ
Lines: 18


   [This question is based on the UNIX(r) System V Rel. 3.1.1 OS.]

I'm looking for a good/quick explanation of this concept "shadowing"
that folks seem to be throwing around lately.  Will this only work
if another duplicate processor is avail. - and idle normally?  Is this
really a practical way to have a "Cadillac" back-up/recovery
procedure?  What about incremental back-ups?  I'm of the opinion that
the project simply is not that crucial to have the system constantly
backed-up (hourly?) in order to have almost a "hot switch" recovery
process.  Ideas?  Suggestions?  I'd appreciate any suggestions or comments
you have.  I believe I still have a copy (somewhere) of an incremental
back-up program, but welcome copies of your programs.

Thanx in advance,

		Tim Tromley
		att!mtuxo!trt