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Date:      Sun, 22 Feb 1998 02:05:19 -0500
From:      Norman C Rice <nrice@emu.sourcee.com>
To:        don@partsnow.com
Cc:        John Kelly <jak@cetlink.net>, questions@FreeBSD.ORG
Subject:   Re: Data mirroring, how to do it?
Message-ID:  <19980222020519.61033@emu.sourcee.com>
In-Reply-To: <34EF4118.FAEB325D@partsnow.com>; from Don Wilde on Sat, Feb 21, 1998 at 01:03:20PM -0800
References:  <3.0.32.19980221134414.0072902c@lda> <34EEF85F.EBFB2217@partsnow.com> <34f12c11.1850917@mail.cetlink.net> <34EF4118.FAEB325D@partsnow.com>

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On Sat, Feb 21, 1998 at 01:03:20PM -0800, Don Wilde wrote:
> John Kelly wrote:
> > 
> > On Sat, 21 Feb 1998 07:53:03 -0800, Don Wilde <don@partsnow.com>
> > wrote:
> > 
> > >If you add a pair of 100-base-T cards to your pair of servers, you can
> > >do hourly backups using CVSup or simple scripts from one to the other on
> > >their own little private net connection.
> > 
> > I too need a dual-system, hot-backup type of mirroring solution.
> > 
> > But won't CVSup be a big performance drag when running hourly?
> 
> niceness (task priority) is your friend... :)

But, too much ``niceness'' can result in collisions, e.g., the last hour's
CVSup may not complete in time.

I have used rdist for mirroring with a fair amount of success. I found it
necessary to run several tasks in parallel to tune the performance due
to the number of files being mirrored.

-- 
Regards,
Norman C. Rice, Jr.

> -- 
>   oooOOO O O O o * * *  *   *   *
>  o     ___       _________ _________ ________ _________ _________ ___==_
>  V_=_=_DW ===--- Don Wilde [don@PartsNow.com] [http://www.PartsNow.com ]
> /oo0000oo-oo--oo-ooo---ooo-ooo---ooo-ooo--ooo-ooo---ooo-ooo---ooo-oo--oo
> 
> 
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