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Date:      Mon, 22 Jul 2002 12:50:19 -0700 (PDT)
From:      Jean-Marc Zucconi <jmz@FreeBSD.ORG>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Andreas Koch <koch@eis.cs.tu-bs.de>, freebsd-stable@FreeBSD.ORG
Subject:   Re: 4.6-RC: Glacial speed of dump backups
Message-ID:  <200207221950.g6MJoJSH080255@freefall.freebsd.org>
In-Reply-To: <200207221943.g6MJhIBX054785@apollo.backplane.com>
References:  <20020606204948.GA4540@ultra4.eis.cs.tu-bs.de> <20020722081614.E367@gsmx07.alcatel.com.au> <20020722100408.GP26095@ultra4.eis.cs.tu-bs.de> <200207221943.g6MJhIBX054785@apollo.backplane.com>

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>>>>> Matthew Dillon writes:

 >     Here are the preliminary results when I test this dumping /usr
 >     to /dev/null:

 >  DUMP: finished in 140 seconds, throughput 6413 KBytes/sec	(8 MB cache)
 >  DUMP: finished in 144 seconds, throughput 6235 KBytes/sec	(4 MB cache)
 >  DUMP: finished in 234 seconds, throughput 3836 KBytes/sec	(0 MB cache)

I also got a factor ~2 of in speed for a fs with a lot of inodes
(~ncvs) and no significant difference on /

Jean-Marc

-- 
Jean-Marc Zucconi -- PGP Key: finger jmz@FreeBSD.org [KeyID: 400B38E9]

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