Date: Wed, 28 Mar 2007 14:02:16 +0200 From: Ivan Voras <ivoras@fer.hr> To: freebsd-geom@freebsd.org Subject: Re: raid3 is slow Message-ID: <eudlg8$pm4$1@sea.gmane.org> In-Reply-To: <003401c7712a$f71ebb60$6502a8c0@peteruj>
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[-- Attachment #1 --] Szabó Péter wrote: > I have a raid3 setup with 5 consumers. it seems everything is all right, but riad is very slow imho, but i don't have any reference. You need to give more accurate information. What are the "consumers" you mention? Maybe you mean the disks/components of the RAID? > Now i copy from raid3 to a single hdd 75GB data. Nothing else run, except ssh, and ftp. Before the copy my load is 0.1, after i star the copy the load is 2.92 or higher, and the machine is very slow. I think this is not normal, or is it? Copy how? By "cp" from shell? > My config is: > AMD Barton 2500+ with 1GB memory. > > I stop the copy, load is 0.05, and start again, after a few seconds load is 2.02. Due to the way raid3 works, it's by definition more CPU-intensive than most other RAID levels, but it shouldn't be even remotely slow as that. Also, since your load is > 2, what are the other CPU intensive tasks? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGCllIldnAQVacBcgRAsoSAKCREdqq6y5w3iXlHbyz/P1JofRpQACfUyQL tWYzgdzFK/imqQNDmY9ZhzI= =oLcw -----END PGP SIGNATURE-----help
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