Date: Thu, 15 Jan 2004 09:06:07 +0200 From: Ari Suutari <ari@suutari.iki.fi> To: Karl Pielorz <kpielorz@tdx.co.uk>, freebsd-stable@freebsd.org Subject: Re: Adaptect raid performance with FreeBSD Message-ID: <200401150906.07062.ari@suutari.iki.fi> In-Reply-To: <742320171.1074087760@rainbow> References: <200401141453.50150.ari@suutari.iki.fi> <200401141527.11930.ari@suutari.iki.fi> <742320171.1074087760@rainbow>
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Hi, On Wednesday 14 January 2004 15:42, Karl Pielorz wrote: > --On 14 January 2004 15:27 +0200 Ari Suutari <ari@suutari.iki.fi> wrote: > > Hi, > > > > On Wednesday 14 January 2004 15:20, Karl Pielorz wrote: > >> > So, I get only about 25MB/s. Shouldn't I be getting something > >> > like 70 MB/s, or even more since there are two disks that > >> > can server read requests ? > >> > >> Hmmm, what happens if you run two of those at once? > > > > Running 5 dd's at once gives in iostat: > > > > [snip] > > > > The peak seems to be 39 Mb/s. > > Was that the peak 'each' - or combined? - i.e. what was the combined > throughput for 2 dd's running? When running 2 dd's, each reports abou 17 MB/s. iostat reports 27-33 MB/s during run. Ari S.
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