From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Michael Stiller <ms@2scale.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: howto boost write(2) performance?
Date: Tue, 9 Oct 2007 20:25:34 +1000 [thread overview]
Message-ID: <200710092025.34436.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <1191937817.3641.9.camel@blackberry>
On Tuesday 09 October 2007 23:50, Michael Stiller wrote:
> Hi list,
>
> i'm developing an application (in C) which needs to write about
> 1Gbit/s (125Mb/s) to a disk array attached via U320 SCSI.
> It runs on Dual Core 2 Xeons @2Ghz utilizing kernel 2.6.22.7.
>
> I buffer the data in (currently 4) 400Mb buffers and use write(2) in a
> dedicated thread to write them to the raw disk (no fs).
>
> The write(2) performance is not good enough, the writer threads take to
> much time, and i ask you for ideas, howto to boost the write
> performance.
The kernel really cannot sustain 125MB/s? I assume the disk
array is capable?
Where is the bottleneck? Does it keep all disks busy, or are
the CPUs overloaded?
next prev parent reply other threads:[~2007-10-10 2:57 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-09 13:50 howto boost write(2) performance? Michael Stiller
2007-10-09 10:25 ` Nick Piggin [this message]
2007-10-10 6:26 ` Michael Stiller
2007-10-09 14:19 ` Gustavo Chain
2007-10-09 14:56 ` Andi Kleen
2007-10-09 15:42 ` Boaz Harrosh
2007-10-09 16:26 ` Michael Tokarev
2007-10-11 13:50 ` Michael Stiller
2007-10-17 22:19 ` Bill Davidsen
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