From: Shelton, Darren (Darren.Shelton_at_acs-inc.com)
Date: Mon Aug 06 2007 - 20:03:56 CEST
Message-ID: <EBCF66E637DC3542AE60A47E25E7ABD305045B27@dalexmb03.exchange.acsad.acs-inc.com> From: "Shelton, Darren" <Darren.Shelton@acs-inc.com> Date: Mon, 6 Aug 2007 13:03:56 -0500 Subject: RE: [suse-sles-e] Slow direct I/O performance SLES 10 SP1
testserver:~ # dd oflag=direct if=/dev/zero of=data.out bs=4k count=10000
10000+0 records in
10000+0 records out
40960000 bytes (41 MB) copied, 1.77092 seconds, 23.1 MB/s
IBM e346, Raid 5 SCSI - 3 10k's
darren
>> -----Original Message-----
>> From: Gordon Ross [mailto:G.Ross@ccw.gov.uk]
>> Sent: Monday, August 06, 2007 12:57 PM
>> To: suse-sles-e@suse.com
>> Subject: Re: [suse-sles-e] Slow direct I/O performance SLES 10 SP1
>>
>> >>> On 06 August 2007 at 18:52, in message
>> <000601c7d852$83037bf0$14a8a8c0@brain>,
>> "Andreas Mock" <Andreas.Mock@web.de> wrote:
>> >> -----Ursprüngliche Nachricht-----
>> >> Von: suse-sles-e-return-4272-andreas.mock=web.de@suse.com
>> >>
>> >> dd oflag=direct if=/dev/zero of=data.out bs=4k count=500000
>> >>
>> >
>> >
>> > Hi all,
>> >
>> > really nobody out there who coud perform this simple
>> > test with SPLES 10 SP1 on a local filesystem?
>> >
>> > dd oflag=direct if=/dev/zero of=data.out bs=4k count=10000
>> >
>> > I'm interested in the average throughput and the related hardware.
>>
>> hq-hls3:~ # dd oflag=direct if=/dev/zero of=data.out bs=4k count=10000
>> 10000+0 records in
>> 10000+0 records out
>> 40960000 bytes (41 MB) copied, 0.88554 seconds, 46.3 MB/s
>>
>> HP DL385G2 on internal HD controller. (SATA discs)
>>
>>
>>
>> hq-hls1:~ # dd oflag=direct if=/dev/zero of=data.out bs=4k count=10000
>> 10000+0 records in
>> 10000+0 records out
>> 40960000 bytes (41 MB) copied, 41.4103 seconds, 989 kB/s
>>
>> HP DL385 on internal HD controller (SCSI HDs)
>>
>> GTG
>>
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