Re: suggestions for postgresql setup on Dell 2950 , PERC6i controller

The URL of the result is

http://98.129.214.99/bonnie/report.html

(sorry if this was a repost)

On Tue, Feb 17, 2009 at 2:04 AM, Rajesh Kumar Mallah
<mallah(dot)rajesh(at)gmail(dot)com> wrote:
> BTW
>
> our Machine got build with 8 15k drives in raid10 ,
> from bonnie++ results its looks like the machine is
> able to do 400 Mbytes/s seq write and 550 Mbytes/s
> read. the BB cache is enabled with 256MB
>
> sda6 --> xfs with default formatting options.
> sda7 --> mkfs.xfs -f -d sunit=128,swidth=512 /dev/sda7
> sda8 --> ext3 (default)
>
> it looks like mkfs.xfs options sunit=128 and swidth=512 did not improve
> io throughtput as such in bonnie++ tests .
>
> it looks like ext3 with default options performed worst in my case.
>
> regds
> -- mallah
>
>
> NOTE: observations made in this post are interpretations by the poster
> only which may or may not be indicative of the true suitablity of the
> filesystem.
>
>
>
> On Mon, Feb 16, 2009 at 7:01 PM, Gregory Stark <stark(at)enterprisedb(dot)com> wrote:
>> Arjen van der Meijden <acmmailing(at)tweakers(dot)net> writes:
>>
>>> When we purchased our Perc 5/e with MD1000 filled with 15 15k rpm sas disks, my
>>> colleague actually spend some time benchmarking the PERC and a ICP Vortex
>>> (basically a overclocked Adaptec) on those drives. Unfortunately he doesn't
>>> have too many comparable results, but it basically boiled down to quite good
>>> scores for the PERC and a bit less for the ICP Vortex.
>>> IOMeter sequential reads are above 300MB/s for the RAID5 and above 240MB/s for
>>> a RAID10 (and winbench99 versions range from 400+ to 600+MB/s).
>>
>> FWIW those are pretty terrible numbers for fifteen 15k rpm drives. They're
>> about what you would expect if for a PCI-X card which was bus bandwidth
>> limited. A PCI-e card should be able to get about 3x that from the drives.
>>
>> --
>> Gregory Stark
>> EnterpriseDB http://www.enterprisedb.com
>> Ask me about EnterpriseDB's RemoteDBA services!
>>
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>