From: Joshua D. Drake <jd@commandprompt.com>
To: Alan Hodgson <ahodgson@simkin.ca>
Cc: pgsql-performance@postgresql.org
Subject: Re: SAN vs Internal Disks
Date: Fri, 07 Sep 2007 11:21:58 -0700
Message-ID: <46E196C6.9090301@commandprompt.com> (raw)
In-Reply-To: <200709071118.42749@hal.simkin.ca>
References: <a199704d0709060535q6fea139aq2e3863e685555b0d@mail.gmail.com>
<46E18886.7060502@aptalaska.net>
<bd8531800709071056g740cb44cld04cd489bc4e6343@mail.gmail.com>
<200709071118.42749@hal.simkin.ca>
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Alan Hodgson wrote:
> On Friday 07 September 2007 10:56, "Bryan Murphy"
> <bryan.murphy@gmail.com> wrote:
>> Our database server connects to the san via iSCSI over Gig/E using
>> jumbo frames. File system is XFS (noatime).
>>
>> Throughput, however, kinda sucks. I just can't get the kind of
>> throughput to it I was hoping to get.
>
> A single Gig/E couldn't even theoretically do better than 125MB/sec, so
> yeah I would expect throughput sucks pretty bad.
We have a customer that has a iSCSI SAN that can bond multiple Gig/E
connections that provides them with reasonable performance. You should
see if yours allows it.
Joshua D. Drake
>
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, ahodgson@simkin.ca
Subject: Re: SAN vs Internal Disks
In-Reply-To: <46E196C6.9090301@commandprompt.com>
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