Re: SAN vs Internal Disks

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Alan Hodgson <ahodgson(at)simkin(dot)ca>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: SAN vs Internal Disks
Date: 2007-09-07 18:21:58
Message-ID: 46E196C6.9090301@commandprompt.com
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Alan Hodgson wrote:
> On Friday 07 September 2007 10:56, "Bryan Murphy"
> <bryan(dot)murphy(at)gmail(dot)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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