Re: Linux: more cores = less concurrency.

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: mark <dvlhntr(at)gmail(dot)com>
Cc: Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Linux: more cores = less concurrency.
Date: 2011-04-12 00:18:02
Message-ID: BANLkTikDyGKqzP4Q8dLb6Q2wyNd4NKjfyQ@mail.gmail.com
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On Mon, Apr 11, 2011 at 6:05 PM, mark <dvlhntr(at)gmail(dot)com> wrote:
> Just wondering, which LSI card ?
> Was this 32 drives in Raid 1+0 with a two drive raid 1 for logs or some
> other config?

We were using teh LSI8888 but I'll be switching back to Areca when we
go back to HW RAID. The LSI8888 only performed well if we setup 15
RAID-1 pairs in HW and use linux SW RAID 0 on top. RAID1+0 in the
LSI8888 was a pretty mediocre performer. Areca 1680 OTOH, beats it in
every test, with HW RAID10 only. Much simpler to admin.

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