From: | Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> |
---|---|
To: | David Rees <drees76(at)gmail(dot)com> |
Cc: | David Boreham <david_list(at)boreham(dot)org>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: New server setup |
Date: | 2013-03-21 02:26:07 |
Message-ID: | 514A6FBF.2010700@catalyst.net.nz |
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Lists: | pgsql-performance |
On 21/03/13 13:44, David Rees wrote:
> On Thu, Mar 14, 2013 at 4:37 PM, David Boreham <david_list(at)boreham(dot)org> wrote:
>> You might want to evaluate the performance you can achieve with a single-SSD
>> (use several for capacity by all means) before considering a RAID card + SSD
>> solution.
>> Again I bet it depends on the application but our experience with the older
>> Intel 710 series is that their performance out-runs the CPU, at least under
>> our PG workload.
>
> How many people are using a single enterprise grade SSD for production
> without RAID? I've had a few consumer grade SSDs brick themselves -
> but are the enterprise grade SSDs, like the new Intel S3700 which you
> can get in sizes up to 800GB, reliable enough to run as a single drive
> without RAID1? The performance of one is definitely good enough for
> most medium sized workloads without the complexity of a BBU RAID and
> multiple spinning disks...
>
If you are using Intel S3700 or 710's you can certainly use a pair setup
in software RAID1 (so avoiding the need for RAID cards and BBU etc).
I'd certainly feel happier with 2 drives :-) . However, a setup using
replication with a number of hosts - each with a single SSD is going to
be ok.
Regards
Mark
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