Message-ID: <514A6FBF.2010700@catalyst.net.nz>
Date: Thu, 21 Mar 2013 15:26:07 +1300
From: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
User-Agent: Mozilla/5.0 (X11; Linux x86_64;
	rv:17.0) Gecko/20130311 Thunderbird/17.0.4
MIME-Version: 1.0
To: David Rees <drees76@gmail.com>
CC: David Boreham <david_list@boreham.org>, pgsql-performance@postgresql.org
Subject: Re: New server setup
References: <4D6D1410-2208-4DAA-BD64-69BE1FD94E55@autouncle.com>
	<513CADB7.4030803@2ndQuadrant.com>
	<CAJY59_jNGwrPceXg8k04=1VWTTZTFTPTh+jGHopx92c+17Cj1w@mail.gmail.com>
	<20130314185424.GA28770@momjian.us>
	<51424333.608@catalyst.net.nz> <51425F52.6040607@boreham.org>
	<CAHtT9RuWDrqD5FvoiKkRgUx8TbWLd6hhAOwT0zDtGbvrvYJahw@mail.gmail.com>
In-Reply-To: 
 <CAHtT9RuWDrqD5FvoiKkRgUx8TbWLd6hhAOwT0zDtGbvrvYJahw@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk
Sender: pgsql-performance-owner@postgresql.org

On 21/03/13 13:44, David Rees wrote:
> On Thu, Mar 14, 2013 at 4:37 PM, David Boreham <david_list@boreham.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


-- 
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance