From: Stef Telford <stef@ummon.com>
To: Matthew Wakeling <matthew@flymine.org>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Raid 10 chunksize
Date: Wed, 01 Apr 2009 13:10:48 -0400
Message-ID: <49D3A018.7090700@ummon.com> (raw)
In-Reply-To: <alpine.DEB.2.00.0904011757580.21772@aragorn.flymine.org>
References: <C5F14970.3CA1%scott@richrelevance.com>
<49D31E85.8050405@paradise.net.nz>
<49D37CAA.6080100@ummon.com>
<alpine.GSO.2.01.0904011144270.23835@westnet.com>
<49D3932D.3080808@ummon.com>
<dcc563d10904010941r283b7536g383c8daa8b933ce7@mail.gmail.com>
<49D39AFA.8000700@ummon.com>
<alpine.DEB.2.00.0904011757580.21772@aragorn.flymine.org>
Matthew Wakeling wrote:
> On Wed, 1 Apr 2009, Stef Telford wrote:
>> Good UPS, a warm PITR standby, offsite backups and regular checks is
>> "good enough" for me, and really, that's what it all comes down to.
>> Mitigating risk and factors into an 'acceptable' amount for each person.
>> However, if you see over a 2x improvement from turning write-cache 'on'
>> and have everything else in place, well, that seems like a 'no-brainer'
>> to me, at least ;)
>
> In that case, buying a battery-backed-up cache in the RAID controller
> would be even more of a no-brainer.
>
> Matthew
>
Hey Matthew,
See about 3 messages ago.. We already have them (I did say UPS or
BBU, it should have been a logical 'and' instead of logical 'or' .. my
bad ;). Your right though, that was a no-brainer as well.
I am wondering how the card (3ware 9550sx) will work with SSD's, md
or lvm, blocksize, ext3 or ext4 .. but.. this is the point of
benchmarking ;)
Regards
Stef
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To: pgsql-performance@postgresql.org
Cc: stef@ummon.com, matthew@flymine.org
Subject: Re: Raid 10 chunksize
In-Reply-To: <49D3A018.7090700@ummon.com>
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