From: Florian Weimer <fweimer@bfk.de>
To: Ivan Voras <ivoras@freebsd.org>
Cc: pgsql-performance@postgresql.org
Subject: Re: raid10 write performance
Date: Wed, 23 Jun 2010 12:00:21 +0000
Message-ID: <82fx0et0ve.fsf@mid.bfk.de> (raw)
In-Reply-To: <hvsmbq$gok$1@dough.gmane.org>
References: <AANLkTinbKXufTYhNuhNaOW2kWM-simIL3dg0uFX7Ij6g@mail.gmail.com>
<4C20CB5F.2030000@2ndquadrant.com>
<hvsmbq$gok$1@dough.gmane.org>
* Ivan Voras:
> On the other hand, RAID10 is simple enough that soft-RAID
> implementations should be more than adequate - any ideas why a dedicated
> card has it "slow"?
Barrier support on RAID10 seems to require some smallish amount of
non-volatile storage which supports a high number of write operations
per second, so a software-only solution might not be available.
--
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
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To: pgsql-performance@postgresql.org
Cc: fweimer@bfk.de, ivoras@freebsd.org
Subject: Re: raid10 write performance
In-Reply-To: <82fx0et0ve.fsf@mid.bfk.de>
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