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Re: raid10 write performance

From: Florian Weimer <fweimer(at)bfk(dot)de>
To: Ivan Voras <ivoras(at)freebsd(dot)org>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: raid10 write performance
Date: 2010-06-23 12:00:21
Message-ID: 82fx0et0ve.fsf@mid.bfk.de (view raw or flat)
Thread:
Lists: pgsql-performance
* 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(at)bfk(dot)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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