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Re: raid10 write performance

From: Ivan Voras <ivoras(at)freebsd(dot)org>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: raid10 write performance
Date: 2010-06-23 10:06:56
Message-ID: hvsmbq$gok$1@dough.gmane.org (view raw or flat)
Thread:
Lists: pgsql-performance
On 06/22/10 16:40, Greg Smith wrote:
> Grzegorz Jaśkiewicz wrote:
>> raid: serveRAID M5014 SAS/SATA controller
>>   
> 
> Do the "performant servers" have a different RAID card?  This one has
> terrible performance, and could alone be the source of your issue.  The
> ServeRAID cards are slow in general, and certainly slow running RAID10.

What are some good RAID10 cards nowadays?

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"?


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