Skip site navigation (1) Skip section navigation (2)

Re: With 4 disks should I go for RAID 5 or RAID 10

From: Mark Mielke <mark(at)mark(dot)mielke(dot)cc>
To: Florian Weimer <fw(at)deneb(dot)enyo(dot)de>
Cc: david(at)lang(dot)hm, Fernando Hevia <fhevia(at)ip-tel(dot)com(dot)ar>, 'pgsql-performance' <pgsql-performance(at)postgresql(dot)org>
Subject: Re: With 4 disks should I go for RAID 5 or RAID 10
Date: 2007-12-26 21:40:40
Message-ID: 4772CA58.5050406@mark.mielke.cc (view raw or flat)
Thread:
Lists: pgsql-performance
Florian Weimer wrote:
>> seek/read/calculate/seek/write since the drive moves on after the
>> read), when you read you must read _all_ drives in the set to check
>> the data integrity.
>>     
> I don't know of any RAID implementation that performs consistency
> checking on each read operation. 8-(
>   

Dave had too much egg nog... :-)

Yep - checking consistency on read would eliminate the performance 
benefits of RAID under any redundant configuration.

Cheers,
mark

-- 
Mark Mielke <mark(at)mielke(dot)cc>

In response to

Responses

pgsql-performance by date

Next:From: Jared MauchDate: 2007-12-26 21:49:59
Subject: Re: pg_dump performance
Previous:From: Heikki LinnakangasDate: 2007-12-26 21:35:59
Subject: Re: pg_dump performance

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group