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From: Arjen van der Meijden <acmmailing@tweakers.net>
To: david@lang.hm
Cc: Christian Nicolaisen <blackbrrd@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: 8x2.5" or 6x3.5" disks
Date: Tue, 29 Jan 2008 11:29:23 +0100
Message-ID: <479F0003.6080003@tweakers.net> (raw)
In-Reply-To: <alpine.DEB.1.00.0801290030390.16707@asgard.lang.hm>
References: <285fb20801281125k641902feo8d74b1c68640d94b@mail.gmail.com>
	<479E3AE5.20600@tweakers.net>
	<alpine.DEB.1.00.0801290030390.16707@asgard.lang.hm>

There are several suppliers who offer Seagate's 2.5" 15k rpm disks, I 
know HP, Dell are amongst those. So I was actually refering to those, 
rather than to the 10k one's.

Best regards,

Arjen

david@lang.hm wrote:
> On Mon, 28 Jan 2008, Arjen van der Meijden wrote:
> 
>> On 28-1-2008 20:25 Christian Nicolaisen wrote:
>>> So, my question is: should I go for the 2.5" disk setup or 3.5" disk 
>>> setup, and does the raid setup in either case look correct?
>>
>> Afaik they are about equal in speed. With the smaller ones being a bit 
>> faster in random access and the larger ones a bit faster for 
>> sequential reads/writes.
> 
> I missed the initial post in this thread, but I haven't seen any 15K rpm 
> 2.5" drives, so if you compare 10K rpm 2.5" drives with 15K rpm 3.5" 
> drives you will see differences (depending on your workload and 
> controller cache)
> 
> David Lang
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>       choose an index scan if your joining column's datatypes do not
>       match
> 



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