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From: Dave Cramer <pg@fastcrypt.com>
To: Justin <justin@emproshunts.com>
Cc: Greg Smith <gsmith@gregsmith.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Benchmark: Dell/Perc 6, 8 disk RAID 10
Date: Sun, 16 Mar 2008 07:25:41 -0400
Message-ID: <F38ADB71-8F77-41C8-9066-488FFCA7BD67@fastcrypt.com> (raw)
In-Reply-To: <47DCBBF9.1090401@emproshunts.com>
References: <f966c2ee0803052142l6a105678jfe2da92a0d9371@mail.gmail.com>
	<Pine.GSO.4.64.0803060813570.11897@westnet.com>
	<47D00DB2.7040007@emolecules.com>
	<18451.1204824562@sss.pgh.pa.us>
	<47D0AFC1.5070305@emolecules.com>
	<08115901408538@mail.emproshunts.com>
	<47D93A43.6020503@emolecules.com>
	<016301c8854e$851e06e0$3101a8c0@JDell>
	<dcc563d10803132312o1539215fk859bbae03f36e566@mail.gmail.com>
	<47DA1866.3050500@krogh.cc>
	<dcc563d10803132319u19480a4fn16115c415ee57844@mail.gmail.com>
	<47DA37E1.6050104@emproshunts.com>
	<Pine.GSO.4.64.0803140359220.20241@westnet.com>
	<47DA5852.30004@emproshunts.com>
	<47DCBBF9.1090401@emproshunts.com>


On 16-Mar-08, at 2:19 AM, Justin wrote:

>
> I decided to reformat the raid 10 into ext2 to see if there was any  
> real big difference in performance as some people have noted   here  
> is the test results
>
> please note the WAL files are still on the raid 0 set which is still  
> in ext3 file system format.  these test where run with the fsync as  
> before.   I made sure every thing was the same as with the first test.
>
This is opposite to the way I run things. I use ext2 on the WAL and  
ext3 on the data. I'd also suggest RAID 10 on the WAL it is mostly  
write.

Dave

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