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Re: dell versus hp

From: "Merlin Moncure" <mmoncure(at)gmail(dot)com>
To: "Alan Hodgson" <ahodgson(at)simkin(dot)ca>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: dell versus hp
Date: 2007-11-15 01:56:32
Message-ID: b42b73150711141756w1f9a3f6i24a4d8c1b2c25322@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Nov 14, 2007 5:24 PM, Alan Hodgson <ahodgson(at)simkin(dot)ca> wrote:
> On Tuesday 13 November 2007, Jeff Frost <jeff(at)frostconsultingllc(dot)com> wrote:
> > Ok, Areca ARC1261ML.  Note that results were similar for an 8 drive RAID6
> > vs 8 drive RAID10, but I don't have those bonnie results any longer.
> >
> > Version  1.03       ------Sequential Output------ --Sequential Input-
> > --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> > Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
> > /sec %CP 14xRAID6        63G 73967  99 455162  58 164543  23 77637  99
> > 438570  31 912.2   1 ------Sequential Create------ --------Random
> > Create-------- -Create-- --Read--- -Delete-- -Create-- --Read---
> > -Delete-- files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec
> > %CP 16 12815  63 +++++ +++ 13041  61 12846  67 +++++ +++ 12871  59
> >
> >
> > Version  1.03       ------Sequential Output------ --Sequential Input-
> > --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
> > Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP
> > /sec %CP 14xRAID10       63G 63968  92 246143  68 140634  30 77722  99
> > 510904 36 607.8   0 ------Sequential Create------ --------Random
> > Create-------- -Create-- --Read--- -Delete-- -Create-- --Read---
> > -Delete-- files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP /sec
> > %CP 16  6655  16 +++++ +++  5755  12  7259  17 +++++ +++ 5550  12
>
> OK, impressive RAID-6 performance (not so impressive RAID-10 performance,
> but that could be a filesystem issue). Note to self; try an Areca
> controller in next storage server.

607 seeks/sec on a 8 drive raid 10 is terrible...this is not as
dependant on filesystem as sequential performance...

merlin

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Subject: Re: dell versus hp
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