Message-ID: <453D2F51.20704@commandprompt.com>
Date: Mon, 23 Oct 2006 14:08:33 -0700
From: "Joshua D. Drake" <jd@commandprompt.com>
Organization: Command Prompt, Inc.
User-Agent: Thunderbird 1.5.0.7 (X11/20060918)
MIME-Version: 1.0
To: Vivek Khera <vivek@khera.org>
CC: "Pgsql-Performance ((((E-mail))))" <pgsql-performance@postgresql.org>
Subject: Re: New hardware thoughts
References: <0D8823B6-2A2D-40BA-B207-9DA0D50EDFB6@vanilla.net>
	<463B9F43-74FC-4DFE-ABC4-357228901174@fastcrypt.com>
	<1423A912-A830-412D-B1DC-5E8B51DF78F0@khera.org>
In-Reply-To: <1423A912-A830-412D-B1DC-5E8B51DF78F0@khera.org>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

> 
> FUD!!!
> 
> They don't randomly change the controllers under the same name.  If you
> order a PERC4e/Si controller you will get the same controller every
> time. 

Actually Vivek this isn't true. Yes the hardware will likely be the
same, but the firmware rev will likely be different and I have seen
firmware make an incredible difference for them.

> This particular controller (found in their PE1850) is incredibly
> fast, sustaining over 80Mb/sec writes to a mirror.  I measured that
> during a DB mirror using slony.

O.k. but my experience shows that mirroring isn't where their problem
is, raid 5 or 10 is :)

Sincerely,

Joshua D. Drake


-- 

   === The PostgreSQL Company: Command Prompt, Inc. ===
Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240
   Providing the most comprehensive  PostgreSQL solutions since 1997
             http://www.commandprompt.com/

Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate