Message-ID: <46E31493.6050409@commandprompt.com>
Date: Sat, 08 Sep 2007 14:30:59 -0700
From: "Joshua D. Drake" <jd@commandprompt.com>
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To: "Joshua D. Drake" <jd@commandprompt.com>
CC: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>,
	Gregory Stark <stark@enterprisedb.com>,
	Simon Riggs <simon@2ndquadrant.com>,
	Bernd Helmle <mailings@oopsware.de>, mfatticcioni@mbigroup.it,
	pgsql-performance@postgresql.org
Subject: Re: DRBD and Postgres: how to improve the perfomance?
References: <2C070D1C3970467FF64F6B6A@imhotep.credativ.de>
	<1189232904.4281.19.camel@ebony.site>
	<87k5r1zd52.fsf@oxford.xeocode.com>
	<46E2CAAF.50205@commandprompt.com>
	<46E2CEF3.1030908@kaltenbrunner.cc>
	<46E2D38A.6070607@commandprompt.com>
	<46E2DB04.1080803@kaltenbrunner.cc>
	<46E31339.6090909@commandprompt.com>
In-Reply-To: <46E31339.6090909@commandprompt.com>
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Joshua D. Drake wrote:
> Stefan Kaltenbrunner wrote:
>> Joshua D. Drake wrote:
>>> Stefan Kaltenbrunner wrote:
> 
>>>> how is that making it different in practise ? - if both are on the same
>>>> UPS they are affectively on the same power bus ...
>>> Well I was thinking the bus that is in the wall. I would assume that
>>> people were smart enough to have independent UPS systems for each server.
>>>
>>> city power->line conditioning generator->panel->plug->UPS->server
>>>
>>> wash, rinse repeat.
>> the typical datacenter version of this is actually more like:
> 
>> city power->UPS (with generator in parallel)->panel->plug
> 
> Right, this is what we have at our colo except that I add a UPS where
> appropriate in between panel and plug.

Err plug and machine.

Joshua D. Drake
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