Skip site navigation (1) Skip section navigation (2)

Re: DRBD and Postgres: how to improve the perfomance?

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
Cc: Gregory Stark <stark(at)enterprisedb(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Bernd Helmle <mailings(at)oopsware(dot)de>, mfatticcioni(at)mbigroup(dot)it, pgsql-performance(at)postgresql(dot)org
Subject: Re: DRBD and Postgres: how to improve the perfomance?
Date: 2007-09-08 16:53:30
Message-ID: 46E2D38A.6070607@commandprompt.com (view raw or flat)
Thread:
Lists: pgsql-performance
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Stefan Kaltenbrunner wrote:
> Joshua D. Drake wrote:
>> Gregory Stark wrote:
>>> "Simon Riggs" <simon(at)2ndquadrant(dot)com> writes:
>>>> You're right, but the distinction is a small one. What are the chances
>>>> of losing two independent servers within a few milliseconds of each
>>>> other? 
>>> If they're on the same power bus?
>> That chance is minuscule or at least should be. Of course we are
>> assuming some level of conditioned power that is independent of the
>> power bus, e.g; a UPS.
> 
> 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.

> If the UPS fails (or the generator is not kicking in which happens way
> more often than people would believe) they could still fail at the very
> same time ....

Sincerely,

Joshua D. Drake





> 
> 
> Stefan
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
> 
>                http://archives.postgresql.org
> 


- --

      === The PostgreSQL Company: Command Prompt, Inc. ===
Sales/Support: +1.503.667.4564   24x7/Emergency: +1.800.492.2240
PostgreSQL solutions since 1997  http://www.commandprompt.com/
			UNIQUE NOT NULL
Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
PostgreSQL Replication: http://www.commandprompt.com/products/

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFG4tOKATb/zqfZUUQRAiSTAJ4pqQqsP7aH9GPJYjY3hZDvKzU8cACeKKJ3
wAae0tl2XswsjgEncIsOBlw=
=xsGZ
-----END PGP SIGNATURE-----

In response to

Responses

pgsql-performance by date

Next:From: Joshua D. DrakeDate: 2007-09-08 17:02:33
Subject: Re: DRBD and Postgres: how to improve the perfomance?
Previous:From: Gregory StarkDate: 2007-09-08 16:49:09
Subject: Re: DRBD and Postgres: how to improve the perfomance?

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group