From: Tino Schwarze <postgresql@tisc.de>
To: pgsql-admin@postgresql.org
Subject: Re: Recommended RAID for Postgres
Date: Mon, 30 Jun 2008 15:35:42 +0200
Message-ID: <20080630133542.GC24497@easy2.in-chemnitz.de> (raw)
In-Reply-To: <46F5921DF52F6E40860287B30CADADC79463C4@EROS.nexus-ag.com>
References: <46F5921DF52F6E40860287B30CADADC79463A3@EROS.nexus-ag.com>
<20080630125231.GB24497@easy2.in-chemnitz.de>
<46F5921DF52F6E40860287B30CADADC79463C4@EROS.nexus-ag.com>
On Mon, Jun 30, 2008 at 03:15:34PM +0200, Thomas Bräutigam wrote:
> Why avoid RAID5? I though that would be good? Can you explain this?
RAID5 has a lot of disadvantages, especially in terms of performance.
.oO(There was a link posted recently...)
> Writing in the DB, I add about 5-10 GB of data a day. There is a lot of writing activity going on in the database every day.
> What do you recommend how often I should backup the complete database?
What storage subsystem do you use? This sounds like you want something
like snapshots or similar to do backup. How long do you expect a 1-1.5
TB backup to run? I don't know. My biggest DBs are like 110 GB
(compressed dump), 300-400 GB on disk and they are difficult to handle
already.
Maybe other Postgres admins have more experience with such big DBs.
Tino.
--
"What we nourish flourishes." - "Was wir nähren erblüht."
www.craniosacralzentrum.de
www.forteego.de
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To: pgsql-admin@postgresql.org
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Subject: Re: Recommended RAID for Postgres
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