Hi Tino,
Why avoid RAID5? I though that would be good? Can you explain this?
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?
Cheers Thomas
-----Original Message-----
From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of Tino Schwarze
Sent: Montag, 30. Juni 2008 14:53
To: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Recommended RAID for Postgres
On Mon, Jun 30, 2008 at 02:30:23PM +0200, Thomas Bräutigam wrote:
> I have a pretty huge Postgres DB, about 1,3 to 1,5 Terra.
Thats plenty of data.
> What do you guys recommend on RAID Levels for this Database. Which
> does Postgres recommend, and with which do Postgres run very good or
> in the best way?
Avoid RAID5. Go for RAID10.
BTW: I wonder how much the used filesystem affects Postgres' performance...
> What Backup Strategy do you think would be the best. Dump the DB once
> a week or work with the WAL`s? For your info, the data which is feeded
> to the database is available and could be feeded again but it would
> maybe take a couple of days. So what would be a solution to bring up
> the huge DB in about one day after a crash. This would be the target.
How much writing activity is on the DB? WALs are probably the way to go.
How often you backup the whole DB space (as a starting point for replaying WALs) depends on how much changes the DB
gets.And how long it will take to restore the DB space and the WALs afterwards.
HTH,
Tino.
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