Re: Moving postgres to FC disks

I agree on not linking and adding non-SAN disk dependancy to your DB. I'm trying to understand your FS reasoning. I have never seen XFS run faster than ReiserFS in any situation (or for that matter beat any FS in performance except JFS). XFS has some nifty very large file features, but we're talking about 30G and all modern FSs support >2G files.

My tendancy would be to stay on ext3, since it is the default RH FS. I would review site preference and the SAN recommended FS and see if they add any compelling points.

/Aaron
----- Original Message -----
From: Joshua D. Drake
To: Anjan Dave
Cc: pgsql-performance(at)postgresql(dot)org
Sent: Tuesday, April 20, 2004 8:27 PM
Subject: Re: [PERFORM] Moving postgres to FC disks

-With the db size being as big as, say, 30+GB, how do I move it on the new logical drive? (stop postgresql, and simply move it over somehow and make a link?)

I would stop the database, move the data directory to the new volume using rsync then start up postgresql pointed at the new data directory.
Providing everything is working correctly you can then remove the old data directory.

-Currently, the internal RAID volume is ext3 filesystem. Any recommendations for the filesystem on the new FC volume? Rieserfs?

XFS

DBs are 7.4.1(RH9), and 7.2.3 (RH8).

Appreciate any pointers.

Thanks,
Anjan

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