Date: Sun, 4 Dec 2005 23:49:34 +0000
From: Rory Campbell-Lange <rory@campbell-lange.net>
To: pgsql-performance@postgresql.org
Subject: Dividing up a single 250GB RAID10 server for postgres
Message-ID: <20051204234934.GA12887@campbell-lange.net>
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Hi. We have a server provided for a test of a web application with the
following specifications:

    1 Dual core 1.8GHz Opteron chip
    6 GB RAM
    approx 250GB of RAID10 storage (LSI card + BBU, 4 x 15000 RPM,16MB
    Cache SCSI disks)

The database itself is very unlikely to use up more than 50GB of storage
-- however we are going to be storing pictures and movies etc etc on the
server.

I understand that it is better to run pg_xlog on a separate spindle but
we don't have that option available at present.

Normally I use ext3. I wondered if I should make my normal partitions
and then make a +/- 200GB LVM VG and then slice that initially into a
100GB ext3 data directory and a 50GB xfs postgres data area, giving
100GB to use between these as they grow. I haven't used LVM with xfs
before, however.

Advice gratefully received.
Rory