Horton

Re: [ADMIN] H/W RAID 5 on slower disks versus no raid on

Mario Weilguni <mweilguni@sime.com>

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From: Mario Weilguni <mweilguni@sime.com>
To: "Bjoern Metzdorf" <bm@turtle-entertainment.de>, "scott.marlowe" <scott.marlowe@ihs.com>
Cc: <pgsql-performance@postgresql.org>
Date: 2002-11-22T07:31:11Z
Lists: pgsql-performance 
Am Donnerstag, 21. November 2002 21:53 schrieb Bjoern Metzdorf:
> > In fact, the linux kernel supports >2 drives in a mirror.  Useful for a
> > mostly read database that needs to handle lots of concurrent users.
>
> Good to know.
>
> What do you think is faster: 3 drives in raid 1 or 3 drives in raid 5?
>
> Regards,
> Bjoern
>

If 4 drives are an option, I suggest 2 x RAID1, one for data, and one for WAL and temporary DB space (pg_temp).

Regards,
	Mario Weilguni