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

From: Mario Weilguni <mweilguni(at)sime(dot)com>
To: "Bjoern Metzdorf" <bm(at)turtle-entertainment(dot)de>,"scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com>
Cc: <pgsql-performance(at)postgresql(dot)org>
Subject: Re: [ADMIN] H/W RAID 5 on slower disks versus no raid on
Date: 2002-11-22 07:31:11
Message-ID: 200211220831.11599.mweilguni@sime.com (view raw or flat)
Thread:
Lists: pgsql-adminpgsql-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



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