Thread (4 messages) 4 messages, 3 authors, 2006-11-20

Re: Raid 1 (non) performance

From: Magnus Naeslund(k) <hidden>
Date: 2006-11-20 14:12:19

dean gaudet wrote:
i see you have split /var and / on the same spindle... if your /home is on 
/ then you're causing extra seek action by having two active filesystems 
on the same spindles.  another option to consider is to make / small and 
mostly read-only and move /home to /var/home (and use a symlink or mount 
--bind to place it at /home).
Yes I have it like this now:
	/var/bind/home on /home type bind (rw,bind,noatime)
hopefully your swap isn't being used much anyhow.
Zero used, infact.
try "iostat -kx /dev/sd* 5" and see if the split is causing you troubles 
-- i/o activity on more than one partition at once.
It seems to be roughly the same numbers on the disks.
turning off write caching is a recipe for disasterous performance on most 
ata disks... unfortunately.  better to buy a UPS and set up nut or apcupsd 
or something to handle shutdown.  or just take your chances.
This is a mail server, I would like it to not lose mail if there is an power outage.
Is there anything one can do without buying more hardware?


Thanks for the feedback,
Magnus
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