Dumb filesystem idea
Eric Anderson
anderson at freebsd.org
Mon Feb 5 16:48:31 UTC 2007
On 02/04/07 16:11, Indigo wrote:
> Hello Everyone,
> Im about to try a disklayout experiment and I wanted to ask everyone if
> Im trying things that are pointless or if I should extend the experiment
> somehow.
>
> Hardware:
> Highpoint RocketRAID 2320
> 2xWD Raptor 74GB
> 5xWD Caviar 320GB
>
> Original idea for the setup:
> 74GB RAID1 (Raptors)
> /,/var,/usr
> 50GB RAID0 (Caviars[10GB from each - maybe less])
> swap,/usr/obj,/tmp,[/var/audit]
> 1TB+ RAID5 (Caviars[the rest])
> /home (or just general storage)
>
> The goal is to waste as few fast/reliable space as possible on things that
> CAN be lost and to generally reorganize the filesystem by file purpose.
>
> Known issue is that I'll need some script to recreate the RAID0
> filesystems when they crash.
>
> Am I onto something here? I feel like running in circles - it's dumb to
> put /var/obj on the RAID1 where it just eats valuable space. But it's also
> dumb to put things on a RAID0 where they will crash a running system in
> the event of disk failure. I know my idea won't work but I wanted to ask
> if anyone was playing with similar ideas.
It's not dumb - there's even been some lengthy discussion of this on the
freebsd-geom@ list recently I believe. Check the archives, and you can
read up on nearly this exact scenario.
Eric
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