[tech] morwong's disks

[Adrian Chadd]

On Wed, Aug 13, 2003, James Andrewartha wrote:
> Morwong now has 5x 9gig and 1x4 gig disks. Currently, 2 9s and one are in
> use, with /home wholly using one of the 9s. This means we have 4x 9gig
> disks available for /home. There are several options:
> 
> o Software RAID 5 across all 4 disks. Gives 27gig usable space, some
>   redundancy, some CPU hit.
> 
> o Two RAID 1 sets containing 2 disks each, added to the one domain. Gives
>   18gig usable space, good redundancy, little CPU usage (comparatively).

I'd do this. If the free space was kept high, life would be all sweet.
IO performance wouldn't suck. Since we have many, many small files 
I'd suggest keeping something rather fat like a 2 and a bit gig freespace
allotment.

I'm sure you can do that kinda shit under advfs but if you can't would
a big group quota suffice? I know wheel users can still abuse their
rewt but still..

FYI, this evenings run:

Top 5 Homedirs by usage: /home/wheel/
974615 /home/wheel//nick/
666941 /home/wheel//trs80/
353375 /home/wheel//mtearle/
322122 /home/wheel//matt/
300982 /home/wheel//yakk/


Top 5 Homedirs by usage: /home/ucc/
504031 /home/ucc//knight/
397116 /home/ucc//tieryn/
374589 /home/ucc//chas/
370093 /home/ucc//zarquin/
357053 /home/ucc//packrat/

thats 2.6gig by the wheel users and 2.0 gig by the gumby users.
Thats, like, 30% of space being used by 10 users. And they consistent
increase nightly. Damned mail.




Adrian