Hi Francois,
I use ZFS with Squid proxies here at MIT. (MIT New Zealand that is ;))
My basic set up is like so.
- 2 x Sun SPARC v240's dual CPU's with 2 x 36 GB boot disks and 2 x 73
GB cache disks. Each machine has 4GB RAM.
- Each has a copy of squid, Squidguard and an apache server.
- Apache server, serves .pac files for client machines and each .pac
file binds you to that proxy.
- Clients request a .pac from round robin DNS "proxy.manukau.ac.nz"
which then gives you the real
system name of one of these two proxies.
Boot disks are mirrored using disksuite and cache and log file systems
are ZFS. My cache pool is just a mirrored
pool which is then split into three file systems. Cache volume is
restricted to 30 GB in squid config. Max cache object size
is 2MB. Internet bandwidth available to these machines is ~15Mbit/s.
[r...@xxxxx /]#> zpool status
pool: proxpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
proxpool ONLINE 0 0 0
mirror ONLINE 0 0 0
c1t2d0 ONLINE 0 0 0
c1t3d0 ONLINE 0 0 0
errors: No known data errors
[r...@xxxxx /]#> zfs list
NAME USED AVAIL REFER MOUNTPOINT
proxpool 39.5G 27.4G 27K /proxpool
proxpool/apache-logs 2.40G 27.4G 2.40G /proxpool/apache-logs
proxpool/proxy-cache2 29.5G 27.4G 29.5G /proxpool/proxy-cache2
proxpool/proxy-logs 7.54G 27.4G 7.54G /proxpool/proxy-logs
This config works very well for our site and has done for several years
using ZFS and quite a few more
with UFS before that. These two machines support ~4500 desktops give or
take a few. ;)
A mirror or stripe of mirrors will give you best read performance. Also
chuck in as much RAM as you can
for ARC caching.
Hope this real world case is of use to you. Feel free to ask any more
questions..
Cheers,
Scott.
Francois wrote:
Hello list,
What would be the best zpool configuration for a cache/proxy server
(probably based on squid) ?
In other words with which zpool configuration I could expect best
reading performance ? (there'll be some writes too but much less).
Thanks.
--
Francois
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--
_________________________________________________________________________
Scott Lawson
Systems Architect
Information Communication Technology Services
Manukau Institute of Technology
Private Bag 94006
South Auckland Mail Centre
Manukau 2240
Auckland
New Zealand
Phone : +64 09 968 7611
Fax : +64 09 968 7641
Mobile : +64 27 568 7611
mailto:sc...@manukau.ac.nz
http://www.manukau.ac.nz
__________________________________________________________________________
perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
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