Have you tried reiserfs with noatime,notail? That's said to be among the fastest performers among mainstream filesystems for Squid. On Tuesday 27 June 2006 3:09 pm, O'Brien, Kevin wrote: > Unfortunately we already use ext2 and noatime, but thanks for the > suggestion. > > -=Kevin=- > -----Original Message----- > From: Mike Rambo [mailto:mrambo@xxxxxxxxxxxxx] > Sent: Tuesday, June 27, 2006 9:33 AM > To: Squid Users List > Subject: Re: RE: Increased service times using aufs vs > diskd > > O'Brien, Kevin wrote: > > No takers? > > > > The other interesting thing is that the service times increase as > > traffic decreases. Any theories on that? > > > > -=Kevin=- > > > > _____________________________________________ > > Sent: Thursday, June 22, 2006 1:22 PM > > To: 'squid-users@xxxxxxxxxxxxxxx' > > Subject: Increased service times using aufs vs diskd > > > > I'm using squid as an accelerator and I switched my cache_dir from > > diskd > > > (used because server is SMP) to aufs because of various bugs in the > > diskd code (761, 1500). However, when I make the switch (and clear > > the > > > cache_dir contents) the overall, hit, miss, and near miss service > > times > > > increase by almost 10 times. Using diskd, the 24 hour average for > > overall, hit, and near miss is 4ms and near miss is 1ms. After the > > switch, the times rocket up to 44ms, 43ms, 49ms, and 45ms for > > overall, hit, miss, and near miss. I am wondering if this is just a > > function > > of > > > the squid process now handling disk requests or is an indication of > > another problem (although ~40ms is probably not much of a problem). > > > > Here's the details of the system: > > OS: RHEL4 > > Squid: 2.5.stable14 with epoll patch > > Build options: ./configure --enable-epoll --enable-snmp > > --enable-removal-policies=heap,lru --enable-storeio=aufs,diskd,ufs > > --with-pthreads --enable-cachemgr-hostname=localhost > > --disable-ident-lookups --enable-truncate --enable-cache-digests > > --enable-htcp > > <snip> > > I didn't see what filesystem you are using. Changing from ext3 to ext2 > and setting noatime on the cache_dir disks helped us in this > circumstance.
