On Wed, Aug 09, 2006, Adrian Chadd wrote: > COSS, which Steven Wilton and I have put a lot of effort into over > the last few months, is a 'raw io' filesystem which speaks direct > to a block device (or file if you prefer.) > > When benchmarking COSS I noticed using ext3 rather than the raw > device gave a rough 20% increase in disk IO bandwidth. I was also > seeing the IO being scheduled in 'clumps' rather than evenly over > time. > > So yes, rawio is faster. :0 .. oh, and I forgot to explain what COSS is in case you don't know. Its a cyclic-type filesystem which was designed to store small objects (under 128kb). Its not designed to store arbitrary-sized objects. It handles that workload a -lot- better than the unix filesystems. Squid could probably utilise some of the more modern unix filesystems a tad better then it does to get more performance out of it. Adrian
