On Mon, 23 Aug 2010 13:11:49 -0300, Robert Pipca <robertpipca@xxxxxxxxx> wrote: > Hi, > > 2010/8/19 Amos Jeffries <squid3@xxxxxxxxxxxxx>: >> Your COSS dirs are already sized at nearly 64GB each (65520 MB). With >> objects up to 1MB stored there. That holds most Windows updates, which >> are >> usually only a few hundred KB each. >> I'm not sure what your slice size is, but 15 of them are stored in RAM at >> any given time. You may want to increase that membuf= parameter a bit, or >> reduce the individual COSS dir size (requires a COSS dir erase and >> rebuild). > > I'm trying to increase the membuf= parameter on COSS, but I had to > reduce the cache_dir (from 65520) size in order to do it: > > cache_dir coss /cache/coss1 60520 max-size=1048575 > max-stripe-waste=32768 block-size=4096 membufs=100 > cache_dir coss /cache/coss2 60520 max-size=1048575 > max-stripe-waste=32768 block-size=4096 membufs=100 > cache_dir coss /cache/coss3 60520 max-size=1048575 > max-stripe-waste=32768 block-size=4096 membufs=100 > > Do you guys have any idea if changing from 15 to 100 is enough? Is > there a way I can test this? > > As far as the slice size goes, I don't know either :) > > I compiled squid with default COSS options, so I guess it's the 1MB > default stripe size. Is this it? > > One last thing: Where there's a documentation commenting on the > real-life benefits on using --enable-coss-aio-ops? Is there any? I'm not aware of anything particular on that option. It allows COSS to use AIO threads for parallel slice read/write to the background disk so common sense indicates it should be faster than a single-threaded queue. > > I could help running some tests and create some documentation for the > COSS wiki page, if you think it'll help other people...I just need > help with some pointers on how to go about testing it right. > Ref: http://wiki.squid-cache.org/Features/CyclicObjectStorageSystem Wonderful. Please do. If you do not already have a wiki account with editing set let me know (privately) what your login name is and I'll set it to editor. Amos
