Harald St?rzebecher wrote: > - telling GlusterFS to always read from local volume: > > http://www.gluster.org/docs/index.php/GlusterFS_Translators_v1.3#Automatic_File_Replication_Translator_.28AFR.29 > > " # option read-subvolume brick2 # by default reads are scheduled > from all subvolumes" > Oh yeah, that should make a big difference if I can tell it to just do reads from the local disks. I was thinking that if it striped reads across all bricks, then I could potentially get higher read speed by not limiting it. But since reads aren't striped, then I might as well just always read locally. > - making sure it's not your network that kills performance: > Do you know the maximum throughput of your network connection? Might > the bottleneck be there? I'd try iperf > (http://dast.nlanr.net/projects/Iperf/) or something like that and/or > run some tests with bonnie on a NFS or CIFS share. > I can get 50-80 MB/sec to our local NFS server using iperf, so I think the gigabit network is performing as expected. > Do you have a machine with two local disks available? In that case I'd > try a configuration completely without a physical network, too. > That's a good suggestion, but any machine I've got with multiple disks already has them in a RAID configuration, so they're not easily available for this kind of testing. > - compiling the latest version from source for testing: > GlusterFS 1.4 is supposed to bring big improvements for small files: > > http://www.gluster.org/docs/index.php/GlusterFS_Roadmap#GlusterFS_1.4_-_Small_File_Performance > Yeah. I guess I just didn't think it'd make a big difference since the bonnie benchmark I've been running uses eight 1GB files, which doesn't really fall under "small file performance". ;) Also, we're looking for options to roll out right away, so I pretty much only want to test the stable release. I understand there's many improvements in 1.4, but I can't really suggest rolling something out now based on the development branch. When 1.4 is stable, then that's what I'll be testing. :) In any case, I've got some decent ideas for modifying my configuration and retesting AFR, so that's what I'm going to do. Thanks! Graeme
