I am seeing extremely slow performance with glusterfs. OS: CentOS 5 glusterfs version: glusterfs-1.3.9-1 Server configuration: ############################################## ### GlusterFS Server Volume Specification ## ############################################## #### CONFIG FILE RULES: ### "#" is comment character. ### - Config file is case sensitive ### - Options within a volume block can be in any order. ### - Spaces or tabs are used as delimitter within a line. ### - Multiple values to options will be : delimitted. ### - Each option should end within a line. ### - Missing or commented fields will assume default values. ### - Blank/commented lines are allowed. ### - Sub-volumes should already be defined above before referring. volume shelf-1 type storage/posix option directory /glusterfs/shelf-1 end-volume volume shelf-1-readahead type performance/read-ahead subvolumes shelf-1 end-volume volume shelf-1-writebehind type performance/write-behind option aggregate-size 1MB option window-size 4MB subvolumes shelf-1-readahead end-volume ### Add network serving capability to above brick. volume server type protocol/server option transport-type tcp/server # For TCP/IP transport subvolumes shelf-1-writebehind option auth.ip.shelf-1-writebehind.allow 127.0.0.1 end-volume Local client configuration: ############################################## ### GlusterFS Client Volume Specification ## ############################################## volume storage type protocol/client option transport-type tcp/client option remote-host 127.0.0.1 option remote-subvolume shelf-1-writebehind end-volume Writing directly to the underlying filesystem: -bash-3.2# dd if=/dev/zero of=/glusterfs/shelf-1/testing count=20M 20971520+0 records in 20971520+0 records out 10737418240 bytes (11 GB) copied, 230.862 seconds, 46.5 MB/s Writing through glusterfs with no readahead/writebehind: -bash-3.2# dd if=/dev/zero of=/storage/testing count=20M 20971520+0 records in 20971520+0 records out 10737418240 bytes (11 GB) copied, 3429.89 seconds, 3.1 MB/s Using the above configuration is even slower: -bash-3.2# dd if=/dev/zero of=/storage/testing count=20M 20971520+0 records in 20971520+0 records out 10737418240 bytes (11 GB) copied, 4379.16 seconds, 2.5 MB/s What should I be trying to improve performance? I really need help! -- Matt
