I have a brick on a MD RAID5 array formatted with ext4 on a gigabit network. My brick is located at /srv/media. dd if=/dev/zero of=/srv/media/test.zero reports 150MB/sec dd reading reports 300MB/sec I have used iperf to verify it is not a network adapter issue. I get 1gbit/sec each way. On GlusterFS 3.2 my read and write performance was as expected. 100MB/sec each way. On GlusterFS 3.3, my read speed is still 100MB/sec but my write speed never exceeds 10MB/sec. It seems something is purposely throttling my writes like I'm on a 100mbit network. CPU usage on the server and client are around 25% during the transfer. No other processes are eating I/O. Any ideas on why write performance is suffering? gluster> volume info Volume Name: media Type: Distribute Volume ID: 990a5d58-f76c-405c-a7bf-096e70b9fed3 Status: Started Number of Bricks: 1 Transport-type: tcp Bricks: Brick1: 10.0.0.1:/srv/media Options Reconfigured: auth.allow: 10.0.0.* nfs.disable: On performance.cache-size: 128MB performance.write-behind-window-size: 128MB Thanks, Michael
