Hello, I'm keen to use glusterfs as scalable storage to match the rest of my horizontally-scalable, commodity platform. I've been testing on a machine with 4x SATA 7200 drives. I created four KVM virtual machines, gave each of them a dedicated disk, and installed gluster-3.2.2. I created a distributed replicated volume across four bricks, with a replication factor of 2. The virtual machines are networked together via software bridge (standard KVM). When transferring a 4GB filesystem of relatively small files (mean=795KB), I see write throughput of about 512 KB/s, with reads approaching 3 MB/s. As expected, large files show much better throughput: 20MB/s write and 50MB/s read for a 500MB file. In production, I plan to swap out magnetic drives for SSDs. Will this help with the write performance of small files on glusterfs, as I suspect? Are my results for small files consistent with other users? Cheers, -C-
