Hi Yann, On 19/01/17 09:35, Yann MAUPU wrote:
Hi everyone, I am currently working on a project for which I am using: * 3 storage nodes connected with Omnipath * 6 sata 750GB HDD per node (total of 18 disks) I created a ZFS raidZ1 on each node (5 disks + 1) and used GlusterFS in raid5 mode between the 3 nodes. Unfortunately, with (very) big files, I experience a quite low read-performance, compared to write-perf (write=700MB/s while read=320 MB/s). Do you know tuning/optimization parameters which could help me get *better read-performance* ?
You can try to set client.event-threads and server.event-threads to higher values. For example 4 or 8 (default is 2).
gluster volume set <volname> client.event-threads 8 gluster volume set <volname> server.event-threads 8 Xavi
Here's more information on the configuration: _ZFS raidz1 on each node:_ /# zpool list////NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT////tank 4,06T 10,5M 4,06T - 0% 0% 1.00x ONLINE -/// /# zpool status//// pool: tank//// state: ONLINE//// scan: none requested////config://// NAME STATE READ WRITE CKSUM//// tank ONLINE 0 0 0//// raidz1-0 ONLINE 0 0 0//// sda ONLINE 0 0 0//// sdb ONLINE 0 0 0//// sdc ONLINE 0 0 0//// sdd ONLINE 0 0 0//// sde ONLINE 0 0 0//// sdf ONLINE 0 0 0////errors: No known data errors/// The command used to create the volume: # zpool create -f tank raidz sda sdb sdc sdd sde sdf When running IOR on each node, I get about /write perf = 460 MB/s/ and /read perf = 430 MB/s/ (writing 1024 GiB with zfer_size=16MiB). _GlusterFS raid5 through TCP (IPoIB) between the 3 nodes:_ # gluster volume create raid55 disperse 3 redundancy 1 sm01.opa:/tank/ec_point sm02.opa:/tank/ec_point sm03.opa:/tank/ec_point There is a big difference between the read-performance on each ZFS node and with Gluster. Thanks in advance :) Yann _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
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