Hi Krutika,
Have you be able to look out my profiles? Do you have any clue, idea or suggestion? Thanks, -Gencer From: Krutika Dhananjay [mailto:[email protected]] Sent: Friday, June 30, 2017 3:50 PM To: [email protected] Cc: gluster-user <[email protected]> Subject: Re: [Gluster-users] Very slow performance on Sharded GlusterFS Just noticed that the way you have configured your brick order during volume-create makes both replicas of every set reside on the same machine. That apart, do you see any difference if you change shard-block-size to 512MB? Could you try that? If it doesn't help, could you share the volume-profile output for both the tests (separate)? Here's what you do: 1. Start profile before starting your test - it could be dd or it could be file download. # gluster volume profile <VOL> start 2. Run your test - again either dd or file-download. 3. Once the test has completed, run `gluster volume profile <VOL> info` and redirect its output to a tmp file. 4. Stop profile # gluster volume profile <VOL> stop And attach the volume-profile output file that you saved at a temporary location in step 3. -Krutika On Fri, Jun 30, 2017 at 5:33 PM, <[email protected] <mailto:[email protected]> > wrote: Hi Krutika, Sure, here is volume info: root@sr-09-loc-50-14-18:/# gluster volume info testvol Volume Name: testvol Type: Distributed-Replicate Volume ID: 30426017-59d5-4091-b6bc-279a905b704a Status: Started Snapshot Count: 0 Number of Bricks: 10 x 2 = 20 Transport-type: tcp Bricks: Brick1: sr-09-loc-50-14-18:/bricks/brick1 Brick2: sr-09-loc-50-14-18:/bricks/brick2 Brick3: sr-09-loc-50-14-18:/bricks/brick3 Brick4: sr-09-loc-50-14-18:/bricks/brick4 Brick5: sr-09-loc-50-14-18:/bricks/brick5 Brick6: sr-09-loc-50-14-18:/bricks/brick6 Brick7: sr-09-loc-50-14-18:/bricks/brick7 Brick8: sr-09-loc-50-14-18:/bricks/brick8 Brick9: sr-09-loc-50-14-18:/bricks/brick9 Brick10: sr-09-loc-50-14-18:/bricks/brick10 Brick11: sr-10-loc-50-14-18:/bricks/brick1 Brick12: sr-10-loc-50-14-18:/bricks/brick2 Brick13: sr-10-loc-50-14-18:/bricks/brick3 Brick14: sr-10-loc-50-14-18:/bricks/brick4 Brick15: sr-10-loc-50-14-18:/bricks/brick5 Brick16: sr-10-loc-50-14-18:/bricks/brick6 Brick17: sr-10-loc-50-14-18:/bricks/brick7 Brick18: sr-10-loc-50-14-18:/bricks/brick8 Brick19: sr-10-loc-50-14-18:/bricks/brick9 Brick20: sr-10-loc-50-14-18:/bricks/brick10 Options Reconfigured: features.shard-block-size: 32MB features.shard: on transport.address-family: inet nfs.disable: on -Gencer. From: Krutika Dhananjay [mailto:[email protected] <mailto:[email protected]> ] Sent: Friday, June 30, 2017 2:50 PM To: [email protected] <mailto:[email protected]> Cc: gluster-user <[email protected] <mailto:[email protected]> > Subject: Re: [Gluster-users] Very slow performance on Sharded GlusterFS Could you please provide the volume-info output? -Krutika On Fri, Jun 30, 2017 at 4:23 PM, <[email protected] <mailto:[email protected]> > wrote: Hi, I have an 2 nodes with 20 bricks in total (10+10). First test: 2 Nodes with Distributed – Striped – Replicated (2 x 2) 10GbE Speed between nodes “dd” performance: 400mb/s and higher Downloading a large file from internet and directly to the gluster: 250-300mb/s Now same test without Stripe but with sharding. This results are same when I set shard size 4MB or 32MB. (Again 2x Replica here) Dd performance: 70mb/s Download directly to the gluster performance : 60mb/s Now, If we do this test twice at the same time (two dd or two doewnload at the same time) it goes below 25/mb each or slower. I thought sharding is at least equal or a little slower (maybe?) but these results are terribly slow. I tried tuning (cache, window-size etc..). Nothing helps. GlusterFS 3.11 and Debian 9 used. Kernel also tuned. Disks are “xfs” and 4TB each. Is there any tweak/tuning out there to make it fast? Or is this an expected behavior? If its, It is unacceptable. So slow. I cannot use this on production as it is terribly slow. The reason behind I use shard instead of stripe is i would like to eleminate files that bigger than brick size. Thanks, Gencer. _______________________________________________ Gluster-users mailing list [email protected] <mailto:[email protected]> http://lists.gluster.org/mailman/listinfo/gluster-users
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