----- Original Message ----- > From: "Deepak Naidu" <dnaidu@xxxxxxxxxx> > To: gluster-users@xxxxxxxxxxx > Sent: Wednesday, February 22, 2017 3:36:22 PM > Subject: GlusterFS throughput inconsistent > > > > Hello, > > > > I have GlusterFS 3.8.8. I am using IB RDMA. I have noticed during Write or > Read the throughput doesn’t seem consistent for same workload(fio command). > Sometimes I get higher throughput sometimes it quickly goes into half, then > stays there. This is strange, if it were me I would try to create a TCP volume transport instead of RDMA and see if you can reproduce there. > > > > I cannot predict a consistent behavior every time when I run the same > workload. The time to complete varies. Is there any log file or something I > can look into, to understand this behavior. I am single client(fuse) running > 32 thread, 1mb block size, creating 200GB or reading 200GB files randomly > with directIO. To see upto +-5-10% variance between runs is normal(closer to 5%, 10 is a little high). I haven't seen a 50% like you mentioned above, like I said I wonder if this is reproducible on a TCP transport volume? Can you provide some FIO output from a few runs for us to have a look at? -b > > > > -- > > Deepak > > This email message is for the sole use of the intended recipient(s) and may > contain confidential information. Any unauthorized review, use, disclosure > or distribution is prohibited. If you are not the intended recipient, please > contact the sender by reply email and destroy all copies of the original > message. > > > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://lists.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
