<div dir="ltr">Hi Davide,<div><br></div><div>Can you please share the block hosting volume configuration?</div><div><br></div><div>Also, more details about the kernel and tcmu-runner versions could help in understanding the problem better.</div><div><br></div><div>Thanks,</div><div>Vijay</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Nov 6, 2018 at 6:16 AM Davide Obbi <<a href="mailto:davide.obbi@booking.com">davide.obbi@booking.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr">Hi,<div><br></div><div>i am testing gluster-block and i am wondering if someone has used it and have some feedback regarding its performance.. just to set some expectations... for example:</div><div>- i have deployed a block volume using heketi on a 3 nodes gluster4.1 cluster. it's a replica3 volume.</div><div>- i have mounted via iscsi using multipath config suggested, created vg/lv and put xfs on it</div><div>- all done without touching any volume setting or customizing xfs parameters etc..</div><div>- all baremetal running on 10Gb, gluster has a single block device, SSD in use by heketi</div><div><br></div><div>so i tried a dd and i get a 4.7 MB/s? </div><div>- on the gluster nodes i have in write ~200iops, ~15MB/s, 75% util steady and spiky await time up to 100ms alternating between the servers. CPUs are mostly idle but there is some waiting...</div><div>- Glusterd and fsd utilization is below 1%</div><div><br></div><div>The thing is that a gluster fuse mount on same platform does not have this slowness so there must be something wrong with my understanding of gluster-block? </div><div> </div><div><br></div><div><br></div><div><br></div><div><br></div></div></div>
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