Oğuz Yarımtepe
2018-Nov-13 12:31 UTC
[Gluster-users] latency limits of glusterfs for replicated mod
Hi, I have 4 node GlusterFS running on two different locations in replicated mode. The nodes are splitted equally and the latency is 0.3ms. So i have no problem about replicating so far. Now i want to add two more node at another distance that has |13ms latency. Is it said that replication will not be running in a good way and thing may get obscured and it is not suggested to use in that much latencies. What is the latency limit for GlusterFS while using replicated mode? -- O?uz Yar?mtepe http://about.me/oguzy -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.gluster.org/pipermail/gluster-users/attachments/20181113/b677359b/attachment.html>
Vlad Kopylov
2018-Nov-13 20:32 UTC
[Gluster-users] latency limits of glusterfs for replicated mod
Works with same latency for me on 3.12.15 Only problem is that read and write gets slow. If you host VMs having hypervisor use gfapi: writes will be acceptable, but read will wonder through nodes, obviously slowing down. 0.3 to 13 ms x 2 around 100 times slower. There is select local and latency(and queue) read replica selection functionality in progress https://github.com/gluster/glusterfs/issues/520 Plus halo writes from facehook to make writes replicate on background. Though I was unable to confirm readiness of any of above functionality in practice. You can follow or file github issues. v On Tue, Nov 13, 2018 at 7:32 AM O?uz Yar?mtepe <oguzyarimtepe at gmail.com> wrote:> Hi, > > I have 4 node GlusterFS running on two different locations in replicated > mode. The nodes are splitted equally and the latency is 0.3ms. So i have no > problem about replicating so far. > > Now i want to add two more node at another distance that has |13ms > latency. Is it said that replication will not be running in a good way and > thing may get obscured and it is not suggested to use in that much > latencies. > > What is the latency limit for GlusterFS while using replicated mode? > > -- > O?uz Yar?mtepe > http://about.me/oguzy > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > https://lists.gluster.org/mailman/listinfo/gluster-users-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.gluster.org/pipermail/gluster-users/attachments/20181113/3763d80e/attachment.html>