We have addressed few parts of the rebalance performance which should be backported to 3.7 soon. Regards, Susant ----- Original Message ----- > From: "Raghavendra Bhat" <rabhat@xxxxxxxxxx> > To: "Alex Crow" <acrow@xxxxxxxxxxxxxxxx> > Cc: gluster-users@xxxxxxxxxxx > Sent: Thursday, 30 April, 2015 2:30:41 PM > Subject: Re: Poor performance with small files > > On Thursday 30 April 2015 01:55 PM, Alex Crow wrote: > > > >> Upgrade to 3.6.3 and set client.event-threads and > >> server.event-threads to at least 4: > >> > >> "Previously, epoll thread did socket even-handling and the same > >> thread was used for serving the client or processing the response > >> received from the server. Due to this, other requests were in a queue > >> untill the current epoll thread completed its operation. With > >> multi-threaded epoll, events are distributed that improves the > >> performance due the parallel processing of requests/responses received." > >> > >> Here are the guidelines for tuning them: > >> > >> https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Administration_Guide/Small_File_Performance_Enhancements.html > >> > >> > >> In my testing with epoll threads at 4 I saw a between a 15% and 50% > >> increase depending on the workload. > >> > >> There are several smallfile perf enhancements in the works: > >> > >> *http://www.gluster.org/community/documentation/index.php/Features/Feature_Smallfile_Perf > >> > >> > >> *Lookup unhashed is the next feature and should be ready with > >> 3.7(correct me if I am wrong). > >> > >> *If you are using RAID 6 you may want to do some testing with RAID 10 > >> or JBOD, but the benefits here only come into play with alot of > >> concurrent access(30+ processes / threads working with different files). > >> > >> *Tiering may help here if you want to add some SSDs, this is also a > >> 3.7 feature. > >> > >> HTH! > >> > >> -b > > Hi, > > > > I'm on 3.6.3 and these options are not available: > > > > volume set: failed: option : client.event-threads does not exist > > volume set: failed: option : server.event-threads does not exist > > > > Any ideas? > > > > Alex > > > > Alex, > > That option is there in the upcoming 3.7 release. Its not available in > 3.6.3. > Regarding rebalance performancem, CCing Raghavendra G, maintainer of DHT > (Distribute xlator). > > Regards, > Raghavendra Bhat > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://www.gluster.org/mailman/listinfo/gluster-users > _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-users
