+Jeff. Jeff, Do you have any ideas here on QoS? Can it be provided as a use-case for multi-tenancy you were working on earlier? regards, Raghavendra. ----- Original Message ----- > From: "Raghavendra Gowdappa" <rgowdapp@xxxxxxxxxx> > To: "Pranith Kumar Karampuri" <pkarampu@xxxxxxxxxx> > Cc: gluster-devel@xxxxxxxxxxx > Sent: Wednesday, September 2, 2015 2:11:35 PM > Subject: Re: FOP ratelimit? > > > > ----- Original Message ----- > > From: "Pranith Kumar Karampuri" <pkarampu@xxxxxxxxxx> > > To: "Emmanuel Dreyfus" <manu@xxxxxxxxxx>, gluster-devel@xxxxxxxxxxx > > Sent: Wednesday, September 2, 2015 2:04:32 PM > > Subject: Re: FOP ratelimit? > > > > > > > > On 09/02/2015 01:59 PM, Emmanuel Dreyfus wrote: > > > Hi > > > > > > Yesterday I experienced the problem of a single user bringing down > > > a glusterfs cluster to its knees because of a high amount of rename > > > operations. > > > > > > I understand rename on DHT can be very costly because data really have > > > to be moved from a brick to another one just for a file name change. > > > Is there a workaround for this behavior? > > This is not true. > > Data is not moved across bricks during rename. So, may be something else is > causing the issue. Were you running rebalance while these renames were being > done? > > > > > > > And more generally, do we have a way to ratelimit FOPs per client, so > > > that one client cannot make the cluster unusable for the others? > > Do you have profile data? > > > > Raghavendra G is working on some QOS related enahancements in gluster. > > Please let us know if you have any inputs here. > > Thanks Pranith. > > @Manu and others, > > Its helpful if you can give some pointers on what parameters (like latency, > throughput etc) you want us to consider for QoS. Also, any ideas (like > interface for QoS) in this area is welcome. With my very basic search, seems > like there are not many filesystems with QoS functionality. > > regards, > Raghavendra. > > > > Pranith > > > > > > > _______________________________________________ > > Gluster-devel mailing list > > Gluster-devel@xxxxxxxxxxx > > http://www.gluster.org/mailman/listinfo/gluster-devel > > > _______________________________________________ > Gluster-devel mailing list > Gluster-devel@xxxxxxxxxxx > http://www.gluster.org/mailman/listinfo/gluster-devel > _______________________________________________ Gluster-devel mailing list Gluster-devel@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-devel
