On Wed, Sep 2, 2015 at 1:59 PM, Emmanuel Dreyfus <[email protected]> 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?
Not really. DHT uses pointer files (so called link-to) to work around moving file contents on rename(). > > 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? There is some form of limiting based on priority (w/ client-pids) in io-threads. For bit-rot, I had used token bucket based throttling[1] during hash calculation. But that resides on the client side for bitrot xlator. It may be beneficial to have that on the server side. > > -- > Emmanuel Dreyfus > [email protected] > _______________________________________________ > Gluster-devel mailing list > [email protected] > http://www.gluster.org/mailman/listinfo/gluster-devel _______________________________________________ Gluster-devel mailing list [email protected] http://www.gluster.org/mailman/listinfo/gluster-devel
