[ceph-users] Question/idea about performance problems with a few overloaded OSDs

2014-10-21 Thread Lionel Bouton
Hi, I've yet to install 0.80.7 on one node to confirm its stability and use the new IO prirority tuning parameters enabling prioritized access to data from client requests. In the meantime, faced with large slowdowns caused by resync or external IO load (although external IO load is not expected

Re: [ceph-users] Question/idea about performance problems with a few overloaded OSDs

2014-10-21 Thread Gregory Farnum
On Tue, Oct 21, 2014 at 10:15 AM, Lionel Bouton lionel+c...@bouton.name wrote: Hi, I've yet to install 0.80.7 on one node to confirm its stability and use the new IO prirority tuning parameters enabling prioritized access to data from client requests. In the meantime, faced with large

Re: [ceph-users] Question/idea about performance problems with a few overloaded OSDs

2014-10-21 Thread Lionel Bouton
Hi Gregory, Le 21/10/2014 19:39, Gregory Farnum a écrit : On Tue, Oct 21, 2014 at 10:15 AM, Lionel Bouton lionel+c...@bouton.name wrote: [...] Any thought? Is it based on wrong assumptions? Would it prove to be a can of worms if someone tried to implement it? Yeah, there's one big thing

Re: [ceph-users] Question/idea about performance problems with a few overloaded OSDs

2014-10-21 Thread Mark Nelson
On 10/21/2014 01:06 PM, Lionel Bouton wrote: Hi Gregory, Le 21/10/2014 19:39, Gregory Farnum a écrit : On Tue, Oct 21, 2014 at 10:15 AM, Lionel Bouton lionel+c...@bouton.name wrote: [...] Any thought? Is it based on wrong assumptions? Would it prove to be a can of worms if someone tried to