Right now the big one will be the cache size configurable, and whether directory fragmentation is enabled. You can experiment with the default log size segments as well, but I don't think they'll do much. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com
On Tue, Apr 15, 2014 at 3:31 PM, Qing Zheng <zhe...@cs.cmu.edu> wrote: > Thanks, Greg. > > Are there any recommended Ceph mds configs that can generally help Ceph to > achieve better performance? > > We are currently focusing on multi-mds and directory splitting. > Which options should we pay special attention to? > > Cheers, > > -- Qing > > -----Original Message----- > From: Gregory Farnum [mailto:g...@inktank.com] > Sent: Tuesday, April 15, 2014 5:02 PM > To: Qing Zheng > Cc: ceph-users@lists.ceph.com > Subject: Re: [ceph-users] ceph mds log > > Don't do that. I'm pretty sure it doesn't actually work, and if it does it > certainly won' perform better than with it off. > -Greg > Software Engineer #42 @ http://inktank.com | http://ceph.com > > > On Tue, Apr 15, 2014 at 1:53 PM, Qing Zheng <zhe...@cs.cmu.edu> wrote: >> Hi - >> >> We have a question on mds journaling. >> >> Is it okay to disable mds journaling in order to increase performance, >> which means setting "mds log = false"? >> >> Is this journal required for one to run multi-mds as well as directory >> splitting? >> >> Cheers, >> >> -- Qing >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
