The idea is to cache rbd at a host level. Also could be possible to cache at the osd level. We have high iowait and we need to lower it a bit, since we are getting the max from our sas disks 100-110 iops per disk (3TB osd's), any advice? Flashcache?
On Thursday, July 2, 2015, Jan Schermer <[email protected]> wrote: > I think I posted my experience here ~1 month ago. > > My advice for EnhanceIO: don’t use it. > > But you didn’t exactly say what you want to cache - do you want to cache > the OSD filestore disks? RBD devices on hosts? RBD devices inside guests? > > Jan > > > On 02 Jul 2015, at 11:29, Emmanuel Florac <[email protected] > <javascript:;>> wrote: > > > > Le Wed, 1 Jul 2015 17:13:03 -0300 > > German Anders <[email protected] <javascript:;>> écrivait: > > > >> Hi cephers, > >> > >> Is anyone out there that implement enhanceIO in a production > >> environment? any recommendation? any perf output to share with the > >> diff between using it and not? > > > > I've tried EnhanceIO back when it wasn't too stale, but never put it in > > production. I've set up bcache on trial, it has its problems (load is > > stuck at 1.0 because of the bcache_writeback kernel thread, and I > > suspect a crash was due to it) but works pretty well overall. > > > > -- > > ------------------------------------------------------------------------ > > Emmanuel Florac | Direction technique > > | Intellique > > | <[email protected] <javascript:;>> > > | +33 1 78 94 84 02 > > ------------------------------------------------------------------------ > > _______________________________________________ > > ceph-users mailing list > > [email protected] <javascript:;> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- *German Anders* Storage System Engineer Leader *Despegar* | IT Team *office* +54 11 4894 3500 x3408 *mobile* +54 911 3493 7262 *mail* [email protected]
_______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
