I've not built such a system myself, so I can't really be sure. The size and speed of the cache pool would have to depend on how much hot data you have at a time. -Greg
On Wed, Jan 21, 2015 at 12:53 AM, Mohamed Pakkeer <mdfakk...@gmail.com> wrote: > Hi Greg, > > We are planning to create 3 PB EC based storage cluster initially. what > would be the recommended hardware configuration for creating caching pool? > How many nodes will cache pool require to cater the 3 PB storage cluster? > What is the size and network connectivity of each node? > > -- Mohammed Pakkeer > > On Wed, Jan 21, 2015 at 11:25 AM, Gregory Farnum <g...@gregs42.com> wrote: >> >> You can run CephFS with a caching pool that is backed by an EC pool, >> but you can't use just an EC pool for either of them. There are >> currently no plans to develop direct EC support; we have some ideas >> but the RADOS EC interface is way more limited than the replicated >> one, and we have a lot of other things we'd like to get right first. >> :) >> -Greg >> >> On Tue, Jan 20, 2015 at 9:53 PM, Mohamed Pakkeer <mdfakk...@gmail.com> >> wrote: >> > Hi Greg, >> > >> > Thanks for your reply. Can we have mixed pools( EC and replicated) for >> > CephFS data and metadata or we have to use anyone pool( EC or >> > Replicated) >> > for creating CephFS? Also we would like to know, when will the >> > production >> > release of CephFS happen with erasure coded pool ? We are ready to test >> > peta-byte scale CephFS cluster with erasure coded pool. >> > >> > >> > -Mohammed Pakkeer >> > >> > On Wed, Jan 21, 2015 at 9:11 AM, Gregory Farnum <g...@gregs42.com> >> > wrote: >> >> >> >> On Tue, Jan 20, 2015 at 5:48 AM, Mohamed Pakkeer <mdfakk...@gmail.com> >> >> wrote: >> >> > >> >> > Hi all, >> >> > >> >> > We are trying to create 2 PB scale Ceph storage cluster for file >> >> > system >> >> > access using erasure coded profiles in giant release. Can we create >> >> > Erasure >> >> > coded pool (k+m = 10 +3) for data and replicated (4 replicas) pool >> >> > for >> >> > metadata for creating CEPHFS? What are the pros and cons of using two >> >> > different pools to create CEPHFS ? >> >> >> >> It's standard to use separate pools. Unfortunately you can't use EC >> >> pools for CephFS right now. >> >> -Greg >> > >> > >> > >> > >> > > > > > _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
