Greg, Probably not supported right now, but, wanted to confirm if there is any way we can use Ceph cache tier for only writes and reads are forwarded to the backend erasure coded pool. Thanks & Regards Somnath -----Original Message----- From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Somnath Roy Sent: Thursday, April 30, 2015 2:28 PM To: Gregory Farnum Cc: ceph-devel Subject: RE: CephFS + Erasure coding Got it , thanks ! -----Original Message----- From: Gregory Farnum [mailto:greg@xxxxxxxxxxx] Sent: Thursday, April 30, 2015 2:21 PM To: Somnath Roy Cc: ceph-devel Subject: Re: CephFS + Erasure coding On Thu, Apr 30, 2015 at 1:55 PM, Somnath Roy <Somnath.Roy@xxxxxxxxxxx> wrote: > Hi Greg, > Forgive my ignorance on this part if it is already discussed in the community. Could you please let me know if CephFS is supporting Erasure coded pool in the backend or not ? > If not, is there any plan of supporting this kind of configuration in near future ? You can set replicated cache pools, positioned as tiers over an EC pool, as data pools for CephFS. You cannot use EC pools directly for CephFS. We have no plans to add support for EC pools in the foreseeable future — since they have limited RADOS functionality we'd need to implement a whole log-structured file storage system or something. :( -Greg > > Thanks & Regards > Somnath > > ________________________________ > > PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies). > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" > in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo > info at http://vger.kernel.org/majordomo-info.html {.n + +% lzwm b 맲 r yǩ ׯzX ܨ} Ơz &j:+v zZ+ +zf h ~ i z w ? & )ߢf ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
