What is your intended use case RBD/FS/RGW? There are no major improvements in Jewel that I am aware of. The big one will be when EC pools allow direct partial overwrites without the use of a cache tier. > -----Original Message----- > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of > Yoann Moulin > Sent: 09 March 2016 16:01 > To: ceph-users@xxxxxxxx > Subject: how to choose EC plugins and rulesets > > Hello, > > We are looking for recommendations and guidelines for using erasure codes > (EC) with Ceph. > > Our setup consists of 25 identical nodes which we dedicate to Ceph. Each > node contains 10 HDDs (full specs below) > > We started with 10 nodes (comprising 100 OSDs) and created a pool with 3- > times replication. > > In order to increase the usable capacity, we would like to go for EC instead of > replication. > > - Can anybody share with us recommendations regarding the choice of > plugins and rulesets? > - In particular, how do we relate to the number of nodes and OSDs? Any > formulas or rules of thumb? > - Is it possible to change rulesets live on a pool? > > We currently use Infernalis but plan to move to Jewel. > > - Are there any improvement in Jewel with regard to erasure codes? > > Looking forward for your answers. > > > ===== > > Full specs of nodes > > CPU: 2 x Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz > Memory: 128GB of Memory > OS Storage: 2 x SSD 240GB Intel S3500 DC (raid 1) Journal Storage: 2 x SSD > 400GB Intel S3300 DC (no Raid) OSD Disk: 10 x HGST ultrastar-7k6000 6TB > Network: 1 x 10Gb/s > OS: Ubuntu 14.04 > > -- > Yoann Moulin > EPFL IC-IT > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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