How would such a code work if there were more than 24 osds? -Sam On Tue, Jul 26, 2016 at 2:37 PM, Syed Hussain <syed...@gmail.com> wrote:
> Hi, > > I'm working to develop an Erasure Code plugin (variation of ISA) that have > typical requirement that the active set of the Erasure Coded pool in serial > order. > For example, > > ==================================================================================================== > >ceph osd erasure-code-profile set reed_k16m8_isa k=16 m=8 plugin=isa > technique=reed_sol_van ruleset-failure-domain=osd > >ceph osd pool create reed_k16m8_isa_pool 128 128 erasure reed_k16m8_isa > >echo "ABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHI" | rados > --pool reed_k16m8_isa_pool put myobj16_8 - > >ceph osd map reed_k16m8_isa_pool myobj16_8 > osdmap e86 pool 'reed_k16m8_isa_pool' (1) object 'myobj16_8' -> pg > 1.cf6ec86f (1.6f) -> up > ([4,23,22,10,9,11,15,6,19,1,7,8,17,21,16,14,18,12,13,20,3,5,0,2], p4) > acting ([4,23,22,10,9,11,15,6,19,1,7,8,17,21,16,14,18,12,13,20,3,5,0,2], p4) > > ==================================================================================================== > > That means the chunks 0, 1, 2, ...23 of the erasure coding are saved int > osd 4, 23, 22, 10, ...2 respectively as per the order given in the active > set. > > Now my question is how I'll be able to get the PG map for object myobj16_8 > having active set as: [0, 1, 2, ...23] so that the i-th chunk of the > Erasure Coded object saves into > i-th osd. > > Is there any option available in "ceph osd pool create" to do it? > Or there may be other way available to accomplish this case. > > Appreciate your suggestions.. > > Thanks, > Syed Hussain > NetWorld > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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