Why do you want them in serial increasing order? -Sam On Tue, Jul 26, 2016 at 2:43 PM, Samuel Just <sj...@redhat.com> wrote:
> 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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