hi Loic, I did not receive any email with confirmation instructions from jerasure.org. Thanks, Myna On Mon, Apr 3, 2017 at 10:20 PM, Loic Dachary <loic@xxxxxxxxxxx> wrote: > Hi, > > > On 04/03/2017 06:42 PM, Myna V wrote: >> Hi Loic, >> >> Thanks a lot for the reply. It somehow ended up in my spam. I tried >> signing up on the jerasure upstream code page. But couldn't get any >> response. > > Do you mean jerasure.org was down ? > > Cheers > >> >> We are working on implementing coupled layer MSR code (issue 19278). >> It is an MDS array code with optimal(minimal most) network, disk >> traffic use during chunk repair. >> >> Please look at our pull request ( >> https://github.com/ceph/ceph/pull/14300 ) when you get a chance. We >> introduced two new functions jerasure_matrix_decode_substripe, >> jerasure_matrix_dotprod_substripe as private functions in >> ErasureCodeJerasureCLMSR. >> >> Consider that an object is divided in to 4 parts(chunk 0, 1, 2, 3) and >> encoded to get 2 parts (chunk 4,5). We introduce a notion of subchunk, >> substripe, where in a chunk is divided in to 8 sub chunks below. Each >> column in the below picture corresponds to a substripe and the 4 rows >> together correspond to data coming from a stripe. >> >> |--|--|--|--|--|--|--|--| --> chunk 0 with 8 subchunks. >> |--|--|--|--|--|--|--|--| --> chunk 1 >> |--|--|--|--|--|--|--|--| --> chunk 2 >> |--|--|--|--|--|--|--|--| --> chunk 3 >> |--|--|--|--|--|--|--|--| --> chunk 4 >> |--|--|--|--|--|--|--|--| --> chunk 5 >> >> The new api's restrict the operations to a particular substripe. We >> would like to know your comments on including these functions as part >> of ErasureCodeJerasureCLMSR instead of them being included in >> jerasure.h. >> >> Thanks, >> Myna >> >> >> On Mon, Mar 27, 2017 at 10:17 PM, Loic Dachary <loic@xxxxxxxxxxx> wrote: >>> Hi Myna, >>> >>> On 03/27/2017 06:19 PM, Myna V wrote: >>>> Hello All, >>>> >>>> How do I push changes to ceph/jerasure.git ? Is it the same as the >>>> procedure needed for ceph/ceph.git ? >>> >>> The upstream for jerasure is at http://jerasure.org/groups/jerasure >>> >>> Cheers >>> >>>> >>>> Thanks, >>>> Myna. >>>> -- >>>> 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 >>>> >>> >>> -- >>> Loïc Dachary, Artisan Logiciel Libre >> -- >> 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 >> > > -- > Loïc Dachary, Artisan Logiciel Libre -- 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
