Hi Pierre, As discussed today over the phone, I'm very much interested in trying to reuse the Mojette Transform implementation in the context of the work related to the implementation of an erasure coded backend in Ceph. The progress can be tracked from http://tracker.ceph.com/issues/5046 and the sub-tickets and the original discussion from the last Ceph summit is at http://wiki.ceph.com/01Planning/02Blueprints/Dumpling/Erasure_encoding_as_a_storage_backend I was reading the code of rbs_restore_one_rb_entry at https://github.com/rozofs/rozofs/blob/master/src/storaged/rbs.c#L104 and assumed the implementation is in https://github.com/rozofs/rozofs/blob/master/src/storaged/rbs_transform.h https://github.com/rozofs/rozofs/blob/master/src/storaged/rbs_transform.cc And also tried to understand http://en.wikipedia.org/wiki/Mojette_Transform and bought "The Mojette Transform: Theory and Applications" http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1848210809.html in the hope to get more sense out of it ;-) Is there a part of the rozofs code you would advise me to read first in order to understand how it works ? Cheers -- Loïc Dachary, Artisan Logiciel Libre All that is necessary for the triumph of evil is that good people do nothing.
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