Rodney, A couple of weeks back we did an analysis of implementing R-S translator for m+n redundancy. One of our strategies (probably not the best) was to have it work like an extended stripe translator, where the scope of each checksum domain is a file. Some subvolumes contain file stripe chunks, and some subvolumes contain polynomial checksums across the chunks. Flip sides - 1. The computation is pretty high for this implementation 2. Even though the storage is not N-fold extra, write traffic is actually N-fold extra. Implementation is surely possible, with the performance impacts. We also have not seen a big need to bring it up in our priority list, but it is surely something we would like to have in the future. avati 2008/4/24 Rodney McDuff <mcduff@xxxxxxxxxxxxx>: > I was just looking at the GlusterFS Roadmap and thought that a nifty > feature for the future would be an AFR-like translator that uses > Reed-Solomon erasures codes instead for file replication. That would add > many 9s to the reliability without adding much storage overhead. > > > -- > Dr. Rodney G. McDuff |Ex ignorantia ad sapientiam > Manager, Strategic Technologies Group| Ex luce ad tenebras > Information Technology Services | > The University of Queensland | > EMAIL: mcduff@xxxxxxxxxxxxx | > TELEPHONE: +61 7 3365 8220 | > > > > _______________________________________________ > Gluster-devel mailing list > Gluster-devel@xxxxxxxxxx > http://lists.nongnu.org/mailman/listinfo/gluster-devel > -- If I traveled to the end of the rainbow As Dame Fortune did intend, Murphy would be there to tell me The pot's at the other end.
