There aren't that many tools I know to orchestrate repairs and we maintain a fork of Reaper, that was made by Spotify, and handles incremental repair : https://github.com/thelastpickle/cassandra-reaper
We just added Cassandra as storage back end (only postgres currently) in one of the branches, which should soon be merged to master. Le mer. 19 oct. 2016 19:03, Kant Kodali <k...@peernova.com> a écrit : Also any suggestions on a tool to orchestrate the incremental repair? Like say most commonly used Sent from my iPhone On Oct 19, 2016, at 9:54 AM, Alexander Dejanovski <a...@thelastpickle.com> wrote: Hi Kant, subrange is a form of full repair, so it will just split the repair process in smaller yet sequential pieces of work (repair is started giving a start and end token). Overall, you should not expect improvements other than having less overstreaming and better chances of success if your cluster is dense. You can try to use incremental repair if you know what the caveats are and use a proper tool to orchestrate it, that would save you from repairing all 10TB each time. CASSANDRA-12580 might help too as Romain showed us : https://www.mail-archive.com/user@cassandra.apache.org/msg49344.html Cheers, On Wed, Oct 19, 2016 at 6:42 PM Kant Kodali <k...@peernova.com> wrote: Another question on a same note would be what would be the fastest way to do repairs of size 10TB cluster ? Full repairs are taking days. So among repair parallel or repair sub range which is faster in the case of say adding a new node to the cluster? Sent from my iPhone On Oct 19, 2016, at 9:30 AM, Sean Bridges <sean.brid...@globalrelay.net> wrote: Hey, We are upgrading from cassandra 2.1 to cassandra 2.2. With cassandra 2.1 we would periodically repair all nodes, using the -pr flag. With cassandra 2.2, the same repair takes a very long time, as cassandra does an anti compaction after the repair. This anti compaction causes most (all?) the sstables to be rewritten. Is there a way to do full repairs without continually anti compacting? If we do a full repair on each node with the -pr flag, will subsequent full repairs also force anti compacting most (all?) sstables? Thanks, Sean -- ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com -- ----------------- Alexander Dejanovski France @alexanderdeja Consultant Apache Cassandra Consulting http://www.thelastpickle.com
