Hi Eugene,
> If I have a time series data model, with TWCS compaction where I never > update rows and hence don't care about either of the above (the whole > SSTable just expires after a few days ), do I even need to run repairs? Probably not. I think you can go without repairs. Using only time series with TTL is fine as long as you don't delete anything. And TWCS is a very good fit as it will allow Cassandra to remove some expired SSTable without compacting the data. If consistency matters, use CL = LOCAL_QUORUM on Reads & Writes though. C*heers, ----------------------- Alain Rodriguez - @arodream - al...@thelastpickle.com France The Last Pickle - Apache Cassandra Consulting http://www.thelastpickle.com 2017-03-28 0:12 GMT+02:00 eugene miretsky <eugene.miret...@gmail.com>: > Hi, > > Trying to get some clarifications on this post: https://docs.datastax.co > m/en/cassandra/3.0/cassandra/operations/opsRepairNodesWhen.html > > As far as I understand it, repairs to account for the fact that nodes > could go down (for short of long period of time) > > The 2 main reasons for repairing are: > > 1. To make sure date is consistent > 2. To make sure tombstones don't creep back > > If I have a time series data model, with TWCS compaction where I never > update rows and hence don't care about either of the above (the whole > SSTable just expires after a few days ), do I even need to run repairs? >
