Jeff, With default compression enabled on each table, isn't there CRC files created along side with SSTables that can help detecting bit-rot ?
On Sat, Sep 9, 2017 at 7:50 PM, Jeff Jirsa <jji...@gmail.com> wrote: > Cassandra doesn't do that automatically - it can guarantee consistency on > read or write via ConsistencyLevel on each query, and it can run active > (AntiEntropy) repairs. But active repairs must be scheduled (by human or > cron or by third party script like http://cassandra-reaper.io/), and to > be pedantic, repair only fixes consistency issue, there's some work to be > done to properly address/support fixing corrupted replicas (for example, > repair COULD send a bit flip from one node to all of the others) > > > > -- > Jeff Jirsa > > > On Sep 9, 2017, at 1:07 AM, Ralph Soika <ralph.so...@imixs.com> wrote: > > Hi, > > I am searching for a big data storage solution for the Imixs-Workflow > project. I started with Hadoop until I became aware of the > 'small-file-problem'. So I am considering using Cassandra now. > > But Hadoop has one important feature for me. The replicator continuously > examines whether data blocks are consistent across all datanodes. This will > detect disk errors and automatically move data from defective blocks to > working blocks. I think this is called 'self-healing mechanism'. > > Is there a similar feature in Cassandra too? > > > Thanks for help > > Ralph > > > > -- > >
