In addition, the mutation stage and the read stage are backed up like: Pool Name Active Pending Blocked ReadStage 32 773 0 RequestResponseStage 0 0 0 ReadRepairStage 0 0 0 MutationStage 158 525918 0 ReplicateOnWriteStage 0 0 0 GossipStage 0 0 0 AntiEntropyStage 0 0 0 MigrationStage 0 0 0 StreamStage 0 0 0 MemtablePostFlusher 1 5 0 FILEUTILS-DELETE-POOL 0 0 0 FlushWriter 2 5 0 MiscStage 0 0 0 FlushSorter 0 0 0 InternalResponseStage 0 0 0 HintedHandoff 0 0 0 CompactionManager n/a 29 MessagingService n/a 0,34
On Sep 10, 2011, at 3:38 PM, Jeremy Hanna wrote: > We are experiencing massive writes to column families when only doing reads > from Cassandra. A set of 5 hadoop jobs are reading from Cassandra and then > writing out to hdfs. That is the only thing operating on the cluster. We > are reading at CL.QUORUM with hadoop and have written with CL.QUORUM. Read > repair chance is set to 0.0 on all column families. However, in the logs, > I'm seeing flush after flush of memtables and compactions taking place. Is > there something else that would be writing based on the above description? > > Jeremy
