Oh and we're running 0.8.4 and the RF is 3. On Sep 10, 2011, at 3:49 PM, Jeremy Hanna wrote:
> 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 >
