[jira] [Created] (CASSANDRA-9702) Repair running really slow

["mlowicki (JIRA)" <ji...@apache.org>]

mlowicki created CASSANDRA-9702:
-----------------------------------

             Summary: Repair running really slow
                 Key: CASSANDRA-9702
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9702
             Project: Cassandra
          Issue Type: Bug
         Environment: C* 2.1.7, Debian Wheezy
            Reporter: mlowicki
         Attachments: db1.system.log

We're using 2.1.x since the very beginning and we always had problem with failing or slow repair. In one data center we aren't able to finish repair for many weeks (partially because CASSANDRA-9681 as we needed to reboot nodes periodically).

I've launched it today morning (12 hours now) and monitor using https://github.com/spotify/cassandra-opstools/blob/master/bin/spcassandra-repairstats. For the first hour it progressed to 9.43% but then it took ~10 hours to reach 9.44%. I see very rarely logs related to repair (each 15-20 minutes but sometimes nothing new for 1 hour).

Repair launched with:
{code}
nodetool repair --partitioner-range --parallel --in-local-dc {keyspace}
{code}

Attached log file from today.



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