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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5911) Commit logs are not removed after nodetool flush or nodetool drain
Date Tue, 29 Oct 2013 15:06:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13808059#comment-13808059
] 

Jonathan Ellis commented on CASSANDRA-5911:
-------------------------------------------

Suspect it started when we dropped the CL header and moved to flush-position-in-sstable-metadata,
whenever that was.

> Commit logs are not removed after nodetool flush or nodetool drain
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-5911
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5911
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: J.B. Langston
>            Assignee: Vijay
>            Priority: Minor
>             Fix For: 2.0.3
>
>         Attachments: 0001-5911-v2.patch, 0001-CASSANDRA-5911.patch, 6528_140171_knwmuqxe9bjv5re_system.log
>
>
> Commit logs are not removed after nodetool flush or nodetool drain. This can lead to
unnecessary commit log replay during startup.  I've reproduced this on Apache Cassandra 1.2.8.
 Usually this isn't much of an issue but on a Solr-indexed column family in DSE, each replayed
mutation has to be reindexed which can make startup take a long time (on the order of 20-30
min).
> Reproduction follows:
> {code}
> jblangston:bin jblangston$ ./cassandra > /dev/null
> jblangston:bin jblangston$ ../tools/bin/cassandra-stress -n 20000000 > /dev/null
> jblangston:bin jblangston$ du -h ../commitlog
> 576M	../commitlog
> jblangston:bin jblangston$ nodetool flush
> jblangston:bin jblangston$ du -h ../commitlog
> 576M	../commitlog
> jblangston:bin jblangston$ nodetool drain
> jblangston:bin jblangston$ du -h ../commitlog
> 576M	../commitlog
> jblangston:bin jblangston$ pkill java
> jblangston:bin jblangston$ du -h ../commitlog
> 576M	../commitlog
> jblangston:bin jblangston$ ./cassandra -f | grep Replaying
>  INFO 10:03:42,915 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566761.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566762.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566763.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566764.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566765.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566766.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566767.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566768.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566769.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566770.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566771.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566772.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566773.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566774.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566775.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566776.log, /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566777.log,
/opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566778.log
>  INFO 10:03:42,922 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566761.log
>  INFO 10:03:43,907 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566762.log
>  INFO 10:03:43,907 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566763.log
>  INFO 10:03:43,907 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566764.log
>  INFO 10:03:43,908 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566765.log
>  INFO 10:03:43,908 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566766.log
>  INFO 10:03:43,908 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566767.log
>  INFO 10:03:43,909 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566768.log
>  INFO 10:03:43,909 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566769.log
>  INFO 10:03:43,909 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566770.log
>  INFO 10:03:43,910 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566771.log
>  INFO 10:03:43,910 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566772.log
>  INFO 10:03:43,911 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566773.log
>  INFO 10:03:43,911 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566774.log
>  INFO 10:03:43,911 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566775.log
>  INFO 10:03:43,912 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566776.log
>  INFO 10:03:43,912 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566777.log
>  INFO 10:03:43,912 Replaying /opt/apache-cassandra-1.2.8/commitlog/CommitLog-2-1377096566778.log
> {code}



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