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Posted to commits@cassandra.apache.org by "Philip Thompson (JIRA)" <ji...@apache.org> on 2015/06/29 18:21:04 UTC
[jira] [Commented] (CASSANDRA-9657) Hint table doing unnecessary
compaction
[ https://issues.apache.org/jira/browse/CASSANDRA-9657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14605836#comment-14605836 ]
Philip Thompson commented on CASSANDRA-9657:
--------------------------------------------
[~iamaleksey], is this expected behavior?
> Hint table doing unnecessary compaction
> ---------------------------------------
>
> Key: CASSANDRA-9657
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9657
> Project: Cassandra
> Issue Type: Bug
> Environment: 2.1.7
> Reporter: Jan Karlsson
> Priority: Minor
> Fix For: 2.1.x
>
>
> I found some really strange behaviour. During the replay of a node I found this in the log:
> {code}INFO [CompactionExecutor:7] CompactionTask.java:271 Compacted 1 sstables to [/var/lib/cassandra/data/system/hints-2666e20573ef38b390fefecf96e8f0c7/system-hints-ka-120,]. 452,150,727 bytes to 452,150,727 (~100% of original) in 267,588ms = 1.611449MB/s. 1 total partitions merged to 1. Partition merge counts were {1:1, }{code}
> This happened multiple times until the hint replay was completed and the sstables were removed.
> I tried to replicate this by just starting up a cluster in ccm and killing a node for a few minutes. I got the same behaviour then.
> {Code}
> INFO [CompactionExecutor:2] CompactionTask.java:270 - Compacted 1 sstables to [/home/ejankan/.ccm/hint/node3/data/system/hints-2666e20573ef38b390fefecf96e8f0c7/system-hints-ka-2,]. 65,570 bytes to 65,570 (~100% of original) in 600ms = 0.104221MB/s. 1 total partitions merged to 1. Partition merge counts were {1:1, }
> {Code}
> It seems weird to me that the file does not decrease in size.
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