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From "sankalp kohli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12180) Should be able to override compaction space check
Date Mon, 18 Jul 2016 19:48:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15382933#comment-15382933
] 

sankalp kohli commented on CASSANDRA-12180:
-------------------------------------------

min free space is helpful as we dont want drives to go all way to 100% full. Also with SSDs,
the performance goes down as disk reaches full capacity. 

> Should be able to override compaction space check
> -------------------------------------------------
>
>                 Key: CASSANDRA-12180
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12180
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Assignee: sankalp kohli
>            Priority: Trivial
>         Attachments: CASSANDRA-12180_3.0.txt
>
>
> If there's not enough space for a compaction it won't do it and print the exception below.
Sometimes we know compaction will free up lot of space since an ETL job could have inserted
a lot of deletes. This override helps in this case. 
> ERROR [CompactionExecutor:17] CassandraDaemon.java (line 258) Exception in thread Thread
> [CompactionExecutor:17,1,main]
> java.lang.RuntimeException: Not enough space for compaction, estimated sstables = 1552,
expected
> write size = 260540558535
> at org.apache.cassandra.db.compaction.CompactionTask.checkAvailableDiskSpace
> (CompactionTask.java:306)
> at org.apache.cassandra.db.compaction.CompactionTask.runMayThrow(CompactionTask.
> java:106)
> at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
> at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.
> java:60)
> at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.
> java:59)
> at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run
> (CompactionManager.java:198)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)



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