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https://issues.apache.org/jira/browse/CASSANDRA-13010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875472#comment-15875472
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Jeff Jirsa commented on CASSANDRA-13010:
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That's great to hear, [~alourie]!
There's a quick intro for [how to
contribute|http://cassandra.apache.org/doc/latest/development/patches.html] on
the site. I'm not sure how much guidance you need, but I'll try to give you a
REALLY quick intro - feel free to ask for more (or less) as appropriate:
{{nodetool}} is the general administrative tool that most cassandra operators
use. It connects to cassandra primarily using JMX.
{{nodetool compactionstats}} uses the {{CompactionManager}} MBean to call
[getCompactions|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/tools/nodetool/CompactionStats.java#L70]
, which basically [returns a list of
maps|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/compaction/CompactionManager.java#L1857]
(where the map comes from a
[CompactionInfo$Holder|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/compaction/CompactionInfo.java#L135]
) - you'll need to include the directory as an element in that map so that the
{{nodetool}} command can print it out nicely.
> nodetool compactionstats should say which disk a compaction is writing to
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-13010
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13010
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jon Haddad
> Labels: lhf
>
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