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https://issues.apache.org/jira/browse/CASSANDRA-17568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17525975#comment-17525975
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Tibor Repasi commented on CASSANDRA-17568:
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With this
[commit|https://github.com/apache/cassandra/pull/1580/commits/a759f9cb65bbd0a4620bcc7c6442a14e41507dd8]
I've added a raw implementation of an {{--list-orphans}} option which is
traversing all {{data_file_directories}} recursively in a depth of 2 and
listing all paths which are not known to be used for tables.
However, it does correctly list empty keyspace directories and dropped tables,
I have some objections:
# there is a {{system/_paxos_repair_state}} directory (I'm not familiar with)
which is always listed; probably we would need a static exclude list
# nodetool is a tool which is intended to interact with a Cassandra process via
JMX, this feature is interacting primarily with the filesystem
Therefore I don't really like this feature, it feels wrong, I would not unhappy
to revert it.
> Implement nodetool command to list data directories of existing tables
> ----------------------------------------------------------------------
>
> Key: CASSANDRA-17568
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17568
> Project: Cassandra
> Issue Type: New Feature
> Components: Tool/nodetool
> Reporter: Tibor Repasi
> Assignee: Tibor Repasi
> Priority: Normal
> Fix For: 4.x
>
> Time Spent: 9h
> Remaining Estimate: 0h
>
> When a table is created, dropped and re-created with the same name,
> directories remain within data paths. Operators may be challenged finding out
> which directories belong to existing tables and which may be subject to
> removal. However, the information is available in CQL as well as in MBeans
> via JMX, a convenient access to this information is still missing.
> My proposal is a new nodetool subcommand allowing to list data paths of all
> existing tables.
> {code}
> % bin/nodetool datapaths -- example
> Keyspace : example
> Table : test
> Paths :
>
> /var/lib/cassandra/data/example/test-02f5b8d0c0e311ecb327ff24df5ab301
> ----------------
> {code}
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