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https://issues.apache.org/jira/browse/CASSANDRA-8720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17884803#comment-17884803
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Khoi Pham commented on CASSANDRA-8720:
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I have some questions about this tool. Is it safe to run this tool while
Cassandra is running? My main concern is what will happen when this tool is run
while a compaction is happening and the compaction is trying to delete old
sstable files. Will compaction be able to delete an sstable file while this
tool is reading it? What if the deletion goes through while the tool is
reading/about to read it? Will the tool fail or will it move to the next file?
Thank you
> Provide tools for finding wide row/partition keys
> -------------------------------------------------
>
> Key: CASSANDRA-8720
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8720
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Tools
> Reporter: J.B. Langston
> Assignee: Andres de la Peña
> Priority: Normal
> Fix For: 5.0-alpha1, 5.0
>
> Attachments: 8720.txt
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Multiple users have requested some sort of tool to help identify wide row
> keys. They get into a situation where they know a wide row/partition has been
> inserted and it's causing problems for them but they have no idea what the
> row key is in order to remove it.
> Maintaining the widest row key currently encountered and displaying it in
> cfstats would be one possible approach.
> Another would be an offline tool (possibly an enhancement to sstablekeys) to
> show the number of columns/bytes per key in each sstable. If a tool to
> aggregate the information at a CF-level could be provided that would be a
> bonus, but it shouldn't be too hard to write a script wrapper to aggregate
> them if not.
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