Kurt Greaves created CASSANDRA-14291:
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             Summary: Nodetool command to recreate SSTable components
                 Key: CASSANDRA-14291
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14291
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Kurt Greaves


Need a JMX/Nodetool command to recreate components for SSTables without 
re-writing the data files.

Possible implementation idea:
Create a {{nodetool (recreate|regen)component}} command that would enable you 
to recreate  specific components of an SSTable, and also allow specifying 
SSTables or columnfamilies.
I'd say a flag for a list of components and a flag for SSTables with 
keyspace.columnfamilies as positional arguments would work

Alternatively this could become part of upgradesstables, but would likely make 
that command a bit bloated.

Background:
In CASSANDRA-11163 we changed it so summaries and bloomfilters were not 
regenerated or persisted on startup. This means we would rely on 
compactions/upgrades to regenerate the bloomfilter (or other components) after 
a configuration change. While this works, it's pretty inefficient on large 
tables just because you changed the bloomfilter size or summary chunk sizes.



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