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From "C. Scott Andreas (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-14291) Nodetool command to recreate SSTable components
Date Sat, 17 Nov 2018 17:25:00 GMT


C. Scott Andreas updated CASSANDRA-14291:
    Component/s: Tools

> Nodetool command to recreate SSTable components
> -----------------------------------------------
>                 Key: CASSANDRA-14291
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Kurt Greaves
>            Assignee: Alexander Ivakov
>            Priority: Minor
>              Labels: 4.0-feature-freeze-review-requested
> 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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