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https://issues.apache.org/jira/browse/CASSANDRA-3470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146176#comment-13146176
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Radim Kolar commented on CASSANDRA-3470:
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version number would be confusing because there is also sstable number
appended. Keep it simple.
Scrub on updates is fine, its quite fast operation. Compaction is worse.
> Add a second letter to Descriptor version
> -----------------------------------------
>
> Key: CASSANDRA-3470
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3470
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Yuki Morishita
> Priority: Minor
> Fix For: 1.0.3
>
>
> Versions g and h are actually forwards-compatible with version f, and more
> changes like that are easily forseeable (e.g., CASSANDRA-3407).
> It would be nice to have an extra version digit (h1, h2, ... ha, hb, ...).
> Otherwise our choices are forcing people to scrub for these changes
> (unacceptable) or not updating the Descriptor version, which is suboptimal
> since we don't know what the contents are until we try to read it and find
> the latest parts missing.
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