[jira] [Updated] (CASSANDRA-13570) allow sub-range repairs (specifying -et -st) for a preview of repaired data

["Marcus Eriksson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-13570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcus Eriksson updated CASSANDRA-13570:
----------------------------------------
    Reviewer: Marcus Eriksson

> allow sub-range repairs (specifying -et -st) for a preview of repaired data
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-13570
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13570
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Matt Byrd
>            Assignee: Matt Byrd
>            Priority: Minor
>             Fix For: 4.x
>
>
> I don't see any inherent reason for restricting preview repairs of repaired data to not allow specifying start and end tokens. 
> The restriction seems to be coming from the fact that incremental=true in RepairOption, which is the case but it's not truly an incremental repair since we're only previewing.
> {code:java}
>         if (option.isIncremental() && !option.isGlobal())
>         {
>             throw new IllegalArgumentException("Incremental repairs cannot be run against a subset of tokens or ranges");
>         }
> {code}
> It would be helpful to allow this, so that operators could sequence a sweep over the entirety of the token-space in a more gradual fashion.
> Also it might help in examining which portions of the token-space differ.
> Can anyone see any reasons for not allowing this?
> I.e just changing the above to something like:
> {code:java}
>  if (option.isIncremental() && !option.getPreviewKind().isPreview() && !option.isGlobal())
>           {
>               throw new IllegalArgumentException("Incremental repairs cannot be run against a subset of tokens or ranges");
>           }
> {code}



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