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From "Marcus Eriksson (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-5351) Avoid repairing already-repaired data by default
Date Sat, 22 Feb 2014 19:39:25 GMT


Marcus Eriksson updated CASSANDRA-5351:

    Attachment: 0001-keep-repairedAt-time-when-scrubbing-and-no-bad-rows-.patch

[~jbellis] - patch attached that fixes this, also adds the tools/bin/sstablerepairedset script
that i seem to have forgotten to add last time

> Avoid repairing already-repaired data by default
> ------------------------------------------------
>                 Key: CASSANDRA-5351
>                 URL:
>             Project: Cassandra
>          Issue Type: Task
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Lyuben Todorov
>              Labels: repair
>             Fix For: 2.1 beta1
>         Attachments: 0001-Incremental-repair-wip.patch, 0001-keep-repairedAt-time-when-scrubbing-and-no-bad-rows-.patch,
5351_node1.log, 5351_node2.log, 5351_node3.log, 5351_nodetool.log
> Repair has always built its merkle tree from all the data in a columnfamily, which is
guaranteed to work but is inefficient.
> We can improve this by remembering which sstables have already been successfully repaired,
and only repairing sstables new since the last repair.  (This automatically makes CASSANDRA-3362
much less of a problem too.)
> The tricky part is, compaction will (if not taught otherwise) mix repaired data together
with non-repaired.  So we should segregate unrepaired sstables from the repaired ones.

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