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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Created: (CASSANDRA-193) Proactive repair
Date Thu, 21 May 2009 19:48:45 GMT
Proactive repair

                 Key: CASSANDRA-193
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Jonathan Ellis
             Fix For: 0.4

Currently cassandra supports "read repair," i.e., lazy repair when a read is done.  This is
better than nothing but is not sufficient for some cases (e.g. catastrophic node failure where
you need to rebuild all of a node's data on a new machine).

Dynamo uses merkle trees here.  This is harder for Cassandra given the CF data model but I
suppose we could just hash the serialized CF value.

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