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From "Nick Bailey (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-3041) Move streams data to too many nodes.
Date Tue, 16 Aug 2011 21:45:36 GMT


Nick Bailey updated CASSANDRA-3041:

    Fix Version/s:     (was: 1.0)

Marking this for the next 0.8.x version since the data duplication caused by this bug is data
that does actually belong on the nodes, so it can't be removed by cleanup. It either has to
be unduplicated with a major compaction or rely on regular compaction.

> Move streams data to too many nodes.
> ------------------------------------
>                 Key: CASSANDRA-3041
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.7.8, 0.8.4
>            Reporter: Nick Bailey
>             Fix For: 0.8.5
> When you decommission a node, it only streams data to the node that is just now gaining
responsibility for the node's primary range.
> When you move a node it streams data to every node that is responsible for the node's
primary range. This is way more than it needs to, and could be bad in multi-dc setups. We
should absolutely use this bug as a chance/reason to better unify that code, since move should
be doing the same thing decom does.
> This might be worth backporting to 0.8 as well.

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