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From "Sylvain Lebresne (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1938) Use UUID as node identifiers in counters instead of IP addresses
Date Fri, 11 Feb 2011 17:09:57 GMT


Sylvain Lebresne updated CASSANDRA-1938:

    Attachment: 0003-Thrift-change-to-CfDef.patch

Rebased patch attached. I've also run more test, in particular some boostrap followed by decomission
with and without cleanup in between (and writing/reading counter during all this) and those
tests pass (they don't with current trunk). So confidence++ on this. 

> Use UUID as node identifiers in counters instead of IP addresses 
> -----------------------------------------------------------------
>                 Key: CASSANDRA-1938
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>             Fix For: 0.8
>         Attachments: 0001-Use-uuid-instead-of-IP-for-counters.patch, 0002-Merge-old-shard-locally.patch,
0003-Thrift-change-to-CfDef.patch, 1938_discussion
>   Original Estimate: 56h
>  Remaining Estimate: 56h
> The use of IP addresses as node identifiers in the partition of a given
> counter is fragile. Changes of the node's IP addresses can result in data
> loss. This patch proposes to use UUIDs instead.
> NOTE: this breaks the on-disk file format (for counters)

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