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https://issues.apache.org/jira/browse/CASSANDRA-825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12841227#action_12841227
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Jonathan Ellis commented on CASSANDRA-825:
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flushing is a lot of work, but creating a new segment (w/ new header) is not.

> Create an additional system keyspace to store KS definitions and migration 
> data.
> --------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-825
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-825
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Core
>            Reporter: Gary Dusbabek
>            Assignee: Gary Dusbabek
>            Priority: Minor
>             Fix For: 0.7
>
>         Attachments: 
> v2-0001-CASSANDRA-825-use-jug-for-TimeUUID-generation.txt, 
> v2-0002-dump-and-load-definition-tables.txt, 
> v2-0003-make-KSMetaData-immutable.txt, 
> v2-0004-push-cfid-generation-down-into-CFMetaData-getting-rid-.txt, 
> v2-0005-support-for-serializing-historical-cf-names.txt
>
>
> Create an additional system keyspace to store KS definitions and migration 
> data. 
> Tweak the internals so cassandra can optional load all definitions from 
> there, ignoring CF definitions in the xml.

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