[jira] [Commented] (CASSANDRA-2963) Add a convenient way to reset a node's schema

["Pavel Yaskevich (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-2963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179426#comment-13179426 ] 

Pavel Yaskevich commented on CASSANDRA-2963:
--------------------------------------------

What the patch does only addresses the part of the problem because even after schema and migrations gets truncated we still have old data and version in Schema. I suggest to reset schema version to INITIAL_VESION and announce that to the ring right after truncate is done which will request migration push to the node (the behavior of announce will be changed after CASSANDRA-1391). Also note that while node is in the process of such migration no reads or writes could be served.
                
> Add a convenient way to reset a node's schema
> ---------------------------------------------
>
>                 Key: CASSANDRA-2963
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2963
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Tools
>            Reporter: Brandon Williams
>            Assignee: Yuki Morishita
>            Priority: Minor
>              Labels: lhf
>             Fix For: 1.1
>
>         Attachments: 0001-Add-resetlocalschema-to-nodetool.patch, system_reset_schema.txt
>
>
> People often encounter a schema disagreement where just one node is out of sync.  To get it back in sync, they shutdown the node, move the Schema* and Migration* files out of the system ks, and then start it back up.  Rather than go through this process, it would be nice if you could just tell the node to reset its schema.

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