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From "Kaide Mu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8928) Add downgradesstables
Date Fri, 11 Mar 2016 19:15:39 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15191399#comment-15191399
] 

Kaide Mu commented on CASSANDRA-8928:
-------------------------------------

Hi, dear Paulo.

I'd read such blog, I think now I'm clear with changes of Data.db in 3.x, I tried to find
something similar of changes on version 2.2 but I didn't find anything, do you have any similar
references or similar things, I'll try to see if I can breakdown it, but it seems quite difficult
in the sense that I'm not familiar with Cassandra code base. Also before jumping to draw up
the framework, I'd like to know is our purpose downgrade an existing SSTable to certain older
version or add the possibility to write older version of SSTable?

Regards.

> Add downgradesstables
> ---------------------
>
>                 Key: CASSANDRA-8928
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8928
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Tools
>            Reporter: Jeremy Hanna
>            Priority: Minor
>              Labels: gsoc2016, mentor
>
> As mentioned in other places such as CASSANDRA-8047 and in the wild, sometimes you need
to go back.  A downgrade sstables utility would be nice for a lot of reasons and I don't know
that supporting going back to the previous major version format would be too much code since
we already support reading the previous version.



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