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From "Kaide Mu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11875) Create sstableconvert tool with support to ma format
Date Sat, 28 May 2016 10:45:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15305295#comment-15305295
] 

Kaide Mu commented on CASSANDRA-11875:
--------------------------------------

Just unified things into SSTableConverter and StandaloneConverter.

Also added a new Test suit SSTableConversionTest, but it has some problem when performing
conversion.
{{ERROR 10:39:13 Attempting to load already loaded table SSTableRewriterTest.Standard1}}

[Patch|https://github.com/kdmu/cassandra/commit/e8637a531e874310a49bc5dff71c94b8841c2e09]
(pushed to trunk instead of a temporary working branch, will fix it)

> Create sstableconvert tool with support to ma format
> ----------------------------------------------------
>
>                 Key: CASSANDRA-11875
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11875
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Tools
>            Reporter: Paulo Motta
>            Assignee: Kaide Mu
>            Priority: Minor
>         Attachments: trunk-11875-WIP-V1.patch
>
>
> Currently {{Upgrader}} receives an sstable in any readable format, and writes into {{BigFormat.getLatestVersion()}}.
We should generalize it by making it receive a {{target}} version and probably also rename
it to {{SSTableConverter}}. 
> Based on this we can create an {{StandaloneDowngrader}} tool which will perform downgrade
of specified sstables to a target version. To start with, we should support only downgrading
to {{ma}} format (from current format {{mb}}), downgrade to any other version should be forbidden.
Since we already support serializing to "ma" we will not need to do any data conversion.
> We should also create a test suite that creates an sstable with data in the current format,
perform the downgrade, and verify data in the new format is correct. This will be the base
tests suite for more advanced conversions in the future.



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