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https://issues.apache.org/jira/browse/CASSANDRA-13994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17074276#comment-17074276
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Dinesh Joshi commented on CASSANDRA-13994:
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[~e.dimitrova] since this might be a complex change, it would be important to
get started with this sooner than later as it might require longer review
cycles.
[~ifesdjeen] we definitely need to be careful. Since both [~e.dimitrova] and I
could benefit from your experience, it would be great to have you as a second
reviewer and if you'd like, please add any additional pointers for the changes
you'd expect as part of the ticket.
> Remove COMPACT STORAGE internals before 4.0 release
> ---------------------------------------------------
>
> Key: CASSANDRA-13994
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13994
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Local Write-Read Paths
> Reporter: Alex Petrov
> Assignee: Ekaterina Dimitrova
> Priority: Low
> Fix For: 4.0, 4.0-rc
>
>
> 4.0 comes without thrift (after [CASSANDRA-11115]) and COMPACT STORAGE (after
> [CASSANDRA-10857]), and since Compact Storage flags are now disabled, all of
> the related functionality is useless.
> There are still some things to consider:
> 1. One of the system tables (built indexes) was compact. For now, we just
> added {{value}} column to it to make sure it's backwards-compatible, but we
> might want to make sure it's just a "normal" table and doesn't have redundant
> columns.
> 2. Compact Tables were building indexes in {{KEYS}} mode. Removing it is
> trivial, but this would mean that all built indexes will be defunct. We could
> log a warning for now and ask users to migrate off those for now and
> completely remove it from future releases. It's just a couple of classes
> though.
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