[jira] [Commented] (CASSANDRA-4049) Add SSTable components required by new DSE CFS compaction strategy

["Stu Hood (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13229641#comment-13229641 ] 

Stu Hood commented on CASSANDRA-4049:
-------------------------------------

I'd prefer that if different compaction strategies are going to require different components, we allow them to specify their components in a pluggable fashion, so that we can appropriately clean up one strategy and apply another, rather than leaving the files around unnecessarily.
                
> Add SSTable components required by new DSE CFS compaction strategy
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-4049
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4049
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Piotr Kołaczkowski
>            Priority: Minor
>         Attachments: component_patch.diff
>
>
> CFS compaction strategy coming up in the next DSE release needs to store some important information in Tombstones.db and RemovedKeys.db files, one per sstable. However, currently Cassandra issues warnings when these files are found in the data directory. Additionally, when switched to SizeTieredCompactionStrategy, the files are left in the data directory after compaction.
> The attached patch adds new components to the Component class so Cassandra knows about those files.

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