[
https://issues.apache.org/jira/browse/CASSANDRA-7066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14599340#comment-14599340
]
Benedict commented on CASSANDRA-7066:
-------------------------------------
Thanks. I've pushed
[here|https://github.com/belliottsmith/cassandra/tree/7066-suggestions] some
further follow up suggestions. The most important are the comments around
{{LifecycleTransaction.doCommit()}}, which needs just a little more tweaking to
be safe.
bq. However, I don't see why we need to do this every time
It also isn't at all onerous. Let's just annotate the code with the fact we can
remove it in 4.0, and keep things nice and simple here. It's great to expunge
all of that old code with just a couple of simple replacing lines.
> Simplify (and unify) cleanup of compaction leftovers
> ----------------------------------------------------
>
> Key: CASSANDRA-7066
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7066
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Stefania
> Priority: Minor
> Labels: compaction
> Fix For: 3.x
>
> Attachments: 7066.txt
>
>
> Currently we manage a list of in-progress compactions in a system table,
> which we use to cleanup incomplete compactions when we're done. The problem
> with this is that 1) it's a bit clunky (and leaves us in positions where we
> can unnecessarily cleanup completed files, or conversely not cleanup files
> that have been superceded); and 2) it's only used for a regular compaction -
> no other compaction types are guarded in the same way, so can result in
> duplication if we fail before deleting the replacements.
> I'd like to see each sstable store in its metadata its direct ancestors, and
> on startup we simply delete any sstables that occur in the union of all
> ancestor sets. This way as soon as we finish writing we're capable of
> cleaning up any leftovers, so we never get duplication. It's also much easier
> to reason about.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
