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https://issues.apache.org/jira/browse/HBASE-5199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13188891#comment-13188891
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Zhihong Yu commented on HBASE-5199:
-----------------------------------
This becomes interesting, Liyin.
Currently we have:
{code}
override = region.getCoprocessorHost().preCompactSelection(
this, candidates);
{code}
If I understand your idea correctly, a sub-list of candidates would be
extracted for deletion.
Do you think that we should expose selection of expired store files through
coprocessor ?
> Delete out of TTL store files before compaction selection
> ---------------------------------------------------------
>
> Key: HBASE-5199
> URL: https://issues.apache.org/jira/browse/HBASE-5199
> Project: HBase
> Issue Type: Improvement
> Reporter: Liyin Tang
> Assignee: Liyin Tang
> Attachments: D1311.1.patch, D1311.2.patch, D1311.3.patch
>
>
> Currently, HBase deletes the out of TTL store files after compaction. We can
> change the sequence to delete the out of TTL store files before selecting
> store files for compactions.
> In this way, HBase can keep deleting the old invalid store files without
> compaction, and also prevent from unnecessary compactions since the out of
> TTL store files will be deleted before the compaction selection.
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