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https://issues.apache.org/jira/browse/HBASE-14272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731580#comment-14731580
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Vladimir Rodionov commented on HBASE-14272:
-------------------------------------------
OK, if KEEP_DELETED_CELLS is TRUE/TTL, the only way to remove deleted cells
when TTL expires and we have only one store file (quite rare condition) is to
trigger major compaction manually
If # of store files == 1, KEEP_DELETED_CELLS = TRUE/TTL, periodic major
compaction will never pick this file up if its locality is above threshold.
The same is true for *hbase.hstore.time.to.purge.deletes* > 0. If we add these
checks into CompactionPolicy implementation, we will need to keep somewhere
flag - FILE_IS_CLEAN, otherwise we will be running major compaction on a single
file every time major compaction interval elapses.
Not sure it is worth doing. Close it as Invalid/Won't fix? What do you think
[~lhofhansl]?
> Enforce major compaction on stores with KEEP_DELETED_CELLS=true
> ---------------------------------------------------------------
>
> Key: HBASE-14272
> URL: https://issues.apache.org/jira/browse/HBASE-14272
> Project: HBase
> Issue Type: Bug
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Fix For: 2.0.0
>
> Attachments: HBASE-14272-v2.patch, HBASE-14272.patch
>
>
> Currently, if store has one (major compacted) file, the only case when major
> compaction will be triggered for this file again - when locality is below
> threshold, defined by *hbase.hstore.min.locality.to.skip.major.compact* or
> TTL expired some cells. If file has locality greater than this threshold it
> will never be major compacted until Store's TTL kicks in. For CF with
> KEEP_DELETED_CELLS on, compaction must be enabled always (even for single
> file), regardless of locality, when deleted cells are expired
> (*hbase.hstore.time.to.purge.deletes*)
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