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https://issues.apache.org/jira/browse/HBASE-16812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839121#comment-15839121
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Jingcheng Du commented on HBASE-16812:
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Thanks [~yuzhih...@gmail.com] for the comments.
bq. Can you clarify the above comment (for the case where delete marker does
not have this tag) ?
Sure.
In this patch, the delete markers are not dropped anymore in the major
compaction, and they will live until they are expired.
As you know, in a major compaction, the del markers will be written to mob
files. If we retain the delete markers, they will be written to the mob files
again and again. I add a tag for the delete marker to avoid this. If a delete
marker has such a tag, it is not flushed to mob files again, and otherwise it
is.
A new tag is not necessary? I am thinking of using the existing ref tag for the
delete marker to implement this. How do you think? Thanks.
> Clean up the locks in MOB
> -------------------------
>
> Key: HBASE-16812
> URL: https://issues.apache.org/jira/browse/HBASE-16812
> Project: HBase
> Issue Type: Task
> Reporter: Appy
> Assignee: Jingcheng Du
> Priority: Minor
> Attachments: HBASE-16812.master.001.patch, HBASE-16812.patch
>
>
> Clean up the locks in MOB.
> # Retain all the delete markers in mob-enabled columns until they are expired.
> # Remove the locks from major compaction of mob-enabled columns.
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