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https://issues.apache.org/jira/browse/HBASE-17172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15872973#comment-15872973
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Hudson commented on HBASE-17172:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2524 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2524/])
HBASE-17172 Optimize major mob compaction with _del files (tedyu: rev
d7325185ad2864ed8fc78bb362776648a75c951b)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/PartitionedMobCompactionRequest.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/PartitionedMobCompactor.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/mob/compactions/TestPartitionedMobCompactor.java
> Optimize mob compaction with _del files
> ---------------------------------------
>
> Key: HBASE-17172
> URL: https://issues.apache.org/jira/browse/HBASE-17172
> Project: HBase
> Issue Type: Improvement
> Components: mob
> Affects Versions: 2.0.0
> Reporter: huaxiang sun
> Assignee: huaxiang sun
> Fix For: 2.0.0
>
> Attachments: HBASE-17172-master-001.patch,
> HBASE-17172.master.001.patch, HBASE-17172.master.002.patch,
> HBASE-17172.master.003.patch
>
>
> Today, when there is a _del file in mobdir, with major mob compaction, every
> mob file will be recompacted, this causes lots of IO and slow down major mob
> compaction (may take months to finish). This needs to be improved. A few
> ideas are:
> 1) Do not compact all _del files into one, instead, compact them based on
> groups with startKey as the key. Then use firstKey/startKey to make each mob
> file to see if the _del file needs to be included for this partition.
> 2). Based on the timerange of the _del file, compaction for files after that
> timerange does not need to include the _del file as these are newer files.
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