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https://issues.apache.org/jira/browse/HBASE-16981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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huaxiang sun updated HBASE-16981:
---------------------------------
Release Note:
Mob compaction partition policy can be set by
hbase> create 't1', {NAME => 'f1', IS_MOB => true, MOB_THRESHOLD => 1000000,
MOB_COMPACT_PARTITION_POLICY => 'weekly'}
or
hbase> alter 't1', {NAME => 'f1', IS_MOB => true, MOB_THRESHOLD => 1000000,
MOB_COMPACT_PARTITION_POLICY => 'monthly'}
Available MOB_COMPACT_PARTITION_POLICY options are "daily", "weekly" and
"monthly", the default is "daily".
When it is "weekly" policy, the mob compaction will try to compact files within
one calendar week into one for a specific partition, similar for "daily" and
"monthly".
With "weekly" policy, one mob file normally is compacted twice during its
lifetime, for one region, there normally are 52 files for one year. With
"Monthly" policy, one mob file normally is compacted 3 times during its
lifetime and normally the are 12 files for one year.
> Expand Mob Compaction Partition policy from daily to weekly, monthly
> --------------------------------------------------------------------
>
> Key: HBASE-16981
> URL: https://issues.apache.org/jira/browse/HBASE-16981
> Project: HBase
> Issue Type: New Feature
> Components: mob
> Affects Versions: 2.0.0
> Reporter: huaxiang sun
> Assignee: huaxiang sun
> Fix For: 2.0.0
>
> Attachments: HBASE-16981.master.001.patch,
> HBASE-16981.master.002.patch, HBASE-16981.master.003.patch,
> HBASE-16981.master.004.patch, HBASE-16981.master.005.patch,
> HBASE-16981.master.006.patch, HBASE-16981.master.007.patch,
> HBASE-16981.master.008.patch,
> Supportingweeklyandmonthlymobcompactionpartitionpolicyinhbase.pdf
>
>
> Today the mob region holds all mob files for all regions. With daily
> partition mob compaction policy, after major mob compaction, there is still
> one file per region daily. Given there is 365 days in one year, at least 365
> files per region. Since HDFS has limitation for number of files under one
> folder, this is not going to scale if there are lots of regions. To reduce
> mob file number, we want to introduce other partition policies such as
> weekly, monthly to compact mob files within one week or month into one file.
> This jira is create to track this effort.
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