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https://issues.apache.org/jira/browse/HBASE-17343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anastasia Braginsky updated HBASE-17343:
----------------------------------------
Resolution: Fixed
Release Note:
This JIRA changes the default MemStore to be CompactingMemStore instead of
DefaultMemStore. In-memory compaction of CompactingMemStore demonstrated
sizable improvement in HBase’s write amplification and read/write performance.
CompactingMemStore achieves these gains through smart use of RAM. The algorithm
periodically re-organizes the in-memory data in efficient data structures and
reduces redundancies. The HBase server’s memory footprint therefore
periodically expands and contracts. The outcome is longer lifetime of data in
memory, less I/O, and overall faster performance. More details about the
algorithm and its use appear in the Apache HBase Blog:
https://blogs.apache.org/hbase/
How To Use:
The in-memory compaction level can be configured both globally and per column
family. The supported levels are none (DefaultMemStore), basic, and eager.
By default, all tables apply basic in-memory compaction. This global
configuration can be overridden in hbase-site.xml, as follows:
<property>
<name>hbase.hregion.compacting.memstore.type</name>
<value><none|basic|eager></value>
</property>
The level can also be configured in the HBase shell per column family, as
follows:
create ‘<tablename>’,
{NAME => ‘<cfname>’, IN_MEMORY_COMPACTION => ‘<NONE|BASIC|EAGER>’}
Status: Resolved (was: Patch Available)
> Make Compacting Memstore default in 2.0 with BASIC as the default type
> ----------------------------------------------------------------------
>
> Key: HBASE-17343
> URL: https://issues.apache.org/jira/browse/HBASE-17343
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Affects Versions: 2.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: Anastasia Braginsky
> Priority: Blocker
> Fix For: 2.0.0
>
> Attachments: HBASE-17343-V01.patch, HBASE-17343-V02.patch,
> HBASE-17343-V04.patch, HBASE-17343-V05.patch, HBASE-17343-V06.patch,
> HBASE-17343-V07.patch, HBASE-17343-V08.patch, HBASE-17343-V09.patch,
> ut.v1.patch
>
>
> FYI [~anastas], [~eshcar] and [~ebortnik].
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