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https://issues.apache.org/jira/browse/HBASE-15786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anoop Sam John updated HBASE-15786:
-----------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
Pushed to master. Thanks for the reviews Stack & Ted.
> Create DBB backed MSLAB pool
> ----------------------------
>
> Key: HBASE-15786
> URL: https://issues.apache.org/jira/browse/HBASE-15786
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver
> Reporter: ramkrishna.s.vasudevan
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: HBASE-15786.patch, HBASE-15786_V2.patch,
> HBASE-15786_V2.patch, HBASE-15786_V3.patch, HBASE-15786_V4.patch,
> HBASE-15786_V5.patch, HBASE-15786_V6.patch
>
>
> We can make use of MSLAB pool for this off heap memstore.
> Right now one can specify the global memstore size (heap size) as a % of max
> memory using a config. We will add another config with which one can specify
> the global off heap memstore size. This will be exact size not as %. When off
> heap memstore in use, we will give this entire area for the MSLAB pool and
> that will create off heap chunks. So when cells are added to memstore, the
> cell data gets copied into the off heap MSLAB chunk spaces. Note that when
> the pool size is not really enough and we need additional chunk creation, we
> wont use off heap area for that. We dony want to create so many on demand
> DBBs.
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