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https://issues.apache.org/jira/browse/HBASE-13103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Dimiduk updated HBASE-13103:
---------------------------------
Description:
Often enough, folks miss-judge split points or otherwise end up with a
suboptimal number of regions. We should have an automated, reliable way to
"reshape" or "balance" a table's region boundaries. This would be for tables
that contain existing data. This might look like:
{noformat}
Admin#reshapeTable(TableName, int numSplits);
{noformat}
or from the shell:
{noformat}
> reshape TABLE, numSplits
{noformat}
Better still would be to have a maintenance process, similar to the existing
Balancer that runs AssignmentManager on an interval, to run the above "reshape"
operation on an interval. That way, the cluster will automatically self-correct
toward a desirable state.
was:
Often enough, folks miss-judge split points or otherwise end up with a
suboptimal number of regions. We should have an automated, reliable way to
"reshape" or "balance" a table's region boundaries. This would be for tables
that contain existing data. This might look like:
{noformat}
Admin#reshapeTable(TableName, int numSplits);
{noformat}
or from the shell:
{noformat}
> reshape TABLE, numSplits
{noformat}
Summary: [ergonomics] add region size balancing as a feature of master
(was: [ergonomics] add shell,API to "reshape" a table)
> [ergonomics] add region size balancing as a feature of master
> -------------------------------------------------------------
>
> Key: HBASE-13103
> URL: https://issues.apache.org/jira/browse/HBASE-13103
> Project: HBase
> Issue Type: Brainstorming
> Components: Usability
> Reporter: Nick Dimiduk
>
> Often enough, folks miss-judge split points or otherwise end up with a
> suboptimal number of regions. We should have an automated, reliable way to
> "reshape" or "balance" a table's region boundaries. This would be for tables
> that contain existing data. This might look like:
> {noformat}
> Admin#reshapeTable(TableName, int numSplits);
> {noformat}
> or from the shell:
> {noformat}
> > reshape TABLE, numSplits
> {noformat}
> Better still would be to have a maintenance process, similar to the existing
> Balancer that runs AssignmentManager on an interval, to run the above
> "reshape" operation on an interval. That way, the cluster will automatically
> self-correct toward a desirable state.
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