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https://issues.apache.org/jira/browse/HBASE-3609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004911#comment-13004911
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Ted Yu commented on HBASE-3609:
-------------------------------
Depending on the chosen policy, I plan to introduce interface,
RegionPlanHolder, which abstracts the concrete data structures holding
RegionPlans:
{code}
interface RegionPlanHolder {
RegionPlanHolder create();
int size();
void add(RegionPlan rp);
// removes the head element
RegionPlan remove();
// removes the tail element
RegionPlan removeLast();
// retrieves element at index
RegionPlan get(int index);
}
{code}
Then regionsToMove would be declared as RegionPlanHolder so that implementation
detail such as the following would be hidden in balanceCluster().
{code}
MinMaxPriorityQueue<RegionPlan> regionsToMove =
MinMaxPriorityQueue.orderedBy(rpComparator).create();
{code}
> Improve the selection of regions to balance; part 2
> ---------------------------------------------------
>
> Key: HBASE-3609
> URL: https://issues.apache.org/jira/browse/HBASE-3609
> Project: HBase
> Issue Type: Improvement
> Reporter: stack
> Assignee: Ted Yu
> Attachments: 3609-alternate.txt, hbase-3609-by-region-age.txt,
> hbase-3609.txt
>
>
> See 'HBASE-3586 Improve the selection of regions to balance' for discussion
> of algorithms that improve on current random assignment.
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