Guanghao Zhang created HBASE-14604: -------------------------------------- Summary: Improve MoveCostFunction in StochasticLoadBalancer Key: HBASE-14604 URL: https://issues.apache.org/jira/browse/HBASE-14604 Project: HBase Issue Type: Bug Components: Balancer Reporter: Guanghao Zhang Assignee: Guanghao Zhang
The code in MoveCoseFunction: {code} return scale(0, cluster.numRegions + META_MOVE_COST_MULT, moveCost); {code} It uses cluster.numRegions + META_MOVE_COST_MULT as the max value when scale moveCost to [0,1]. But this should use maxMoves as the max value when cluster have a lot of regions. Assume a cluster have 10000 regions, maxMoves is 2500, it only scale moveCost to [0, 0.25]. Improve moveCost by use maxMoves. {code} return scale(0, Math.min(cluster.numRegions, maxMoves) + META_MOVE_COST_MULT, moveCost); {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)