[ https://issues.apache.org/jira/browse/HBASE-13965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lei Chen updated HBASE-13965: ----------------------------- Attachment: HBASE-13965-v4.patch Updates: 1. "report" -> "reports" 2. costFunctionDesc added to JMX 3. Unnecessary table name length check is removed. 4. "lastSubcosts" -> "lastSubCosts" 5. total += this.lastSubCosts[i]; TODO: 1. Make hard-coded map size configurable? > Stochastic Load Balancer JMX Metrics > ------------------------------------ > > Key: HBASE-13965 > URL: https://issues.apache.org/jira/browse/HBASE-13965 > Project: HBase > Issue Type: Improvement > Components: Balancer, metrics > Reporter: Lei Chen > Assignee: Lei Chen > Attachments: HBASE-13965-v3.patch, HBASE-13965-v4.patch, > HBASE-13965_v2.patch, HBase-13965-v1.patch, > stochasticloadbalancerclasses_v2.png > > > Today’s default HBase load balancer (the Stochastic load balancer) is cost > function based. The cost function weights are tunable but no visibility into > those cost function results is directly provided. > A driving example is a cluster we have been tuning which has skewed rack size > (one rack has half the nodes of the other few racks). We are tuning the > cluster for uniform response time from all region servers with the ability to > tolerate a rack failure. Balancing LocalityCost, RegionReplicaRack Cost and > RegionCountSkew Cost is difficult without a way to attribute each cost > function’s contribution to overall cost. > What this jira proposes is to provide visibility via JMX into each cost > function of the stochastic load balancer, as well as the overall cost of the > balancing plan. -- This message was sent by Atlassian JIRA (v6.3.4#6332)