[ https://issues.apache.org/jira/browse/HDFS-4861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rushabh S Shah updated HDFS-4861: --------------------------------- Status: Patch Available (was: Open) Added a new member variable in NetworkTopology.java called as numOfLiveRacks which will get the number of live Racks (i.e atleast 1 node in a rack will be 'In Service') In BlockPlacementPolicyDefault.getMaxNodesPerRack() method, I am using numOfLiveRacks to determine maxNodesPerRack instead of numOfRacks. > BlockPlacementPolicyDefault does not consider decommissioning racks > ------------------------------------------------------------------- > > Key: HDFS-4861 > URL: https://issues.apache.org/jira/browse/HDFS-4861 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Affects Versions: 2.1.0-beta, 0.23.7 > Reporter: Kihwal Lee > Assignee: Rushabh S Shah > Attachments: HDFS-4861.patch > > > getMaxNodesPerRack() calculates the max replicas/rack like this: > {code} > int maxNodesPerRack = (totalNumOfReplicas-1)/clusterMap.getNumOfRacks()+2; > {code} > Since this does not consider the racks that are being decommissioned and the > decommissioning state is only checked later in isGoodTarget(), certain blocks > are not replicated even when there are many racks and nodes. -- This message was sent by Atlassian JIRA (v6.2#6252)