[ https://issues.apache.org/jira/browse/HDFS-3377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ashish Singhi resolved HDFS-3377. --------------------------------- Resolution: Invalid > While Balancing more than 10 Blocks are being moved from one DN even though > the maximum number of blocks to be moved in an iterations is hard coded to 5 > -------------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-3377 > URL: https://issues.apache.org/jira/browse/HDFS-3377 > Project: Hadoop HDFS > Issue Type: Bug > Components: balancer > Affects Versions: 2.0.0-alpha > Reporter: J.Andreina > > Replication factor= 1,block size is default value > Step 1: Start NN,DN1 > Step 2: Pump 5 GB of data. > Step 3: Start DN2 and issue balancer with threshold value 1 > In the balancer report and the NN logs displays that more than 8 blocks are > being moved from DN1 to DN2 in one iterations But MAX_NUM_CONCURRENT_MOVES in > one iterations is hard coded to 5. > Balancer report for 1st iteration: > ================================= > {noformat} > HOST-XX-XX-XX-XX:/home/Andreina/NewHadoop2nd/hadoop-2.0.0-SNAPSHOT/bin # > ./hdfs balancer -threshold 1 > 12/05/03 17:31:28 INFO balancer.Balancer: Using a threshold of 1.0 > 12/05/03 17:31:28 INFO balancer.Balancer: namenodes = > [hdfs://HOST-XX-XX-XX-XX:9002] > 12/05/03 17:31:28 INFO balancer.Balancer: p = > Balancer.Parameters[BalancingPolicy.Node, threshold=1.0] > Time Stamp Iteration# Bytes Already Moved Bytes Left To Move > Bytes Being Moved > 12/05/03 17:31:30 INFO net.NetworkTopology: Adding a new node: > /datacenter1/rack1/YY.YY.YY.YY:50176 > 12/05/03 17:31:30 INFO net.NetworkTopology: Adding a new node: > /datacenter1/rack1/XX.XX.XX.XX:50076 > 12/05/03 17:31:30 INFO balancer.Balancer: 1 over-utilized: > [Source[XX.XX.XX.XX:50076, utilization=5.018416429773605]] > 12/05/03 17:31:30 INFO balancer.Balancer: 1 underutilized: > [BalancerDatanode[YY.YY.YY.YY:50176, utilization=3.272819804269012E-5]] > 12/05/03 17:31:30 INFO balancer.Balancer: Need to move 1.06 GB to make the > cluster balanced. > 12/05/03 17:31:30 INFO balancer.Balancer: Decided to move 716.13 MB bytes > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 > 12/05/03 17:31:30 INFO balancer.Balancer: Will move 716.13 MB in this > iteration > May 3, 2012 5:31:30 PM 0 0 KB 1.06 GB > 716.13 MB > 12/05/03 17:35:29 INFO balancer.Balancer: Moving block -5275260117334749945 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:36:31 INFO balancer.Balancer: Moving block -8079758341763366944 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:37:12 INFO balancer.Balancer: Moving block -7395554712490186313 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:37:45 INFO balancer.Balancer: Moving block 7805443002654525130 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:38:15 INFO balancer.Balancer: Moving block 1864290085256894184 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:40:30 INFO balancer.Balancer: Moving block 23322655230037442 from > XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is succeeded. > 12/05/03 17:41:24 INFO balancer.Balancer: Moving block -8839566903692469634 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:43:03 INFO balancer.Balancer: Moving block 7304385435779271887 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:43:48 INFO balancer.Balancer: Moving block -7242009026552182303 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:44:06 INFO balancer.Balancer: Moving block -2449309138254106767 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:44:55 INFO balancer.Balancer: Moving block 500930296233438046 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded. > 12/05/03 17:45:04 INFO balancer.Balancer: Moving block 2642725820310610865 > from XX.XX.XX.XX:50076 to YY.YY.YY.YY:50176 through XX.XX.XX.XX:50076 is > succeeded.{noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira