Hi Usman, Before the rebalancer was introduced one trick people used was to increase the replication on all the files in the system, wait for re-replication to complete, then decrease the replication to the original level. You can do this using hadoop fs -setrep.
Cheers, Tom On Thu, Jun 25, 2009 at 10:33 AM, Usman Waheed<usm...@opera.com> wrote: > Hi, > > One of our test clusters is running HADOOP 15.3 with replication level set > to 2. The datanodes are not balanced at all. > > Datanode_1: 52% > Datanode_2: 82% > Datanode_3: 30% > > 15.3 does not have the rebalancer capability, we are planning to upgrade but > not for now. > > If i take out Datanode_1 from the cluster (decommission for sometime) will > HADOOP balance so that Datanode_2 and Datanode_3 will even out to 56%? > Then i can re-introduce Datanode_1 back into the cluster. > > Comments/Suggestions please? > > Thanks, > Usman >
