Bulk Operation

HDFS-8825 Balancer should not terminate if only one of the namenodes has error

HDFS-8825 Document -source option for balancer

HDFS-8825 Balancer#Parameters class could use a builder pattern

HDFS-8825 Add an option to Balancer for specifying the k-most over-utilized DNs or all over-utilized DNs as sources.

HDFS-8825 Allow admin to specify which blockpools the balancer should run on

HDFS-8825 Make hard coded parameters used by balancer and other tools configurable

HDFS-8825 Optimize the wait time in Balancer for federation scenario

HDFS-8825 Add DN metrics for balancer and other block movement scenarios

HDFS-8825 Balancer may not move blocks efficiently in some cases

HDFS-8825 Do not use small blocks for balancing the cluster

HDFS-8825 Allow Balancer to run faster

HDFS-8825 HDFS Balancer should consider remaining storage % when checking for under-utilized machines

HDFS-8825 Remove the limitation imposed by dfs.balancer.moverThreads

HDFS-8825 Incorrect Dispatcher#Source wait/notify leads to early termination

HDFS-8825 Separate Balancer specific logic form Dispatcher

HDFS-8825 Balancer documentation should not be in javadoc