Package org.apache.hadoop.hdfs.server.diskbalancer.planner

package org.apache.hadoop.hdfs.server.diskbalancer.planner
Planner takes a DiskBalancerVolumeSet, threshold and computes a series of steps that lead to an even data distribution between volumes of this DiskBalancerVolumeSet. The main classes of this package are steps and planner. Here is a high level view of how planner operates: DiskBalancerVolumeSet current = volumeSet; while(current.isBalancingNeeded(thresholdValue)) { // Creates a plan , like move 20 GB data from v1 -> v2 Step step = planner.plan(current, thresholdValue); // we add that to our plan planner.addStep(current, step); // Apply the step to current state of the diskSet to //compute the next state current = planner.apply(current, step); } //when we are done , return the list of steps return planner;