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

package org.apache.hadoop.hdfs.server.diskbalancer.datamodel

Disk Balancer Data Model is the Data Model for the cluster that Disk Balancer is working against. This information is read directly from NameNode or from a user supplied json model file. Here is the overview of the model maintained by diskBalancer. DiskBalancerCluster is a list of DiskBalancerDataNodes. DiskBalancerDataNodes is a collection of DiskBalancerVolumeSets DiskBalancerVolumeSets is a collection of DiskBalancerVolumes DiskBalancerVolumes represents actual volumes on DataNodes.

Related Packages

Package	Description
org.apache.hadoop.hdfs.server.diskbalancer	Disk Balancer connects to a .DataNode and attempts to spread data across all volumes evenly.
org.apache.hadoop.hdfs.server.diskbalancer.command	Commands for disk balancer command line tool.
org.apache.hadoop.hdfs.server.diskbalancer.connectors	Connectors package is a set of logical connectors that connect to various data sources to read the hadoop cluster information.
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.

Classes

Class	Description
DiskBalancerCluster	DiskBalancerCluster represents the nodes that we are working against.
DiskBalancerDataNode	DiskBalancerDataNode represents a DataNode that exists in the cluster.
DiskBalancerVolume	DiskBalancerVolume represents a volume in the DataNode.
DiskBalancerVolumeSet	DiskBalancerVolumeSet is a collection of storage devices on the data node which are of similar StorageType.