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
org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerCluster	DiskBalancerCluster represents the nodes that we are working against.
org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerDataNode	DiskBalancerDataNode represents a DataNode that exists in the cluster.
org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerVolume	DiskBalancerVolume represents a volume in the DataNode.
org.apache.hadoop.hdfs.server.diskbalancer.datamodel.DiskBalancerVolumeSet	DiskBalancerVolumeSet is a collection of storage devices on the data node which are of similar StorageType.