Package org.apache.hadoop.hbase.master.balancer

Interface Summary

Interface	Description
MetricsBalancerSource

Class Summary

Class	Description
BalancerChore	Chore that will call HMaster.balanceHMaster.balance() when needed.
BaseLoadBalancer	The base class for load balancers.
BaseLoadBalancer.Cluster	An efficient array based implementation similar to ClusterState for keeping the status of the cluster in terms of region assignment and distribution.
ClusterLoadState	Class used to hold the current state of the cluster and how balanced it is.
ClusterStatusChore	Chore that will feed the balancer the cluster status.
FavoredNodeAssignmentHelper	Helper class for FavoredNodeLoadBalancer that has all the intelligence for racks, meta scans, etc.
FavoredNodeLoadBalancer	An implementation of the LoadBalancer that assigns favored nodes for each region.
FavoredNodesPlan	This class contains the mapping information between each region and its favored region server list.
LoadBalancerFactory	The class that creates a load balancer from a conf.
MetricsBalancer	Faced for exposing metrics about the balancer.
MetricsBalancerSourceImpl
SimpleLoadBalancer	Makes decisions about the placement and movement of Regions across RegionServers.
StochasticLoadBalancer	This is a best effort load balancer.
StochasticLoadBalancer.CostFromRegionLoadFunction	Base class the allows writing costs functions from rolling average of some number from RegionLoad.
StochasticLoadBalancer.CostFunction	Base class of StochasticLoadBalancer's Cost Functions.
StochasticLoadBalancer.LoadPicker
StochasticLoadBalancer.LocalityCostFunction	Compute a cost of a potential cluster configuration based upon where StoreFiles are located.
StochasticLoadBalancer.MemstoreSizeCostFunction	Compute the cost of total memstore size.
StochasticLoadBalancer.MoveCostFunction	Given the starting state of the regions and a potential ending state compute cost based upon the number of regions that have moved.
StochasticLoadBalancer.ReadRequestCostFunction	Compute the cost of total number of read requests The more unbalanced the higher the computed cost will be.
StochasticLoadBalancer.RegionCountSkewCostFunction	Compute the cost of a potential cluster state from skew in number of regions on a cluster.
StochasticLoadBalancer.StoreFileCostFunction	Compute the cost of total open storefiles size.
StochasticLoadBalancer.TableSkewCostFunction	Compute the cost of a potential cluster configuration based upon how evenly distributed tables are.
StochasticLoadBalancer.WriteRequestCostFunction	Compute the cost of total number of write requests.

Enum Summary

Enum	Description
FavoredNodesPlan.Position