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

Chore that will call HMaster.balanceHMaster.balance() when needed.

An efficient array based implementation similar to ClusterState for keeping the status of the cluster in terms of region assignment and distribution.

Class used to hold the current state of the cluster and how balanced it is.

Helper class for FavoredNodeLoadBalancer that has all the intelligence for racks, meta scans, etc.

This class contains the mapping information between each region and its favored region server list.

Faced for exposing metrics about the balancer.

The following comparator assumes that RegionId from HRegionInfo can represent the age of the region - larger RegionId means the region is younger.

Data structure that holds servername and 'load'.

Stores additional per-server information about the regions added/removed during the run of the balancing algorithm.

Generates a candidate action to be applied to the cluster for cost function search

Base class of StochasticLoadBalancer's Cost Functions.

Compute the cost of total memstore size.

Compute the cost of a potential cluster state from skew in number of primary regions on a cluster.

Compute the cost of total number of read requests The more unbalanced the higher the computed cost will be.

Generates candidates which moves the replicas out of the region server for co-hosted region replicas

Generates candidates which moves the replicas out of the rack for co-hosted region replicas in the same rack

Compute the cost of total open storefiles size.

Compute the cost of total number of write requests.