Package org.apache.pulsar.broker.loadbalance.impl

Class LeastResourceUsageWithWeight

java.lang.Object

org.apache.pulsar.broker.loadbalance.impl.LeastResourceUsageWithWeight

All Implemented Interfaces:

ModularLoadManagerStrategy

public class LeastResourceUsageWithWeight
extends Object
implements ModularLoadManagerStrategy

Placement strategy which selects a broker based on which one has the least resource usage with weight. This strategy takes into account the historical load percentage and short-term load percentage, and thus will not cause cluster fluctuations due to short-term load jitter.

Constructor Summary

Constructors

Constructor	Description
LeastResourceUsageWithWeight()

Method Summary

Modifier and Type	Method	Description
Optional<String>	selectBroker(Set<String> candidates, org.apache.pulsar.policies.data.loadbalancer.BundleData bundleToAssign, LoadData loadData, org.apache.pulsar.broker.ServiceConfiguration conf)	Find a suitable broker to assign the given bundle to.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LeastResourceUsageWithWeight

public LeastResourceUsageWithWeight()

Method Details

selectBroker

public Optional<String> selectBroker(Set<String> candidates,
 org.apache.pulsar.policies.data.loadbalancer.BundleData bundleToAssign,
 LoadData loadData,
 org.apache.pulsar.broker.ServiceConfiguration conf)

Find a suitable broker to assign the given bundle to. This method is not thread safety.

Specified by:

selectBroker in interface ModularLoadManagerStrategy

Parameters:

candidates - The candidates for which the bundle may be assigned.

bundleToAssign - The data for the bundle to assign.

loadData - The load data from the leader broker.

conf - The service configuration.

Returns:

The name of the selected broker as it appears on ZooKeeper.