org.opendaylight.sfc.provider.api

Class SfcServiceFunctionLoadPathAwareSchedulerAPI

java.lang.Object

org.opendaylight.sfc.provider.api.SfcServiceFunctionSchedulerAPI

org.opendaylight.sfc.provider.api.SfcServiceFunctionLoadPathAwareSchedulerAPI

public final class SfcServiceFunctionLoadPathAwareSchedulerAPI
extends SfcServiceFunctionSchedulerAPI

This class implements LoadPath aware scheduling mode.

Since:

2016-09-10

Author:

Dongeun Suh (dongensuh@gmail.com), Jaewook Lee (iioiioiio123@korea.ac.kr), Hosung Beak (ghlemd@korea.ac.kr), Sangheon Pack (shpack@korea.ac.kr)

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SfcServiceFunctionLoadPathAwareSchedulerAPI()

Method Summary

Modifier and Type	Method and Description
List<SfName>	scheduleServiceFunctions(ServiceFunctionChain chain, int serviceIndex, ServiceFunctionPath sfp) This method finds out the load and path-aware Service Function Path for the given Service Function Chain.

Methods inherited from class org.opendaylight.sfc.provider.api.SfcServiceFunctionSchedulerAPI

getSfcServiceFunctionSchedulerType, getSFPHopSfMapping, setSfcServiceFunctionSchedulerType

Methods inherited from class java.lang.Object

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

Constructor Detail

SfcServiceFunctionLoadPathAwareSchedulerAPI

protected SfcServiceFunctionLoadPathAwareSchedulerAPI()

Method Detail

scheduleServiceFunctions

public List<SfName> scheduleServiceFunctions(ServiceFunctionChain chain,
                                             int serviceIndex,
                                             ServiceFunctionPath sfp)

This method finds out the load and path-aware Service Function Path for the given Service Function Chain. For each SF type in the given chain, this method calls the getServiceFunctionByType method to find an SF instance to be included in the SFP. For the first SF type in the chain, the getServiceFunctionByType method returns a name of the SF instance who has the lowest CPU utilization. From the second SF type in the chain, the getServiceFunctionByType method returns a name of the instance with the lowest CPU utilization among the instances whose hop counts to the previously selected SF instance are less than or equal to Path_threshold (default value is 3).

Specified by:

scheduleServiceFunctions in class SfcServiceFunctionSchedulerAPI

Parameters:

chain - Service Function Chain to render

serviceIndex - Not used currently

Returns:

List<String> Service Function name list in the shortest path