org.apache.hadoop.mapred.gridmix.emulators.resourceusage
Interface ResourceUsageEmulatorPlugin

All Known Implementing Classes:

CumulativeCpuUsageEmulatorPlugin, TotalHeapUsageEmulatorPlugin

public interface ResourceUsageEmulatorPlugin

Each resource to be emulated should have a corresponding implementation class that implements ResourceUsageEmulatorPlugin.

ResourceUsageEmulatorPlugin will be configured using the initialize(Configuration, ResourceUsageMetrics, ResourceCalculatorPlugin, Progressive) call. Every ResourceUsageEmulatorPlugin is also configured with a feedback module i.e a ResourceCalculatorPlugin, to monitor the current resource usage. ResourceUsageMetrics decides the final resource usage value to emulate. Progressive keeps track of the task's progress.

For configuring GridMix to load and and use a resource usage emulator, see ResourceUsageMatcher.

Method Summary

void	emulate() Emulate the resource usage to match the usage target.
void	initialize(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.tools.rumen.ResourceUsageMetrics metrics, org.apache.hadoop.mapreduce.util.ResourceCalculatorPlugin monitor, Progressive progress) Initialize the plugin.

Method Detail

initialize

void initialize(org.apache.hadoop.conf.Configuration conf,
                org.apache.hadoop.tools.rumen.ResourceUsageMetrics metrics,
                org.apache.hadoop.mapreduce.util.ResourceCalculatorPlugin monitor,
                Progressive progress)

Initialize the plugin. This might involve - initializing the variables - calibrating the plugin

emulate

void emulate()
             throws IOException,
                    InterruptedException

Emulate the resource usage to match the usage target. The plugin can use the given ResourceCalculatorPlugin to query for the current resource usage.

Throws:

IOException

InterruptedException