com.bigdata.counters.osx

Class IOStatCollector

java.lang.Object

com.bigdata.counters.AbstractProcessCollector

com.bigdata.counters.osx.IOStatCollector

All Implemented Interfaces:

ICounterHierarchy, ICounterSetAccess, IHostCounters, IRequiredHostCounters, IStatisticsCollector

public class IOStatCollector
extends AbstractProcessCollector
implements ICounterHierarchy, IRequiredHostCounters, IHostCounters

Collects some counters using iostat under OSX. Unfortunately, iostat does not break down the reads and writes and does not report IO Wait. This information is obviously available from OSX as it is provided by the ActivityMonitor, but we can not get it from iostat.

Author:

Bryan Thompson

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	IOStatCollector.IOStatReader Sample output for iostat -d -C -n 999 -w 60, where 60 is the interval.

Field Summary

Fields inherited from class com.bigdata.counters.AbstractProcessCollector

activeProcess, log

Fields inherited from interface com.bigdata.counters.IHostCounters

CPU_PercentIOWait, CPU_PercentSystemTime, CPU_PercentUserTime, Info_NumProcessors, Info_ProcessorInfo, Memory_Bytes_Available, Memory_Bytes_Free, Memory_MinorFaultsPerSec, Memory_SwapBytesAvailable, Memory_SwapBytesUsed, PhysicalDisk_BytesPerSec, PhysicalDisk_ReadsPerSec, PhysicalDisk_TransfersPerSec, PhysicalDisk_WritesPerSec

Fields inherited from interface com.bigdata.counters.IRequiredHostCounters

CPU_PercentProcessorTime, Info_Architecture, Info_OperatingSystemName, Info_OperatingSystemVersion, LogicalDisk_PercentFreeSpace, Memory_majorFaultsPerSecond, PhysicalDisk_BytesReadPerSec, PhysicalDisk_BytesWrittenPerSec

Fields inherited from interface com.bigdata.counters.ICounterHierarchy

CPU, Info, LogicalDisk, Memory, Memory_GarbageCollectors, Memory_Memory_Pools, PhysicalDisk, ps

Constructor Summary

Constructors

Constructor and Description
IOStatCollector(int interval, boolean cpuStats)

Method Summary

Methods

Modifier and Type	Method and Description
List<String>	getCommand()
CounterSet	getCounters() Return performance counters.
AbstractProcessReader	getProcessReader()

Methods inherited from class com.bigdata.counters.AbstractProcessCollector

getInterval, setEnvironment, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

IOStatCollector

public IOStatCollector(int interval,
               boolean cpuStats)

Parameters:

interval - The interval for the collected statistics.

cpuStats - true if the collector should report on the CPU stats (us, sy, id).

Method Detail

getCommand

public List<String> getCommand()

Specified by:

getCommand in class AbstractProcessCollector

getCounters

public CounterSet getCounters()

Description copied from interface: ICounterSetAccess

Return performance counters.

Specified by:

getCounters in interface ICounterSetAccess

getProcessReader

public AbstractProcessReader getProcessReader()

Specified by:

getProcessReader in class AbstractProcessCollector