Package org.apache.hadoop.hdfs.server.diskbalancer.planner

Interface Step

All Known Implementing Classes:

MoveStep

public interface Step

A step in the plan.

Method Summary

Modifier and Type	Method	Description
long	getBandwidth()	Returns max disk bandwidth that disk balancer will use.
long	getBytesToMove()	Return the number of bytes to move.
DiskBalancerVolume	getDestinationVolume()	Gets the destination volume.
double	getIdealStorage()	Gets the IdealStorage.
long	getMaxDiskErrors()	Returns maximum number of disk erros tolerated.
java.lang.String	getSizeString(long size)	Returns a String representation of the Step Size.
DiskBalancerVolume	getSourceVolume()	Gets Source Volume.
long	getTolerancePercent()	Returns tolerance percentage, the good enough value when we move data from one to disk to another.
java.lang.String	getVolumeSetID()	Gets a volume Set ID.
void	setBandwidth(long bandwidth)	Set Bandwidth on a specific step.
void	setMaxDiskErrors(long maxDiskErrors)	Set maximum errors to tolerate before disk balancer step fails.
void	setTolerancePercent(long tolerancePercent)	Sets Tolerance percent on a specific step.

Method Detail

getBytesToMove

long getBytesToMove()

Return the number of bytes to move.

Returns:

bytes

getDestinationVolume

DiskBalancerVolume getDestinationVolume()

Gets the destination volume.

Returns:

- volume

getIdealStorage

double getIdealStorage()

Gets the IdealStorage.

Returns:

idealStorage

getSourceVolume

DiskBalancerVolume getSourceVolume()

Gets Source Volume.

Returns:

-- Source Volume

getVolumeSetID

java.lang.String getVolumeSetID()

Gets a volume Set ID.

Returns:

String

getSizeString

java.lang.String getSizeString(long size)

Returns a String representation of the Step Size.

Returns:

String

getMaxDiskErrors

long getMaxDiskErrors()

Returns maximum number of disk erros tolerated.

Returns:

long.

getTolerancePercent

long getTolerancePercent()

Returns tolerance percentage, the good enough value when we move data from one to disk to another.

Returns:

long.

getBandwidth

long getBandwidth()

Returns max disk bandwidth that disk balancer will use. Expressed in MB/sec. For example, a value like 10 indicates that disk balancer will only move 10 MB / sec while it is running.

Returns:

long.

setTolerancePercent

void setTolerancePercent(long tolerancePercent)

Sets Tolerance percent on a specific step.

Parameters:

tolerancePercent - - tolerance in percentage.

setBandwidth

void setBandwidth(long bandwidth)

Set Bandwidth on a specific step.

Parameters:

bandwidth - - in MB/s

setMaxDiskErrors

void setMaxDiskErrors(long maxDiskErrors)

Set maximum errors to tolerate before disk balancer step fails.

Parameters:

maxDiskErrors - - error count.