Package org.apache.hadoop.io.erasurecode

Class ErasureCoderOptions

java.lang.Object

org.apache.hadoop.io.erasurecode.ErasureCoderOptions

@Private
public final class ErasureCoderOptions
extends java.lang.Object

Erasure coder configuration that maintains schema info and coder options.

Constructor Summary

Constructors

Constructor	Description
ErasureCoderOptions(int numDataUnits, int numParityUnits)
ErasureCoderOptions(int numDataUnits, int numParityUnits, boolean allowChangeInputs, boolean allowVerboseDump)

Method Summary

Modifier and Type	Method	Description
boolean	allowChangeInputs()	Allow changing input buffer content (not positions).
boolean	allowVerboseDump()	Allow dump verbose debug info or not.
int	getNumAllUnits()	The number of all the involved units in the coding.
int	getNumDataUnits()	The number of data input units for the coding.
int	getNumParityUnits()	The number of parity output units for the coding.

Methods inherited from class java.lang.Object

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

Constructor Detail

ErasureCoderOptions

public ErasureCoderOptions(int numDataUnits,
                           int numParityUnits)

ErasureCoderOptions

public ErasureCoderOptions(int numDataUnits,
                           int numParityUnits,
                           boolean allowChangeInputs,
                           boolean allowVerboseDump)

Method Detail

getNumDataUnits

public int getNumDataUnits()

The number of data input units for the coding. A unit can be a byte, chunk or buffer or even a block.

Returns:

count of data input units

getNumParityUnits

public int getNumParityUnits()

The number of parity output units for the coding. A unit can be a byte, chunk, buffer or even a block.

Returns:

count of parity output units

getNumAllUnits

public int getNumAllUnits()

The number of all the involved units in the coding.

Returns:

count of all the data units and parity units

allowChangeInputs

public boolean allowChangeInputs()

Allow changing input buffer content (not positions). Maybe better performance if not allowed.

Returns:

true if allowing input content to be changed, false otherwise

allowVerboseDump

public boolean allowVerboseDump()

Allow dump verbose debug info or not.

Returns:

true if verbose debug info is desired, false otherwise