ostore.archive.cauchy
Class Parameters

java.lang.Object
  |
  +--ostore.archive.cauchy.Parameters

public class Parameters

extends Object

Parameters are the parameters used to encode/decode an object.

Version:

$Id: Parameters.java,v 1.4 2003/11/17 23:52:43 emilong Exp $

Author:

Hakim Weatherspoon

Field Summary

protected int	_Elen Elen is the length of the encoding in words.
protected int	_Lfield Lfield is the log of the length of the field.
protected int	_Mfragments Mfragments is the number of message fragments IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}.
protected int	_Mlen Mlen is the length of the message in words.
protected int	_Mseglen Mseglen is the message segment length.
protected int	_Nfragments Nfragments is the total number of fragments sent.
protected int	_Niter Niter is the number of messages sent.
protected int	_Nsegs Nsegs is the number of segments in a fragment.
protected int	_Plen Plen is the fragment length in words excluding the overhead for storing the index.
protected int	_Plentot Plentot is the fragment length in words including the overhead for storing the index.
protected int	_Rfragments Rfragments is the number of redundant fragments IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}.
protected int	_SMultField SMultField is the size of the multiplicative field (2^{Lfield}-1) == TableLength - 1.
protected int	_TableLength TableLength is 2^{Lfield}

Constructor Summary

Parameters()
Empty CONSTRUCTOR Initializes Parameters such that Mfragments and Rfragments are zero.

Method Summary

int	Elen() Elen is the length of the encoding in words.
int	Lfield() Lfield is the log of the length of the field.
int	Mfragments() Mfragments is the number of message fragments
int	Mlen() Mlen is the length of the message in words.
int	Mseglen() Mseglen is the message segment length.
int	Nfragments() Nfragments is the total number of fragments sent.
int	Niter() Niter is the number of messages sent.
int	Nsegs() Nsegs is the number of segments in a fragment.
int	Plen() Plen is the fragment length in words excluding the overhead for storing the index.
int	Plentot() Plentot is the fragment length in words including the overhead for storing the index.
void	resetParam()
int	Rfragments() Rfragments is the number of redundant fragments
boolean	setLfield(int n) Lfield (length of field) must be (1 <= Lfield <= 16) otherwise function returns false and Lfield stays default.
boolean	setNsegs(int n) Nsegs is the number of segments in each fragment in which to perform the Galois Field operations.
int	SMultField() SMultField is the size of the multiplicative field (2^{Lfield}-1) == TableLength - 1.
int	TableLength() TableLength is 2^{Lfield}

Methods inherited from class java.lang.Object

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

Field Detail

_Niter

protected int _Niter

Niter is the number of messages sent.

_Lfield

protected int _Lfield

Lfield is the log of the length of the field.

_Nsegs

protected int _Nsegs

Nsegs is the number of segments in a fragment. Length of fragment in bytes is 4*Nsegs*Lfield.

_TableLength

protected int _TableLength

TableLength is 2^{Lfield}

_SMultField

protected int _SMultField

SMultField is the size of the multiplicative field (2^{Lfield}-1) == TableLength - 1.

_Plen

protected int _Plen

Plen is the fragment length in words excluding the overhead for storing the index.

_Plentot

protected int _Plentot

Plentot is the fragment length in words including the overhead for storing the index.

_Mfragments

protected int _Mfragments

Mfragments is the number of message fragments IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}. Lfield must be set large enough to make this true else the encoding and decoding won't work

_Rfragments

protected int _Rfragments

Rfragments is the number of redundant fragments IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}. Lfield must be set large enough to make this true else the encoding and decoding won't work.

_Nfragments

protected int _Nfragments

Nfragments is the total number of fragments sent.

_Mseglen

protected int _Mseglen

Mseglen is the message segment length.

_Mlen

protected int _Mlen

Mlen is the length of the message in words.

_Elen

protected int _Elen

Elen is the length of the encoding in words.

Constructor Detail

Parameters

public Parameters()

Empty CONSTRUCTOR Initializes Parameters such that Mfragments and Rfragments are zero.

Method Detail

Niter

public int Niter()

Niter is the number of messages sent.

Lfield

public int Lfield()

Lfield is the log of the length of the field.

Nsegs

public int Nsegs()

Nsegs is the number of segments in a fragment. Length of fragment in bytes is 4*Nsegs*Lfield.

TableLength

public int TableLength()

TableLength is 2^{Lfield}

SMultField

public int SMultField()

SMultField is the size of the multiplicative field (2^{Lfield}-1) == TableLength - 1.

Plen

public int Plen()

Plen is the fragment length in words excluding the overhead for storing the index.

Plentot

public int Plentot()

Plentot is the fragment length in words including the overhead for storing the index.

Mfragments

public int Mfragments()

Mfragments is the number of message fragments

Returns:

return == return the number of message fragments. IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}. Lfield must be set large enough to make this true else the encoding and decoding won't work

Rfragments

public int Rfragments()

Rfragments is the number of redundant fragments

Returns:

return == return the number of message fragments. IMPORTANT: The max of Mfragments and Rfragments is at most 2^{Lfield-1}. Lfield must be set large enough to make this true else the encoding and decoding won't work.

Nfragments

public int Nfragments()

Nfragments is the total number of fragments sent.

Mseglen

public int Mseglen()

Mseglen is the message segment length.

Mlen

public int Mlen()

Mlen is the length of the message in words.

Elen

public int Elen()

Elen is the length of the encoding in words.

setNsegs

public boolean setNsegs(int n)

Nsegs is the number of segments in each fragment in which to perform the Galois Field operations.

Parameters:

n - == number to set Nsegs to, n > 0.

Returns:

return==false if n <= 0, otherwise returns true.

setLfield

public boolean setLfield(int n)

Lfield (length of field) must be (1 <= Lfield <= 16) otherwise function returns false and Lfield stays default.

Parameters:

n - == number to set Lfield to, 1 <= Lfield <= 16.

Returns:

return==Lfield must be (1 <= Lfield <= 16) otherwise function returns false and Lfield stays default

resetParam

public void resetParam()