Package edu.jas.gb

Class GroebnerBaseDistributedEC<C extends RingElem<C>>

java.lang.Object

edu.jas.gb.GroebnerBaseAbstract<C>

edu.jas.gb.GroebnerBaseDistributedEC<C>

Type Parameters:

C - coefficient type

All Implemented Interfaces:

GroebnerBase<C>, java.io.Serializable

public class GroebnerBaseDistributedEC<C extends RingElem<C>>
extends GroebnerBaseAbstract<C>

Groebner Base distributed algorithm. Implements a distributed memory parallel version of Groebner bases with executable channels. Using pairlist class, distributed tasks do reduction, one communication channel per task.

Author:

Heinz Kredel

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static int	DEFAULT_PORT	Default server port.
protected static int	DEFAULT_THREADS	Default number of threads.
protected int	DHT_PORT	Default distributed hash table server port.
protected java.lang.String	mfile	machine file to use.
protected java.util.concurrent.ExecutorService	pool	Pool of threads to use.
protected int	port	Server port to use.
protected int	threads	Number of threads to use.

Fields inherited from class edu.jas.gb.GroebnerBaseAbstract

blas, red, strategy

Constructor Summary

Constructors

Constructor	Description
GroebnerBaseDistributedEC(java.lang.String mfile)	Constructor.
GroebnerBaseDistributedEC(java.lang.String mfile, int threads)	Constructor.
GroebnerBaseDistributedEC(java.lang.String mfile, int threads, int port)	Constructor.
GroebnerBaseDistributedEC(java.lang.String mfile, int threads, PairList<C> pl, int port)	Constructor.
GroebnerBaseDistributedEC(java.lang.String mfile, int threads, java.util.concurrent.ExecutorService pool, int port)	Constructor.
GroebnerBaseDistributedEC(java.lang.String mfile, int threads, java.util.concurrent.ExecutorService pool, PairList<C> pl, int port)	Constructor.

Method Summary

Modifier and Type	Method	Description
static <C extends RingElem<C>> void	clientPart(java.lang.String host, int port, int dhtport)	GB distributed client part.
java.util.List<GenPolynomial<C>>	GB(int modv, java.util.List<GenPolynomial<C>> F)	Distributed Groebner base.
java.util.List<GenPolynomial<C>>	minimalGB(java.util.List<GenPolynomial<C>> Fp)	Minimal ordered groebner basis.
void	terminate()	Cleanup and terminate ExecutorService.
void	terminate(boolean shutDown)	Terminates the distributed thread pools.

Methods inherited from class edu.jas.gb.GroebnerBaseAbstract

cancel, commonZeroTest, constructUnivariate, extGB, extGB, GB, GB, GB, isGB, isGB, isGB, isGB, isGB, isGB, isGBidem, isGBsimple, isMinimalGB, isReductionMatrix, isReductionMatrix, minimalExtendedGB, normalizeMatrix, normalizeZerosOnes, toString, univariateDegrees

Methods inherited from class java.lang.Object

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

Field Detail

threads

protected final int threads

Number of threads to use.

DEFAULT_THREADS

protected static final int DEFAULT_THREADS

Default number of threads.

See Also:

Constant Field Values

pool

protected final transient java.util.concurrent.ExecutorService pool

Pool of threads to use. Note: No ComputerThreads for one node tests

DEFAULT_PORT

protected static final int DEFAULT_PORT

Default server port.

See Also:

Constant Field Values

DHT_PORT

protected final int DHT_PORT

Default distributed hash table server port.

port

protected final int port

Server port to use.

mfile

protected final java.lang.String mfile

machine file to use.

Constructor Detail

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile)

Constructor.

Parameters:

mfile - name of the machine file.

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile,
                                 int threads)

Constructor.

Parameters:

mfile - name of the machine file.

threads - number of threads to use.

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile,
                                 int threads,
                                 int port)

Constructor.

Parameters:

mfile - name of the machine file.

threads - number of threads to use.

port - server port to use.

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile,
                                 int threads,
                                 java.util.concurrent.ExecutorService pool,
                                 int port)

Constructor.

Parameters:

mfile - name of the machine file.

threads - number of threads to use.

pool - ExecutorService to use.

port - server port to use.

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile,
                                 int threads,
                                 PairList<C> pl,
                                 int port)

Constructor.

Parameters:

mfile - name of the machine file.

threads - number of threads to use.

pl - pair selection strategy

port - server port to use.

GroebnerBaseDistributedEC

public GroebnerBaseDistributedEC(java.lang.String mfile,
                                 int threads,
                                 java.util.concurrent.ExecutorService pool,
                                 PairList<C> pl,
                                 int port)

Constructor.

Parameters:

mfile - name of the machine file.

threads - number of threads to use.

pool - ExecutorService to use.

pl - pair selection strategy

port - server port to use.

Method Detail

terminate

public void terminate()

Cleanup and terminate ExecutorService.

Overrides:

terminate in class GroebnerBaseAbstract<C extends RingElem<C>>

terminate

public void terminate(boolean shutDown)

Terminates the distributed thread pools.

Parameters:

shutDown - true, if shut-down of the remote executable servers is requested, false, if remote executable servers stay alive.

GB

public java.util.List<GenPolynomial<C>> GB(int modv,
                                           java.util.List<GenPolynomial<C>> F)

Distributed Groebner base.

Parameters:

modv - number of module variables.

F - polynomial list.

Returns:

GB(F) a Groebner base of F or null, if a IOException occurs.

clientPart

public static <C extends RingElem<C>> void clientPart(java.lang.String host,
                                                      int port,
                                                      int dhtport)
                                               throws java.io.IOException

GB distributed client part.

Parameters:

host - the server runs on.

port - the server runs.

dhtport - of the DHT server.

Throws:

java.io.IOException

minimalGB

public java.util.List<GenPolynomial<C>> minimalGB(java.util.List<GenPolynomial<C>> Fp)

Minimal ordered groebner basis.

Specified by:

minimalGB in interface GroebnerBase<C extends RingElem<C>>

Overrides:

minimalGB in class GroebnerBaseAbstract<C extends RingElem<C>>

Parameters:

Fp - a Groebner base.

Returns:

a reduced Groebner base of Fp.