io.scalecube.cluster

Class ClusterMath

java.lang.Object

io.scalecube.cluster.ClusterMath

public final class ClusterMath
extends Object

Utility class which contains math computation on cluster properties.

Author:

Anton Kharenko

Method Summary

Modifier and Type	Method and Description
static int	ceilLog2(int num) Returns ceil(log2(n + 1)).
static double	gossipConvergencePercent(int fanout, int repeatMult, int clusterSize, double lossPercent)
static double	gossipConvergenceProbability(int fanout, int repeatMult, int clusterSize, double loss)
static long	gossipDisseminationTime(int repeatMult, int clusterSize, long gossipInterval)
static int	gossipPeriodsToSpread(int repeatMult, int clusterSize)
static int	gossipPeriodsToSweep(int repeatMult, int clusterSize)
static long	gossipTimeoutToSweep(int repeatMult, int clusterSize, long gossipInterval)
static int	maxMessagesPerGossipPerNode(int fanout, int repeatMult, int clusterSize)
static int	maxMessagesPerGossipTotal(int fanout, int repeatMult, int clusterSize)
static long	suspicionTimeout(int suspicionMult, int clusterSize, long pingInterval)

Methods inherited from class java.lang.Object

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

Method Detail

gossipConvergencePercent

public static double gossipConvergencePercent(int fanout,
                                              int repeatMult,
                                              int clusterSize,
                                              double lossPercent)

gossipConvergenceProbability

public static double gossipConvergenceProbability(int fanout,
                                                  int repeatMult,
                                                  int clusterSize,
                                                  double loss)

maxMessagesPerGossipTotal

public static int maxMessagesPerGossipTotal(int fanout,
                                            int repeatMult,
                                            int clusterSize)

maxMessagesPerGossipPerNode

public static int maxMessagesPerGossipPerNode(int fanout,
                                              int repeatMult,
                                              int clusterSize)

gossipDisseminationTime

public static long gossipDisseminationTime(int repeatMult,
                                           int clusterSize,
                                           long gossipInterval)

gossipTimeoutToSweep

public static long gossipTimeoutToSweep(int repeatMult,
                                        int clusterSize,
                                        long gossipInterval)

gossipPeriodsToSweep

public static int gossipPeriodsToSweep(int repeatMult,
                                       int clusterSize)

gossipPeriodsToSpread

public static int gossipPeriodsToSpread(int repeatMult,
                                        int clusterSize)

suspicionTimeout

public static long suspicionTimeout(int suspicionMult,
                                    int clusterSize,
                                    long pingInterval)

ceilLog2

public static int ceilLog2(int num)

Returns ceil(log2(n + 1)).