voldemort.utils
Class KeyDistributionGenerator

java.lang.Object
  voldemort.utils.KeyDistributionGenerator

public class KeyDistributionGenerator
extends java.lang.Object

Field Summary

static int

DEFAULT_NUM_KEYS

Constructor Summary

KeyDistributionGenerator()

Method Summary

static java.util.HashMap<java.lang.Integer,java.lang.Double>	generateDistribution(Cluster cluster, StoreDefinition storeDef, java.util.List<ByteArray> keys) Generates distribution for a specific store definition
static java.util.List<ByteArray>	generateKeys(int numKeys)
static java.util.HashMap<java.lang.Integer,java.lang.Double>	generateOverallDistribution(Cluster cluster, java.util.List<StoreDefinition> storeDefs, java.util.List<ByteArray> keys)
static java.util.HashMap<java.lang.Integer,java.lang.Double>	generateOverallDistributionWithUniqueStores(Cluster cluster, java.util.HashMap<StoreDefinition,java.lang.Integer> uniqueStoreDefsWithCount, java.util.List<ByteArray> keys)
static double	getStdDeviation(java.util.HashMap<java.lang.Integer,java.lang.Double> distribution)
static java.util.HashMap<StoreDefinition,java.lang.Integer>	getUniqueStoreDefinitionsWithCounts(java.util.List<StoreDefinition> storeDefs) Given a list of store definitions, find out and return a map of similar store definitions + count of them
static void	main(java.lang.String[] args)
static void	printDistribution(java.util.HashMap<java.lang.Integer,java.lang.Double> distribution)
static java.lang.String	printOverallDistribution(Cluster cluster, java.util.List<StoreDefinition> storeDefs, java.util.List<ByteArray> keys) Given the cluster metadata and list of store definitions, presents a string of the distribution
static java.lang.String	printStoreWiseDistribution(Cluster cluster, java.util.List<StoreDefinition> storeDefs, java.util.List<ByteArray> keys) Given the cluster metadata and list of store definitions, presents a string of the store wise distribution

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_NUM_KEYS

public static final int DEFAULT_NUM_KEYS

See Also:

Constant Field Values

Constructor Detail

KeyDistributionGenerator

public KeyDistributionGenerator()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException

printStoreWiseDistribution

public static java.lang.String printStoreWiseDistribution(Cluster cluster,
                                                          java.util.List<StoreDefinition> storeDefs,
                                                          java.util.List<ByteArray> keys)

Given the cluster metadata and list of store definitions, presents a string of the store wise distribution

Parameters:

cluster - The cluster metadata

storeDefs - List of store definitions

keys - List of byte keys

Returns:

String representation

printOverallDistribution

public static java.lang.String printOverallDistribution(Cluster cluster,
                                                        java.util.List<StoreDefinition> storeDefs,
                                                        java.util.List<ByteArray> keys)

Given the cluster metadata and list of store definitions, presents a string of the distribution

Parameters:

cluster - The cluster metadata

storeDefs - List of store definitions

keys - List of keys

Returns:

String representation

generateOverallDistribution

public static java.util.HashMap<java.lang.Integer,java.lang.Double> generateOverallDistribution(Cluster cluster,
                                                                                                java.util.List<StoreDefinition> storeDefs,
                                                                                                java.util.List<ByteArray> keys)

generateOverallDistributionWithUniqueStores

public static java.util.HashMap<java.lang.Integer,java.lang.Double> generateOverallDistributionWithUniqueStores(Cluster cluster,
                                                                                                                java.util.HashMap<StoreDefinition,java.lang.Integer> uniqueStoreDefsWithCount,
                                                                                                                java.util.List<ByteArray> keys)

generateDistribution

public static java.util.HashMap<java.lang.Integer,java.lang.Double> generateDistribution(Cluster cluster,
                                                                                         StoreDefinition storeDef,
                                                                                         java.util.List<ByteArray> keys)

Generates distribution for a specific store definition

Parameters:

cluster - The cluster metadata

storeDef - The store definition metadata

keys - The list of keys as bytes

Returns:

Map of node id to their corresponding %age distribution

getUniqueStoreDefinitionsWithCounts

public static java.util.HashMap<StoreDefinition,java.lang.Integer> getUniqueStoreDefinitionsWithCounts(java.util.List<StoreDefinition> storeDefs)

Given a list of store definitions, find out and return a map of similar store definitions + count of them

Parameters:

storeDefs - All store definitions

Returns:

Map of a unique store definition + counts

generateKeys

public static java.util.List<ByteArray> generateKeys(int numKeys)

printDistribution

public static void printDistribution(java.util.HashMap<java.lang.Integer,java.lang.Double> distribution)

getStdDeviation

public static double getStdDeviation(java.util.HashMap<java.lang.Integer,java.lang.Double> distribution)