hydra

Class PartitionPrms

java.lang.Object

hydra.BasePrms

hydra.PartitionPrms

public class PartitionPrms
extends BasePrms

A class used to store keys for region configuration settings related to partitioning. The settings are used to create instances of PartitionDescription, and can be referenced from a region configuration via RegionPrms.partitionName if the configuration explicitly sets the RegionPrms.dataPolicy to partition the region.

The number of description instances is gated by names. For other parameters, if fewer values than names are given, the remaining instances will use the last value in the list. See $JTESTS/hydra/hydra.txt for more details.

Unused parameters default to null, except where noted. This uses the product default, except where noted.

Values, fields, and subfields can be set to BasePrms.NONE where noted, with the documented effect.

Values, fields, and subfields of a parameter can be set to BasePrms.DEFAULT, except where noted. This uses the product default, except where noted.

Values, fields, and subfields of a parameter can use oneof, range, or robing except where noted, but each description created will use a fixed value chosen at test configuration time. Use as a task attribute is illegal.

Field Summary

Fields

Modifier and Type	Field and Description
static Long	colocatedWith (String(s)) Region name to be colocated with for each partition.
static Long	fixedPartitionName (String(s)) Name of logical fixed partition configuration for each region, as found in FixedPartitionPrms.names.
static Long	localMaxMemory (int(s)) Local max memory for each partition, in megabytes.
static Long	names (String(s)) Logical names of the partition descriptions.
static Long	partitionListeners (Comma-separated String(s)) Class names of partition listeners for each partition description.
static Long	partitionResolver (String(s)) Class name of partition resolver for each partition.
static Long	recoveryDelay (long(s)) Delay in milliseconds that existing members will wait before satisfying redundancy after another member crashes.
static Long	redundantCopies (int(s)) Redundant copies for each partition.
static Long	startupRecoveryDelay (long(s)) Delay in milliseconds that a new member will wait before trying to satisfy redundancy of data hosted on other members.
static Long	totalMaxMemory (long(s)) Total max memory for each partition, in megabytes.
static Long	totalNumBuckets (int(s)) Total num buckets for each partition.

Fields inherited from class hydra.BasePrms

DASH, DEFAULT, NONE

Constructor Summary

Constructors

Constructor and Description
PartitionPrms()

Method Summary

Modifier and Type	Method and Description
static void	main(String[] args)

Methods inherited from class hydra.BasePrms

dumpKeys, keyForName, nameForKey, setValues, tab, tasktab

Methods inherited from class java.lang.Object

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

Field Detail

names

public static Long names

(String(s)) Logical names of the partition descriptions. Each name must be unique. Defaults to null. Not for use with oneof, range, or robing.

colocatedWith

public static Long colocatedWith

(String(s)) Region name to be colocated with for each partition. Can be specified as BasePrms.NONE (default). Note that the product requires partitionResolver to also be set.

fixedPartitionName

public static Long fixedPartitionName

(String(s)) Name of logical fixed partition configuration for each region, as found in FixedPartitionPrms.names. Can be specified as BasePrms.NONE (default).

localMaxMemory

public static Long localMaxMemory

(int(s)) Local max memory for each partition, in megabytes.

The product default is computed at runtime.

partitionListeners

public static Long partitionListeners

(Comma-separated String(s)) Class names of partition listeners for each partition description. Can be specified as BasePrms.NONE (default). Example: To use ClassA and ClassB for the first region, no listeners for the second region, and ClassC for the third region, specify: ClassA ClassB, none, ClassC

Note that a new instance of each class is created each time a given partition description is used to create a region.

partitionResolver

public static Long partitionResolver

(String(s)) Class name of partition resolver for each partition. Can be specified as BasePrms.NONE (default). See also colocatedWith.

Hydra creates a singleton instance for each partition description.

recoveryDelay

public static Long recoveryDelay

(long(s)) Delay in milliseconds that existing members will wait before satisfying redundancy after another member crashes.

redundantCopies

public static Long redundantCopies

(int(s)) Redundant copies for each partition.

startupRecoveryDelay

public static Long startupRecoveryDelay

(long(s)) Delay in milliseconds that a new member will wait before trying to satisfy redundancy of data hosted on other members.

totalNumBuckets

public static Long totalNumBuckets

(int(s)) Total num buckets for each partition.

totalMaxMemory

public static Long totalMaxMemory

(long(s)) Total max memory for each partition, in megabytes.

Constructor Detail

PartitionPrms

public PartitionPrms()

Method Detail

main

public static void main(String[] args)