org.planx.xmlstore.koala.storage
Class StorageConfiguration

java.lang.Object
  org.planx.xmlstore.koala.storage.StorageConfiguration

public class StorageConfiguration
extends Object

Configuration parameters for the storage system. Change the value of fields to adapt the default parameters.

Field Summary

boolean	doDebug
boolean	isSharerEnabled Default is true.
PolicyFactory	policyFactory Default is PolicyFactory.
long	segmentSize The preferred size of segments.
long	sharerPeriod The number of milli seconds between sharer invocations.
boolean	useSoftNodeCache Whether to use weak or soft references in the node cache (nodes loaded into memory).
boolean	useSoftSegmentCache Whether to use weak or soft references in the segment cache (segments cached in memory).
float	utilization A factor between 0 and 1 indicating how much of a segment must always contain live data.

Constructor Summary

StorageConfiguration()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

policyFactory

public PolicyFactory policyFactory

Default is PolicyFactory.

isSharerEnabled

public boolean isSharerEnabled

Default is true.

sharerPeriod

public long sharerPeriod

The number of milli seconds between sharer invocations.

Default is 10000 ms.

utilization

public float utilization

A factor between 0 and 1 indicating how much of a segment must always contain live data. If less than this factor is utilized the sharer will copy the live data to a new segment (achieving 100% utilization).

segmentSize

public long segmentSize

The preferred size of segments. The actual size of a segment may vary.

useSoftNodeCache

public boolean useSoftNodeCache

Whether to use weak or soft references in the node cache (nodes loaded into memory). If true soft references will be used.

Default is false.

useSoftSegmentCache

public boolean useSoftSegmentCache

Whether to use weak or soft references in the segment cache (segments cached in memory). If true soft references will be used. Note, that once a load from a segment is completed the segment is no longer referenced and thus, if using weak references, subsequent loads from the same segment are likely to load the segment from disk again.

Default is true.

doDebug

public boolean doDebug

Constructor Detail

StorageConfiguration

public StorageConfiguration()