com.exalead.mercury.mami.indexing.v10

Class MaxSizeFullCompactPolicy

java.lang.Object

com.exalead.mercury.mami.indexing.v10.FullCompactPolicy

com.exalead.mercury.mami.indexing.v10.MaxSizeFullCompactPolicy

All Implemented Interfaces:

com.exalead.util.Checkable, java.io.Serializable

public class MaxSizeFullCompactPolicy
extends FullCompactPolicy
implements com.exalead.util.Checkable, java.io.Serializable

A FullCompactPolicy that compacts all slots into one whenever the "tail" of small slots exceeds a certain ratio of the large first slot.
This policy is appropriate when auto-compacts are restricted to slots under a certain size for performance reasons.
In this case, a full optimization can occasionally be triggered to purge the deletes.
If not, the deletes occurring in later slots would never be deleted, incurring performance costs at query-time and extra disk space consumption.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MIN_SLOTS
static int	DEFAULT_PERCENTAGE
int	minSlots
int	percentage

Constructor Summary

Constructors

Constructor and Description
MaxSizeFullCompactPolicy()
MaxSizeFullCompactPolicy(MaxSizeFullCompactPolicy o) Copy constructor

Method Summary

Modifier and Type	Method and Description
void	check(boolean deep, java.lang.String errorContext) Checks this MaxSizeFullCompactPolicy.
static MaxSizeFullCompactPolicy	fromString(java.lang.String s) String representation of this MaxSizeFullCompactPolicy.
int	getMinSlots() Minimum number of slots before triggering a full compact.
int	getPercentage() Minimum percentage to launch a full compaction. Compacts all slots into one whenever the "tail" of small slots exceeds a certain percentage of the large first slot. Eg: with percentage=100, when cumulated size of all slots except biggest is higher than size of the biggest slot, a full compact is triggered.
MaxSizeFullCompactPolicy	makeCopy() Creates and returns a deep copy of this MaxSizeFullCompactPolicy.
static MaxSizeFullCompactPolicy	readFrom(java.io.InputStream is) Read this MaxSizeFullCompactPolicy from an XML fragment.
void	setMinSlots(int minSlots) Minimum number of slots before triggering a full compact.
void	setPercentage(int percentage) Minimum percentage to launch a full compaction. Compacts all slots into one whenever the "tail" of small slots exceeds a certain percentage of the large first slot. Eg: with percentage=100, when cumulated size of all slots except biggest is higher than size of the biggest slot, a full compact is triggered.
java.lang.String	toString() String representation of this MaxSizeFullCompactPolicy.
MaxSizeFullCompactPolicy	withMinSlots(int minSlots)
MaxSizeFullCompactPolicy	withMinSlots(java.lang.Integer minSlots)
MaxSizeFullCompactPolicy	withPercentage(int percentage)
MaxSizeFullCompactPolicy	withPercentage(java.lang.Integer percentage)
void	writeTo(java.io.OutputStream os) Write this MaxSizeFullCompactPolicy as an XML fragment

Methods inherited from class java.lang.Object

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

Field Detail

percentage

public int percentage

DEFAULT_PERCENTAGE

public static final int DEFAULT_PERCENTAGE

See Also:

Constant Field Values

minSlots

public int minSlots

DEFAULT_MIN_SLOTS

public static final int DEFAULT_MIN_SLOTS

See Also:

Constant Field Values

Constructor Detail

MaxSizeFullCompactPolicy

public MaxSizeFullCompactPolicy()

MaxSizeFullCompactPolicy

public MaxSizeFullCompactPolicy(MaxSizeFullCompactPolicy o)

Copy constructor

Method Detail

setPercentage

public void setPercentage(int percentage)

Minimum percentage to launch a full compaction.
Compacts all slots into one whenever the "tail" of small slots exceeds a certain percentage of the large first slot.
Eg: with percentage=100, when cumulated size of all slots except biggest is higher than size of the biggest slot, a full compact is triggered.

getPercentage

public int getPercentage()

Minimum percentage to launch a full compaction.
Compacts all slots into one whenever the "tail" of small slots exceeds a certain percentage of the large first slot.
Eg: with percentage=100, when cumulated size of all slots except biggest is higher than size of the biggest slot, a full compact is triggered.

withPercentage

public MaxSizeFullCompactPolicy withPercentage(int percentage)

withPercentage

public MaxSizeFullCompactPolicy withPercentage(java.lang.Integer percentage)

setMinSlots

public void setMinSlots(int minSlots)

Minimum number of slots before triggering a full compact.

getMinSlots

public int getMinSlots()

Minimum number of slots before triggering a full compact.

withMinSlots

public MaxSizeFullCompactPolicy withMinSlots(int minSlots)

withMinSlots

public MaxSizeFullCompactPolicy withMinSlots(java.lang.Integer minSlots)

makeCopy

public MaxSizeFullCompactPolicy makeCopy()

Creates and returns a deep copy of this MaxSizeFullCompactPolicy.

Overrides:

makeCopy in class FullCompactPolicy

readFrom

public static MaxSizeFullCompactPolicy readFrom(java.io.InputStream is)
                                         throws javax.xml.bind.JAXBException

Read this MaxSizeFullCompactPolicy from an XML fragment.

Throws:

javax.xml.bind.JAXBException

writeTo

public void writeTo(java.io.OutputStream os)
             throws javax.xml.bind.JAXBException,
                    java.io.IOException

Write this MaxSizeFullCompactPolicy as an XML fragment

Overrides:

writeTo in class FullCompactPolicy

Throws:

javax.xml.bind.JAXBException

java.io.IOException

fromString

public static MaxSizeFullCompactPolicy fromString(java.lang.String s)
                                           throws javax.xml.bind.JAXBException,
                                                  java.io.UnsupportedEncodingException

String representation of this MaxSizeFullCompactPolicy.

Throws:

javax.xml.bind.JAXBException

java.io.UnsupportedEncodingException

toString

public java.lang.String toString()

String representation of this MaxSizeFullCompactPolicy.

Overrides:

toString in class FullCompactPolicy

check

public void check(boolean deep,
                  java.lang.String errorContext)
           throws com.exalead.util.TypedException

Checks this MaxSizeFullCompactPolicy.

Specified by:

check in interface com.exalead.util.Checkable

Overrides:

check in class FullCompactPolicy

Throws:

com.exalead.util.TypedException