Package org.apache.solr.handler.admin

Class IndexSizeEstimator

java.lang.Object

org.apache.solr.handler.admin.IndexSizeEstimator

public class IndexSizeEstimator
extends Object

Estimates the raw size of all uncompressed indexed data by scanning term, docValues and stored fields data. This utility also provides detailed statistics about term, docValues, postings and stored fields distributions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	IndexSizeEstimator.Estimate
static class	IndexSizeEstimator.Item
static class	IndexSizeEstimator.ItemPriorityQueue
static class	IndexSizeEstimator.MapWriterSummaryStatistics

Field Summary

Fields

Modifier and Type	Field	Description
static final float	DEFAULT_SAMPLING_PERCENT
static final int	DEFAULT_SAMPLING_THRESHOLD
static final String	DETAILS
static final String	DOC_VALUES
static final String	FIELDS_BY_SIZE
static final String	NORMS
static final String	POINTS
static final String	STORED_FIELDS
static final String	SUMMARY
static final String	TERM_VECTORS
static final String	TERMS
static final String	TYPES_BY_SIZE

Constructor Summary

Constructors

Constructor	Description
IndexSizeEstimator(org.apache.lucene.index.IndexReader reader, int topN, int maxLength, boolean withSummary, boolean withDetails)

Method Summary

Modifier and Type	Method	Description
IndexSizeEstimator.Estimate	estimate()
static void	main(String[] args)
void	setSamplingPercent(float percent)	Sampling percent (a number greater than 0 and less or equal to 100).
void	setSamplingThreshold(int threshold)	Set the sampling threshold.

Methods inherited from class java.lang.Object

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

Field Details

TERMS

public static final String TERMS

See Also:

• Constant Field Values

STORED_FIELDS

public static final String STORED_FIELDS

See Also:

• Constant Field Values

NORMS

public static final String NORMS

See Also:

• Constant Field Values

DOC_VALUES

public static final String DOC_VALUES

See Also:

• Constant Field Values

POINTS

public static final String POINTS

See Also:

• Constant Field Values

TERM_VECTORS

public static final String TERM_VECTORS

See Also:

• Constant Field Values

SUMMARY

public static final String SUMMARY

See Also:

• Constant Field Values

DETAILS

public static final String DETAILS

See Also:

• Constant Field Values

FIELDS_BY_SIZE

public static final String FIELDS_BY_SIZE

See Also:

• Constant Field Values

TYPES_BY_SIZE

public static final String TYPES_BY_SIZE

See Also:

• Constant Field Values

DEFAULT_SAMPLING_THRESHOLD

public static final int DEFAULT_SAMPLING_THRESHOLD

See Also:

• Constant Field Values

DEFAULT_SAMPLING_PERCENT

public static final float DEFAULT_SAMPLING_PERCENT

See Also:

• Constant Field Values

Constructor Details

IndexSizeEstimator

public IndexSizeEstimator(org.apache.lucene.index.IndexReader reader,
 int topN,
 int maxLength,
 boolean withSummary,
 boolean withDetails)

Method Details

setSamplingThreshold

public void setSamplingThreshold(int threshold)

Set the sampling threshold. If the index has more documents than this threshold then only some values will be sampled and the totals will be extrapolated.

Parameters:

threshold - size threshold (number of documents). Default value is DEFAULT_SAMPLING_THRESHOLD. Setting this to values <= 0 means no threshold (and no sampling).

setSamplingPercent

public void setSamplingPercent(float percent)
                        throws IllegalArgumentException

Sampling percent (a number greater than 0 and less or equal to 100). When index size exceeds the threshold then approximately only this percent of data will be retrieved from the index and the totals will be extrapolated.

Parameters:

percent - sample percent. Default value is DEFAULT_SAMPLING_PERCENT.

Throws:

IllegalArgumentException - when value is less than or equal to 0.0 or greater than 100.0, or the sampling percent is so small that less than 10 documents would be sampled.

estimate

public IndexSizeEstimator.Estimate estimate()
                                     throws Exception

Throws:

Exception

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception