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Star Tree File Formats (opensearch-project#14809)
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---------

Signed-off-by: Sarthak Aggarwal <[email protected]>
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@sarthakaggarwal97
sarthakaggarwal97 authored Sep 2, 2024
1 parent b54e867 commit 6bae704
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Showing 38 changed files with 3,479 additions and 823 deletions.
1 change: 1 addition & 0 deletions server/src/main/java/org/opensearch/index/codec/composite/CompositeIndexReader.java
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package org.opensearch.index.codec.composite;

import org.opensearch.common.annotation.ExperimentalApi;
import org.opensearch.index.compositeindex.datacube.startree.index.CompositeIndexValues;

import java.io.IOException;
import java.util.List;
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30 changes: 30 additions & 0 deletions ...ain/java/org/opensearch/index/codec/composite/composite99/Composite99DocValuesFormat.java
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Expand Up @@ -37,6 +37,36 @@ public class Composite99DocValuesFormat extends DocValuesFormat {
private final DocValuesFormat delegate;
private final MapperService mapperService;

/** Data codec name for Composite Doc Values Format */
public static final String DATA_CODEC_NAME = "Composite99FormatData";

/** Meta codec name for Composite Doc Values Format */
public static final String META_CODEC_NAME = "Composite99FormatMeta";

/** Filename extension for the composite index data */
public static final String DATA_EXTENSION = "cid";

/** Filename extension for the composite index meta */
public static final String META_EXTENSION = "cim";

/** Data doc values codec name for Composite Doc Values Format */
public static final String DATA_DOC_VALUES_CODEC = "Composite99DocValuesData";

/** Meta doc values codec name for Composite Doc Values Format */
public static final String META_DOC_VALUES_CODEC = "Composite99DocValuesMetadata";

/** Filename extension for the composite index data doc values */
public static final String DATA_DOC_VALUES_EXTENSION = "cidvd";

/** Filename extension for the composite index meta doc values */
public static final String META_DOC_VALUES_EXTENSION = "cidvm";

/** Initial version for the Composite90DocValuesFormat */
public static final int VERSION_START = 0;

/** Current version for the Composite90DocValuesFormat */
public static final int VERSION_CURRENT = VERSION_START;

// needed for SPI
public Composite99DocValuesFormat() {
this(new Lucene90DocValuesFormat(), null);
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231 changes: 221 additions & 10 deletions ...ain/java/org/opensearch/index/codec/composite/composite99/Composite99DocValuesReader.java
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package org.opensearch.index.codec.composite.composite99;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.lucene.codecs.CodecUtil;
import org.apache.lucene.codecs.DocValuesProducer;
import org.apache.lucene.index.BinaryDocValues;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.FieldInfo;
import org.apache.lucene.index.FieldInfos;
import org.apache.lucene.index.IndexFileNames;
import org.apache.lucene.index.NumericDocValues;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.index.SortedDocValues;
import org.apache.lucene.index.SortedNumericDocValues;
import org.apache.lucene.index.SortedSetDocValues;
import org.apache.lucene.store.ChecksumIndexInput;
import org.apache.lucene.store.IndexInput;
import org.opensearch.common.annotation.ExperimentalApi;
import org.opensearch.common.util.io.IOUtils;
import org.opensearch.index.codec.composite.CompositeIndexFieldInfo;
import org.opensearch.index.codec.composite.CompositeIndexReader;
import org.opensearch.index.codec.composite.CompositeIndexValues;
import org.opensearch.index.codec.composite.LuceneDocValuesProducerFactory;
import org.opensearch.index.compositeindex.CompositeIndexMetadata;
import org.opensearch.index.compositeindex.datacube.Metric;
import org.opensearch.index.compositeindex.datacube.MetricStat;
import org.opensearch.index.compositeindex.datacube.startree.fileformats.meta.StarTreeMetadata;
import org.opensearch.index.compositeindex.datacube.startree.index.CompositeIndexValues;
import org.opensearch.index.compositeindex.datacube.startree.index.StarTreeValues;
import org.opensearch.index.mapper.CompositeMappedFieldType;

import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import static org.opensearch.index.compositeindex.CompositeIndexConstants.COMPOSITE_FIELD_MARKER;
import static org.opensearch.index.compositeindex.datacube.startree.fileformats.StarTreeWriter.VERSION_CURRENT;
import static org.opensearch.index.compositeindex.datacube.startree.utils.StarTreeUtils.fullyQualifiedFieldNameForStarTreeDimensionsDocValues;
import static org.opensearch.index.compositeindex.datacube.startree.utils.StarTreeUtils.fullyQualifiedFieldNameForStarTreeMetricsDocValues;
import static org.opensearch.index.compositeindex.datacube.startree.utils.StarTreeUtils.getFieldInfoList;

/**
* Reader for star tree index and star tree doc values from the segments
Expand All @@ -32,11 +57,158 @@
*/
@ExperimentalApi
public class Composite99DocValuesReader extends DocValuesProducer implements CompositeIndexReader {
private DocValuesProducer delegate;
private static final Logger logger = LogManager.getLogger(Composite99DocValuesReader.class);

private final DocValuesProducer delegate;
private IndexInput dataIn;
private ChecksumIndexInput metaIn;
private final Map<String, IndexInput> compositeIndexInputMap = new LinkedHashMap<>();
private final Map<String, CompositeIndexMetadata> compositeIndexMetadataMap = new LinkedHashMap<>();
private final List<String> fields;
private DocValuesProducer compositeDocValuesProducer;
private final List<CompositeIndexFieldInfo> compositeFieldInfos = new ArrayList<>();
private SegmentReadState readState;

public Composite99DocValuesReader(DocValuesProducer producer, SegmentReadState state) throws IOException {
public Composite99DocValuesReader(DocValuesProducer producer, SegmentReadState readState) throws IOException {
this.delegate = producer;
// TODO : read star tree files
this.fields = new ArrayList<>();

String metaFileName = IndexFileNames.segmentFileName(
readState.segmentInfo.name,
readState.segmentSuffix,
Composite99DocValuesFormat.META_EXTENSION
);

String dataFileName = IndexFileNames.segmentFileName(
readState.segmentInfo.name,
readState.segmentSuffix,
Composite99DocValuesFormat.DATA_EXTENSION
);

boolean success = false;
try {

// initialize meta input
dataIn = readState.directory.openInput(dataFileName, readState.context);
CodecUtil.checkIndexHeader(
dataIn,
Composite99DocValuesFormat.DATA_CODEC_NAME,
Composite99DocValuesFormat.VERSION_START,
Composite99DocValuesFormat.VERSION_CURRENT,
readState.segmentInfo.getId(),
readState.segmentSuffix
);

// initialize data input
metaIn = readState.directory.openChecksumInput(metaFileName, readState.context);
Throwable priorE = null;
try {
CodecUtil.checkIndexHeader(
metaIn,
Composite99DocValuesFormat.META_CODEC_NAME,
Composite99DocValuesFormat.VERSION_START,
Composite99DocValuesFormat.VERSION_CURRENT,
readState.segmentInfo.getId(),
readState.segmentSuffix
);

while (true) {

// validate magic marker
long magicMarker = metaIn.readLong();
if (magicMarker == -1) {
break;
} else if (magicMarker < 0) {
throw new CorruptIndexException("Unknown token encountered: " + magicMarker, metaIn);
} else if (COMPOSITE_FIELD_MARKER != magicMarker) {
logger.error("Invalid composite field magic marker");
throw new IOException("Invalid composite field magic marker");
}

int version = metaIn.readVInt();
if (VERSION_CURRENT != version) {
logger.error("Invalid composite field version");
throw new IOException("Invalid composite field version");
}

// construct composite index metadata
String compositeFieldName = metaIn.readString();
CompositeMappedFieldType.CompositeFieldType compositeFieldType = CompositeMappedFieldType.CompositeFieldType.fromName(
metaIn.readString()
);

switch (compositeFieldType) {
case STAR_TREE:
StarTreeMetadata starTreeMetadata = new StarTreeMetadata(
metaIn,
compositeFieldName,
compositeFieldType,
version
);
compositeFieldInfos.add(new CompositeIndexFieldInfo(compositeFieldName, compositeFieldType));

IndexInput starTreeIndexInput = dataIn.slice(
"star-tree data slice for respective star-tree fields",
starTreeMetadata.getDataStartFilePointer(),
starTreeMetadata.getDataLength()
);
compositeIndexInputMap.put(compositeFieldName, starTreeIndexInput);
compositeIndexMetadataMap.put(compositeFieldName, starTreeMetadata);

List<String> dimensionFields = starTreeMetadata.getDimensionFields();

// generating star tree unique fields (fully qualified name for dimension and metrics)
for (String dimensions : dimensionFields) {
fields.add(fullyQualifiedFieldNameForStarTreeDimensionsDocValues(compositeFieldName, dimensions));
}

// adding metric fields
for (Metric metric : starTreeMetadata.getMetrics()) {
for (MetricStat metricStat : metric.getMetrics()) {
fields.add(
fullyQualifiedFieldNameForStarTreeMetricsDocValues(
compositeFieldName,
metric.getField(),
metricStat.getTypeName()
)
);

}
}

break;
default:
throw new CorruptIndexException("Invalid composite field type found in the file", dataIn);
}
}

// populates the dummy list of field infos to fetch doc id set iterators for respective fields.
// the dummy field info is used to fetch the doc id set iterators for respective fields based on field name
FieldInfos fieldInfos = new FieldInfos(getFieldInfoList(fields));
this.readState = new SegmentReadState(readState.directory, readState.segmentInfo, fieldInfos, readState.context);

// initialize star-tree doc values producer

compositeDocValuesProducer = LuceneDocValuesProducerFactory.getDocValuesProducerForCompositeCodec(
Composite99Codec.COMPOSITE_INDEX_CODEC_NAME,
this.readState,
Composite99DocValuesFormat.DATA_DOC_VALUES_CODEC,
Composite99DocValuesFormat.DATA_DOC_VALUES_EXTENSION,
Composite99DocValuesFormat.META_DOC_VALUES_CODEC,
Composite99DocValuesFormat.META_DOC_VALUES_EXTENSION
);

} catch (Throwable t) {
priorE = t;
} finally {
CodecUtil.checkFooter(metaIn, priorE);
}
success = true;
} finally {
if (success == false) {
IOUtils.closeWhileHandlingException(this);
}
}
}

@Override
Expand Down Expand Up @@ -67,24 +239,63 @@ public SortedSetDocValues getSortedSet(FieldInfo field) throws IOException {
@Override
public void checkIntegrity() throws IOException {
delegate.checkIntegrity();
// Todo : check integrity of composite index related [star tree] files
CodecUtil.checksumEntireFile(dataIn);
}

@Override
public void close() throws IOException {
delegate.close();
// Todo: close composite index related files [star tree] files
boolean success = false;
try {
IOUtils.close(metaIn, dataIn);
IOUtils.close(compositeDocValuesProducer);
success = true;
} finally {
if (!success) {
IOUtils.closeWhileHandlingException(metaIn, dataIn);
}
compositeIndexInputMap.clear();
compositeIndexMetadataMap.clear();
fields.clear();
metaIn = null;
dataIn = null;
}
}

@Override
public List<CompositeIndexFieldInfo> getCompositeIndexFields() {
// todo : read from file formats and get the field names.
return new ArrayList<>();
return compositeFieldInfos;
}

@Override
public CompositeIndexValues getCompositeIndexValues(CompositeIndexFieldInfo compositeIndexFieldInfo) throws IOException {
// TODO : read compositeIndexValues [starTreeValues] from star tree files
throw new UnsupportedOperationException();

switch (compositeIndexFieldInfo.getType()) {
case STAR_TREE:
return new StarTreeValues(
compositeIndexMetadataMap.get(compositeIndexFieldInfo.getField()),
compositeIndexInputMap.get(compositeIndexFieldInfo.getField()),
compositeDocValuesProducer,
this.readState
);

default:
throw new CorruptIndexException("Unsupported composite index field type: ", compositeIndexFieldInfo.getType().getName());
}

}

/**
* Returns the sorted numeric doc values for the given sorted numeric field.
* If the sorted numeric field is null, it returns an empty doc id set iterator.
* <p>
* Sorted numeric field can be null for cases where the segment doesn't hold a particular value.
*
* @param sortedNumeric the sorted numeric doc values for a field
* @return empty sorted numeric values if the field is not present, else sortedNumeric
*/
public static SortedNumericDocValues getSortedNumericDocValues(SortedNumericDocValues sortedNumeric) {
return sortedNumeric == null ? DocValues.emptySortedNumeric() : sortedNumeric;
}

}
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