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LUCENE-9539: Use more compact datastructures for sorting doc-values (#1908) 

This change cuts over from object based data-structures to primitive / compressed data-structures.
This commit is contained in:
Simon Willnauer 2020-09-22 15:10:53 +02:00 committed by GitHub
parent 1611586417
commit c82b99464d
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5 changed files with 135 additions and 128 deletions
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3
lucene/CHANGES.txt
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@ -238,6 +238,9 @@ Improvements
* LUCENE-9523: In query shapes over shape fields, skip points while traversing the
BKD tree when the relationship with the document is already known. (Ignacio Vera)
* LUCENE-9539: Use more compact datastructures to represent sorted doc-values in memory when
sorting a segment before flush and in SortingCodecReader. (Simon Willnauer)
Optimizations
---------------------

62
lucene/core/src/java/org/apache/lucene/index/BinaryDocValuesWriter.java
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@ -24,11 +24,10 @@ import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.store.DataInput;
import org.apache.lucene.store.DataOutput;
import org.apache.lucene.util.ArrayUtil;
import org.apache.lucene.util.BitSet;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefArray;
import org.apache.lucene.util.BytesRefBuilder;
import org.apache.lucene.util.Counter;
import org.apache.lucene.util.FixedBitSet;
import org.apache.lucene.util.PagedBytes;
import org.apache.lucene.util.packed.PackedInts;
import org.apache.lucene.util.packed.PackedLongValues;
@ -58,7 +57,7 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
private PackedLongValues finalLengths;
public BinaryDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
BinaryDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
this.fieldInfo = fieldInfo;
this.bytes = new PagedBytes(BLOCK_BITS);
this.bytesOut = bytes.getDataOutput();
@ -100,21 +99,6 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
bytesUsed = newBytesUsed;
}
static CachedBinaryDVs sortDocValues(int maxDoc, Sorter.DocMap sortMap, BinaryDocValues oldValues) throws IOException {
FixedBitSet docsWithField = new FixedBitSet(maxDoc);
BytesRef[] values = new BytesRef[maxDoc];
while (true) {
int docID = oldValues.nextDoc();
if (docID == NO_MORE_DOCS) {
break;
}
int newDocID = sortMap.oldToNew(docID);
docsWithField.set(newDocID);
values[newDocID] = BytesRef.deepCopyOf(oldValues.binaryValue());
}
return new CachedBinaryDVs(values, docsWithField);
}
@Override
BinaryDocValues getDocValues() {
if (finalLengths == null) {
@ -131,7 +115,7 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
}
final CachedBinaryDVs sorted;
if (sortMap != null) {
sorted = sortDocValues(state.segmentInfo.maxDoc(), sortMap,
sorted = new CachedBinaryDVs(state.segmentInfo.maxDoc(), sortMap,
new BufferedBinaryDocValues(finalLengths, maxLength, bytes.getDataInput(), docsWithField.iterator()));
} else {
sorted = null;
@ -206,8 +190,8 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
static class SortingBinaryDocValues extends BinaryDocValues {
private final CachedBinaryDVs dvs;
private final BytesRefBuilder spare = new BytesRefBuilder();
private int docID = -1;
private long cost = -1;
SortingBinaryDocValues(CachedBinaryDVs dvs) {
this.dvs = dvs;
@ -215,11 +199,12 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
@Override
public int nextDoc() {
if (docID+1 == dvs.docsWithField.length()) {
docID = NO_MORE_DOCS;
} else {
docID = dvs.docsWithField.nextSetBit(docID+1);
do {
docID++;
if (docID == dvs.offsets.length) {
return docID = NO_MORE_DOCS;
}
} while (dvs.offsets[docID] <= 0);
return docID;
}
@ -240,26 +225,29 @@ class BinaryDocValuesWriter extends DocValuesWriter<BinaryDocValues> {
@Override
public BytesRef binaryValue() {
return dvs.values[docID];
dvs.values.get(spare, dvs.offsets[docID]-1);
return spare.get();
}
@Override
public long cost() {
if (cost == -1) {
cost = dvs.docsWithField.cardinality();
}
return cost;
return dvs.values.size();
}
}
static class CachedBinaryDVs {
// TODO: at least cutover to BytesRefArray here:
private final BytesRef[] values;
private final BitSet docsWithField;
CachedBinaryDVs(BytesRef[] values, BitSet docsWithField) {
this.values = values;
this.docsWithField = docsWithField;
static final class CachedBinaryDVs {
final int[] offsets;
final BytesRefArray values;
CachedBinaryDVs(int maxDoc, Sorter.DocMap sortMap, BinaryDocValues oldValues) throws IOException {
offsets = new int[maxDoc];
values = new BytesRefArray(Counter.newCounter());
int offset = 1; // 0 means no values for this document
int docID;
while ((docID = oldValues.nextDoc()) != NO_MORE_DOCS) {
int newDocID = sortMap.oldToNew(docID);
values.append(oldValues.binaryValue());
offsets[newDocID] = offset++;
}
}
}
}

76
lucene/core/src/java/org/apache/lucene/index/SortedNumericDocValuesWriter.java
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@ -39,13 +39,13 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
private long bytesUsed; // this only tracks differences in 'pending' and 'pendingCounts'
private final FieldInfo fieldInfo;
private int currentDoc = -1;
private long currentValues[] = new long[8];
private long[] currentValues = new long[8];
private int currentUpto = 0;
private PackedLongValues finalValues;
private PackedLongValues finalValuesCount;
public SortedNumericDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
SortedNumericDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
this.fieldInfo = fieldInfo;
this.iwBytesUsed = iwBytesUsed;
pending = PackedLongValues.deltaPackedBuilder(PackedInts.COMPACT);
@ -108,18 +108,28 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
return new BufferedSortedNumericDocValues(finalValues, finalValuesCount, docsWithField.iterator());
}
static long[][] sortDocValues(int maxDoc, Sorter.DocMap sortMap, SortedNumericDocValues oldValues) throws IOException {
long[][] values = new long[maxDoc][];
static final class LongValues {
final long[] offsets;
final PackedLongValues values;
LongValues(int maxDoc, Sorter.DocMap sortMap, SortedNumericDocValues oldValues, float acceptableOverheadRatio) throws IOException {
offsets = new long[maxDoc];
PackedLongValues.Builder valuesBuiler = PackedLongValues.packedBuilder(acceptableOverheadRatio);
int docID;
long offsetIndex = 1; // 0 means the doc has no values
while ((docID = oldValues.nextDoc()) != NO_MORE_DOCS) {
int newDocID = sortMap.oldToNew(docID);
long[] docValues = new long[oldValues.docValueCount()];
for (int i = 0; i < docValues.length; i++) {
docValues[i] = oldValues.nextValue();
int numValues = oldValues.docValueCount();
valuesBuiler.add(numValues);
offsets[newDocID] = offsetIndex++;
for (int i = 0; i < numValues; i++) {
valuesBuiler.add(oldValues.nextValue());
offsetIndex++;
}
values[newDocID] = docValues;
}
return values;
values = valuesBuiler.build();
}
}
@Override
@ -135,10 +145,10 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
valueCounts = finalValuesCount;
}
final long[][] sorted;
final LongValues sorted;
if (sortMap != null) {
sorted = sortDocValues(state.segmentInfo.maxDoc(), sortMap,
new BufferedSortedNumericDocValues(values, valueCounts, docsWithField.iterator()));
sorted = new LongValues(state.segmentInfo.maxDoc(), sortMap,
new BufferedSortedNumericDocValues(values, valueCounts, docsWithField.iterator()), PackedInts.FASTEST);
} else {
sorted = null;
}
@ -225,11 +235,13 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
static class SortingSortedNumericDocValues extends SortedNumericDocValues {
private final SortedNumericDocValues in;
private final long[][] values;
private final LongValues values;
private int docID = -1;
private int upto;
private long upto;
private int numValues = - 1;
private long limit;
SortingSortedNumericDocValues(SortedNumericDocValues in, long[][] values) {
SortingSortedNumericDocValues(SortedNumericDocValues in, LongValues values) {
this.in = in;
this.values = values;
}
@ -241,18 +253,15 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
@Override
public int nextDoc() {
while (true) {
do {
docID++;
if (docID == values.length) {
docID = NO_MORE_DOCS;
break;
if (docID >= values.offsets.length) {
return docID = NO_MORE_DOCS;
}
if (values[docID] != null) {
break;
}
// skip missing docs
}
upto = 0;
} while (values.offsets[docID] <= 0);
upto = values.offsets[docID];
numValues = Math.toIntExact(values.values.get(upto-1));
limit = upto + numValues;
return docID;
}
@ -264,16 +273,23 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
@Override
public boolean advanceExact(int target) throws IOException {
docID = target;
upto = 0;
return values[docID] != null;
upto = values.offsets[docID];
if (values.offsets[docID] > 0) {
numValues = Math.toIntExact(values.values.get(upto-1));
limit = upto + numValues;
return true;
} else {
limit = upto;
}
return false;
}
@Override
public long nextValue() {
if (upto == values[docID].length) {
if (upto == limit) {
throw new AssertionError();
} else {
return values[docID][upto++];
return values.values.get(upto++);
}
}
@ -284,7 +300,7 @@ class SortedNumericDocValuesWriter extends DocValuesWriter<SortedNumericDocValue
@Override
public int docValueCount() {
return values[docID].length;
return numValues;
}
}
}

98
lucene/core/src/java/org/apache/lucene/index/SortedSetDocValuesWriter.java
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@ -45,7 +45,7 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
private long bytesUsed; // this only tracks differences in 'pending' and 'pendingCounts'
private final FieldInfo fieldInfo;
private int currentDoc = -1;
private int currentValues[] = new int[8];
private int[] currentValues = new int[8];
private int currentUpto;
private int maxCount;
@ -55,7 +55,7 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
private int[] finalOrdMap;
public SortedSetDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
SortedSetDocValuesWriter(FieldInfo fieldInfo, Counter iwBytesUsed) {
this.fieldInfo = fieldInfo;
this.iwBytesUsed = iwBytesUsed;
hash = new BytesRefHash(
@ -139,28 +139,6 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
bytesUsed = newBytesUsed;
}
static long[][] sortDocValues(int maxDoc, Sorter.DocMap sortMap, SortedSetDocValues oldValues) throws IOException {
long[][] ords = new long[maxDoc][];
int docID;
while ((docID = oldValues.nextDoc()) != NO_MORE_DOCS) {
int newDocID = sortMap.oldToNew(docID);
long[] docOrds = new long[1];
int upto = 0;
while (true) {
long ord = oldValues.nextOrd();
if (ord == NO_MORE_ORDS) {
break;
}
if (upto == docOrds.length) {
docOrds = ArrayUtil.grow(docOrds);
}
docOrds[upto++] = ord;
}
ords[newDocID] = ArrayUtil.copyOfSubArray(docOrds, 0, upto);
}
return ords;
}
@Override
SortedSetDocValues getDocValues() {
if (finalOrds == null) {
@ -203,12 +181,12 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
ordMap = finalOrdMap;
}
final long[][] sorted;
final DocOrds docOrds;
if (sortMap != null) {
sorted = sortDocValues(state.segmentInfo.maxDoc(), sortMap,
new BufferedSortedSetDocValues(sortedValues, ordMap, hash, ords, ordCounts, maxCount, docsWithField.iterator()));
docOrds = new DocOrds(state.segmentInfo.maxDoc(), sortMap,
new BufferedSortedSetDocValues(sortedValues, ordMap, hash, ords, ordCounts, maxCount, docsWithField.iterator()), PackedInts.FASTEST);
} else {
sorted = null;
docOrds = null;
}
dvConsumer.addSortedSetField(fieldInfo,
new EmptyDocValuesProducer() {
@ -219,10 +197,10 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
}
final SortedSetDocValues buf =
new BufferedSortedSetDocValues(sortedValues, ordMap, hash, ords, ordCounts, maxCount, docsWithField.iterator());
if (sorted == null) {
if (docOrds == null) {
return buf;
} else {
return new SortingSortedSetDocValues(buf, sorted);
return new SortingSortedSetDocValues(buf, docOrds);
}
}
});
@ -236,7 +214,7 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
final PackedLongValues.Iterator ordsIter;
final PackedLongValues.Iterator ordCountsIter;
final DocIdSetIterator docsWithField;
final int currentDoc[];
final int[] currentDoc;
private int ordCount;
private int ordUpto;
@ -311,11 +289,11 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
static class SortingSortedSetDocValues extends SortedSetDocValues {
private final SortedSetDocValues in;
private final long[][] ords;
private final DocOrds ords;
private int docID = -1;
private int ordUpto;
private long ordUpto;
SortingSortedSetDocValues(SortedSetDocValues in, long[][] ords) {
SortingSortedSetDocValues(SortedSetDocValues in, DocOrds ords) {
this.in = in;
this.ords = ords;
}
@ -327,18 +305,13 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
@Override
public int nextDoc() {
while (true) {
do {
docID++;
if (docID == ords.length) {
docID = NO_MORE_DOCS;
break;
if (docID == ords.offsets.length) {
return docID = NO_MORE_DOCS;
}
if (ords[docID] != null) {
break;
}
// skip missing docs
}
ordUpto = 0;
} while (ords.offsets[docID] <= 0);
ordUpto = ords.offsets[docID]-1;
return docID;
}
@ -351,16 +324,16 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
public boolean advanceExact(int target) throws IOException {
// needed in IndexSorter#StringSorter
docID = target;
ordUpto = 0;
return ords[docID] != null;
ordUpto = ords.offsets[docID]-1;
return ords.offsets[docID] > 0;
}
@Override
public long nextOrd() {
if (ordUpto == ords[docID].length) {
long ord = ords.ords.get(ordUpto++);
if (ord == 0) {
return NO_MORE_ORDS;
} else {
return ords[docID][ordUpto++];
return ord - 1 ;
}
}
@ -379,4 +352,31 @@ class SortedSetDocValuesWriter extends DocValuesWriter<SortedSetDocValues> {
return in.getValueCount();
}
}
static final class DocOrds {
final long[] offsets;
final PackedLongValues ords;
DocOrds(int maxDoc, Sorter.DocMap sortMap, SortedSetDocValues oldValues, float acceptableOverheadRatio) throws IOException {
offsets = new long[maxDoc];
PackedLongValues.Builder builder = PackedLongValues.packedBuilder(acceptableOverheadRatio);
long ordOffset = 1; // 0 marks docs with no values
int docID;
while ((docID = oldValues.nextDoc()) != NO_MORE_DOCS) {
int newDocID = sortMap.oldToNew(docID);
long startOffset = ordOffset;
long ord;
while ((ord = oldValues.nextOrd()) != NO_MORE_ORDS) {
builder.add(ord + 1);
ordOffset++;
}
if (startOffset != ordOffset) { // do we have any values?
offsets[newDocID] = startOffset;
builder.add(0); // 0 ord marks next value
ordOffset++;
}
}
ords = builder.build();
}
}
}

16
lucene/core/src/java/org/apache/lucene/index/SortingCodecReader.java
View File

@ -32,6 +32,7 @@ import org.apache.lucene.codecs.TermVectorsReader;
import org.apache.lucene.search.Sort;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.FixedBitSet;
import org.apache.lucene.util.packed.PackedInts;
import static org.apache.lucene.search.DocIdSetIterator.NO_MORE_DOCS;
@ -51,10 +52,9 @@ public final class SortingCodecReader extends FilterCodecReader {
private final Map<String, int[]> cachedSortedDVs = new HashMap<>();
// TODO: pack long[][] into an int[] (offset) and long[] instead:
private final Map<String, long[][]> cachedSortedSetDVs = new HashMap<>();
private final Map<String, SortedSetDocValuesWriter.DocOrds> cachedSortedSetDVs = new HashMap<>();
private final Map<String, long[][]> cachedSortedNumericDVs = new HashMap<>();
private final Map<String, SortedNumericDocValuesWriter.LongValues> cachedSortedNumericDVs = new HashMap<>();
private static class SortingBits implements Bits {
@ -381,7 +381,7 @@ public final class SortingCodecReader extends FilterCodecReader {
synchronized (cachedBinaryDVs) {
dvs = cachedBinaryDVs.get(field);
if (dvs == null) {
dvs = BinaryDocValuesWriter.sortDocValues(maxDoc(), docMap, oldDocValues);
dvs = new BinaryDocValuesWriter.CachedBinaryDVs(maxDoc(), docMap, oldDocValues);
cachedBinaryDVs.put(field.name, dvs);
}
}
@ -412,11 +412,11 @@ public final class SortingCodecReader extends FilterCodecReader {
@Override
public SortedNumericDocValues getSortedNumeric(FieldInfo field) throws IOException {
final SortedNumericDocValues oldDocValues = delegate.getSortedNumeric(field);
long[][] values;
SortedNumericDocValuesWriter.LongValues values;
synchronized (cachedSortedNumericDVs) {
values = cachedSortedNumericDVs.get(field);
if (values == null) {
values = SortedNumericDocValuesWriter.sortDocValues(maxDoc(), docMap, oldDocValues);
values = new SortedNumericDocValuesWriter.LongValues(maxDoc(), docMap, oldDocValues, PackedInts.FAST);
cachedSortedNumericDVs.put(field.name, values);
}
}
@ -427,11 +427,11 @@ public final class SortingCodecReader extends FilterCodecReader {
@Override
public SortedSetDocValues getSortedSet(FieldInfo field) throws IOException {
SortedSetDocValues oldDocValues = delegate.getSortedSet(field);
long[][] ords;
SortedSetDocValuesWriter.DocOrds ords;
synchronized (cachedSortedSetDVs) {
ords = cachedSortedSetDVs.get(field);
if (ords == null) {
ords = SortedSetDocValuesWriter.sortDocValues(maxDoc(), docMap, oldDocValues);
ords = new SortedSetDocValuesWriter.DocOrds(maxDoc(), docMap, oldDocValues, PackedInts.FASTEST);
cachedSortedSetDVs.put(field.name, ords);
}
}