mikemccand commented on issue #13867:
URL: https://github.com/apache/lucene/issues/13867#issuecomment-2400927997
> I am struggling to create the 9.10.0 `int8_hnsw.9.10.0.zip`
OK, I managed to generate this. I copied the
`TestInt8HnswBackwardsCompatibility.java` from 9.12.x source to 9.10.0, tweaked
the imports a bit because `Lucene99Codec` is in core not `backwards-codecs`,
and was able to then generate and zip up `int8_hnsw.9.10.0.zip`. Here are my
full diffs on 9.10.0:
```
diff --git
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/BackwardsCompatibilityTestBase.java
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/BackwardsCompatibilityTestBase.java
index eb832888ddd..411c8068b59 100644
---
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/BackwardsCompatibilityTestBase.java
+++
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/BackwardsCompatibilityTestBase.java
@@ -86,7 +86,7 @@ public abstract class BackwardsCompatibilityTestBase
extends LuceneTestCase {
* This is a base constructor for parameterized BWC tests. The
constructor arguments are provided
* by {@link com.carrotsearch.randomizedtesting.RandomizedRunner} during
test execution. A {@link
* com.carrotsearch.randomizedtesting.annotations.ParametersFactory}
specified in a subclass
- * provides a list lists of arguments for the tests and RandomizedRunner
will execute the test for
+ * provides a list of arguments for the tests and RandomizedRunner will
execute the test for
* each of the argument list.
*
* @param version the version this test should run for
diff --git
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestBasicBackwardsCompatibility.java
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestBasicBackwardsCompatibility.java
index 2805de744cc..7ddb5320935 100644
---
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestBasicBackwardsCompatibility.java
+++
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestBasicBackwardsCompatibility.java
@@ -513,7 +513,7 @@ public class TestBasicBackwardsCompatibility extends
BackwardsCompatibilityTestB
}
}
- private static ScoreDoc[] assertKNNSearch(
+ static ScoreDoc[] assertKNNSearch(
IndexSearcher searcher,
float[] queryVector,
int k,
diff --git
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestGenerateBwcIndices.java
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestGenerateBwcIndices.java
index 0cd9f37d5c3..b7fedfb8749 100644
---
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestGenerateBwcIndices.java
+++
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestGenerateBwcIndices.java
@@ -37,7 +37,7 @@ public class TestGenerateBwcIndices extends LuceneTestCase
{
// To generate backcompat indexes with the current default codec, run the
following gradle
// command:
// gradlew test -Ptests.bwcdir=/path/to/store/indexes
-Ptests.codec=default
- // -Ptests.useSecurityManager=false --tests
TestGenerateBwcIndices
+ // -Ptests.useSecurityManager=false --tests
TestGenerateBwcIndices --max-workers=1
//
// Also add testmethod with one of the index creation methods below, for
example:
// -Ptestmethod=testCreateCFS
@@ -80,6 +80,16 @@ public class TestGenerateBwcIndices extends
LuceneTestCase {
sortedTest.createBWCIndex();
}
+ public void testCreateInt8HNSWIndices() throws IOException {
+ TestInt8HnswBackwardsCompatibility int8HnswBackwardsCompatibility =
+ new TestInt8HnswBackwardsCompatibility(
+ Version.LATEST,
+ createPattern(
+ TestInt8HnswBackwardsCompatibility.INDEX_NAME,
+ TestInt8HnswBackwardsCompatibility.SUFFIX));
+ int8HnswBackwardsCompatibility.createBWCIndex();
+ }
+
private boolean isInitialMajorVersionRelease() {
return Version.LATEST.equals(Version.fromBits(Version.LATEST.major, 0,
0));
}
diff --git
a/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestInt8HnswBackwardsCompatibility.java
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestInt8HnswBackwardsCompatibility.java
new file mode 100644
index 00000000000..e69fa2f0e58
--- /dev/null
+++
b/lucene/backward-codecs/src/test/org/apache/lucene/backward_index/TestInt8HnswBackwardsCompatibility.java
@@ -0,0 +1,150 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.lucene.backward_index;
+
+import static
org.apache.lucene.backward_index.TestBasicBackwardsCompatibility.assertKNNSearch;
+
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+import java.io.IOException;
+import org.apache.lucene.codecs.lucene99.Lucene99Codec;
+import org.apache.lucene.codecs.Codec;
+import org.apache.lucene.codecs.KnnVectorsFormat;
+import
org.apache.lucene.codecs.lucene99.Lucene99HnswScalarQuantizedVectorsFormat;
+import org.apache.lucene.codecs.lucene99.Lucene99HnswVectorsFormat;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.document.FieldType;
+import org.apache.lucene.document.KnnFloatVectorField;
+import org.apache.lucene.document.StringField;
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.index.IndexWriterConfig;
+import org.apache.lucene.index.NoMergePolicy;
+import org.apache.lucene.index.VectorSimilarityFunction;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.store.Directory;
+import org.apache.lucene.tests.analysis.MockAnalyzer;
+import org.apache.lucene.tests.util.TestUtil;
+import org.apache.lucene.util.Version;
+
+public class TestInt8HnswBackwardsCompatibility extends
BackwardsCompatibilityTestBase {
+
+ static final String INDEX_NAME = "int8_hnsw";
+ static final String SUFFIX = "";
+ private static final Version FIRST_INT8_HNSW_VERSION =
Version.LUCENE_9_10_0;
+ private static final String KNN_VECTOR_FIELD = "knn_field";
+ private static final int DOC_COUNT = 30;
+ private static final FieldType KNN_VECTOR_FIELD_TYPE =
+ KnnFloatVectorField.createFieldType(3,
VectorSimilarityFunction.COSINE);
+ private static final float[] KNN_VECTOR = {0.2f, -0.1f, 0.1f};
+
+ public TestInt8HnswBackwardsCompatibility(Version version, String
pattern) {
+ super(version, pattern);
+ }
+
+ /** Provides all sorted versions to the test-framework */
+ @ParametersFactory(argumentFormatting = "Lucene-Version:%1$s; Pattern:
%2$s")
+ public static Iterable<Object[]> testVersionsFactory() throws
IllegalAccessException {
+ return allVersion(INDEX_NAME, SUFFIX);
+ }
+
+ protected Codec getCodec() {
+ return new Lucene99Codec() {
+ @Override
+ public KnnVectorsFormat getKnnVectorsFormatForField(String field) {
+ return new Lucene99HnswScalarQuantizedVectorsFormat(
+ Lucene99HnswVectorsFormat.DEFAULT_MAX_CONN,
+ Lucene99HnswVectorsFormat.DEFAULT_BEAM_WIDTH);
+ }
+ };
+ }
+
+ @Override
+ protected boolean supportsVersion(Version version) {
+ return version.onOrAfter(FIRST_INT8_HNSW_VERSION);
+ }
+
+ @Override
+ void verifyUsesDefaultCodec(Directory dir, String name) throws
IOException {
+ // We don't use the default codec
+ }
+
+ public void testInt8HnswIndexAndSearch() throws Exception {
+ IndexWriterConfig indexWriterConfig =
+ newIndexWriterConfig(new MockAnalyzer(random()))
+ .setOpenMode(IndexWriterConfig.OpenMode.APPEND)
+ .setCodec(getCodec())
+ .setMergePolicy(newLogMergePolicy());
+ try (IndexWriter writer = new IndexWriter(directory,
indexWriterConfig)) {
+ // add 10 docs
+ for (int i = 0; i < 10; i++) {
+ writer.addDocument(knnDocument(i + DOC_COUNT));
+ if (random().nextBoolean()) {
+ writer.flush();
+ }
+ }
+ if (random().nextBoolean()) {
+ writer.forceMerge(1);
+ }
+ writer.commit();
+ try (IndexReader reader = DirectoryReader.open(directory)) {
+ IndexSearcher searcher = new IndexSearcher(reader);
+ assertKNNSearch(searcher, KNN_VECTOR, 1000, DOC_COUNT + 10, "0");
+ assertKNNSearch(searcher, KNN_VECTOR, 10, 10, "0");
+ }
+ }
+ // This will confirm the docs are really sorted
+ TestUtil.checkIndex(directory);
+ }
+
+ @Override
+ protected void createIndex(Directory dir) throws IOException {
+ IndexWriterConfig conf =
+ new IndexWriterConfig(new MockAnalyzer(random()))
+ .setMaxBufferedDocs(10)
+ .setCodec(getCodec())
+ .setMergePolicy(NoMergePolicy.INSTANCE);
+ try (IndexWriter writer = new IndexWriter(dir, conf)) {
+ for (int i = 0; i < DOC_COUNT; i++) {
+ writer.addDocument(knnDocument(i));
+ }
+ writer.forceMerge(1);
+ }
+ try (DirectoryReader reader = DirectoryReader.open(dir)) {
+ IndexSearcher searcher = new IndexSearcher(reader);
+ assertKNNSearch(searcher, KNN_VECTOR, 1000, DOC_COUNT, "0");
+ assertKNNSearch(searcher, KNN_VECTOR, 10, 10, "0");
+ }
+ }
+
+ private static Document knnDocument(int id) {
+ Document doc = new Document();
+ float[] vector = {KNN_VECTOR[0], KNN_VECTOR[1], KNN_VECTOR[2] + 0.1f *
id};
+ doc.add(new KnnFloatVectorField(KNN_VECTOR_FIELD, vector,
KNN_VECTOR_FIELD_TYPE));
+ doc.add(new StringField("id", Integer.toString(id), Field.Store.YES));
+ return doc;
+ }
+
+ public void testReadOldIndices() throws Exception {
+ try (DirectoryReader reader = DirectoryReader.open(directory)) {
+ IndexSearcher searcher = new IndexSearcher(reader);
+ assertKNNSearch(searcher, KNN_VECTOR, 1000, DOC_COUNT, "0");
+ assertKNNSearch(searcher, KNN_VECTOR, 10, 10, "0");
+ }
+ }
+}
```
I also confirmed that the resulting index is indeed using HNSW scalar
compression.
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