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[test] add random test case for manifest file full compaction #4326

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Oct 15, 2024
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[test] add random test case for manifest file full compaction #4326

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105 changes: 105 additions & 0 deletions paimon-core/src/test/java/org/apache/paimon/manifest/ManifestFileMetaTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -39,8 +39,10 @@
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
import java.util.UUID;
import java.util.concurrent.ThreadLocalRandom;
Expand Down Expand Up @@ -446,6 +448,109 @@ public void testIdentifierAfterFullCompaction() throws Exception {
containSameIdentifyEntryFile(fullCompacted, entryIdentifierExpected);
}

@RepeatedTest(100)
public void testRandomFullCompaction() throws Exception {
List<ManifestFileMeta> input = new ArrayList<>();
Set<FileEntry.Identifier> manifestEntrySet = new HashSet<>();
Set<FileEntry.Identifier> deleteManifestEntrySet = new HashSet<>();
int inputSize = ThreadLocalRandom.current().nextInt(100) + 1;
int totalEntryNums = 0;
for (int i = 0; i < inputSize; i++) {
int entryNums = ThreadLocalRandom.current().nextInt(100) + 1;
input.add(
generateRandomData(
entryNums, totalEntryNums, manifestEntrySet, deleteManifestEntrySet));
totalEntryNums += entryNums;
}
int suggerstSize = ThreadLocalRandom.current().nextInt(3000) + 1;
int sizeTrigger = ThreadLocalRandom.current().nextInt(40000) + 1;
List<ManifestFileMeta> newMetas = new ArrayList<>();
Optional<List<ManifestFileMeta>> fullCompacted =
ManifestFileMerger.tryFullCompaction(
input,
newMetas,
manifestFile,
suggerstSize,
sizeTrigger,
getPartitionType(),
null);

// *****verify result*****
List<ManifestFileMeta> mustMergedFiles =
input.stream()
.filter(
manifest ->
manifest.fileSize() < suggerstSize
|| manifest.numDeletedFiles() > 0)
.collect(Collectors.toList());
long mustMergeSize =
mustMergedFiles.stream().map(ManifestFileMeta::fileSize).reduce(0L, Long::sum);
// manifest files which were not written after full compaction
List<ManifestFileMeta> notMergedFiles =
input.stream()
.filter(
manifest ->
manifest.fileSize() >= suggerstSize
&& manifest.numDeletedFiles() == 0)
.filter(
manifest ->
manifestFile.read(manifest.fileName(), manifest.fileSize())
.stream()
.map(ManifestEntry::identifier)
.noneMatch(deleteManifestEntrySet::contains))
.collect(Collectors.toList());

if (mustMergeSize < sizeTrigger) {
assertThat(fullCompacted).isEmpty();
assertThat(newMetas).isEmpty();
} else if (mustMergedFiles.size() <= 1) {
assertThat(fullCompacted).isEmpty();
assertThat(newMetas).isEmpty();
} else {
assertThat(fullCompacted.get().size()).isEqualTo(notMergedFiles.size() + 1);
assertThat(newMetas).size().isEqualTo(1);
}
}

private ManifestFileMeta generateRandomData(
int entryNums,
int totalEntryNums,
Set<FileEntry.Identifier> manifestEntrySet,
Set<FileEntry.Identifier> deleteManifestEntrySet) {
List<ManifestEntry> entries = new ArrayList<>();
for (int i = 0; i < entryNums; i++) {
// 70% add, 30% delete
boolean isAdd = ThreadLocalRandom.current().nextInt(10) < 7;
if (manifestEntrySet.isEmpty() || isAdd) {
String fileName = String.format("file-%d", totalEntryNums + i);
Integer partition = ThreadLocalRandom.current().nextInt(10);
int level = ThreadLocalRandom.current().nextInt(6);
List<String> extraFiles = Lists.newArrayList(String.format("index-%s", fileName));
byte[] embeddedIndex = new byte[] {1, 2, 3};
entries.add(makeEntry(true, fileName, partition, level, extraFiles, embeddedIndex));
} else {
FileEntry.Identifier identifier =
manifestEntrySet.stream()
.skip(ThreadLocalRandom.current().nextInt(manifestEntrySet.size()))
.findFirst()
.get();
entries.add(
makeEntry(
false,
identifier.fileName,
identifier.partition.getInt(0),
identifier.level,
identifier.extraFiles,
new byte[] {1, 2, 3}));
manifestEntrySet.remove(identifier);
deleteManifestEntrySet.add(identifier);
}
}
manifestEntrySet.addAll(
entries.stream().map(ManifestEntry::identifier).collect(Collectors.toSet()));
return makeManifest(entries.toArray(new ManifestEntry[0]));
}

private void createData(
int numLastBits, List<ManifestFileMeta> input, List<ManifestFileMeta> expected) {
// suggested size 500 and suggested count 3
Expand Down
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