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[HUDI-3069] Improve HoodieMergedLogRecordScanner avoid putting unnecessary hoodie records (#4932)

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* log scanner optimization
* payload equals switches to `=`

Co-authored-by: 苏承祥 <sucx@tuya.com>
This commit is contained in:
苏承祥
2022-03-07 14:35:55 +08:00
committed by GitHub
parent c9ffdc493e
commit 6f57bbfac4
1 changed files with 8 additions and 9 deletions
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17
hudi-common/src/main/java/org/apache/hudi/common/table/log/HoodieMergedLogRecordScanner.java
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@@ -59,18 +59,15 @@ public class HoodieMergedLogRecordScanner extends AbstractHoodieLogRecordReader
implements Iterable<HoodieRecord<? extends HoodieRecordPayload>> { implements Iterable<HoodieRecord<? extends HoodieRecordPayload>> {
private static final Logger LOG = LogManager.getLogger(HoodieMergedLogRecordScanner.class); private static final Logger LOG = LogManager.getLogger(HoodieMergedLogRecordScanner.class);
// A timer for calculating elapsed time in millis
public final HoodieTimer timer = new HoodieTimer();
// Final map of compacted/merged records // Final map of compacted/merged records
protected final ExternalSpillableMap<String, HoodieRecord<? extends HoodieRecordPayload>> records; protected final ExternalSpillableMap<String, HoodieRecord<? extends HoodieRecordPayload>> records;
// count of merged records in log // count of merged records in log
private long numMergedRecordsInLog; private long numMergedRecordsInLog;
private long maxMemorySizeInBytes; private long maxMemorySizeInBytes;
// Stores the total time taken to perform reading and merging of log blocks // Stores the total time taken to perform reading and merging of log blocks
private long totalTimeTakenToReadAndMergeBlocks; private long totalTimeTakenToReadAndMergeBlocks;
// A timer for calculating elapsed time in millis
public final HoodieTimer timer = new HoodieTimer();
@SuppressWarnings("unchecked") @SuppressWarnings("unchecked")
protected HoodieMergedLogRecordScanner(FileSystem fs, String basePath, List<String> logFilePaths, Schema readerSchema, protected HoodieMergedLogRecordScanner(FileSystem fs, String basePath, List<String> logFilePaths, Schema readerSchema,
@@ -143,9 +140,11 @@ public class HoodieMergedLogRecordScanner extends AbstractHoodieLogRecordReader
HoodieRecord<? extends HoodieRecordPayload> oldRecord = records.get(key); HoodieRecord<? extends HoodieRecordPayload> oldRecord = records.get(key);
HoodieRecordPayload oldValue = oldRecord.getData(); HoodieRecordPayload oldValue = oldRecord.getData();
HoodieRecordPayload combinedValue = hoodieRecord.getData().preCombine(oldValue); HoodieRecordPayload combinedValue = hoodieRecord.getData().preCombine(oldValue);
boolean choosePrev = combinedValue.equals(oldValue); // If combinedValue is oldValue, no need rePut oldRecord
HoodieOperation operation = choosePrev ? oldRecord.getOperation() : hoodieRecord.getOperation(); if (combinedValue != oldValue) {
records.put(key, new HoodieAvroRecord<>(new HoodieKey(key, hoodieRecord.getPartitionPath()), combinedValue, operation)); HoodieOperation operation = hoodieRecord.getOperation();
records.put(key, new HoodieAvroRecord<>(new HoodieKey(key, hoodieRecord.getPartitionPath()), combinedValue, operation));
}
} else { } else {
// Put the record as is // Put the record as is
records.put(key, hoodieRecord); records.put(key, hoodieRecord);
@@ -187,11 +186,11 @@ public class HoodieMergedLogRecordScanner extends AbstractHoodieLogRecordReader
protected boolean isBitCaskDiskMapCompressionEnabled = HoodieCommonConfig.DISK_MAP_BITCASK_COMPRESSION_ENABLED.defaultValue(); protected boolean isBitCaskDiskMapCompressionEnabled = HoodieCommonConfig.DISK_MAP_BITCASK_COMPRESSION_ENABLED.defaultValue();
// incremental filtering // incremental filtering
protected Option<InstantRange> instantRange = Option.empty(); protected Option<InstantRange> instantRange = Option.empty();
protected String partitionName;
// auto scan default true // auto scan default true
private boolean autoScan = true; private boolean autoScan = true;
// operation field default false // operation field default false
private boolean withOperationField = false; private boolean withOperationField = false;
protected String partitionName;
@Override @Override
public Builder withFileSystem(FileSystem fs) { public Builder withFileSystem(FileSystem fs) {