SaketaChalamchala commented on code in PR #8214:
URL: https://github.com/apache/ozone/pull/8214#discussion_r2085183556
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hadoop-hdds/rocksdb-checkpoint-differ/src/main/java/org/apache/ozone/rocksdiff/RocksDBCheckpointDiffer.java:
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@@ -1200,6 +1249,109 @@ public void pruneSstFiles() {
}
}
+ /**
+ * Defines the task that removes OMKeyInfo from SST files from backup
directory to
+ * save disk space.
+ */
+ public void pruneSstFileValues() {
+ if (!shouldRun()) {
+ return;
+ }
+
+ Path sstBackupDirPath = Paths.get(sstBackupDir);
+ Path prunedSSTFilePath = sstBackupDirPath.resolve(PRUNED_SST_FILE_TEMP);
+ try (ManagedOptions managedOptions = new ManagedOptions();
+ ManagedEnvOptions envOptions = new ManagedEnvOptions();
+ ManagedSstFileWriter sstFileWriter = new
ManagedSstFileWriter(envOptions, managedOptions)) {
+ byte[] compactionLogEntryKey;
+ int batchCounter = 0;
+ while ((compactionLogEntryKey = pruneQueue.peek()) != null &&
++batchCounter <= pruneSSTFileBatchSize) {
+ CompactionLogEntry compactionLogEntry;
+ synchronized (this) {
+ try {
+ compactionLogEntry =
CompactionLogEntry.getCodec().fromPersistedFormat(
+ activeRocksDB.get().get(compactionLogTableCFHandle,
compactionLogEntryKey));
+ } catch (RocksDBException ex) {
+ throw new RocksDatabaseException("Failed to get compaction log
entry.", ex);
+ }
+
+ boolean shouldUpdateTable = false;
+ List<CompactionFileInfo> fileInfoList =
compactionLogEntry.getInputFileInfoList();
+ List<CompactionFileInfo> updatedFileInfoList = new ArrayList<>();
+ for (CompactionFileInfo fileInfo : fileInfoList) {
+ if (fileInfo.isPruned()) {
+ updatedFileInfoList.add(fileInfo);
+ continue;
+ }
+ Path sstFilePath = sstBackupDirPath.resolve(fileInfo.getFileName()
+ ROCKSDB_SST_SUFFIX);
+ if (Files.notExists(sstFilePath)) {
+ LOG.debug("Skipping pruning SST file {} as it does not exist in
backup directory.", sstFilePath);
+ updatedFileInfoList.add(fileInfo);
+ continue;
+ }
+
+ // Write the file.sst => pruned.sst.tmp
+ Files.deleteIfExists(prunedSSTFilePath);
+ try (ManagedRawSSTFileReader<Pair<byte[], Integer>> sstFileReader
= new ManagedRawSSTFileReader<>(
+ managedOptions, sstFilePath.toFile().getAbsolutePath(),
SST_READ_AHEAD_SIZE);
+ ManagedRawSSTFileIterator<Pair<byte[], Integer>> itr =
sstFileReader.newIterator(
+ keyValue -> Pair.of(keyValue.getKey(),
keyValue.getType()), null, null)) {
+ sstFileWriter.open(prunedSSTFilePath.toFile().getAbsolutePath());
+ while (itr.hasNext()) {
+ Pair<byte[], Integer> keyValue = itr.next();
+ if (keyValue.getValue() == 0) {
+ sstFileWriter.delete(keyValue.getKey());
+ } else {
+ sstFileWriter.put(keyValue.getKey(), new byte[0]);
Review Comment:
You're right. I can use
`org.apache.commons.lang3.ArrayUtils.EMPTY_BYTE_ARRAY` here.
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