swamirishi commented on code in PR #7200:
URL: https://github.com/apache/ozone/pull/7200#discussion_r1767610927
##########
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/service/SnapshotDeletingService.java:
##########
@@ -136,316 +157,90 @@ public BackgroundTaskResult call() throws
InterruptedException {
getRunCount().incrementAndGet();
- ReferenceCounted<OmSnapshot> rcOmSnapshot = null;
- ReferenceCounted<OmSnapshot> rcOmPreviousSnapshot = null;
-
- Table<String, SnapshotInfo> snapshotInfoTable =
- ozoneManager.getMetadataManager().getSnapshotInfoTable();
- List<String> purgeSnapshotKeys = new ArrayList<>();
- try (TableIterator<String, ? extends Table.KeyValue
- <String, SnapshotInfo>> iterator = snapshotInfoTable.iterator()) {
-
+ try {
+ int remaining = keyLimitPerTask;
+ Iterator<UUID> iterator = chainManager.iterator(true);
+ List<String> snapshotsToBePurged = new ArrayList<>();
long snapshotLimit = snapshotDeletionPerTask;
-
while (iterator.hasNext() && snapshotLimit > 0) {
- SnapshotInfo snapInfo = iterator.next().getValue();
-
- // Only Iterate in deleted snapshot
+ SnapshotInfo snapInfo = SnapshotUtils.getSnapshotInfo(ozoneManager,
chainManager, iterator.next());
if (shouldIgnoreSnapshot(snapInfo)) {
continue;
}
-
- // Note: Can refactor this to use try-with-resources.
- // Handling RC decrements manually for now to minimize conflicts.
- rcOmSnapshot = omSnapshotManager.getSnapshot(
- snapInfo.getVolumeName(),
- snapInfo.getBucketName(),
- snapInfo.getName());
- OmSnapshot omSnapshot = rcOmSnapshot.get();
-
- Table<String, RepeatedOmKeyInfo> snapshotDeletedTable =
- omSnapshot.getMetadataManager().getDeletedTable();
- Table<String, OmKeyInfo> snapshotDeletedDirTable =
- omSnapshot.getMetadataManager().getDeletedDirTable();
-
- Table<String, String> renamedTable =
- omSnapshot.getMetadataManager().getSnapshotRenamedTable();
-
- long volumeId = ozoneManager.getMetadataManager()
- .getVolumeId(snapInfo.getVolumeName());
- // Get bucketInfo for the snapshot bucket to get bucket layout.
- String dbBucketKey = ozoneManager.getMetadataManager().getBucketKey(
- snapInfo.getVolumeName(), snapInfo.getBucketName());
- OmBucketInfo bucketInfo = ozoneManager.getMetadataManager()
- .getBucketTable().get(dbBucketKey);
-
- if (bucketInfo == null) {
- // Decrement ref count
- rcOmSnapshot.close();
- rcOmSnapshot = null;
- throw new IllegalStateException("Bucket " + "/" +
- snapInfo.getVolumeName() + "/" + snapInfo.getBucketName() +
- " is not found. BucketInfo should not be null for snapshotted"
+
- " bucket. The OM is in unexpected state.");
- }
-
- String snapshotBucketKey = dbBucketKey + OzoneConsts.OM_KEY_PREFIX;
- String dbBucketKeyForDir = ozoneManager.getMetadataManager()
- .getBucketKey(Long.toString(volumeId),
- Long.toString(bucketInfo.getObjectID())) + OM_KEY_PREFIX;
-
- if (isSnapshotReclaimable(snapshotDeletedTable,
- snapshotDeletedDirTable, snapshotBucketKey, dbBucketKeyForDir)) {
- purgeSnapshotKeys.add(snapInfo.getTableKey());
- // Decrement ref count
- rcOmSnapshot.close();
- rcOmSnapshot = null;
+ LOG.info("Started Snapshot Deletion Processing for snapshot : {}",
snapInfo.getTableKey());
+ SnapshotInfo nextSnapshot =
SnapshotUtils.getNextSnapshot(ozoneManager, chainManager, snapInfo);
+ // Continue if the next snapshot is not active. This is to avoid
unnecessary copies from one snapshot to
+ // another.
+ if (nextSnapshot != null &&
+ nextSnapshot.getSnapshotStatus() !=
SnapshotInfo.SnapshotStatus.SNAPSHOT_ACTIVE) {
continue;
}
- //TODO: [SNAPSHOT] Add lock to deletedTable and Active DB.
- SnapshotInfo previousSnapshot = getPreviousActiveSnapshot(snapInfo,
chainManager);
- Table<String, OmKeyInfo> previousKeyTable = null;
- Table<String, OmDirectoryInfo> previousDirTable = null;
- OmSnapshot omPreviousSnapshot = null;
-
- // Split RepeatedOmKeyInfo and update current snapshot
deletedKeyTable
- // and next snapshot deletedKeyTable.
- if (previousSnapshot != null) {
- rcOmPreviousSnapshot = omSnapshotManager.getSnapshot(
- previousSnapshot.getVolumeName(),
- previousSnapshot.getBucketName(),
- previousSnapshot.getName());
- omPreviousSnapshot = rcOmPreviousSnapshot.get();
-
- previousKeyTable = omPreviousSnapshot
-
.getMetadataManager().getKeyTable(bucketInfo.getBucketLayout());
- previousDirTable = omPreviousSnapshot
- .getMetadataManager().getDirectoryTable();
+ // nextSnapshot = null means entries would be moved to AOS, hence
ensure that KeyDeletingService &
+ // DirectoryDeletingService is not running while the entries are
moving.
+ if (nextSnapshot == null) {
+ waitForKeyDeletingService();
Review Comment:
done
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