eolivelli commented on a change in pull request #642: BP-14 part 1 - metadata 
and protocol changes
URL: https://github.com/apache/bookkeeper/pull/642#discussion_r146520915
 
 

 ##########
 File path: 
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/api/LedgerType.java
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 @@ -0,0 +1,46 @@
+/**
+ *
+ * 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.bookkeeper.client.api;
+
+/**
+ * Describes the type of ledger.
+ * LedgerTypes describes the behaviour of the ledger in respect to durability 
and provides
+ * hints to the storage of data on Bookies
+ *
+ * @since 4.6
+ */
+public enum LedgerType {
+    /**
+     * Persistent Durability, using Journal.<br>
+     * Each entry is persisted to the journal and every writes receives and 
acknowledgement only with the guarantee that
+     * it has been persisted durabily to it (data is fsync'd to the disk)
+     */
+    PD_JOURNAL,
 
 Review comment:
   If we rename 'sync' to force, for the LedgerType @sijie  @ivankelly what is 
your idea ?
   FSYNC_REQUIRED_ON_JOURNAL vs FORCE_REQUIRED_ON_JOURNAL vs 
AUTOMATIC_FORCE_ON_JOURNAL
   and
   FSYNC_DEFERRED_ON_JOURNAL vs FORCE_DEFERRED_ON_JOURNAL vs 
EXPLICIT_FORCE_ON_JOURNAL
   
   and SKIP_JOURNAL (@jvrao)

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