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https://issues.apache.org/jira/browse/FLINK-5823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220207#comment-16220207
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ASF GitHub Bot commented on FLINK-5823:
---------------------------------------
Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/4907#discussion_r147088825
--- Diff:
flink-core/src/main/java/org/apache/flink/configuration/CheckpointingOptions.java
---
@@ -0,0 +1,68 @@
+/*
+ * 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.flink.configuration;
+
+/**
+ * A collection of all configuration options that relate to checkpoints
+ * and savepoints.
+ */
+public class CheckpointingOptions {
+
+ //
------------------------------------------------------------------------
+ // general checkpoint and state backend options
+ //
------------------------------------------------------------------------
+
+ public static final ConfigOption<String> STATE_BACKEND = ConfigOptions
+ .key("state.backend")
+ .noDefaultValue();
+
+ /** The maximum number of completed checkpoint instances to retain.*/
+ public static final ConfigOption<Integer> MAX_RETAINED_CHECKPOINTS =
ConfigOptions
+ .key("state.checkpoints.num-retained")
+ .defaultValue(1);
+
+ //
------------------------------------------------------------------------
+ // Options specific to the file-system-based state backends
+ //
------------------------------------------------------------------------
+
+ /** The default directory for savepoints. Used by the state backends
that write
+ * savepoints to file systems (MemoryStateBackend, FsStateBackend,
RocksDBStateBackend). */
--- End diff --
Yes, the `MemoryStateBackend` actually works for HA and Savepoints. The
name is misleading...
> Store Checkpoint Root Metadata in StateBackend (not in HA custom store)
> -----------------------------------------------------------------------
>
> Key: FLINK-5823
> URL: https://issues.apache.org/jira/browse/FLINK-5823
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Blocker
> Fix For: 1.4.0
>
>
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