Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/4907#discussion_r147088900
--- 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). */
+ public static final ConfigOption<String> SAVEPOINT_DIRECTORY =
ConfigOptions
+ .key("state.savepoints.dir")
+ .noDefaultValue()
+ .withDeprecatedKeys("savepoints.state.backend.fs.dir");
+
+ /** The default directory used for checkpoints. Used by the state
backends that write
+ * checkpoints to file systems (MemoryStateBackend, FsStateBackend,
RocksDBStateBackend). */
+ public static final ConfigOption<String> CHECKPOINTS_DIRECTORY =
ConfigOptions
+ .key("state.checkpoints.dir")
+ .noDefaultValue();
+
+ /** Option whether the heap-based key/value data structures should use
an asynchronous
+ * snapshot method. Used by MemoryStateBackend and FsStateBackend. */
+ public static final ConfigOption<Boolean> HEAP_KV_ASYNC_SNAPSHOTS =
ConfigOptions
+ .key("state.backend.heap.async")
--- End diff --
+1 to fix the names, separate effort though
---
