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https://issues.apache.org/jira/browse/FLINK-4844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582788#comment-15582788
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ASF GitHub Bot commented on FLINK-4844:
---------------------------------------

Github user aljoscha commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2648#discussion_r83678862
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/state/ManagedSnapshotContext.java
 ---
    @@ -0,0 +1,41 @@
    +/*
    + * 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.runtime.state;
    +
    +import org.apache.flink.annotation.PublicEvolving;
    +
    +/**
    + * This interface provides a context in which operators that use managed 
state (i.e. state that is managed by state
    + * backends) can perform a snapshot. As snapshots of the backends 
themselves are taken by the system, this interface
    + * mainly provides meta information about the checkpoint.
    + */
    +@PublicEvolving
    +public interface ManagedSnapshotContext {
    --- End diff --
    
    Same comments as for `ManagedInitializationContext` hold here.


> Partitionable Raw Keyed/Operator State
> --------------------------------------
>
>                 Key: FLINK-4844
>                 URL: https://issues.apache.org/jira/browse/FLINK-4844
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: Stefan Richter
>            Assignee: Stefan Richter
>
> Partitionable operator and keyed state are currently only available by using 
> backends. However, the serialization code for many operators is build around 
> reading/writing their state to a stream for checkpointing. We want to provide 
> partitionable states also through streams, so that migrating existing 
> operators becomes more easy.



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