[GitHub] nwangtw commented on a change in pull request #2891: Refactor StatefulStorage API

[GitBox <gi...@apache.org>]

nwangtw commented on a change in pull request #2891: Refactor StatefulStorage API
URL: https://github.com/apache/incubator-heron/pull/2891#discussion_r187482648
 
 

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 File path: heron/proto/ckptmgr.proto
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 @@ -195,6 +218,9 @@ message SaveInstanceStateRequest {
   // Information about the instance whose state this is
   required heron.proto.system.Instance instance = 1;
   required InstanceStateCheckpoint checkpoint = 2;
+  // Stmgrs need to send component metadata so that Checkpoint
+  // Mgrs know how to repartition if needed.
+  optional CheckpointComponentMetadata metadata = 3;
 
 Review comment:
   yeah. this info will be passed to ckptmgr, so that it knows if repartition is needed and how to repartition.

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