[
https://issues.apache.org/jira/browse/FLINK-8360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16347072#comment-16347072
]
ASF GitHub Bot commented on FLINK-8360:
---------------------------------------
Github user StefanRRichter commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r165102741
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/DefaultOperatorStateBackend.java
---
@@ -325,8 +325,7 @@ public OperatorStateHandle performOperation() throws
Exception {
return task;
}
- @Override
- public void restore(Collection<OperatorStateHandle> restoreSnapshots)
throws Exception {
+ public void restore(StateObjectCollection<OperatorStateHandle>
restoreSnapshots) throws Exception {
--- End diff --
Because there where a couple of static helper methods operating on those
collections, e.g. disposing a collection of state handles or checking if the
collection as a whole has any state. IMO those things should go to a separate
class and not be static helpers over a generic collection.
> Implement task-local state recovery
> -----------------------------------
>
> Key: FLINK-8360
> URL: https://issues.apache.org/jira/browse/FLINK-8360
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Fix For: 1.5.0
>
>
> This issue tracks the development of recovery from task-local state. The main
> idea is to have a secondary, local copy of the checkpointed state, while
> there is still a primary copy in DFS that we report to the checkpoint
> coordinator.
> Recovery can attempt to restore from the secondary local copy, if available,
> to save network bandwidth. This requires that the assignment from tasks to
> slots is as sticky is possible.
> For starters, we will implement this feature for all managed keyed states and
> can easily enhance it to all other state types (e.g. operator state) later.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
