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https://issues.apache.org/jira/browse/FLINK-8360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16348467#comment-16348467
]
ASF GitHub Bot commented on FLINK-8360:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r165332129
--- Diff:
flink-core/src/main/java/org/apache/flink/configuration/ConfigConstants.java ---
@@ -316,6 +316,11 @@
*/
public static final String TASK_MANAGER_REFUSED_REGISTRATION_PAUSE =
"taskmanager.refused-registration-pause";
+ /**
+ * The config parameter defining the root directories for storing
file-based state for local recovery.
+ */
+ public static final String TASK_MANAGER_LOCAL_STATE_ROOT_DIR_KEY =
"taskmanager.local-state-root.dir";
--- End diff --
Using `ConfigConstants` is discouraged. Please introduce a `ConfigOption`
if not already done in a later commit.
> 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.
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