Xiaogang Shi created FLINK-6034: ----------------------------------- Summary: Add KeyedStateHandle for the snapshots in keyed streams Key: FLINK-6034 URL: https://issues.apache.org/jira/browse/FLINK-6034 Project: Flink Issue Type: Sub-task Reporter: Xiaogang Shi Assignee: Xiaogang Shi
Currently, the only type of the snapshots in keyed streams is {{KeyGroupsStateHandle}} which is full and store the states one group after another. With the introduction of incremental checkpointing, we need a higher level abstraction of keyed snapshots to allow flexible snapshot formats. The implementation of {{KeyedStateHandle}}s may vary a lot in different backends. The only information needed in {{KeyedStateHandle}}s is their key group range. When recovering the job with a different degree of parallelism, {{KeyedStateHandle}}s will be assigned to those subtasks whose key group ranges overlap with their ranges. -- This message was sent by Atlassian JIRA (v6.3.15#6346)