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https://issues.apache.org/jira/browse/FLINK-4340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15414591#comment-15414591
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ASF GitHub Bot commented on FLINK-4340:
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Github user wenlong88 commented on the issue:
https://github.com/apache/flink/pull/2345
@StephanEwen
http://rocksdb.org/blog/2609/use-checkpoints-for-efficient-snapshots/
since sst files is immutable once created, in when doing checkpoint,
rocksdb creates hard link for all live sst files to a given directory and copy
manifest to the directory, it cost little IO and the checkpoint dir can be used
as data dir to restore
> Remove RocksDB Semi-Async Checkpoint Mode
> -----------------------------------------
>
> Key: FLINK-4340
> URL: https://issues.apache.org/jira/browse/FLINK-4340
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Affects Versions: 1.1.0
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> This seems to be causing to many problems and is also incompatible with the
> upcoming key-group/sharding changes that will allow rescaling of keyed state.
> Once this is done we can also close FLINK-4228.
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