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https://issues.apache.org/jira/browse/FLINK-11138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16719713#comment-16719713
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Yun Tang commented on FLINK-11138:
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Yes, you are right. But we already disable the WAL of rocksDB. You could view
configuration
[here|https://github.com/apache/flink/blob/967b31b333e6f4b014ea3041f420bfaff2484618/flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBKeyedStateBackend.java#L327].
> RocksDB's wal seems to be useless in rocksdb-state-backend that reduce the
> disk's overhead
> ------------------------------------------------------------------------------------------
>
> Key: FLINK-11138
> URL: https://issues.apache.org/jira/browse/FLINK-11138
> Project: Flink
> Issue Type: Improvement
> Reporter: cailiuyang
> Priority: Major
>
> The wal of rocksdb is used to recovery after crash, but after flink-job
> crash, it always recovery from last checkpoint, so it seems wal is useless.
> Am i right?
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