azagrebin commented on a change in pull request #6777: [FLINK-10461] [State
Backends, Checkpointing] Speed up download files when restore from DFS
URL: https://github.com/apache/flink/pull/6777#discussion_r242901812
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File path:
flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBStateBackend.java
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@@ -120,6 +120,9 @@
/** This determines if incremental checkpointing is enabled. */
private final TernaryBoolean enableIncrementalCheckpointing;
+ /** Thread number used to download from DFS when restore, default
value: 1. */
+ private int numberOfRestoringThreads;
Review comment:
We introduced a setter for it: `setNumberOfRestoringThreads`, not to explode
the number of constructor args like for `enableIncrementalCheckpointing`. At
the moment `RocksDBStateBackend` basically serves as a configuration object and
factory for the keyed and operator backends.
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