??????????????



------------------ ???????? ------------------
??????: "Yun Tang"<[email protected]>;
????????: 2019??10??11??(??????) ????5:00
??????: "user-zh"<[email protected]>;

????: Re: ????????RocksDBStateBackend 
????state.backend.rocksdb.ttl.compaction.filter.enabled ??????????



Hi

??????????????????TTL????????????????????????????????????????????????????TTL????????????????????????????????????????????????????????????????rocksDB??????????????????????????????????????????????????????????????????????????????????????????????????????????????????
 ????????????(????????????????CPU, rocksDB 
????????ZTSD????Zlib)[1]??????compression type????????rocksdb 
ColumnFamilyOptions??setCompressionType ???? [2]

[1] https://github.com/facebook/rocksdb/wiki/Compression#configuration
[2] 
https://github.com/facebook/rocksdb/blob/bc8b05cb779a578b5f5acf8d9390af1d17e65ff5/java/src/main/java/org/rocksdb/ColumnFamilyOptions.java#L282

????
????

________________________________
From: claylin <[email protected]>
Sent: Friday, October 11, 2019 16:16
To: user-zh <[email protected]>
Subject: ????????RocksDBStateBackend 
????state.backend.rocksdb.ttl.compaction.filter.enabled ??????????

??????RocksDBStateBackend??,????????state??????????????????????(????),??????state.backend.rocksdb.ttl.compaction.filter.enabled????,????????rocksdb????????compact??????????????ttl????,??????????????state,https://github.com/facebook/rocksdb/wiki/Time-to-Live????????????,??????????????????,rocksdb????compact????,??????????????compact??,????????????????????state??????????????????flink????ttl????????????OnCreateAndWrite??OnReadAndWrite??????????????????????,????????,??????ttl??1??????????????????????,??????????????state??ttl????????????????????,??????????????????????????????????????????????????????????????????????????????????????????????????????

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