mayuehappy commented on code in PR #24072:
URL: https://github.com/apache/flink/pull/24072#discussion_r1450153620


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flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBConfigurableOptions.java:
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@@ -139,6 +149,25 @@ public class RocksDBConfigurableOptions implements 
Serializable {
                                     NONE.name(),
                                     LEVEL.name()));
 
+    public static final ConfigOption<CompressionType> COMPRESSION_TYPE =

Review Comment:
   Introduce CompressionPerLevel  requires passing in a CompressType List for 
each level.
   I idea is to introduce a config like 
   `ConfigOption<List<CompressType>> CompressionPerLevel `
   But I'm worried about whether the cost to users is too high. After all, many 
flink users may not understand rocksdb or even lsm.
   Do you have any suggestions ? 



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