viirya commented on a change in pull request #30162:
URL: https://github.com/apache/spark/pull/30162#discussion_r513835420
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -1324,6 +1324,16 @@ object SQLConf {
.intConf
.createWithDefault(2)
+ val STATE_STORE_COMPRESSION_CODEC =
+ buildConf("spark.sql.streaming.stateStore.compression.codec")
+ .internal()
+ .doc("The codec used to compress delta and snapshot files generated by
StateStore. " +
+ "By default, Spark provides four codecs: lz4, lzf, snappy, and zstd.
You can also " +
+ "use fully qualified class names to specify the codec. Default codec
is lz4.")
Review comment:
For invalid codec name, `CompressionCodec.createCodec` will throw an
`IllegalArgumentException`.
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