beliefer commented on code in PR #44172:
URL: https://github.com/apache/spark/pull/44172#discussion_r1415430138
##########
core/src/main/scala/org/apache/spark/io/CompressionCodec.scala:
##########
@@ -233,18 +233,22 @@ class ZStdCompressionCodec(conf: SparkConf) extends
CompressionCodec {
NoPool.INSTANCE
}
+ private val workers = conf.get(IO_COMPRESSION_ZSTD_WORKERS)
+
override def compressedOutputStream(s: OutputStream): OutputStream = {
// Wrap the zstd output stream in a buffered output stream, so that we can
// avoid overhead excessive of JNI call while trying to compress small
amount of data.
- val os = new ZstdOutputStreamNoFinalizer(s, bufferPool).setLevel(level)
+ val os = new ZstdOutputStreamNoFinalizer(s,
bufferPool).setLevel(level).setWorkers(workers)
Review Comment:
Late LGTM.
How much is the default worker num if not specify the worker num?
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