Github user mridulm commented on a diff in the pull request: https://github.com/apache/spark/pull/17024#discussion_r102420200 --- Diff: core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala --- @@ -169,14 +174,24 @@ private[spark] object ReliableCheckpointRDD extends Logging { val bufferSize = env.conf.getInt("spark.buffer.size", 65536) val fileOutputStream = if (blockSize < 0) { - fs.create(tempOutputPath, false, bufferSize) + val checkpointCodec = env.conf.get("spark.checkpoint.compress.codec", "none") + val fileStream = fs.create(tempOutputPath, false, bufferSize) + if (CompressionCodec.ALL_COMPRESSION_CODECS_SHORT.contains(checkpointCodec)) { + val compressionCodec = CompressionCodec.createCodec(env.conf, checkpointCodec) + logInfo(s"Compressing using $checkpointCodec.") + compressionCodec.compressedOutputStream(fileStream) + } else { + fileStream + } } else { // This is mainly for testing purpose fs.create(tempOutputPath, false, bufferSize, fs.getDefaultReplication(fs.getWorkingDirectory), blockSize) } val serializer = env.serializer.newInstance() val serializeStream = serializer.serializeStream(fileOutputStream) + logInfo(s"Starting to write to checkpoint file $tempOutputPath.") --- End diff -- This will make the logs verbose. If it does help with debugging, you could make it logTrace - or remove it entirely.
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