BELUGA BEHR created HDFS-14293: ---------------------------------- Summary: Increase Default Size of dfs.stream-buffer-size Key: HDFS-14293 URL: https://issues.apache.org/jira/browse/HDFS-14293 Project: Hadoop HDFS Issue Type: Improvement Components: datanode Affects Versions: 3.2.0 Reporter: BELUGA BEHR
For many years (7+) now, the JDK has been using a default buffer size of [8192 bytes|https://github.com/openjdk-mirror/jdk7u-jdk/blob/master/src/share/classes/java/io/BufferedInputStream.java#L53]. Hadoop still defaults to a size half of that. The default is {{dfs.stream-buffer-size}} is 4096 bytes. https://hadoop.apache.org/docs/r2.8.0/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml Please increase default size to 8192. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org