data node reads blocks sequentially from disk

Hello everyone I have a question regarding HDFS, data node code version 2.7.2. I have posted my question as Jira issue . I have observed that datanode issues sequential synchronous 64KB reads to local disk and add then send it to use

[jira] [Created] (HDFS-15206) HDFS synchronous reads from local file system

Mania Abdi created HDFS-15206: - Summary: HDFS synchronous reads from local file system Key: HDFS-15206 URL: https://issues.apache.org/jira/browse/HDFS-15206 Project: Hadoop HDFS Issue Type