Database Reference
In-Depth Information
The read/write operational flow in HDFS
To get a better understanding of HDFS, we need to understand the flow of operations for
the following two scenarios:
• A file is written to HDFS
• A file is read from HDFS
HDFS uses a single-write, multiple-read model, where the files are written once and read
several times. The data cannot be altered once written. However, data can be appended to
the file by reopening it. All files in the HDFS are saved as data blocks.
