In the previous few recipes, we tuned the operating system, disks, and network setting for the installation of Hadoop.
In this recipe, we will tune HDFS for best performance. As stated initially, the HDFS read/write performance on a node with a slow disk and resource constraints will be slower compared to a node having a faster disk, CPU, and RAM. Tuning is always a layered approach, tuning each layer in conjunction to come to a final result.
To complete the recipe, the user must have a running cluster with HDFS and YARN setup. Users can refer to Chapter 1, Hadoop Architecture and Deployment, on installation details.
The assumption here is that the user is well familiar with HDFS concepts and knows its layout. Please read ...