May 2017
Intermediate to advanced
348 pages
7h 8m
English
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Configure HDFS cache
In Hadoop, centralized cache management is an explicit mechanism for caching the most frequently used files. Users can configure the path to be cached by HDFS, which prevents them from being evicted from memory. Namenode is responsible for coordinating all the Datanode caches in the cluster and periodically receives a cache report.
Getting ready
For this recipe, you will again need a running cluster with at least the HDFS daemons running in the cluster.
How to do it...
- Connect to the
master1.cyrus.commaster node and switch to userhadoop. - The first step is to define a cache pool, which is a collection of cache directives. Refer to the following command and screenshot:
$ hdfs cacheadmin -addPool sales - Then, we need to define a ...
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