Скачать или смотреть Rack Awareness in Hadoop

The rack is a physical collection of nodes in our Hadoop cluster (maybe 30 to 40).

A large Hadoop cluster is consists of many Racks.

With the help of this Racks information, Namenode chooses the closest Datanode to achieve maximum performance while performing the read/write information which reduces the Network Traffic.

The name node has the feature of finding the closest data node for faster performance for that Name node holds the ids of all the Racks present in the Hadoop cluster.

This concept of choosing the closest data node for serving a purpose is Rack Awareness.

In this video I have discussed about this very important concept in Hadoop Cluster


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