August 2017
Beginner to intermediate
284 pages
6h 51m
English
Content preview from Mastering Apache Storm
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Hadoop Distributed File System
Commonly known as HDFS, the Hadoop Distributed File System is a scalable, distributed, fault-tolerant filesystem. HDFS acts as the storage layer of the Hadoop ecosystem. It allows the sharing and storage of data and application code among the various nodes in a Hadoop cluster.
The following are the key assumptions taken while designing HDFS:
- It should be deployable on a cluster of commodity hardware.
- Hardware failures are expected, and it should be tolerant to these.
- It should be scalable to thousands of nodes.
- It should be optimized for high throughput, even at the cost of latency.
- Most of the files will be large in size, so it should be optimized for big files.
- Storage is cheap, so use replication for reliability. ...
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