Alternatives to DAS in Hadoop storage - Hadoop Training in chennai

Alternatives to DAS in Hadoop storage

We concluded the last article in this series on managing "big data" with a question: DoesHadoop storage have to be direct-attached storage (DAS)? This article introduces some alternatives to the strict use of embedded DAS for hardware-based storage within theHadoop MapReduce framework.

Direct-attached storage (DAS) is computer storage that is directly attached to one computer or server and is not, without special support, directly accessible to other ones. The main alternatives to direct-attached storage are network-attached storage (NAS) and the storage area network (SAN).

For an individual computer user, the hard drive is the usual form of direct-attached storage. In an enterprise, providing for storage that can be shared by multiple computers and their users tends to be more efficient and easier to manage.

To do so, we'll examine the alternatives in terms of a three-stage model:

Stage one: DAS in the form of small amounts of disk (JBOD/RAID) embedded within each cluster node is replaced with larger, high-performance arrays that are external to the cluster nodes that are still directly attached to provide data locality. In a way, we’re rephrasing our original question:

Does Hadoop data storage have to be relatively small groupings of DASembedded within each cluster node? No, but the larger external storage arrays that replace embedded DAS still function as DAS.

Stage two: The node-based DAS layer used as primary storage by the cluster is augmented with the addition of a second storage layer consisting of network-attached storage (NAS) or a storage-area network (SAN).

Stage three: The node-based DAS layer used as primary storage is replaced by a networked storage layer consisting of NAS or a SAN.

Learn Big Data from Big Data Solutions Architects! Hadoop Training Chennai with Hands-On Practical 

 BigDataTraining.IN - India's Leading BigData Consulting & Training Provider

BigDataTraining.IN is a leading Global Talent Development Corporation, building skilled manpower pool for global industry requirements. BigData Training.in has today grown to be amongst world's leading talent development companies offering learning solutions to Individuals, Institutions & Corporate Clients.

BigDataTraining.IN is the only software institute which offers in-depth classroom & online training in different Cutting   

Hadoop Training  Conducted by Big Data Experts 

http://www.bigdatatraining.in/hadoop-development/training-schedule/

Classroom / Online / Corporate Training

 get connected with BigDataTraining.IN

http://www.hadooptrainingchennai.in/

http://www.hadooptrainingchennai.in/courses/

http://www.hadooptrainingchennai.in/hadoop-training/

http://www.hadooptrainingchennai.in/course-content/

Contact us:
Mail: info@bigdatatraining.in
Call: +91 97899 68765 / 044 – 42645495
Visit us: #67,2nd Floor, 1st Main Road, Gandhi Nagar, Adyar, Chennai- 600020