DATABASE FUNDAMENTALS
BASICS OF BIG DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Apple
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Twitter
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Facebook
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None of the above
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Detailed explanation-1: -Explanation : Facebook has many Hadoop clusters, the largest among them is the one that is used for Data warehousing.
Detailed explanation-2: -1 Answer. Facebook has the world’s largest Hadoop Cluster. Facebook is using Hadoop for data warehousing and they are having the largest Hadoop storage cluster in the world. Some of the properties of the HDFS cluster of Facebook is: HDFS cluster of 21 PB storage capacity.
Detailed explanation-3: -A Hadoop cluster is a collection of computers, known as nodes, that are networked together to perform these kinds of parallel computations on big data sets.
Detailed explanation-4: -The default Hadoop configuration uses 64 MB blocks, while we suggest using 128 MB in your configuration for a medium data context as well and 256 MB for a very large data context. This means that a mapper task can process one data block (for example, 128 MB) by only opening one block.
Detailed explanation-5: -With 300+ million users browsing more than 350 million products listed on their website, eBay has one of the largest Hadoop clusters in the industry that run prominelty on MapReduce Jobs. Hadoop is used at eBay for Search Optimization and Research. Client projects in finance, telecom and retail.