Q1. Perform following tasks on Big data platform such as Hadoop:
1. Run Map and Reduce codes
2. Data storage and retrieval operations
3. Batch processing operations
Answers
Answer:
1) Task − An execution of a Mapper or a Reducer on a slice of data. Task Attempt − A particular instance of an attempt to execute a task on a SlaveNode.
2) Due to its specific nature of Big Data, it is stored in distributed file system ... Analyzing Big Data is a challenging task as it involves large ... traditional data analysis and management tools. A ... Database analytics platforms such as Map Reduce, in- ... then performs reduce operations on the groups of output data.
3) Secondly, reduce task, which takes the output from a map as an input and ... of the name MapReduce implies, the reduce task is always performed after the map job. The major advantage of MapReduce is that it is easy to scale data processing ... The framework manages all the details of data-passing such as issuing tasks.
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