COMPUTER SCIENCE AND ENGINEERING
CLOUD COMPUTING
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Hadoop Strdata
|
|
|
Hadoop Streaming
|
|
|
Hadoop Stream
|
|
|
None of the mentioned
|
Detailed explanation-1: -Hadoop Streaming is a utility which allows users to create and run jobs with any executables (e.g. shell utilities) as the mapper and/or the reducer.
Detailed explanation-2: -Hadoop Streaming is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g. Unix shell utilities) as the mapper and/or the reducer.
Detailed explanation-3: -Let us now see how Hadoop Streaming works. The mapper and the reducer (in the above example) are the scripts that read the input line-by-line from stdin and emit the output to stdout. The utility creates a Map/Reduce job and submits the job to an appropriate cluster and monitor the job progress until its completion.
Detailed explanation-4: -Job − A program is an execution of a Mapper and Reducer across a dataset. Task − An execution of a Mapper or a Reducer on a slice of data.
Detailed explanation-5: -Mappers and Reducers are the Hadoop servers that run the Map and Reduce functions respectively. It doesn’t matter if these are the same or different servers.