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Which additional feature does HBase provide to HDFS?

You have data already stored in HDFS and are considering using HBase. Which additional feature
does HBase provide to HDFS?

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A.
Random writes

B.
Batch processing

C.
Fault tolerance

D.
Scalability

Explanation:
HBase adds random read/write access to HDFS.
Note:
Hadoop is scalable, but…
* MapReduce is slow and difcult
* Does not support random writes
* Poor support for random reads
Reference:http://borthakur.com/ftp/SIGMODRealtimeHadoopPresentation.pdf(11th slide)

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