FUNDAMENTALS OF COMPUTER

DATABASE FUNDAMENTALS

BASICS OF BIG DATA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
WHERE HDFS IS NOT GOODFIT.
A
Low-latency data access
B
Lots of small files
C
Multiple writers, arbitrary file modifications
D
All the above
Explanation: 

Detailed explanation-1: -If we have multiple writers and arbitrary file modifications, HDFS will not a good fit. Files in HDFS are modified by a single writer at any time. Writes are always made at the end of the file, in the append-only fashion. There is no support for modifications at arbitrary offsets in the file.

Detailed explanation-2: -Disadvantage: Can not achieve low-latency data access. Not suitable for a large number of small file storage. File modification is not supported (HDFS 2.

Detailed explanation-3: -Hadoop does not provides a command interface to interact with HDFS. Explanation: The correct feature is Hadoop provides a command interface to interact with HDFS.

Detailed explanation-4: -Option C (prevent deletion of data) is not a goal of HDFS.

There is 1 question to complete.