Why is replication done in HDFS?

Related questions

1. What do you know about block and block in HDFS?
2. How do I change the block size in HDFS?
3. What is Hdfs safe mode?
4. How does HDFS and MapReduce work?
5. What is the difference between NameNode and DataNode in Hadoop?
6. What are the most common input formats in Hadoop?
7. Why Hadoop has default replication factor 3?
8. Why is a block in HDFS so large?
9. What is the difference between a name node and a DataNode in HDFS?
10. How do I start NameNode and DataNode in Hadoop?

Tags

1. #hadoop
2. #crashes
3. #block
4. #because
5. #increases
6. #another
7. #system
8. #replication
9. #point
10. #distributed
11. #containing
12. #processing
13. #which
14. #availability