Why is HDFS only suitable for large data sets and not the correct tool to use for many small files?

55

What are file permissions in HDFS? how does HDFS check permissions for files/directory?

49

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

36

Explain how HDFS communicates with Linux native file system?

36

What are tools available to send the streaming data to hdfs?

33

Replication causes data redundancy then why is pursued in hdfs?

45

How to copy a file into HDFS with a different block size to that of existing block size configuration?

32

Will various customers write into an hdfs record simultaneously?

40

Define data integrity? How does hdfs ensure data integrity of data blocks stored in hdfs?

52

How to Delete directory and files recursively from HDFS?

89

What do you mean by the high availability of a namenode? How is it achieved?

33

Why do we need hdfs?

50

How to split single hdfs block into partitions rdd?

44

Replication causes data redundancy then why is is pursued in HDFS?

46

What is secondary namenode?

50