What is the difference between a regular file system and HDFS?

Question

What are the key differences between a normal file system and HDFS (Hadoop distributed file system)?

Answer 1

There are certain key differences between normal file systems and HDFS (Hadoop distributed file system):

• Normal file systems have small block size of data. (Around 512 bytes) while HDFS has larger block sizes at around 64 MB)
• Multiple disks seek for larger files in normal file systems while in HDFS, data is read sequentially after every individual seek.