What Does Hadoop Distributed File System (HDFS) Mean?
The Hadoop Distributed File System (HDFS) is a distributed file system that runs on standard or low-end hardware. Developed by Apache Hadoop, HDFS works like a standard distributed file system but provides better data throughput and access through the MapReduce algorithm, high fault tolerance and native support of large data sets.
Techopedia Explains Hadoop Distributed File System (HDFS)
The HDFS stores a large amount of data placed across multiple machines, typically in hundreds and thousands of simultaneously connected nodes, and provides data reliability by replicating each data instance as three different copies - two in one group and one in another. These copies may be replaced in the event of failure.