HDFS storage types
The storage type identifies the underlying storage media.
HDFS supports the following storage types:
- ARCHIVE - Archival storage is for very dense storage and is useful for rarely accessed data. This storage type is typically cheaper per TB than normal hard disks.
- DISK - Hard disk drives are relatively inexpensive and provide sequential I/O performance. This is the default storage type.
- SSD - Solid state drives are useful for storing hot data and I/O-intensive applications.
- RAM_DISK - This special in-memory storage type is used to accelerate low-durability, single-replica writes.