CSS uses Elastic Volume Service (EVS) disks to store your indices. During cluster creation, you can specify the EVS disk type and specifications (that is, the EVS disk size).
- Supported EVS disk types include common I/O (SATA disk), high I/O (SAS disk), and ultra-high I/O (SSD).
- For details about the sizes of EVS disks for different ECSs, see Restrictions.
