EVS Concepts¶
Concept | Description | Reference |
|---|---|---|
IOPS | Number of read/write operations performed by an EVS disk per second. | |
Throughput | Amount of data read from and written into an EVS disk per second. | |
Read/write I/O latency | Minimum interval between two consecutive read/write operations of an EVS disk. | |
Burst capability | A small-capacity disk can surpass its official maximum IOPS for a short period of time. | |
VBD | A device type of EVS disks. VBD EVS disks only support basic SCSI read/write commands. | |
SCSI | A device type of EVS disks. SCSI EVS disks support transparent SCSI command transmission and allow the server OS to directly access the underlying storage media. |