Updated on 2025-09-19 GMT+08:00
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. |
Parent topic: Basic Concepts
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