EVS Concepts¶
Concept | Description |
|---|---|
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 | The burst capability allows the IOPS of a small-capacity disk to reach the disk IOPS burst limit, which can surpass the disk IOPS limit within a certain 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. |