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zhangyue d05287d5d6 EVS UMN DOC 
Reviewed-by: Miskanin, Jan <jan.miskanin@t-systems.com>
Co-authored-by: zhangyue <zhangyue164@huawei.com>
Co-committed-by: zhangyue <zhangyue164@huawei.com>
2024-05-09 07:19:17 +00:00

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EVS Concepts

Table 1 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.
Parent topic: Basic Concepts