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What EVS Disk Types Are Available?

EVS disk types are classified based on I/O performance. The following table describes the details of each type. EVS disks differ in performance and price. You can choose whichever disk type that is the best fit for your applications by referring to Disk Types and Performance.

Table 1 Maximum performance of an ultra-high I/O EVS disk

Data Block Size (KiB)

Max. IOPS

Max. Throughput (MiB/s)

4

About 50,000

About 195

8

About 44,800

About 350

16

About 22,400

About 350

32

About 11,200

About 350

Table 2 EVS performance data

Parameter

Extreme SSD

Ultra-high I/O

High I/O

IOPS per GiB/EVS disk

50

50

8

Max. IOPS/EVS disk

128,000

50,000

5,000

Baseline IOPS/EVS disk

1,800

1,800

1,800

IOPS burst limit/EVS disk

64,000

16,000

5,000

Disk IOPS

Min. [128,000, 1,800 + 50 x Capacity (GiB)]

Min. (50,000, 1,800 + 50 x Capacity)

Min. (5,000, 1,800 + 8 x Capacity)

Max. throughput

1,000 MiB/s

350 MiB/s

150 MiB/s

Disk throughput

Min. [1,000, 120 + 0.5 × Capacity (GiB)] MiB/s

Min. (350, 120 + 0.5 × Capacity) MiB/s

Min. (150, 100 + 0.15 × Capacity) MiB/s

API name

NOTE:

This API name is the value of the volume_type parameter in the EVS API. It does not represent the type of the underlying hardware device.

ESSD

SSD

SAS

Typical scenarios

  • Databases
    • Oracle
    • SQL Server
    • ClickHouse
  • AI workloads

Read/write-intensive workloads that demand ultra-high I/O and throughput, such as distributed file systems used in HPC scenarios or NoSQL and relational databases used in I/O-intensive scenarios. Typical databases include MongoDB, Oracle, SQL Server, MySQL, and PostgreSQL.

Mainstream applications requiring high performance and high reliability, such as large-scale development and test environments, web server logs, and enterprise applications. Typical enterprise applications include SAP applications, Microsoft Exchange, and Microsoft SharePoint.