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FusionCloud 6.3.0 Solution Description 05

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VMware EVS

VMware EVS

What Is VMware EVS?

VMware Service provides VMware EVS for you to use VMware EVS disks. A VMware EVS disk is a scalable virtual block storage device that is based on the distributed architecture. By interconnecting VMware Service with VMware vCenter, VMware EVS disks can be centrally managed on ManageOne.


VMware EVS has the following advantages:

  • VMware EVS disks are more cost-effective than hard disks on physical servers.
  • VMware EVS facilitates virtual disk resource management.
  • VMware EVS disks avoid the bottleneck of traditional system disks. Physical memory is efficiently virtualized into a physical hard disk, so that data read and write of hard disk files are converted into data access to memory. Speed of accessing physical memory is much higher than that of the traditional hard disks. Therefore, the data read and write speed can be greatly improved, the hard disk bottleneck can be avoided, and the computer performance can be improved rapidly.
  • VMware EVS disks can be attached to a VMware ECS or detached from a VMware ECS in the region without stopping or restarting the server. Capacity of a VMware EVS disk can be flexibly configured and can be expanded on demand.

Application Scenarios

VMware EVS applies to the following scenarios (Figure 37-6 shows the details):

  • VMware EVS disks have higher data reliability and I/O throughput and are easier to use than hard disks on physical servers. VMware EVS disks can be used for file systems, databases, or system software or applications that require block storage devices.
  • VMware EVS disks provide high-performance and high-reliability data storage functions and are applicable to high-load and mission-critical service systems.
    Figure 37-6 Application scenarios of VMware EVS

Implementation Principles

Logical Architecture

Figure 37-7 shows the logical architecture of VMware Snapshot.

Figure 37-7 Logical architecture of VMware Snapshot

Table 37-3 Descriptions of VMware Snapshot logical architecture

Component Type

Component Name


VMware Service console

VMware Snapshot UI

Provides the UI for VMware Snapshot Console.

Services of VMware Snapshot

VMware Snapshot

Processes the operation request of VMware Snapshot Console.


Processes VMware Snapshot operation tasks.

Common component


Provides level-1 load balancing.


Provides level-2 load balancing.


Supports identity identification and access control for VMware Snapshot.

API Gateway

Allows a third-party application to call VMware Snapshot APIs.


Figure 37-8 shows the VMware Snapshot workflow.

Figure 37-8 VMware Snapshot workflow

  1. VDC administrators or VDC operators apply for VMware snapshots from the ManageOne operation plane. VMware Service delivers the operation requests to VMware Snapshot for processing.
  2. CoreTask processes tasks transferred by VMware Snapshot.
  3. API Gateway distributes the requests for vCenter systems.

Related Services

VMware EVS: VMware EVS disks can be attached to VMware ECSs and used as scalable block storage devices, as shown in Figure 37-9.

Figure 37-9 Services related to VMware EVS

Accessing and Using VMware EVS

FusionCloud provides a web-based service management platform. Specifically, users can access the service using the ManageOne operation plane or API.

  • ManageOne operation plane

    Users can use the ManageOne operation plane to access the cloud service. If you are a VDC administrator, VDC operator, or have the operation rights of the cloud service, you can directly log in to the ManageOne operation plane and choose this cloud service under the Product List or Console menu.

  • API

    To integrate the cloud service into a third-party system for secondary development, use the corresponding API to access this service. For details, see the FusionCloud 6.3.0 API Reference.

Updated: 2019-04-23

Document ID: EDOC1100026685

Views: 151985

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