Virtual Combat: The four Vplex of disaster tolerance design

Vplex storage devices such as the emergence of a dual-live data center, the most efficient use of computing and storage resources.

In the "disaster tolerance design of the three stretched Cluster" we introduced the concept of stretched Cluster, EMC Vplex is stretched Cluster support one of the storage devices. This article probably describes the integration of EMC Vplex and VMware stretched cluster. Of course Vplex can also be used independently.

A Vplex Introduction

See more highlights of this column: http://www.bianceng.cnhttp://www.bianceng.cn/Servers/virtualization/

Stretched cluster storage requirements are that virtual machines can access data in any disaster, and that performance is unaffected. After a disaster recovery, the storage device tries to automatically switch to the original settings to avoid interruption of service due to excessive human intervention.

Let's see if Vplex can meet these needs.

Vplex Metro, for example, has three salient features:

Compatibility: Vplex can manage not only EMC's storage devices, but also many other vendors ' devices.

Distribution: Vplex put the underlying storage resources together, creating a middle layer called distributed Volume. vsphere cluster do not need to know what storage devices to use at the bottom, just create the data store on the distributed volume. Distributed volume supports VMFS and RDM.

Intelligence: Assuming that a VM on site A has write operations on the data on the distributed volume, Vplex will do the same on both site A and site B's storage devices. Note that the write operation is initiated by local Vplex devices for local storage, and does not cause delays in offsite writing. The read operation is done locally.

Two architecture decisions

Assuming that you have decided to use stretched Cluster, in assessing Vplex you need to consider the following important architecture Decision

Choose which type of Vplex device