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CLARiiON and virtual machine clustering

Clustering refers to providing services through a group of servers to achieve high availability and/or

scalability. Clustering with VMware ESX Server is supported at the virtual machine level. Refer to the E-

Lab Navigator for the cluster software products that are supported on virtual machines. To implement

clustering at the virtual machine level, the virtual machines must boot from local disks and not CLARiiON

disks. There are two types of cluster configuration at the virtual machine level:

• In-the-box cluster

• Out-of-the-box cluster

 Virtual to virtual

 Virtual to physical

In-the-box cluster

This section outlines clustering virtual machines on a CLARiiON storage system between virtual machines

on the same VMware ESX server. This provides simple clustering to protect against software crashes or

administrative errors. The cluster consists of multiple virtual machines on a single ESX server.

VMware ESX Server

Applied Technology 38

Figure 22. In-the-box cluster configuration

VMware ESX Server

Virtual Machine 1

(on local disks)

Nonshared CLARiiON disks

Virtual Machine 2

(on local disks)

Nonshared CLARiiON disks

Shared CLARiiON LUNs

Figure 22, a single VMware ESX server consists of two virtual machines. The quorum device and/or

clustered applications are shared between the two virtual machines. Each virtual machine can have virtual

disks that are local to the virtual machine, that is, virtual disks not shared between virtual machines. The

device containing the clustered applications is added to the storage group of the VMware ESX server and is

assigned to both virtual machines using the VMware MUI for VMware ESX Server 2.5.x or VMware

vCenter for VMware ESX 4.0/3.x/ESXi. Additional CLARiiON disks can be assigned to each virtual

machine for running other non-clustered applications. Only virtual disks on VMFS volumes are supported

with this configuration for ESX 2.5.x. With ESX Server 4.0/3.x, RDM volumes are also supported with an

in-the-box cluster.

Out-of-the-box cluster

An out-of-the-box cluster consists of virtual machines on multiple physical machines. The virtual disks are

stored on shared physical disks, so all virtual machines can access them. Using this type of cluster, you can

protect against the crash of a physical machine.

EMC CLARiiON Integration with

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Dell AX4-5 Especificaciones Pagina 38