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Virtual-to-virtual clustering

Mware ESX Server 1

Virtual Machine 1

(Boot from Local Disks)

Nonshared

CLARiiON LUNs

Virtual Machine 2

(Boot from Local Disks)

Nonshared

CLARiiON LUNs

VMware ESX Server 2

Virtual Machine 1

(Boot from Local Disks)

Nonshared

CLARiiON LUNs

Virtual Machine 2

(Boot from Local Disks)

Nonshared

CLARiiON LUNs

Storage-group: ESX 1

Storage-group: ESX 2

Nonshared

LUNs

(LUN 4, 5, 6)

Nonshared

LUNs

(LUN 1, 2, 3)

Shared LUNs

(Quorum)

(LUN 7)

IN A CLUSTER

Figure 23. Out-of-the-box cluster configuration

Figure 23 shows two VMware ESX servers configured with two virtual machines each. The virtual

machine boot image must reside on local disks to cluster virtual machines. The bus sharing must be set to

physical. The quorum device and/or clustered applications residing on CLARiiON disks are shared at the

CLARiiON level by assigning the respective LUNs to both storage groups. In this case, LUN 7 is assigned

to both storage groups and is a shared LUN. This device is then assigned to Virtual Machine 2 for ESX

Server 1 and Virtual Machine 1 for ESX Server 2, using VMware vCenter for VMware ESX 3.x/ESXi or

the MUI for ESX 2.5.x. Additional CLARiiON disks can be assigned to each virtual machine for running

non-clustered applications.

The shared resource can be configured as raw disks, VMFS, and/or RDM volumes for a virtual-to-virtual

cluster configuration with ESX 2.5.x. If using VMFS volumes for this configuration, the access mode for

VMFS volumes must be shared. For VMware ESX 4.0/3.x/ESXi, only RDM volumes (set to physical and

virtual compatibility mode) are supported for a virtual-to-virtual cluster configuration. For RDM volumes,

both the RDM volume and the VMFS volume that contain the mapping file must be shared by both ESX

servers. The VMFS volume that contains the mapping file must be in public access mode.

EMC CLARiiON Integration with

VMware ESX Server

Applied Technology 39

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