Pooling xenserver hosts – HPP Enterprises P4000 SAN User Manual
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Figure 27. Configuring Network RAID for a particular volume
Pooling XenServer hosts
Multiple XenServer hosts can be deployed to support VMs, with each host utilizing its own resources
and acting as an individual virtualization platform. To enhance availability, however, consider
creating a XenServer host resource pool (that is, a group of similarly-configured XenServer hosts
working together as a single entity with shared resources, as shown in Figure 28). A pool of up to 16
XenServer hosts can be used to run and manage a large number of VMs.
Figure 28. A XenServer host resource pool with two host machines
Key to the success of a host resource pool is the deployment of SAN-based, shared storage, providing
each host with equal access that appears to be local.
With shared storage, VMs can be configured for high availability. In the event of a XenServer host
failure, a VM would leverage Citrix XenMotion functionality to automatically migrate from the failed
host to another host in the pool.