Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Bedienungsanleitung PDF herunterladen (Seite 21)

Figure 12. ESX multipathing default configuration

The default ESX 3.5 multipath configuration may result in imbalanced SAN and EVA controller load. This

can affect performance under heavy workloads, with all I/Os being processed by only one Host Bus

Adapter and one EVA controller.

To optimize storage paths performance, HP recommends configuring a preferred path on the ESX host for

each LUN. Ensure the multipath policy is set to Fixed, and then manually assign a preferred path connecting

to the EVA managing controller for each of the presented LUNs. HP recommends setting an identical

multipathing configuration on all ESX hosts sharing storage LUNs so that, regardless of which host a VM is

executing on, storage is configured and optimized the same way.

Storage Paths can be configured using VMware Infrastructure Client (Configuration Tab and then Storage

Adapters), by using the command line tool esxcfg-mpath at the ESX server console or by using the VI

toolkit (PowerShell). A scripted approach helps to consistently set multipathing in environments comprising

of a large number of LUNs and ESX hosts.

Figure 13 shows an optimized connection diagram in which each LUN is assigned a preferred path, using

vmhba1 for the first four LUNs and vmhba2 for the remainder.

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Brocade Communications Systems StorageWorks 4400 - Enterprise Virtual Array Bedienungsanleitung Seite 21