HP StorageWorks Enterprise Virtual Array Cluster FIO Starter Kit Betriebsanweisung PDF herunterladen (Seite 35)

NOTE:

Since a VSM port can act as either a target or initiator, having ports from the same VSM in a

single zone can lead to unpredictable behavior and should be avoided. HP recommends all

VSM-related zones have at most one port from each VSM.

• Each zone contains a single initiator device but may contain multiple target devices. A target

device can be represented by multiple ports but an initiator device is represented by only a single

port. Multiple target devices may be placed in a single zone when it can be verified that they are

strict target ports. For example, multiple ports from different EVAs may occupy a single back-end

storage related zone. However, VSM ports which have both target and initiator behavior should

only be regulated to a single port in any given zone.

• Interaction between different zones must be taken into account if they share any devices. For ex-

ample, if two different hosts are accessing the same DPM front-end port through separate zones,

it is important to consider the possibility that the port might become a bottleneck in the configuration

if both hosts are accessing it simultaneously.

Following these guidelines when implementing an HP SVSP zoning configuration allows for simple,

easy-to-understand zones that provide a high degree of control over the activity and allocation of

resources in the SAN. Some exceptions to these general guidelines can be made but only in the case

when the properties of all devices in the zone are well-defined and fully understood. Devices can be

added or removed from the SAN by adding or removing the respective zones to which they are a

member from the active configuration without reconfiguring zones and potentially impacting other

devices. Using “super zones” with a large number of devices is highly discouraged with HP SVSP,

since this can lead to unpredictable communication between devices over the SAN and makes the

zone configuration harder to adjust in the future.

Zoning components in HP SVSP

This section describes zoning between specific components in HP SVSP. Given the complex nature

of the HP SVSP with multiple devices and interactions, the overall zoning configuration can be difficult

to understand if presented in its entirety. By examining each type of zone and providing general

zoning templates, the material in this section can be applied to a wide range of configurations with

different devices. The following zone types will be examined in detail in this section:

• DPM-Host zone

• DPM-Storage zone

• DPM-VSM zone

• VSM-Storage zone

• VSM-VSM zone

Figure 4 illustrates a high-level view of the interaction between devices displaying the types of zones.

Each two-way arrow represents a zone type. Table 3 shows an example of zone naming conventions

for each HP SVSP zone type. Table 4 shows an example of an alias naming convention for each HP

SVSP device port type.

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HP StorageWorks Enterprise Virtual Array Cluster FIO Starter Kit Betriebsanweisung Seite 35