HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays, Справочное руководство

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• Recommended SAN solutions and conventions, see “ Best practices ” on page 417.
Design considerations
To design or modify a SAN, evaluate the following:
• Geographic layout
The locations of campuses, buildings, servers, and storage systems determine the required SAN
connections. SAN infrastructure components support long-distance connections and multiple
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interswitch cable segments. Fibre Channel routing interconnects independent SAN islands (fabrics)
or VSANs to form a single, geographically distributed SAN.
For information about supported distances, see “
B-series switches and fabric rules ” on page 93.
• Data availability
A resilient SAN environment minimizes vulnerability to fabric or device failures and maximizes
performance. A mixture of availability levels can be implemented in the same SAN, depending
on the level of protection required for specific applications or data.
For information about availability levels, see “
Data availability ” on page 53.
• Connectivity
Provide enough ports to connect servers, storage systems, and fabric components. To create a
high-capacity SAN, you can connect multiple fabrics or VSANs using routing.
For information about the connections available in a SAN fabric topology, see
“
SAN fabric topologies ” on page 35.
• Storage capacity
Calculate the total storage capacity requirement and determine the type and number of storage
systems needed for current and future requirements.
For storage systems information, see:
• “
MSA storage system rules ” on page 235
• “ EVA storage system rules ” on page 247
• “ XP and VA storage system rules ” on page 263
• Heterogeneous platforms and operating systems
Customize your SAN for specific hardware platforms and operating systems. In a heterogeneous
environment, component interoperability depends on the capabilities and limitations of each
platform.
For information about configuring systems in a heterogeneous environment, see
“
Heterogeneous server rules ” on page 185.
• Scalability and migration
Choose a design that can be expanded incrementally over time as storage and connectivity needs
increase. Migration paths for each of the topologies provide flexibility to expand a SAN. Fibre
Channel routing accommodates expansion with minimal disruption to the network, especially
where growth requirements are not known.
For information about scaling and migrating, see “
Best practices ” on page 417.
• Backup and restore
Provide adequate connectivity and bandwidth to maximize the performance of SAN-based backup.
For information about centralized backup, see “
Enterprise Backup Solution ” on page 275.
• Disaster tolerance
Consider remote data replication requirements to ensure protection against site failures and recovery
of critical data.
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