HP Surestore 64 Planning Guide - Page 67
Capacity Planning, Point-to-point, Multiswitch fabric, Arbitrated loop
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• Point-to-point A dedicated point-to-point connection through the director is simple to implement and should be considered for server-to-storage applications where high performance, high availability, or extended distances are required. • Multiswitch fabric Support of multiswitch fabric operation is a major feature of the director. Consider installation of multiple directors (or other switch elements) to form a high-availability fabric topology that supports multiple, full-bandwidth data transmission paths between servers and devices. • Arbitrated loop Although the director does not support direct connection of arbitrated loop devices, such devices can communicate with the director through selected Fibre Channel devices. Contact your local HP sales representative for a list of supported devices. Capacity Planning Consider the data traffic capacity of the enterprise (normal and peak load) as part of the director planning and installation process. Capacity planning: • Ensures SAN traffic is distributed and balanced across servers, storage devices, and the multiswitch fabric. • Identifies traffic bottlenecks and provides for alternate paths through the multiswitch fabric during peak load times or when fabric elements are serviced. • Assists in calculating scalability to satisfy nondisruptive growth requirements. Capacity planning is a dynamic activity that must be performed when new devices, applications, or users are added to the enterprise. Planning a Fibre Channel SAN Configuration 53 Planning Considerations