IBM NeXtScale System, Планирование и руководство по внедрению

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IBM NeXtScale System Planning and Implementation Guide
6.1 IBM standards
IBM standards for factory integration are based on meeting a broad range of
criteria, including the following criteria:
򐂰 Racks are one standard floor tile wide (or deep in the case of iDataPlex), and
fit through 80-inch doorways.
򐂰 Cabling maintains proper bend radius for all cable types while not impeding
maintenance access to any devices and allows rack doors to be closed (and
locked, if required).
򐂰 All components are cabled within the rack.
Also, where practical, inter-rack cabling is connected at one end, coiled up,
and temporarily fastened in the rack for shipping.
򐂰 All cables are labeled at each end, with the source and destination connection
information printed on each label.
򐂰 All components are mounted inside the racks at the destination, and, where
possible, mounted in racks for shipping.
These standards govern the range of systems that can be factory integrated by
IBM, and we consider them to follow best practices given our design criteria.
There are a number of alternative configuration options that are architecturally
sound and based on different design criteria, as shown in the following examples:
򐂰 Not requiring rack doors: This allows for bigger bundles of copper cables to
traverse the fronts of the racks without impeding node access, which can
allow more nodes per rack.
򐂰 Using optical cabling: This allows for smaller cable bundles, so more nodes
per rack or more networks per node can be provisioned without impeding
node access.
򐂰 Using taller racks: This allows for more chassis and nodes per rack.
򐂰 Allowing connections to switches outside the rack; for example, stacked on
top of the rack.
The responsibility for assuring adequate cooling of components, access for
maintenance, adequate cable lengths before integration, and other
considerations become the responsibility of the person or team that is
configuring their own solution.