CBU is a member of the family of flexible Capacity on Demand offerings for IBM System z9 and eServer zSeries. CBU helps provide reserved emergency backup processing capacity for situations in which you lose capacity in another part of your establishment, helping you recover by adding reserved capacity on a designated System z9 or zSeries system. A CBU system normally operates with a base processing configuration and with a pre-configured number of additional processing units reserved for activation in case of an emergency. The activation is typically done electronically - and quickly - helping to eliminate time otherwise spent waiting for a technician to arrive.
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