Concept Of Adaptive Budgeting - Fujitsu PRIMERGY ServerView BX900 User Manual

Power Management
Consumption Schedule For All Server Blades
The settings in this box are enabled when Scheduled mode is selected in the System Power Consumption Modes box.
Here two different or identical times, each of which is assigned to a consumption mode, can be specified for the
system unit and for each weekday.
Adaptive Budgeting Priority Table
This priority table enables the server blades to be arranged in order to specify a sequence of priorities The server
blade at the top has the highest priority.
The priority table of the server blades is evaluated in various cases:
– In the consumption mode Adaptive, Server Blade Priority strategy, the table controls the assignment of the
consumption budget.
– If consumption limitation is configured for the system unit, the table controls which server blades are off or are
not switched on when power-on takes place.
– In the event of excessive power consumption as the result of a fault, the table controls the emergency shutdown
sequence of the server blades. The shutdown starts with the server blade at the bottom of the table which has
the lowest priority.

5.2.4.1 Concept of Adaptive Budgeting

Adaptive budgeting enables more server blades to be operated in a BX900 chassis then would be permitted with
a standard power budget. In addition to the fixed chassis components, the maximum power consumption of the
individual server blades is normally added in order to calculate the power budget. The maximum power
consumption of an individual server blade varies depending on the blade configuration. This ensures that the entire
system also has adequate reserves, even when operating under full load.
If the system no longer has any power budget available, no additional server blades can be switched on, although
individual servers frequently do not use their maximum budget.
Adaptive budgeting bypasses this problem by re-calculating the budget for the individual server blades at specific
time intervals. Two strategies can be used to calculate the budget in an "adaptive" way. The adaptive budget is
generally calculated on the basis of the average consumption of late. To do this, the power consumption of the last
evaluation period is used as a basis and periodically re-adapted.
Alternatively, the server priority table can also be used as a policy.
Two different options are available for the periodic re-calculation of the budget. One option is to measure the
consumption of the individual blades for the period defined and to then use this with a safety reserve as a new
power budget for this server. The other option is to prioritize the blades. The blade with the highest priority receives
the most from the power budget. The priority is defined in the Adaptive Budgeting Priority Table. The blade at the top
has the highest priority.
Adaptive budgeting can be activated within the Consumption tab, first box System Power Consumption Modes. It is set
by default.
ServerView BX900 Management Blade
Control via Tabs
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