At Blade Enclosure Level - Compaq BL10e - HP ProLiant - 512 MB RAM Introduction Manual

Figure 2. Rapid response of Dynamic Power Capping avoids circuit breaker trips
No Dynamic Power Capping No Dynamic Power Capping
0 0
Capacity Capacity

At Blade Enclosure Level

When applied at the enclosure level, Dynamic Power Capping takes on additional attributes that
enable more effective power by spreading the Dynamic Power Cap across multiple servers..
Instead of setting the Dynamic Power Cap for individual servers, the IT administrator sets a cap for
the entire HP BladeSystem c7000 enclosure. The Onboard Administrator, working in conjunction
with the iLO 2 management processor, will adjust power caps dynamically based on workload
intensity. Blades running lighter workloads will have their power caps reduced; blades running
more intense workloads will have their power caps increased. Since workload intensity will peak
and subside at different times in most environments, the ability to adjust power caps dynamically
enables IT administrators to set the enclosure-level Dynamic Power Cap below the sum of peak
power consumption for each blade without impacting blade performance.
The first release of Dynamic Power Capping requires N+N power redundancy for the enclosure
and redundant Onboard Administrator (OA) modules. The Dynamic Power Cap for the enclosure
can be set within the OA or from the power management module within HP Insight Control
Environment.
Dynamic Power Capping TCO analysis
This section discusses the TCO benefits customers can anticipate following a successful
implementation of Dynamic Power Capping.
can be allocated to a typical 30Amp 3-phase circuit (208V) when budgeting power via three
methods: power supply faceplate, HP Power Calculator or HP BladeSystem Sizer, and Dynamic
Power Capping. Comparisons were run using the three power budgeting methods for the ProLiant
DL 380 G5 server, ProLiant BL460c G1 server, and ProLiant BL460c G5 server. The difference in
Circuit Circuit
trips trips
Total circuit capacity Total circuit capacity
De‐rated circuit capacity De‐rated circuit capacity
Time (seconds) Time (seconds)
5 5 10 10
Capacity Capacity
Total circuit capacity Total circuit capacity
De‐rated circuit capacity De‐rated circuit capacity
Time Time
The analysis compares the number of servers that
Dynamic Power Capping Enabled Dynamic Power Capping Enabled
Total circuit capacity Total circuit capacity
De‐rated circuit capacity De‐rated circuit capacity
Dynamic Power Cap Dynamic Power Cap
0 0
Circuit Circuit
Safe Safe
Time (seconds) Time (seconds)
5 5 10 10
Total circuit capacity Total circuit capacity
De‐rated circuit capacity De‐rated circuit capacity
Dynamic Power Cap Dynamic Power Cap
Time Time
5