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July 24, 2012

Mtg: Star-Caps: Cluster Power Management Using Software-Only Models

by @ 4:19 pm. Filed under ALL, Computers/Software, Electrical/Power, Engineering Mgmt

MONDAY August 13, 2012
SCV Computer Chapter
Speaker: John Davis, Microsoft
Time: Networking and Refreshments at 6:30 PM; Presentation at 7:00 PM
Cost: none
Place: Cadence / Bldg 10, 2655 Seely Ave, San Jose
RSVP: from website

Star-Cap is a high-fidelity, real-time, software-only power modeling and management system for computer clusters.? The foundation of Star-Cap is a power model generator that produces full-system power models for predicting power consumption for a cluster solely based on OS-level performance counters (obviating the need for expensive and/or intrusive hardware measurements).? Star-Capâ??s cluster power management module uses these models to implement a proactive power capping mechanism with the ability to distribute a cluster’s power budget non-uniformly across nodes.
Star-Cap has been evaluated on a variety of Map Reduce-style workloads on hardware platforms ranging from low?end embedded to standard commercial servers.? On a low-power server system, Star-Capâ??s overhead for collecting, computing, and reporting data is less than 1% CPU utilization.? Depending on application and platform, Star-Cap improves cluster throughput by 14-43% compared to using a uniform power cap distribution policy with a purely reactive power capping mechanism.? Furthermore, Star-Cap maintains cluster throughput while reducing overall cluster power budget by 14% with no additional capital or operating cost.? Star-Capâ??s proactive power capping mechanism also improves system response time to power cap violations by 2-10 times.? Because of its ability to improve cluster throughput and manage power consumption, as well as its low overhead and cost, Star-Cap is an ideal candidate for power management in power-efficient, low-cost data centers.

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