English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Data centers consume a large amount of energy and incur substantialelectricity cost. In this paper, we study the familiar problem of reducing datacenter energy cost with two new perspectives. First, we find, through anempirical study of contracts from electric utilities powering Google datacenters, that demand charge per kW for the maximum power used is a majorcomponent of the total cost. Second, many services such as Web search toleratepartial execution of the requests because the response quality is a concavefunction of processing time. Data from Microsoft Bing search engine confirmsthis observation.  We propose a simple idea of using partial execution to reduce the peak powerdemand and energy cost of data centers. We systematically study the problem ofscheduling partial execution with stringent SLAs on response quality. For asingle data center, we derive an optimal algorithm to solve the workloadscheduling problem. In the case of multiple geo-distributed data centers, thedemand of each data center is controlled by the request routing algorithm,which makes the problem much more involved. We decouple the two aspects, anddevelop a distributed optimization algorithm to solve the large-scale requestrouting problem. Trace-driven simulations show that partial execution reducescost by $3\%--10.5\%$ for one data center, and by $15.5\%$ for geo-distributeddata centers together with request routing.

Reducing Electricity Demand Charge for Data Centers with Partial Execution