This article discusses how the increase in renewables in Germany (a massive 55GW) has caused congestion in the transmission grid and also affected system stability. Makes for some very interesting reading!
Efficient Idle Desktop Consolidation with Partial VM Migration
Eyal de Lara
University of Toronto
10:30AM Thursday 31 May
Recent surveys have found that enterprise desktops spend most of their time idle. Despite the fact that idle PCs consume up to 60% of their peak power, these systems have been found to remain powered in order to allow applications with network presence to remain online (e.g. IM, VoIP, remote desktop). Virtual machine (VM) consolidation has been proposed as a solution for this problem by using virtualization to migrate the user’s computational environment to a server while the desktop is suspended to low power mode. Unfortunately, energy-oriented full VM migration does not scale well in office environments; desktop VMs require large amounts of memory, resulting in low consolidating ratios, and network congestion that lead to long resume latencies.
I will present Partial VM Migration, an approach that transparently migrates only the working set of an idle VM, and show that this approach is better suited to enterprise offices. Partial VM Migration is effective at reducing energy use of idle desktops, leads to small migration sizes and migration latencies, and provides high VM consolidation ratios on the server.
Eyal de Lara is an Associate Professor in the Department of Computer Science at the University of Toronto. Eyal received his Ph.D. and M.Sc. from Rice University in 2002 and 1999, and a B.Sc. from the Instituto
Tecnologico de Monterrey in 1995. His research interests include distributed systems and mobile computing. His research has been recognized with an IBM Faculty Award and a NSERC Discovery Accelerator
Another home energy management system:
There are several very interesting presentations here; all from the utility point of view, but with a good understanding of the role of information technology.
The 2010 vision paper by Profs. Keshav and Rosenberg has been selected for inclusion in this site. Here is a link.
Here we will post updates and news about our group.
Abstract: Several powerful forces are gathering to make fundamental and irrevocable changes to the century-old grid. The next-generation grid, often called the `smart grid,’ will feature distributed energy production, vastly more storage, tens of millions of stochastic renewable-energy sources, and the use of communication technologies both to allow precise matching of supply to demand and to incentivize appropriate consumer behaviour. These changes will have the effect of reducing energy waste and reducing the carbon footprint of the grid, making it `smarter’ and `greener.’