In some situations, you might want unicast support in Access Grid because multicast is not available or impossible to implement, e.g., VPN. Fortunately, Access Grid comes with built-in unicast-to-multicast bridge support especially Access Grid 3. However, it is a kind of undocumented feature. I found a few tutorial how to run it. Actually, there are many possibility to run a bridge in Access Grid 3.

I had a chance to deploy Access Grid 3.0.2 for an intranet where as a private venue server is required. However, installation didn't go smooth as I expected because I got Error entering venue whenever I tried to connect to the server. It used to work perfectly when it is Access Grid 2.4. Anyway, I'm not only one got this error, at least I found this thread. The situation looked like Everybody role were not allowed to call GetState() of the venue.

I found a proof of concept of green power at EcoGeek. It's all about making a cluster with processing power of 22.7 GHz using 30A power from vegetable-oil-powered generator.

I have seen the first problem in using [NPACI Rocks 4.2][]. The symptom is I was unable to submit just a basic job to [SGE][] because of following error in standard error file.

MANTYPE: Undefined variable

In fact, I don't have Nintendo DS aka NDS but my friend has one. It looks very impressive when playing game. Not only playing game, NDS is capable to play movie too. The secret weapon is Moonshell DS and its DPG tools. If I'm not wrong, you need 2 files: Moonshell DS 1.1 and Moonshell 1.1 DPG Tools. So, as I expect, I have to convert movie files into .DPG to play in NDS. I have heard about dpgenc which seemed to bundle with the DPG tools but I do want to know how it works. Actually, I would like to use my linux box at night. And I found BatchDPG which is an open source DPG conversion tool relying on Avisynth and mencoder. Eventually, I know what is DPG actually.

As of today, there are so many benchmark to measure performance of any computers into a number for later comparison against other models. I will not talk about that it totally depends on what you want to do exactly. Generally, the performance of a computer directly depends on speeding of floating point operation so it is possible to calculate the upper bound of its performance, Theoretical Peak Performance, by an easy equation.

Rpeak = [CPUs] x [CPU Clock rate (GHz)] x [CPU floating point issue rate]

where

CPUs = [the number of processor] x [the number of cores per processors]