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11 Mar 2011

Fri, 11 Mar 2011

Nonlinear optimization: happy with NLopt

Optimization is a mess, so use a library for it - but which?

After looking at several open-source candidates, I settled with NLopt. Strong points are

posted at: 23:43 | path: /academic | permanent link | 0 comments

interesting paper: Cycles, Cells and Platters: An Empirical Analysis of Hardware Failures on a Million Consumer PCs

I find this particular paper by Nightingale (Microsoft Research) quite interesting (will be presented at EUROSYS '11); it analyses data collected by the Windows Error Reporting system (crash dumps) to look at CPU, DRAM and disk failure rates.

Some of the things learnt:

Another interesting piece of work is Google's Failure Trends in a Large Disk Drive Population, FAST '07.

posted at: 16:11 | path: / | permanent link | 0 comments

Sending email and blacklisting

It becomes increasingly harder to operate your own, small SMTP server. Large providers (gmail, hotmail) depend on IP repudation lists and as a small VPS operator your are in a large pool with other people. Interestingly, the US is the worst spam country.

multirbl.valli.org looks interesting too.

On the other hand, I did not have trouble sending email... hello, can you hear me? :-)

posted at: 10:45 | path: /rant | permanent link | 0 comments

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