http://queue.acm.org/detail.cfm?id=2071256
Nice intro to IO in virtualization; benefits, challenges, and solutions.
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Posted 14 January 2012
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http://en.wikipedia.org/wiki/Bufferbloat
Buffers in the middle of network may interfere with TCP congestion control and may slow down a network.
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Posted 13 January 2012
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Posted 06 January 2012
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http://en.m.wikipedia.org/wiki/Test%5Fand%5FTest-and-set
Instead of simple test and set, loop over test to save expensive memory access.
One should be really careful to avoid double checked locking failure, and this shouldn’t be used in high level language in general.
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Posted 06 January 2012
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http://www.ocert.org/advisories/ocert-2011-003.html
Hash collsision based attack to key value store. If a webapp uses the given key as it is, i.e., it’s not including timestamp or some salt, it is vulerable this type of attack.
I like hacking as most of them spring from this kind of creativeness.
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Posted 29 December 2011
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http://www.ccs.neu.edu/home/amislove/publications/Inferring-WSDM.pdf
Friends share social attribute, e.g., school. Thus, even if you hide your profile, it could be predicted from your friends’ profile.
This is so true… When I was looking for people to follow on twitter, I started from some engineers I know of. After some time, I was able to follow many people working for the same company with my friends.
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Posted 03 December 2011
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Posted 30 October 2011
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http://i.stanford.edu/~ullman/mmds.html
It’s a free ebook in pdf. At first, I just shared the link on twitter without reading it. Later, after reading some chapters, I realized that this book covers algorithms for massive data sets really nicely. Some concepts, for example, combiner(ch2), shingling and minhashing (ch3), bloom filter(ch4), association rules(ch6), etc., are must know concept if you work with large data.
Plus, the book is surprisingly easy to read. Authors explain algorithm with many example in human language unlike other data mining books which deliver concept with tons of mathematical notations.
I highly recommend the book.
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Posted 21 October 2011
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Posted 02 October 2011
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