Fascinating list this, particular when they advise that instead of going into semi-conductors you may want to look at Database Administration instead. Where is the relationship to semi-conductors? You may as well said “Sheep Herding” – which incidentally is my own pipe-dream should this computer game finish.
We rely on memcache pretty heavily at Tumblr, with over 10TB of cache memory available across the stack. One of the things we’ve historically had a challenging time with at Tumblr is finding hot keys. A hot key is a memcache key getting dramatically more activity than other keys….
I do love a good scaling story. Hardware these days is so cheap that solutions such as a 10TB memory cache is achievable without a relatively large cost. Cloud computing has opened up the possibilities for people to really push the limits of what is possible.