道別是很可怕的，在巴士上內外齊聲高叫「AN-ANTI-ANTICAPITALISTA」——明知道別時一切都會超現實地美好必須打折，但還是無法抵抗，道別就是這樣可
The case of the mysteriously failing connections
One of the strange networking mysteries around here is that every sooften, one of our login servers will report that outgoing mail wasdelayed because it could not connect to the mail server's SMTP port.There's several things that make this puzzling:
- the connection is failing with 'host not reachable' errors, not'connection refused' or the like
- the mail server is up, running fine, and not loaded at all
- the login servers and the mail server are on the same subnet,although they are
Weather
I admit it. There are times when I was too serious about weather, getting myself overwhelmed and uptight.
When I first arrived at Hallstatt in Austria last month, I met all that rain. The city, supposedly rich in pastel-coloured houses casting spectacular reflections onto the glassy water of the lake,
Skating
I decided to learn ice skating this year. The other day, I went to the ice skating rink after work and asked about lessons that fit my schedule. The receptionist at the counter smiled, apparently having already figured out
Internet software decays and must be actively maintained
While it is true that in general software doesn't wear out , this is not true for software thatinteracts with the Internet. Internet software definitely breaks downover time, not because of any analog to mechanical wear but because theInternet environment it operates in keeps changing.
There are three sorts of changes in the Internet environment thatmatter. First, protocols and other programs that interact with youevolve over time. Second, user expectations also evolve. Third and mostimportantly, the Internet threat environment itself keeps changing,
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Detailed usage charges versus simpler charging models
If you are going to charge for things , one ofthe eternal questions is whether you should use detailed usage chargesor simpler, 'flatter' ones. My personal thoughts run something likethis:
If you have a fixed service that you're expanding slowly (if atall), detailed charges theoretically extract the maximum value forit. However, they do so at the cost of driving away users who don't likethe unpredictability of their bills, and every so often you will havesomething go horribly wrong