古巨基有首歌：「其實我想講清楚…想講清楚…想講清楚…該怎說好？」，完全可以體現在我身上。
事緣最近有兩件事，小弟都有份出席，要說說話，但一聽就知口齒不清，思路混亂，不停「食螺絲」。第一件是三聯搞的《How we
Weekly spam summary on February 3rd, 2007
This week, we:
- got 15,790 messages from 280 different IP addresses.
- handled 23,657 sessions from 1,340 different IP addresses.
- received 248,408 connections from at least 73,118 different IPaddresses.
- hit a highwater of 17 connections being checked at once.
Volume is up again from last week ,although the number of different IPs is down slightly.
| Day | Connections | different IPs |
| Sunday | 28,8 |
週末派對
1. 文靜的真正行動之殘廢餐
之前已經貼過 表格的link ，如果一頁紙都唔識填， 2月3日星期六 11:30 - 18:00，干諾道中通往原天星碼頭行人隧道口，會有人擺街站教你填。識填的過去做義工亦得。
為了鼓勵更多市民表
無題
之一
雜誌出了新一期，開心。
個人推薦“我愛沖咖啡”一文，看完了，會覺得年輕人還是對自己有要求的，雜誌出版之前，我也把這篇報導的內容跟一些年輕人交流，他們也很認同這個故事。我喜歡這樣的少年心聲，祥子，你這
雜誌出了新一期，開心。
個人推薦“我愛沖咖啡”一文，看完了，會覺得年輕人還是對自己有要求的，雜誌出版之前，我也把這篇報導的內容跟一些年輕人交流，他們也很認同這個故事。我喜歡這樣的少年心聲，祥子，你這
A modern environment's need for broadband
I have an embarrassing confession: my home Internet connection is stilla dialup 28.8Kbps PPP link. (Back when I first set it up, this was onlyslightly behind the times, as 33.3Kbps modems had just come out.)
For a long time this was fine, because all I really did with it wastext-based stuff, mostly sshing to my machines at the university; whileI did do some web surfing, pretty much all of the sites I visitedregularly were
Why don't SQL servers do a lot of caching?
Recently, nothings askedan interesting question in a comment here :
[...] why, under the hood, deep down, is something like memcachednecessary? Why isn't the SQL server's cache as effective?
I think that one of the reasons for this is that highly aggressivecaching in an SQL server is much harder than it looks.
In database servers, caches have to be transparent ;non-transparent caches would implicitly break ACID guarantees. Now contemplate theproblem of completely correct cache invalidation that
Transparent versus non-transparent caching
One of the divisions in caching is between what I will call transparentand non-transparent caches. Transparent caches are ones where the onlything you are supposed to notice is faster speed; non-transparent cachesrequire you to manage them explicitly, especially cache invalidation.Operating system disk caches are an example of transparent caches, atleast in theory.
(At some level every cache is non-transparent, because it has to bemanaged by someone's code. So this is just a question of how a cache
從自己的宇宙
半夜失眠的人被諸種學名不一的死亡藤蔓纏繞。身份看來是渡過無岸之河的筏子，於是我上you-tube煲片選擇成為一個排球迷，潛心聆聽偉大的俄羅斯語。你知道俄羅斯的語言代表什麼嗎，那就是你很神心地上到俄羅斯的報紙、球
The inherent fragility of complex systems (in system administration)
It's not that complex software systems are inherently fragile for theusual reason, because they have more places and pieces to go wrongthan simple systems do; unlike physical machines, computer softwarehas no mechanical wear and thus doesn't just break on its own (barringintrinsic flaws). Living in a digital world, computer software thatworks keeps working forever until something changes.
The real problem with complex systems is that it's very hard for peopleto keep track of all of the interrelationships, and thus
Why I am not fond of DHCP in lab environments
Using DHCP to assign IP addresses is pretty popular in environments withlots of machines. You'd think that student labs, full of generic machines,would thus be a great environment for DHCP, but actually I disagree; Ibelieve that (normal) DHCP is not a great match for a lab environment.
The problem with DHCP is that it ties the IP address to the wrongthing. In a lab environment you don't want a machine's IP addressto be tied to its hardware; you want