The optimization rule for systems

One of the rules of optimizing program performance is that there isno point in optimizing code that is not run very often; you optimizethe performance critical code, and then move on to other work. Thereis a similar principle in system design and system administration: improving an area that is not a concern to people does not reallyexcite them . To significantly improve people's lives, you have to workon something that they care about, something that is hurting them now.

An important consequence of people not caring


雨中尋雨,縫裡的縫

零三年以來,每年都去七一,每年都盼好天、盼多人,從來沒有像今年一樣,盼望嘩啦嘩啦下雨,愈暴烈愈好,洗去浮誇的壓倒性慶祝,以灰暗的天替我們流冷汗,隱喻我們的憂患與壓抑,讓我們想起十年前所恐懼的,如何偷偷

拍馬屁聲響足一世紀


路路公主和空姐的真身


Weekly spam summary on June 30th, 2007

This week, we:

  • got 10,108 messages from 265 different IP addresses.
  • handled 22,107 sessions from 2,055 different IP addresses.
  • received 271,991 connections from at least 75,816 different IPaddresses.
  • hit a highwater of 13 connections being checked at once.

Volume is definitely up from last week .As the per day table illustrates, spammers seem to still preferWednesday for their big day:

Day

19


選擇頭條新聞

第一則 頭版頭條

大學情侶 棄屍校園
衣不蔽體 死因迷離

【本報消息】昨日清晨,XX大學一名校工在該校後山一棵大樹下發現一具全裸女屍,馬上通知校方報警。警方到場調查,在女死者伏屍處不足20米外一草叢中發

20070630 網摘 – 燢足十年

71

Web


Why forwarding all email for users is dangerous

The problem with forwarding all email for users is that much of the timeyou wind up forwarding spam email as a result, sometimes a great deal ofit. That is: your mail servers wind up sending spam email, often a lotof it, to the places that your users have forwarded their emails. Thereare two consequences of this.

First, these days large Internet providers like Yahoo don't care whyyou're sending them spam, they just care that you are. When you do sendthem


The stupidity of being nickled and dimed by vendors

We have some current rackmount servers from Sun and HP. They both comewith convenient, built in remote management systems that are basicallyequivalent from my perspective; each has remote power control, KVMover IP, and virtual media . There's only one importantdifference between the two: Sun gives me this for free as part of thebase server but HP wants a few hundred dollars to give me a licensethat enables the useful features (KVM over IP and virtual media).

I suspect you can guess whose servers


something odd

1.
雖然被寫成白痴一樣有點不忿,但在漫長的書面粵語裡我突然難過起來,幾乎要流眼淚——T,為什麼要做這麼危險的事?這種危險到了難以承受的地步。我赫然發 現,這難過原來類似「今人乍見孺子將入於井」。接著電光