最近留連 Pandora ,「培養」了一個我稱為 Michael Crawford 的 Station (因為我逢見到 Michael Crawford (下稱 MC) 的我也會「舉手指」評分)。結果當然是累積了不少 Vocal harmony 類的歌手。除了 Michael Crawford 外,也經常「抽中」Michael Ball (下稱 MB) 的歌。兩個 Michael 兩種聲,其中最大的分
A SMTP implementor's conundrum
Today I ran across a good example of the sort of engineering conundrumthat bedevils people who implement things like SMTP clients:
In a multiline SMTP reply , which replycode should you use if different lines of the reply have differentcodes?
That is, in a regrettably non-hypothetical example, if you send aserver ' Should your client go on and send a If you walk up to the console of some Linux machines that have theircapslock turned on and try to log in, an interesting thing happens: (This works with Ubuntu 6.06, but not with Fedora Core 6.) Why does this happen? Once, long ago, there were terminals that only did upper case, and therewere people who wanted to connect them to Unix systems. So Bell Labs puta We put a new SMTP frontend machine in front of our core mail servertoday to handle incoming email from the outside world (for the usualreasons: dealing with spam better, shielding the core server fromsix zillion zombies all trying to talk to it at once, etc). Rather than wait for updated MX entries for all our domains to propagatearound and for people to switch to them, we figured we could speed upthe process by having our bridging firewall send connections for the coreserver's port 25 Our SMTP frontend crashed and restarted three times this week, twice onWednesday around 6pm and the third time today at 3:16pm, so some of ourstats are really fragmentary. Still, this week we: One of the small paradoxes of the web is that it is often theconnections with the least bandwidth that put the largest load on yourweb server. This is because each connection consumes a certain amount of serverresources, ranging from kernel data structures for socket buffers up toan entire thread or process on a dynamic website. The slower someone'sconnection, the longer they tie up up this stuff on your end as youslowly feed them data. Conversely, people on fast connections get in,get their data, MAIL FROM:250-There's a problem.454 please try later
RCPT TO ,
An example of Unix's slow fossilization
keyx login: CKSPASSWORD:[...]CKS@KEYX:~$
誠徵 X'mas partner (revised version)
公司安排了我這顆寂寞芳心23-27號留在香港,那唯一可以做的,就是寫下這篇你正在看的blog。
總覺得傷心就像感冒一樣,吃藥過後,三兩天便會康復。當然,一星期後又可以被人惹病了。
然而,寂寞呢,就像咳嗽。
嘉賓:陳順馨、韓小雲
訪問中讀的飲江詩今晚上載。在對內地孕婦的抹黑之下,加倍需要對女性生產的敬意。
****
蘋果日報報導了卡夫卡的消息,這份報導經各方努力才成事,文化推廣眾志成城。唯文
A limitation of OpenBSD bridging NAT firewalls
粉絲時間
希望大家支持
Weekly spam summary on December 9th, 2006
An irony of web serving
Menu