出自:http://www.wealink.com/hp_post_view.htm?postId=28450&handled=
Three word expression_rs are common in English.
Practicing them and using them when you speak will help you sound
more natural. Here are several common expression_rs, along with an
explanation and example sentence. black and white = something which
is extremely clear(黑白分明的;绝对的)
He told her in black and white that she couldn't leave the house
while he was out.
dos and don'ts = the rules (行为准则,须知,注意事项)
There are various dos and don'ts about driving in the UK.
haves and have nots = people who are rich and those who are not
(富人和穷人)
In London you can find the haves and have nots of the
population.
ins and outs = the details (细节,始末,详情)
I don't know the ins and outs of the situation, so I can't really
advise you.
kiss and tell = when someone sells a story of themselves and a
fa
| 分类:技术文章 |
| 分类:技术文章 |
Apache通常是开源界的首选Web服务器,因为它的强大和可靠,已经具有了品牌效应,可以适用于绝大部分的应用场合。但是它的强大有时候却显得笨重,配置文件得让人望而生畏,高并发情况下效率不太高。而轻量级的Web服务器Lighttpd却是后起之秀,其静态文件的响应能力远高于Apache,据说是Apache的2-3倍。Lighttpd的高性能和易用性,足以打动我们,在它能够胜任的领域,尽量用它。Lighttpd对PHP的支持也很好,还可以通过Fastcgi方式支持其他的语言,比如Python。
毕竟Lighttpd是轻量级的服务器,功能上不能跟Apache比,某些应用无法胜任。比如Lighttpd还不支持缓存,而现在的绝大部分站点都是用程序生成动态内容,没有缓存的话即使程序的效率再高也很难满足大访问量的需求,而且让程序不停的去做同一件事情也实在没有意义。首先,Web程序是需要做缓存处理的,即把反复使用的数据做缓存。即使这样也还不够,单单是启动Web处理程序的代价就不少,缓存最后生成的静态页面是必不可少的。而做这个是 Squid的强项,它本是做代
| 分类:乱讲 |