Caiwangqin's blog

一个人一个SNS

Caiwangqin — Wed, 27 Aug 2008 19:18:02 +0800

UCenter Home 是个很不错的产品，为了研究这个产品，同时管理好自己的朋友。我建立了蔡望勤的朋友圈，全封闭，需要邀请才能加入。有人说这个产品就是一个加强版的个人通讯录，一个人一个SNS就是很自然的事情了。

我会非常有选择的添加我自己的朋友到我的朋友圈，我希望添加的朋友们，都是我严肃和认真的认为是自己宝贵的朋友的人，并且一定是和他见过面的。

欢迎来到蔡望勤的朋友圈，我为认识你而感到高兴！

Technorati : SNS

Google Reader shared items [2008-08-18]

Mon, 18 Aug 2008 00:00:00 +0800

下定决心迁移blog去GAE了
终于下定决心准备把本blog迁移到Google Apps Engine上去，虽然目前GAE被墙掉了，但我可能会在迁移完成后设置反向的代理来解决国内不能访问的问题。　最终决心迁移的原因如下：－　我的小virtual dedicated server实在太不强大了，内存小，cpu弱，所谓便宜没好货。:)..

《Web开发大全-ROR版》推荐序

Caiwangqin — Wed, 13 Aug 2008 10:53:41 +0800

bd7lx参与写的”莲花宝典”即将出笼：Web开发大全：ROR版, 我之前为此书写了一个推荐序,现在已经可以在China-pub上预订了.

很荣幸应邀为本书写推荐序。

看到样章时，我的第一感觉是亲切。本书的作者都是我的老熟人,而且他们的名字在业内颇具影响力,全书共分10章,虽然未能包含Ruby on Rails的所有方面，但每一章都是从实际经验中总结出的精华。可以毫不夸张的说，只要跟着本书进行一遍学习实践，你就已经完成一个功能全面的网站建设。

我做了十年的程序开发，前三年主要使用Turbo C 2.0，之后七年都在做Web开发。分别使用过ASP，PHP，.NET，JAVA，自从2005年底我尝试使用ROR开发了一个Mushup应用后，我为ROR作为一个Web Framework的惊人表现力欣喜不已。相对于用JAVA开发Web来说，ROR终于让我在奔波了几年后，找到了一双合脚而又好看的皮鞋。

大家都知道二十一世纪最缺乏的是什么，现在这种形式依然没有得到改变，在过去的一年时间里，我们在招聘ROR人才时仍然非常困难。究其原因，我想一方面是学校教育和市场需求的脱节，另一方面是行业协会的无所作为。这本书作为《Programming Ruby中文版》第2版和《应用Rails进行敏捷Web开发》两本翻译之后，由中国人自己书写出版的书籍，是对前两本书进行经验串联，为人才的自我成长提供了良好的工具。

ROR 1.0发布至今的两年多时间里，推动ROR不断发展的源动力是热情高涨的ROR社区。本书的作者们就是来源于各个ROR中文社区，部分内容也与社区紧密相联，这种出书形式颇具创造力。在互联网时代读书，不仅要学会知识点，更要学会从社区解决问题的方法。

我始终认为，最有效的学习模式是师傅带徒弟，无论铁匠还是武林高手。但名师难求，而多位名师同时施教则更为难求。现在博文视点将这个行业里的名师都请到了，并且将各自的绝招秘籍出版成书，让得到名师变得容易。为知识的传承创造了一个新的模式。

生逢佳世，何其有幸！

蔡望勤

P1.cn

2008年6月于北京

Technorati : rubyonrails chinese book

Google Reader shared items [2008-08-13]

Wed, 13 Aug 2008 00:00:00 +0800

mysql里找出一个表的主键被谁作为外键约束
作者: hideto 链接：http://hideto.javaeye.com/blog/227595 发表时间: 2008年08月13日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

Google Reader shared items [2008-08-12]

Tue, 12 Aug 2008 00:00:00 +0800

Asynchronous DB: DBSlayer & HTTP
You hit a web 2.0 nerve and that magical 'viral coefficient' is working with full force, except now you' have a problem: scaling the database. No problem, you say, we have a few tricks up our sleeve: faster disks, loads of memory, dataset sharding,..

Interview with Jesse Cai(中文翻译)

Caiwangqin — Mon, 11 Aug 2008 16:03:43 +0800

Interview with Jesse Cai(中文翻译)

与蔡望勤的访谈录

I mentioned in my original article on working in beijingthat I would be chronicling a series of interviews with prominent Rails developers in China. The first person I was able to catch up with is Jesse Cai, founder of chinaonrails.com.

原文中曾提及在北京工作时，我会收录一系列与中国几位比较突出的Rails开发者的访谈。我有幸能够采访到的第一位就是chinaonrails.com的创始人 - 蔡望勤。

Tell us a little about your background (personal and technical)

I’m Jesse Cai, my chinese name is 蔡望勤 (Cai Wang Qin). I started programming in 1997 with Pascal, then Trouble C 2.0, and then 8086 assembly. I lived in southern China from 2001 to 2005, where I worked as a technical consultant for Cyberway, P&G. and made HRMS (human resources management systems) for Flextronics, AutoTec, and EuroTec. My previous experience includes ASP/PHP for 1 year, .NET for 1.5 years and Java for 2.5 years.

I started bloggingin July, 2005 and joined UUZone Inc. at the end of 2005, which was the biggest social networking site in China at the time.

Now i’m based in Beijing working for P1.cn, a fashion oriented social network focused on the emerging Chinese market. Of course, we’re using Rails.

请给我们介绍以下您的背景（个人及技术方面）

我是Jesse Cai，中文名叫蔡望勤。我最早接触编程是在1997年使用Pascal语言，之后依次使用过Trouble C 2.0以及8086 assembly。2001年至2005年，我住在中国南方，并为宝洁公司(P&G) ,Cyberway担任技术顾问。同时，为Flextronics，AutoTec和EuroTec编写了HRMS（人力资源管理系统）。我的个人经验还包括1年的ASP/PHP，1.5年的.NET和2.5年的Java编程。

我从2005年7月开始写博客。在2005年底，加入了当时中国最大的社交网络平台UUZone公司。

目前我住在北京，并在活跃在中国市场的时尚社交网络公司P1.cn工作，当然，我们使用的就是Rails。

How did you first happen onto Rails?

When i started working for UUZone at the end of 2005, many web2.0-type sites were emerging and many of them had cool mashup applications. We saw this as an opportunity to join the trend and give give our members the latest and greatest user experience. At the time, we were using Java, and thought that if we built our new mashup application in Java, it would take too long to release. So we thought about using another language or framework optimized for web/mashup development.

Since we were Java oriented, we first found Groovy. It’s a Java-based scripting language, and we can use our existing packages and code, so that seemed pretty cool. But Groovy at that time was 1.0 beta, and there were almost no production applications using Groovy. We used Groovy to prototype an internal version of Delicious for UUZone members, and we finished it in 1 week, so that’s how we got turned on to the rapid prototyping of scripting languages. We then wanted to use Groovy for larger applications, but it wasn’t ready for production. I even exchanged several emails with the Groovy PM and received very fast response. But we never stopped looking for better, simpler way for web development, which lead me to Grails 0.3. Nobody was using it at the time, but that was how I came across Ruby on Rails 0.6, from the Grails site. I watched the video and tried Rails and found it simple and fast enough. Many people said it has performance problem, so I did many performance tests myself and found the results adequate. So I implemented my first Rails app: a UUZone members/photos and Google Map Mashup. After we debuted our app to our members, it received very positive feedback and the project was a very big success. I loved programming like this, so I stuck with Rails ever since.

你最初是如何结识Rails的？

2005年底，在我刚开始为UUZone工作的时候，很多Web2.0类型的网站浮出水面，并带有很多很酷的Mashup程序。我们认为这是一个很好的机会进入到这股潮流中并给我们的会员带来最新最棒的用户体验。那时我们使用的是Java，觉得如果使用Java搭建我们的Mashup程序，会需要太长时间才能上线。所以我们考虑使用另外一种更优化的web/mashup开发语言或框架。

由于我们的技术是Java导向的，我们最先发现了Groovy。这是一种基于Java的编程语言，它支持我们现有的程序包和代码，看起来不错。Groovy在那个时候还处于1.0beta版，而且市面上几乎没有使用Groovy编写的程序产品。我们使用Groovy用1周时间内部编写了一套原型：Delicious for UUZone会员。这就是我们如何一步步转化到编程语言的快速成型。从那以后我们就考虑使用Groovy编写更大的程序，但从生产角度来看发现它并没有准备好。我甚至为此和Groovy的PM做过几次邮件交流，并得到了很快的回复。但我们并没有因此放弃寻找更好、更简便的网络开发方法。这把我带到了Grails 0.3。那时候并没有人使用它，但这恰恰让我从Grails网站结识了Ruby on Rails 0.6。我看了视频并试用了Rails，觉得它够简单够快。很多人说它工作有问题，所以我自己对其工作做了一系列测试，对结果还是比较满意的。于是我编写了我的第一个Rails程序：一个UUZone会员/照片和Google地图Mashup。在程序首次和会员见面后，得到了很好的凡响，项目非常成功。我非常喜爱这样的编程方式，所以从此就和Rails结下了不解之缘。

Being the creator of Chinaonrails.com, you have a good pulse on the Rails community in China. What are your general thoughts on Ruby/Rails in China?

I created ChinaonRails.com at the beginning of 2006. There were only two books for Ruby on Rals, one was Programming Ruby, another one was Agile Web Development with Ruby on Rails. There were no Chinese books at all, and no Chinese community for Rails. As you know, the best part of Rails is its community!

For Ruby, I think many (Chinese) people have prejudice against it. I don’t know if it’s because it came from Japan or what. Maybe the Chinese education is too focused on Microsoft technologies since they teach Windows in school. Not a lot of people know linux or open source very well. For Rails, there are two kinds of people who use it: one is a senior programmer, they were expert in Java or other language, and the other is a newbie. In China, there are two kinds of companies using Rails: one is outsource consultancy and the other is startups. I haven’t seen many traditional commercial companies using Rails in China, and so it’s a little bit hard to find good Rails developers. I gave a talk at Beijing Institute and Technology University for Rails. The students ddin’t seem very interested, i don’t know why.

Fortunately, the Rails community in China is still growing and more and more good people are starting to be more curious about it.

作为Chinaonrails.com的创始人，你应该非常了解Rails的中国社区。你对中国Ruby/Rails的大体想法是什么？

我在2006年初创建了ChinaonRails.com。那时只有两本关于Ruby on Rails的书籍，一个是Programming Ruby，另一个是Agile Web Development with Ruby on Rails。根本没有Rails的中文书籍和中文社区。你知道的，Rails最好的部分就是它的社区。

我认为很多（中国）人对Ruby存在偏见。我不知道是不是因为它源于日本。也许中国式教育太专注于微软科技，他们在学校都教Windows。没有很多人知道或了解Linux和开源。有两种人群使用Rails：一个是高级编程人员，他们在Java或其它语言上是专家。另一种人群就是初学者。在中国有两种公司使用Rails：一些是外源咨询公司，另一些是刚起步的。我还没有看到多少中国传统商业公司使用Rails，因此找到好的Rails开发者是比较困难的。我曾在北京理工大学针对Rails做过一次讲义。不知道为什么，学生们并不是很感兴趣。

Why hasn’t Rails taken off in China as much as the US or Europe?

As i said, not so many people know it. I think another big reason is there was no organization to push Rails in China. Is US and Europe, there are many RailsConfs, barcamps, but not in China. And the final reason is how do people make money using Rails in China?

为什么Rails在中国还未像在美国欧洲那样普及？

就像我说的，很多人都不知道Rails。而且另外一个主要原因是没有一个组织推进Rails在中国的发展。在欧美有很多RailsConfs和barcamps，但是在中国就没有。还有最后一个原因就是大家如何在中国通过Rails赚钱？

What blogs or podcasts are you a fan of?

Many, I have more than 100 ruby on rails feeds in Google Reader. I especially like peepcode podcasts and Railscasts. I’m learning so many things through blogs and podcasts.

你对什么博客或播客感兴趣？

很多，我在Google Reader有过100的回复。我特别钟爱peepcode播客和Railscasts。我从博客和播客学到了很多东西。

Who would you like to buy a beer for in the Chinese Ruby/Rails community?

bd7lx, he is a hero in the Ruby/Rails community in China. He always brings Ruby/Rails news to the Chinese community, and answers questions frequently.

在中国Ruby/Rails社区你会请谁喝啤酒？

bd7lx, 他是中国Ruby/Rails的英雄人物。他总会给中国社区带来Ruby/Rails的最新消息，并积极答疑。

Who would you like to buy a beer for outside of China?

Hmm, the first guy of course is DHH, but probably many people buy beers for him, so I will take someone else . There’s Jason from http://railsenvy.com, Ilya Grigorik from http://igvita.com, Josh Susser from http://blog.hasmanythrough.com, anyone from http://www.engineyard.com, I may need help from them soon, and you - you help bridge the Rails communities in China and English speaking world.

在中国以外的地区你会请谁喝啤酒？

恩… 第一个人当然是DHH，不过估计很多人都会给他买啤酒，所以我还是选别人吧 :)。有一个来自http://railsenvy.com的Jason，来自http://igvita.com的Ilya Grigorik，来自http://blog.hasmanythrough.com的Josh Susser，任何来自http://www.engineyard.com的人，我可能都会很快需要他们的帮助，还有你 - 你帮我为Rails中国社区和英语国家建起了桥梁。

Google Reader shared items [2008-08-11]

Mon, 11 Aug 2008 00:00:00 +0800

Erlang基于Socket实现简单聊天室
作者: hideto 链接：http://hideto.javaeye.com/blog/226639 发表时间: 2008年08月11日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

Google Reader shared items [2008-08-08]

Fri, 08 Aug 2008 00:00:00 +0800

最简单的Erlang Socket程序
作者: hideto 链接：http://hideto.javaeye.com/blog/225786 发表时间: 2008年08月08日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

Google Reader shared items [2008-08-07]

Thu, 07 Aug 2008 00:00:00 +0800

memcached1.2新增启动参数初探
memcached 1.2新增加了几个参数，试着做下总结，有错误请指正： -U <num> 监听UDP端口，默认是11211端口 -f <factor> 这个参数很重要，用于设置chunk大小的递增因子。memcached的存储模型类似一个二维数组：slab->chunk->item，每个slab大..
Interview with Jesse Cai
I mentioned in my original article on working in beijing that I would be chronicling a series of interviews with prominent Rails developers in China. The first person I was able to catch up with is Jesse Cai, founder of chinaonrails.com. Tell us..
The case for a nonblocking Ruby stack
In a previous post I talked about the problems that plauge the web based Ruby applications regarding processor and memory use. I proposed using non-blocking IO as a solution to this problem. In a follow up post I benchmarked nonblocking vs blocking..

Google Reader shared items [2008-08-03]

Sun, 03 Aug 2008 00:00:00 +0800

Ruby Fibers Vs Ruby Threads
Ruby 1.9 Fibers are touted as lightweight concurrency elements that are much lighter than threads. I have noticed a sizbale impact when I was benchmarking an application that made heavy use of fibers. So I wondered what If I switched to threads ins..

Google Reader shared items [2008-08-02]

Sat, 02 Aug 2008 00:00:00 +0800

Solving permission problem of apache+mod_rails on leopard
OK, this is not about the details of how to install mod_rails on leopard, actually the process is pretty straightforward and there are already some good document on mod_rails’ website . Well, the confusing part of using mod_rails+apache on leopar..

Redmine is really good project management web application

Caiwangqin — Mon, 28 Jul 2008 19:52:16 +0800

Redmine is very easy to setup and powerful right now, include many useful component for Agile software development team. like Wiki, Bug tracker, SCM and Forum.

Ruby on Rails is great! to setup redmine, just need svn checkout, see Installing Redmine.

I used trac two years ago, which is so complicate setup and use. It’s time to switch to Redmine, i’m sure you will love it.

Technorati : Redmine ROR

Google Reader shared items [2008-07-28]

Mon, 28 Jul 2008 00:00:00 +0800

如何采访Ruby/Rails大牛
互联网让记者这个职业变得没有门槛，只要愿意，任何人都可以成为网络记者，尤其是网络技术记者，你甚至都不需要与采访人见面，只需准备一些问题，然后去封邮件就OK了，当然被采访人一般都会很繁忙，因此要让你的邮件脱颖而出得到回答，你就需要多提些有趣的问题，没有..

Google Reader shared items [2008-07-23]

Wed, 23 Jul 2008 00:00:00 +0800

Ruby写Servlet的小例子
Ruby也能写servlet?是的，没开玩笑，而且挺方便的，因为Ruby的标准库就自带了一个webrick，webrick本身又有一个serlvet容器，随时随地启动一个web server，实在是很方便。先看个最简单的例子，输出hello到浏览器： require 'webrick' require 'net/h..

Google Reader shared items [2008-07-22]

Tue, 22 Jul 2008 00:00:00 +0800

Unix Signals for Live Debugging
It's unit tested, the integration and regressions tests are all green, you even added a set of performance benchmarks, and yet after a couple of hours of production use the process is falling over - we've all been there before. Good instrumentation..

Google Reader shared items [2008-07-21]

Mon, 21 Jul 2008 00:00:00 +0800

Nginx Upload Module
Valery Kholodkov has written a very cool nginx module for handling uploads. The way this works is that you specify a location block to handle the uploads. So if you are using the standard nginx.conf for rails apps then you would add this in your..

Facebook 开放平台源码

Caiwangqin — Fri, 18 Jul 2008 15:03:09 +0800

开放平台源码了, 虽然不是全部, 但已经相当多了. 在这里可以下载 Facebook 平台.

这个周末开始学习研究.

BTW:

Is this open social or open platform? I don’t know.

Is NCP2.0 open platform? No, it isn’t.

Technorati : facebook opensource

Google Reader shared items [2008-07-17]

Thu, 17 Jul 2008 00:00:00 +0800

Meebo To Turn On Chat For Communities
Instant messaging service Meebo announced a new product tonight called community Instant Messaging that will effectively provide “instant messaging in a box” to any site with a community. It will be a federated system, which means users can acces..

Google Reader shared items [2008-07-15]

Tue, 15 Jul 2008 00:00:00 +0800

Rails HTTP Status Code to Symbol Mapping
Recently I had been wondering what the complete list of HTTP status code symbols was in Rails. Searching through Rails didn't yield any results for a symbol like :unprocessable_entity. Digging around in the Rails source code I found the file action..

We do scrum

Caiwangqin — Mon, 14 Jul 2008 14:04:25 +0800

What’s scrum?
http://www.infoq.com/cn/minibooks/scrum-xp-from-the-trenches

使用RubyonRails建设积木式网站架构与部署

Caiwangqin — Wed, 02 Jul 2008 17:52:19 +0800

如图所示，在中间的 Application 层，在不同的时间段，我们使用了不同版本的 Rails 开发了不同的功能模块。虽然 best practices 是将 Rails 版本 update to date , 但实际工作中可能由于具体业务使用了特定的部件使 update to date 变得不太容易。当新的Rails版本出来后，开发新的一个功能时，我们也不希望继续在旧的Rails版本上开发，于是我们采用了如图所示的积木式网站架构。

附 Nginx 的部署方式如下，以下示例中 app1,app2 使用 Rails1.2.3, app3 使用 Rails2.1, 启动 app3 的 mongrel 需要使用 prefix 选项：

mongrel_rails mongrel::start --prefix /app3 -p 5001 mongrel_rails mongrel::start –prefix /app3 -p 5002

nginx.conf:

user www; worker_processes 1; events { worker_connections 1024; } http { include mime.types; upstream mongrel_cluster1 { server 127.0.0.1:3001; server 127.0.0.1:3002; } upstream mongrel_cluster2 { server 127.0.0.1:4001; server 127.0.0.1:4002; }

upstream mongrel_cluster3 { server 127.0.0.1:5001; server 127.0.0.1:5002; } server { listen 127.0.0.1:80 default deferred; location /app1/ { proxy_pass http://mongrel_cluster1/; } location /app2/ { proxy_pass http://mongrel_cluster2/; }

location /app3/ { proxy_pass http://mongrel_cluster3/app3/; } } }

Ruby on Rails 2.1更新了什么？

Caiwangqin — Fri, 20 Jun 2008 10:04:33 +0800

这是的来自ChinaonRails.com社区对Ruby on Rails 2.1, What’s New?的中文翻译版本。点击这里下载.

译序：

Rails2.1发布已经有段时间了，我们都是零零碎碎的看到一些新功能介绍文章，且基本上都是英文的，中
文资料不多，仅有一些比较零碎的片段，看到《Ruby On Raisl 2.1,what’s new》(Second Edition),大
致的翻了一遍，发现其介绍的比较全面和具体，邀请一些Railser一起翻译成中文版本，望此文档能带给大
家有用的信息，如果您发现有不妥的地方，欢迎指出，同时也希望有时间、愿意贡献的朋友一起加入，后续会再翻译其他的书籍！

英文PDF：
http://www.nomedojogo.com/livro/carlosbrando-rubyonrails21_en.pdf
发起地址：
http://chinaonrails.com/topic/view/1713.html

Google Reader shared items [2008-06-19]

Thu, 19 Jun 2008 00:00:00 +0800

Splunk Your Distributed Logs in EC2
Managing log files is like herding cats, except its worse: a typical LAMP / Rails stack will easily generate a dozen logs in different locations. The fun part is, of course, the debugging and server administration tasks which involve the forensic ..

Hello Ruby on Rails 2.1

Caiwangqin — Thu, 12 Jun 2008 18:23:06 +0800

we start to use Ruby on Rails 2.1 for new features of P1.cn, Eg. P1 Groups.

here is one book about what’s new in rails 2.1 in Portuguese, the English translation from the Brazilian community united, Click here to download.

Talk.org, a better, lightly, google account integration Twitter.

Caiwangqin — Wed, 11 Jun 2008 11:03:12 +0800

《程序员》06期：2008开源在中国 - 敏捷与性能的博弈

Caiwangqin — Fri, 06 Jun 2008 19:09:44 +0800

应程序员杂志技术编辑 zhaojp 的约稿，从敏捷和性能两方面，结合这一年时间以来 P1.cn 网站建设实践，和大家做了一下ROR开发经验分享。

文章发布在《程序员》2008年06期技术专栏，标题为《敏捷与性能的博弈–Ruby on Rails Web developement》。

Google Reader shared items [2008-06-06]

Fri, 06 Jun 2008 00:00:00 +0800

JS Routes plugin
Here's a little plugin to make working with Rails routing in Javascript easier. It generates jsroutes.js each time your app starts, which allows you to use routes like so: 1 JSRoutes.get('users_path()') 2 // returns: /users 3 4 ..

从 svn 到 git

Caiwangqin — Thu, 05 Jun 2008 14:31:15 +0800

安装 git：

Linux:

sudo apt-get install git-svn

Windows:

http://code.google.com/p/msysgit/

创建Git Repository

1.在本地创建

mkdir new_repository

cd new_repository

git init-db

2.从已存在的Repository获取

git clone /path/to/exist/repository

3.在远程服务器上创建bare repository

$ ssh myserver.com
Welcome to myserver.com!
$ mkdir /var/git/myapp.git && cd /var/git/myapp.git
$ git –bare init
Initialized empty Git repository in /var/git/myapp.git
$ exit
Bye!

4.在本地添加远程repository并push

$ cd ~/Sites/myapp
$ git remote add origin ssh://myserver.com/var/git/myapp.git
$ git push origin master

5.使用ssh从远程服务器上获取文件

git clone ssh://user@myserver.com/var/git/myapp.git

添加文件

git add /path/to/filename # 添加单个文件

git add filename [filename] # 添加多个文件

git add /path/to/directory # 添加文件夹

git add ./ # 添加当前文件夹

提交文件

1.提交本地更新

git commit -m “commit message is here”

OR

git commit -a -m “commit message is here”

2.提交更新至远端

git push /path/to/repository

更新文件

1.更新本地工作目录文件

git checkout -f

2.更新远端文件

git pull /path/to/repository

创建分支

创建自己的工作分支,以避免对Master Branch 的影响

      git branch raecoo   # 成功创建了名为raecoo的分支



      git checkout raecoo # 将当前工作切换至raecoo分支

删除分支

git-branch -D branch-name 合并分支 git checkout master # 切换当前分支到master git merge “merge message is here” HEAD raecoo # 将raecoo分支与master分支合并 OR git checkout master #效果与上相同 git pull . raecoo 参考： http://www.robinlu.com/blog/archives/191 http://www.robinlu.com/blog/archives/194 http://toolmantim.com/article/2007/12/5/setting_up_a_new_remote_git_repository

Google Reader shared items [2008-06-04]

Wed, 04 Jun 2008 00:00:00 +0800

将gem变成plugin
作者: hideto 链接：http://hideto.javaeye.com/blog/200032 发表时间: 2008年06月04日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

Google Reader shared items [2008-06-03]

Tue, 03 Jun 2008 00:00:00 +0800

在Rails里使用ReCaptcha添加验证码
作者: hideto 链接：http://hideto.javaeye.com/blog/199757 发表时间: 2008年06月03日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

[P1.cn] 欢迎 Raecoo 加入 P1.cn 团队

Caiwangqin — Mon, 02 Jun 2008 13:48:54 +0800

Raecoo:

http://www.quannei.com

http://www.8ending.com

http://actsasmessages.googlecode.com

从今天起，P1.CN 开发团队又增加了1名Ruby on Rails Developer。P1 Groups 即将推出，敬请期待更精彩的P1, 更稳定的服务。

来自 HiPiHi 和 Novoking 的糟糕虚拟世界体验

Caiwangqin — Sat, 31 May 2008 15:54:37 +0800

又看到Tangos写了一篇关于Virtual World的Blog，于是心血来潮试用了一下虚拟世界Hipihi和Novoking. 体验不是一般的差。

下载安装了HiPiHi_world_50021，进入后不能容忍粗劣的画面和慢动作。找了一圈只发现有17个人在线（周六下午），根本找不到人交流。于是退出并卸载了程序。

Novoking 0.94 beta 版的画面和行走体验都要HiPiHi好多了，登录后，穿着短库在里面跑了5分钟，终于找到了时装店，由于操作的不灵便，花了15分钟才晕晕的买到一身服装。里面也就没人可以交流。

而我之前体验过网络游戏，几乎任何一款网游都比Hipihi和Novoking做得要好，不管是人物的移动和画面的美观。

与其说 Hipihi 和 Novoking 是Web 2.0的社区，不如说是只有粗糙场景的3D游戏雏形。我本人非常看好这一类的社区产品，希望他们哪家能做好了，于是我到虚拟世界里去开个烤鸭店，或在Virtual World里卖麦当劳，然后送到现实人的手中，岂不是很好玩？

然而现在显然不行，还是要先做好产品。产品不好，再多的软文行销也是没用的。

Google Reader shared items [2008-05-29]

Thu, 29 May 2008 00:00:00 +0800

Ajax Rating: 简易打分插件
刚完成的一个小插件，比较粗糙，欢迎多提意见。安装 $ ./script/plugin install http://svn.elctech.com/public/plugins/ajax_rating 使用在你要评分的model中添加acts_as_ratable，比如post： class Post < ActiveRecord::Base acts_as_ratable end 这为..

Looking for UI web-graphics Designer

Caiwangqin — Thu, 22 May 2008 18:54:36 +0800

UI web-graphics Designer
P1.CN is looking for an experienced UI web-graphics designer to work in a key position of the product design. You are required to design pages from function specifications and prototypes. The position is full-time in our main office at the 28th floor of Chaowai SOHO Tower, Beijing.

Responsibilities

* Design webpages from function specification and/or prototypes/sketches
* Develop, implement and extend style guidelines
* Keep pages on pixel perfection
* Facilitate the user experience

Requirements

* 3+ years experience working in a related field
* Understand the product and its goals
* Understand the users thoughts & needs on a design level
* Sketch drawing
* Expertise in Photoshop
* Expertise in any webeditor available (such as Dreamweaver, Namo, etc.)
* Deep understanding of the social networking space
* Good understanding of written and spoken english
* Ability to handle the pressure and fluidity of a start-up environment
* Extremely detail oriented down to pixel-perfect implementation

Bonus points

* Active in the design community
* Experience with Illustrator, InDesign
* Knowledge of web-programming is welcome (RubyOnRails, PHP, etc.)
* Knowledge in XHTML, CSS

Contact

Email a@p1.cn
Skype: alexander.frederiksen

Google Reader shared items [2008-05-22]

Thu, 22 May 2008 00:00:00 +0800

MySQL内建Function
作者: hideto 链接：http://hideto.javaeye.com/blog/195747 发表时间: 2008年05月22日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律责任！ ..

Google Reader shared items [2008-05-19]

Mon, 19 May 2008 00:00:00 +0800

使用Rails构建一个社会化网络站点
作者: hideto 链接：http://hideto.javaeye.com/blog/194245 发表时间: 2008年05月19日声明：本文系JavaEye网站发布的原创博客文章，未经作者书面许可，严禁任何网站转载本文，否则必将追究法律..

Good by Jianwai SOHO, Hello Shaowai SOHO.

Caiwangqin — Fri, 16 May 2008 16:59:52 +0800

Our company has been moved to Shaowai SOHO from Jianwai SOHO yesterday.

We have stayed in Jianwai SOHO for 16 months.

We are in Shaowai SOHO from now on.

New Office, New P1.cn !

Google Reader shared items [2008-05-15]

Thu, 15 May 2008 00:00:00 +0800

新部署时代
从上一次写通过capistrano来部署Ruby On Rails应用,居然已经是一年九个月以前了,在这段时间里,Ruby On Rails,Capistrano都有着不小的进步和变化,git慢慢开始取代svn成为大家首选的SCM.与时俱进,来看看如何用Capistrano 2.3配合git和ssh来部署Ruby On Rails + Mongrel..

Try FiveRuns Manage 2.0

Caiwangqin — Wed, 14 May 2008 15:25:52 +0800

Server stat:

Linux p1 2.6.24-1-amd64
Nginx 0.5.35
ruby 1.8.6 (2008-03-03 patchlevel 114)
rails 1.2.3
mongrel (1.1.4)

Try progress:

Sign up an account for FiveRuns Manage
Install fiveruns_manage client on Deban sarge

$ wget http://manage.fiveruns.com/system/downloads/client/manage-installer-linux-ubuntu-64bit-intel.sh
$ sudo sh manage-install-linux-distro-xbit-intel.sh
click “I’ve Finished the Installation” in FiveRuns Manage dashboard, pick up which Subsystems & Applications should be monited.
get report
wow, the Interactive Metric Graphs is really cool!

Google Reader shared items [2008-05-13]

Tue, 13 May 2008 00:00:00 +0800

Load Balancing & QoS with HAProxy
A brand new Rails/Merb app you put together over a weekend, a pack of Mongrels, a reverse proxy (like Nginx), and you're up and running. Well, almost, what about that one request that tends to run forever, often forcing the user to double check th..

Google Reader shared items [2008-05-05]

Mon, 05 May 2008 00:00:00 +0800

监测可能发送syn flood攻击的IP，并自动封IP的脚本
简单思路，使用 netstat 命令找出含有SYN状态的连接IP，找出其中可能是攻击的IP，再用 iptables 或 shorewall 封掉，写入日志文件。可以把它加入到 crontab job 中，每1分钟或每5分钟运行一次。下载地址： http://www.cnzxh.net/blog/files/6_1209873391_denyip.rb...

使用 hdparm 测试硬盘速度

Caiwangqin — Tue, 29 Apr 2008 19:15:41 +0800

使用 hdparm 测试硬盘速度：

hdparm 是linux 测试硬盘及改变硬盘设定的指令

#hdparm -t /dev/hda < - - - 测试硬盘/dev/hda 的速度

如果是scsi 的话/dev/sda , /dev/sdb

#hdparm -c 1 /dev/hda < - - - 开启ide 硬盘的32bit

#hdparm -d 1 /dev/hda < - - - 开启dma mode

这样再次的测试你的硬盘就可以发现你的硬盘便快了

以下是我对三台安装 Debian 操作系统的计算机所做的测试结果：

1×250Gb STAT PC

# hdparm -t /dev/sda2

/dev/sda2:
Timing buffered disk reads: 264 MB in 3.01 seconds = 87.60 MB/sec

2×140Gb SCSI RAID1

# hdparm -t /dev/md0

/dev/md0:
Timing buffered disk reads: 226 MB in 3.02 seconds = 74.83 MB/sec

# hdparm -t /dev/md2

/dev/md2:
Timing buffered disk reads: 208 MB in 3.02 seconds = 68.97 MB/sec

4×1Tb STAT ES.2 RAID5

# hdparm -t /dev/sda1

/dev/sda1:
Timing buffered disk reads: 226 MB in 3.01 seconds = 75.00 MB/sec
# hdparm -t /dev/sdb1

/dev/sdb1:
Timing buffered disk reads: 344 MB in 3.03 seconds = 113.71 MB/sec
# hdparm -t /dev/sdb2

/dev/sdb2:
Timing buffered disk reads: 318 MB in 3.02 seconds = 105.32 MB/sec

Switch Rails cache files from file_store to ramfs_store

Caiwangqin — Fri, 25 Apr 2008 15:30:40 +0800

we found the problem of my last post, like this post, Innodb Locks cause something else spend long time in transaction.

It is expire_action from disk in our case. we used action_cache plugin in rails application, we have multiple languange versions of zh and en, so we write expire_reg_action to expire both cache when content after_save, this will spent long time when delete cache from huge files.

so we switch Rails cache files from file_store to ramfs_store temporary, it works perfect right now.

mount -t ramfs ramfs /home/yay/rails_app/current/tmp/cache

reference :