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企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，如浏览网站的产品列表，那么很显然单个服务实例已经无法支持该网站的运营。在这种情况下，我们就需要对该服务进行扩容。
扩容主要分为Scale Up和Scale Out两种，分别对应着增强单个服务的服务能力以及增强服务数量。在...
How do I fix PyDev “Undefined variable from import” errors?
...ncing the same issue with latest Eclipse and PyDev. I can navigate between all modules, so why code-analysis can't do the same?
– Adam
Sep 3 '14 at 11:41
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Separation of business logic and data access in django
...de is confusing and, after a certain time, I cease to understand what is really happening.
10 Answers
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How can I make the cursor turn to the wait cursor?
... it takes a little while to do. How can I display the Wait/Busy Cursor (usually the hourglass) to the user to let them know the program is doing something?
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Is there some way to PUSH data from web server to browser?
...otifications so be aware of the performance implications when writing your app.
http://en.wikipedia.org/wiki/Comet_(programming)
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How can I load storyboard programmatically from class?
... xib . But I can't find proper way to load and show storyboard programmatically. Project was started developing with xib, and now it's very hard to nest all xib files in storyboard. So I was looking a way to do it in code, like with alloc, init, push for viewControllers. In my case I have only one...
Approximate cost to access various caches and main memory?
...xample, check page 22 for some timings & cycles for example).
Additionally, this page has some details on clock cycles etc. The second link served the following numbers:
Core i7 Xeon 5500 Series Data Source Latency (approximate) [Pg. 22]
local L1 CACHE hit, ...
How to set default values in Rails?
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"Correct" is a dangerous word in Ruby. There's usually more than one way to do anything. If you know you'll always want that default value for that column on that table, setting them in a DB migration file is the easiest way:
class SetDefault < ActiveRecord::Migration
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Can someone explain Microsoft Unity?
...). I'm familiar with the MVPC pattern (we use it here), but I just can't really grasp this Unity thing yet, and I think it's the next step in our application design.
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关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...动力，可能在大多数的人眼里，php是专为web而生，做wep app是一流的快速好用，并极易简单和容易上手，做起web所需的各项功能可能是分分钟搞定，然后做socket了？可能就觉得不屑一顾了，好像是不务正业，用了自己的短板去做...