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HAproxy - Web负载均衡解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...务器负载很高的时候，自动结束掉当前队列处理比较久的链接
option dontlognull
# 启用该项，日志中将不会记录空连接。所谓空连接就是在上游的负载均衡器或者监控系统为了探测该服务是否存活可用时，需要定期的连接或...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...繁的系统调用。
ptmalloc 将相似大小的 chunk 用双向链表链接起来, 这样的一个链表被称为一个 bin。Ptmalloc 一共 维护了 128 个 bin,并使用一个数组来存储这些 bin(如下图所示)。
数组中的第一个为 unsorted bin, 数组中从 2 开始编号...
How to backup a local Git repository?
...ay I do this is to create a remote (bare) repository (on a separate drive, USB Key, backup server or even github) and then use push --mirror to make that remote repo look exactly like my local one (except the remote is a bare repository).
This will push all refs (branches and tags) including non-f...
Streaming a video file to an html5 video player with Node.js so that the video controls continue to
...M and the content size is around 200GB (which will be on removable media - USB attached.) Even something like the Clear Key algorithm with EME would be okay - except for the problem that chromium does not have EME built into it on the ARM. Just that the removable media by itself should not be enough...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...侧面板的底部，打开“扩展”类别。
单击“导入扩展”链接。
选择您上面下载的 aix 文件，然后单击“导入”按钮。
等待几秒钟，您应该会看到一条消息，提示扩展已导入。您还应该看到 SQLite 扩展出现在“扩展”类别中...
R and version control for the solo data analyst
...ork from machine to machine without worrying about things like losing your USB drive.
2 What are the main pros and cons of adopting version control?
The only con I can think of is a slight increase in file size- but modern version control systems can do absolutely amazing things with compressi...
Add Keypair to existing EC2 instance
...mputer sitting at your desk, you could simply boot the system with a CD or USB stick, mount the hard drive, check out and fix the files, then reboot the computer to be back in business.
A remote EC2 instance, however, seems distant and inaccessible when you are in one of these situations. Fortunate...
C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
...微博上，看到@Laruence同学出了一个关于C语言的题，微博链接。微博截图如下。我觉得好多人对这段代码的理解还不够深入，所以写下了这篇文章。
为了方便你把代码copy过去编译和调试，我把代码列在下面：
1
2
...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...式输出出去，这是什么问题呢？
由于还不熟悉调试动态链接库，所以
我只是找到了printf的源代码的这里
声明部分：
int pos =0 ,cnt_printed_chars =0 ,i ;
unsigned char *chptr ;
va_list ap ;
%s格式控制部分：
case 's'...
使用Activity启动器组件 · App Inventor 2 中文网
...原始应用程序，并由它们启动。
ActivityStarter 组件文档的链接提供了有关 Activity Starter 组件属性、事件和方法的附加信息。
要使用 Activity Starter 启动应用程序，你必须向 Android 操作系统提供某些控制信息。 你可以通过在调用 Ac...