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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

记一次MongoDB性能问题最近忙着把一个项目从MySQL迁移到MongoDB,在导入旧数据的过程中,遇到了些许波折,犯了不少错误,但同时也学到了不少知识,遂记录下来。公...最近忙着把一个项目从MySQL迁移到MongoDB,在导入旧数据的过...
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How to discover number of *logical* cores on Mac OS X?

...he command line, how many cores are on the machine when you're running Mac OS X? On Linux, I use: 14 Answers ...
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How to check if running in Cygwin, Mac or Linux?

...ing to the very helpful schot (in the comments), uname -s gives Darwin for OSX and Linux for Linux, while my Cygwin gives CYGWIN_NT-5.1. But you may have to experiment with all sorts of different versions. So the bash code to do such a check would be along the lines of: unameOut="$(uname -s)" case...
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Failed to load the JNI shared Library (JDK)

... You need a 64-bit trio: 64-bit OS 64-bit Java 64-bit Eclipse share | improve this answer | follow | ...
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C++读写EXCEL文件方式比较 - C/C++ - 清泛网 - 专注C/C++及内核技术

...E的方式 这个大约是最常用的方式,这个方式其实启动了一个EXCEL的进程在背后读写EXCEL文件,这个方式的最大好处是什么事情都能做。包括设置EXCEL的格式,增加删除Sheet,读写单元格,等等。功能几乎是最全的,而且使用起来...
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CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... Server,其功能就是代理网络用户去取得网络信息。Squid是一个缓存Internet 数据的软件,其接收用户的 一、简介 代理服务器英文全称是Proxy Server,其功能就是代理网络用户去取得网络信息。 Squid是一个缓存Internet 数据的软件,...
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postgresql port confusion 5433 or 5432?

I have installed postgresql on OSX. When I run psql, I get 7 Answers 7 ...
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XP风格按钮的实现 - C/C++ - 清泛网 - 专注C/C++及内核技术

...程目录下的.clw文件删除,重新打开工程,为对话框添加一个按钮。通过类向导为此按钮控件添加一个变量,变量类型选择CXPButton; (在此步骤中如果不删除.clw文件,则在选择变量类型的时候下拉列表中不会出现CXPButton选项,...
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致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术

...。而我当年也有他们的困惑。虽然自己也还年轻,但作为一个阶段告以段落的“过来人”,还是想写点东西给“年轻人”。 关于如何成长? 我直白的答案还是建议通过实践,通过项目来成长。虽然提倡多参加项目,但项目不...
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How to get file creation & modification date/times in Python?

... Getting some sort of modification date in a cross-platform way is easy - just call os.path.getmtime(path) and you'll get the Unix timestamp of when the file at path was last modified. Getting file creation dates, on the other hand, is fiddly and platform-dependent, diff...