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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
...。
迁移工作需要导入旧数据。MongoDB本身有一个mongoimport工具可供使用，不过它只接受json、csv等格式的源文件，不适合我的需求，所以我没用，而是用PHP写了一个脚本，平稳运行了一段时间后，我发现数据导入的速度下降了，同...
Where is Erlang used and why? [closed]
...It has to route many messages simultaneously, and handle many a lot of TCP/IP connections.
So we have 2 features:
handle many connections
route messages given some aspects of the message
These are examples where erlang shines.
handle many connections
It is very easy to build scalable non-bloc...
PDB文件：每个开发人员都必须知道的 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的。对于public builds，在运行source indexing tool后，版本控制工具将代码存储到你设置的代码cache中。对于private builds，只是存储了PDB文件的全路径，例如在c:\foo下的源文件mycode.cpp，在pdb文件中存储的路径为c:\foo\mycode.cpp。对于private ...
Can I run multiple programs in a Docker container?
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There can be only one ENTRYPOINT, but that target is usually a script that launches as many programs that are needed. You can additionally use for example Supervisord or similar to take care of launching multiple services inside single container. This is an example of a docker container run...
C语言之父辞世引发“分号”悼念 - 创意 - 清泛网 - 专注C/C++及内核技术
...ultics项目调整过程中，就迫切需要一门高级计算机语言做工具，为了解决程序的可移植性问题，肯·汤普逊和丹尼斯·里奇决定对它进行简单改进，形成 NB语言。但NB在Unix的移植方面依然不尽人意，此后里奇又对NB语言做了改进，...
Using a remote repository with non-standard port
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How can this be done if I have an IP and not a host name? I ask because we haven't linked our host name to our ip yet.
– ThisIsNotAnId
Feb 22 '19 at 23:14
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How do I increase the RAM and set up host-only networking in Vagrant?
...nage-modifyvm
The vagrant documentation has the section on how to change IP address:
Vagrant::Config.run do |config|
config.vm.network :hostonly, "192.168.50.4"
end
Also you can restructure the configuration like this, ending is do with end without nesting it.
This is simpler.
config.vm.defi...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...明，都是将socket称作"套接字"，也就是对底层tcp/ip的一种封装，所以要想真正理解socket的原理，就得去深入理解tcp/ip实现网络通信的机制，这属于计算机网络这块的东西，与实际的编程没有太大的关联，这里就不深入说明...
How to RSYNC a single file?
...e:
rsync -avz --progress /var/www/public_html/.htaccess root@<remote-ip>:/var/www/public_html/
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App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
.../CloudDB 都是"拉"模式，NotificationStyle 只是本地通知工具。
但通过开发扩展组件完全可以实现。推荐路线是开发极光推送扩展（方案 B），这是最实用的方案，能在国内环境下正常工作。开发量约 2-3 周。
七、对用户...