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搭建高可用mongodb集群(二)—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...就算一个副本挂掉了还有很多副本存在,并且解决了上面第一个问题“主节点挂掉了,整个集群内会自动切换”。难怪mongoDB官方推荐使用这种模式。我们来看看mongoDB副本集的架构图:
由图可以看到客户端连接到整个副本集,...
Refresh image with a new one at the same url
...g the use of stale script or css files, or perhaps even refreshing updated PDF documents (using (4) only if set up to open in-browser). Method (4) might require some changes to the above javascript, in these cases.
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C++ performance vs. Java/C#
...ources:
https://days2011.scala-lang.org/sites/days2011/files/ws3-1-Hundt.pdf
http://www.computing.co.uk/ctg/news/2076322/-winner-google-language-tests
Edit (2011-09-20)
"The going word at Facebook is that 'reasonably written C++ code just runs fast,' which underscores the enormous effort spe...
Polymorphism in C++
... of more than one type." (from lucacardelli.name/Papers/OnUnderstanding.A4.pdf). So, the question is "who speaks for Comp. Sci"...?
– Tony Delroy
Jun 27 '11 at 9:09
...
Relational table naming convention [closed]
...ntly on different browsers; so you will have to click the links.
Note that PDF files have full navigation, so click on the blue glass buttons, or the objects where expansion is identified:
Readers who are unfamiliar with the Relational Modelling Standard may find the IDEF1X Notation helpful.
Orde...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...更确切的说是定时功能),总是把一个io_service对象作为他的第一个构造函数,而第二个构造函数的参数设定timer会在5秒后到时(expired).
boost::asio::deadline_timer t(io, boost::posix_time::seconds(5));
这个简单的示例中我们演示了定时器上的一...
【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...有可能导致单个链表的上有很多socket,导致查询慢
添加第二个hash表,使用地址和端口作为key, 来应对上述情况。 查询的时候只用查两个hash链表中较短的那个。
udp sencondary hash
connect()
sys_connect()->inet_dgram_connect()->ip4_datagram_c...
What optimizations can GHC be expected to perform reliably?
...ally free.
This comes from
community.haskell.org/~simonmar/papers/inline.pdf
which includes a lot more information about inlining.
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...和一个数字表示。一般来说,一款同样规模的微处理器的第一个版本是A0,如果改进了设计,则可以通过改变字母或者数字进行标识,如果仅仅改变数字(比如改成A3),说明进行了一些辅助的改进,如果字母和数字都改变,说...
The definitive guide to form-based website authentication [closed]
...f external resources
Dos and Don'ts of Client Authentication on the Web (PDF)
21 page academic article with many great tips.
Ask YC: Best Practices for User Authentication
Forum discussion on the subject
You're Probably Storing Passwords Incorrectly
Introductory article about storing passwords...
