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新浪是如何分析处理32亿条实时日志的? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...闭swap,调整max open files等;App Level的优化如Java运行环境本的选择,ES_HEAP_SIZE的设置,修改bulk index的queue size等,另外还设置了默认的index template,目的是更改默认的shard,replica数并将string改为not_analyzed,开启doc_values以应对elasti...
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How to open every file in a folder?

... This opens, prints, closes every PDF in a directory using PyPerClip and PyAutoGui. Hope others find this helpful. – RockwellS Jun 8 '18 at 22:09 ...
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Algorithm to return all combinations of k elements from n

...Eades, Hickey, Read Adjacent Interchange Combination Generation Algorithm (PDF, with code in Pascal) Combination Generators Survey of Combinatorial Gray Codes (PostScript) An Algorithm for Gray Codes Chase's Twiddle (algorithm) Phillip J Chase, `Algorithm 382: Combinations of M out of N Objects' ...
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Forward declaring an enum in C++

... proposal at http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf share | improve this answer | follow | ...
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Explaining Apache ZooKeeper

... resources: The paper: https://pdos.csail.mit.edu/6.824/papers/zookeeper.pdf The lecture offered by MIT 6.824 from 36:00: https://youtu.be/pbmyrNjzdDk?t=2198 I would suggest watching the video, read the paper, and then watch the video again. It would be easier to understand if you know Raft befo...
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What are Runtime.getRuntime().totalMemory() and freeMemory()?

.../www.oracle.com/technetwork/java/javase/memorymanagement-whitepaper-150215.pdf"> * Memory Management in the Sun Java HotSpot™ Virtual Machine</a> * @see <a href="http://docs.oracle.com/javase/8/docs/technotes/tools/windows/java.html"> * Full VM options reference for Windo...
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GOTO still considered harmful? [closed]

...to statement considered harmful (also here .html transcript and here .pdf) and there has been a formidable push since that time to eschew the goto statement whenever possible. While it's possible to use goto to produce unmaintainable, sprawling code, it nevertheless remains in modern programmi...
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__FILE__, __LINE__, and __FUNCTION__ usage in C++

...e_location http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1208r5.pdf The documentation says: constexpr const char* function_name() const noexcept; 6 Returns: If this object represents a position in the body of a function, returns an implementation-defined NTBS that should corr...
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Is there a difference between foo(void) and foo() in C++ or C?

...difference. http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf Annex C "Compatibility" C.1.7 Clause 8: declarators says: 8.3.5 Change: In C ++ , a function declared with an empty parameter list takes no arguments. In C, an empty parameter list means that the number and type of...
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How does the MapReduce sort algorithm work?

...nd Implementation, San Francisco, CA, December, 2004. That link has a PDF and HTML-Slide reference. There is also a Wikipedia page with description with implementation references. Also criticism, David DeWitt and Michael Stonebraker, pioneering experts in parallel databases and shared not...