Query Programming

As far as I am concerned, the so-called client and server development, in most cases, do not need to solve their own problems from the very bottom, more of the use of "architectural power." The function of language is to invoke all the existing software, that is, to write "Glue code" (So, if you want to write the OS, you don't have to look down). In this context, the main concern for programming languages is whether the abstract granularity it provides is suitable for its application scenario (glue). JavaScript in the client, has played its role, this need not ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall Everyone in the site keyword ranking data query will use webmaster tools, such as Love Station Network tool query, Bole and so on. Last year I learned the site programming when I wrote an SEO tool, used to collect the rankings on the Internet ranked good site data, the amount of data is very large, each collection completed dozens of g number ...

Translation: Esri Lucas The first paper on the Spark framework published by Matei, from the University of California, AMP Lab, is limited to my English proficiency, so there must be a lot of mistakes in translation, please find the wrong direct contact with me, thanks. (in parentheses, the italic part is my own interpretation) Summary: MapReduce and its various variants, conducted on a commercial cluster on a large scale ...

Cloud computing: Redefining IT over the past year, cloud computing exploded, including a variety of applications-such as Salesforce CRM and Google apps-and services-such as hosting Amazon elastic Compute Cloud (Amaz On EC2) ibm®db2®, Google ...

In January 2014, Aliyun opened up its ODPS service to open beta. In April 2014, all contestants of the Alibaba big data contest will commission and test the algorithm on the ODPS platform. In the same month, ODPS will also open more advanced functions into the open beta. InfoQ Chinese Station recently conducted an interview with Xu Changliang, the technical leader of the ODPS platform, and exchanged such topics as the vision, technology implementation and implementation difficulties of ODPS. InfoQ: Let's talk about the current situation of ODPS. What can this product do? Xu Changliang: ODPS is officially in 2011 ...

This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

MapReduce: Simple data processing on large cluster

In the past, we have introduced some principles of software development, such as the 10 commandments of high quality code and the UNIX design principles described in the UNIX legend (next article). I believe that you can learn from middle school some knowledge of design principles, as I said in the "How Do I Recruit procedures", a good programmer usually consists of its operational skills, knowledge level, experience level and ability four aspects. Here I would like to talk about some of the principles of design, I think these things belong to the long-term experience summed up knowledge. These principles should be understood by every programmer. But...

With the proliferation of data volume, Mysql+memcache has not met the needs of large-scale Internet applications, many organizations have chosen Redis as its architectural complement, however, redis the use of the threshold is not low, such as not supporting SQL, here for everyone to share the Redis use of the full raiders. Redis, one of the most closely watched NoSQL databases, has been used by many well-known internet companies, such as Sina Weibo, Pinterest and Viacom. However, being born with no support for SQL makes him look difficult ...

What is the most important search engine? Some people say is the accuracy of the query results, some people will say that the query results of the richness, but in fact these are not the most fatal search engine places. For search engines, the most fatal is the query time. Imagine, if you are in the Baidu interface query a keyword, the result will take 5 minutes to your query results feedback to you, the result must be you quickly discard Baidu. Search engine in order to meet the demanding speed (now the business Search engine query time units are microsecond orders of magnitude), so the use of caching support to query the needs of the party ...