Cloud Informations

The current development of Hadoop, especially after the advent of Hadoop 2.0, HDFs and yarn Two systems have a number of significant features have been achieved, and thus promote the development of the upper computing system, including the emergence of Tez to make hive and pig have a greater performance improvement, 　　There are a variety of new frameworks based on yarn. May 20, 2014, CSDN work together chinahadoop small elephant community will build a distributed online storage system HBase, Data Warehouse hive, Hadoop in the telecommunications transport ...

Mention of open source, from software, hardware and ideas have become more and more popular, the application form is also more abundant. 　　If the enterprise wants to start a new open source project, the five Open source project "traps" proposed by the OpenSource website should be paid attention to, at the same time, the project execution has been carried out, by understanding that it can be done effectively and smoothly at any stage. Just support yourself if you plan to release an Open-source product, you need to have a deep understanding of what "support you need" means. Don't expect people from all walks of life to help you provide product support, and everyone will think that what they do is very heavy ...

I have been in touch with Hadoop for almost two years, and have not summed up the installation tutorial myself, and have recently used Hadoop to build a cluster to carry out the experiment, so I use this opportunity to write a tutorial for later use, and to discuss with you. To install Hadoop first install its secondary environment Java Ubuntu Java installation and configuration will be Java installed in the specified path to find use after convenient. Java installation 1) in the/home/xx (that is, the current user) directory, new java1.xx file ...

Absrtact: 7 years ago, one of the ideas, the success of today's popular social network and microblogging service--twitter. Twitter now has more than 200 million monthly active subscribers, and about 500 million tweets are sent every day. 　　Behind all this is the support of a large number of open source projects. Twitter, known as the "Internet SMS Service", allows users to post no more than 140 tweets, the idea from Twitter's co-founder, Jack Dorsey, which was dubbed "the dumbest Ever" by analysts 7 years ago ...

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp;   Hadoop is a distributed system platform, it can easily build an efficient, high-quality distribution system, and it has many other related subprojects, that is, its function of a great expansion, including Zookeeper,hive,hbase. ...

Introduction history started by Chad Walters and Jim 2006.11 G release monitors on http://www.aliyun.com/zixun/aggregation/14239.html " >bigtable 2007.2 inital HBase prototype created as Hadoop Co ...

Environmental preparedness: CentOS 5.5 x64&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; (3 sets) 10.129.8.52 (master) ======>> Namenode, Secondarynamenode,jobtracker 10.129.8.76&

Http://www.aliyun.com/zixun/aggregation/1560.html ">facebook upgraded the Flashcache Open Source tool, allowing administrators to get higher performance from inexpensive disk arrays configured with PCIe flash cards. The Flashcache tool is now upgraded to version 3.0. The tool allows Facebook to use the high-performance cache on the PCIe Flash memory card to speed access to critical data without costly use of full flash array ...

Http://www.aliyun.com/zixun/aggregation/14417.html ">apache HBase 0.96.0 has been released from the 0.94.x version for more than a year, so we recommend that users upgrade to this version." This release fixes more than 2000 problems, while significantly improving stability, operability, and scalability.　　For more information, see the release notes. Hbase–hadoop Database, ...

Our demand is to count the number of occurrences of each word in a file after the IK participle, and then to sort by descending the number of occurrences. 　　That is, high-frequency word statistics. Because Hadoop cannot do anything with the result after reduce, it can only be divided into two jobs, the first job count, and the second job to sort the results of the first job. The first job is the simplest example of Hadoop countwords, I would say is to use Hadoop to sort the results. Suppose the results of the first job are output as follows: ...

Hadoop version number: hadoop-0.23.5 hive version number: hive-0.8.1 Derby version number: db-derby-10.9.1.0 mysql version number: mysql-5.1.47 (Linux redhat installation installed) The first is the hive embedded mode of installation, in hive Embedded installation when the default database is Derby, the installation of embedded mode can not be used for the actual work, namely this model ...

Ubuntu founder: Ubuntu mobile phone enters China market next year 23 hours ago | Times Read | SOURCE csdn| 0 Reviews | The author collates the Ubuntu operating system open source mobile operating system Smartphone iosandroid Summary: 21st, Ubuntu founder Mark Shuttleworth appeared in the building of the Ministry of Software and integrated Circuit Promotion Center (CSIP) to complete canonical company, National Defense Science and Technology University (NUDT) and the CSIP tripartite Joint establishment of open source software ...

Nutch2.1 extends the storage layer through Gora, supporting Http://www.aliyun.com/zixun/aggregation/13713.html ">hbase, Accumulo, Cassandra, MySQL, Datafileavrostore, Avrostore and other storage methods. In my repeated tests found that Nutch2.1 than 1.6 of the performance is much worse, the most important thing is not long-term stability ...

Open Source JS MVC Framework backbone.js 1.0 released 22 hours ago | Times Read | SOURCE csdn| 0 Reviews | The author Zhang Hong month http://www.aliyun.com/zixun/aggregation/33906.html ">javascript Framework Open Source Backbone.js Absrtact: Backbone.js provides a set of web development framework, through model for Key-valu ...

Open source Framework Taae release quickly build iOS audio apps published 22 hours ago | Times Read | SOURCE csdn| 0 Reviews | Author Yang Yifan Open Source development tool iOS Mobile Development Taaemichaeltyson Summary: TAAE is an open-source http://www.aliyun.com/zixun/aggregation/13435.html for iOS platform "> Development framework, which can help developers easily build iOS audio applications, handle ...

Hadoop classname Command Use note-point blog Category: Hadoop hadoop&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Hadoop uses the Hadoop classname command. This classname is the name of the class you wrote. The Hadoop classname command is similar to the Java Classna ...

Inventory of the technology industry's most creative 25 people published 21 hours ago | Times Read | SOURCE csdn| 0 Reviews | Author Qian Shu Googleiphone founder Open Source Abstract: The secret of competitive advantage is innovation, corporate culture should promote innovation, and this innovation will lead to the success of competition. Business Insider, America's leading media, recently ranked 25 of the most creative people in the technology industry who changed the rules of the game, developed exciting technologies, designed wonderful new products, and started to influence the entire industry ...

58 the same city open source Lightweight Java Web Framework Argo published 21 hours ago | Times Read | SOURCE csdn| 0 Reviews | The author Zhang Hong month open source 58 the same City Java framework Summary: 58 with the city open source its Lightweight Java web Framework--argo,argo originated with 58 of the city's internal Web framework WF (Web framework). WF currently supports nearly all 58 of the city's web sites. The developers ' response to the open source was very strong, almost 90 times a day.

Improving data access: http://www.aliyun.com/zixun/aggregation/13713.html ">hbase, Sqoop, and flume release time: 2012.04.16 14:38 Source: And the Author: News The Hadoop core is a batch system with data loaded into the HDFs 、...

What is a column-oriented open source distributed database HBase release time: 2012.04.16 14:41 Source: News and Author: HBase is a distributed, column-oriented open source database, developed by the Apache Foundation. Unlike a generic relational database, HBase is a database suitable for unstructured data storage. It is based on a column rather than a row based pattern. User stores data ...