Access By Offset

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 ...

The McKinsey Global Research Institute today released the digital transformation of China: The impact of the Internet on Productivity and growth (click to download the full report of PDF), the report points out that in 2013, China's Internet users continued to grow, the Internet is fundamentally restructuring the Chinese way of life. The following is a summary of the report: A digital revolution is surging in China. In 2013, the total number of active smart devices in China increased from 380 million to 700 million units. The same year November 11, "Singles Day" day, online shopping platform Taobao and the cat's sales of more than 36.2 billion yuan ...

In the past few years, the innovative development of the open source world has elevated the productivity of Java™ developers to one level. Free tools, frameworks and solutions make up for once-scarce vacancies. The Apache CouchDB, which some people think is a WEB 2.0 database, is very promising. It's not difficult to master CouchDB, it's as simple as using a Web browser. This issue of Java open ...

Absrtact: From the beginning I know SEO these years, basically all of the SEO activities are based on the front-end, from header to body, from small tags to CSS, from the link to the keyword density; early cow people diagnose a website SEO standard is also starting from the front page, not from the beginning I know SEO these years, Basically all of the SEO activities are based on the front-end, from header to body, from small tags to CSS, from the link to the keyword density; early cow people diagnose a website SEO logo ...

Abstract: Environmental pollution is the livelihood of people suffering, the pain of the public, to be an iron fist. This statement, which appears in the Government's work report this year, shows the importance of environmental protection in the work of the Government in the 2015. On the eve of this year's two sessions, the Chinese Democratic Foundation submitted a "on the promotion of" environmental pollution is the people's livelihood, the pain, to the Iron Fist. 　　This statement, which appears in the Government's work report this year, shows the importance of environmental protection in the work of the Government in the 2015. On the eve of this year's two sessions, China Democratic Foundation submitted a "on the promotion and standardization of our electronic garbage ..."

Summary: View the latest quotes Beijing time November 4 afternoon news, Morgan Stanley published a study today, the Nasdaq:yy in the third quarter of the season, the total revenue is expected to increase 92% year-on-year, to maintain the share of the overweight rating. The following is a summary of the report: Quick check the latest quotes Beijing time November 4 afternoon news, Morgan Stanley released its research report today, the total revenue of the nasdaq:yy third quarter is expected to increase 92%, the dimension ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall vertical search has special requirements for updating information, according to these characteristics can be considered in the following: 1. The stability of the information source (cannot let the information source website feel the spider pressure) 2. The cost of crawling 3. Improve the user experience. According to the above points to develop a better strategy, to do just right. The strategy can be used to evaluate the Web site/web page update coefficient, the site/page key factor, the user click Factor (or exposure factor), the site stability factor ...

Granville shares suspected misappropriation of huge national capital since the scenic mountains and rivers suspected of fraudulent listing, many of the listed enterprises IPO process has attracted attention. February 23, plans to issue 22 million shares of Jiangsu Granville Machine Tool Co., Ltd. (abbreviation: Granville shares of the stock code: 002559) began to purchase.　　However, because of the alleged misappropriation of large state-owned assets, Jiangsu Granville Machine Tool Co., Ltd. has been questioned by all walks of life, many people suggest that the Department of the company to conceal the loss of state capital and other conduct investigation, and suspend its listing eligibility. Asset transfer does not assess the state-owned disposal into a trifling lawyer Zhu ...

Resource expansion-This is the main goal of generating revenue from online sales of goods and services to offset operating costs, and if so, how much revenue will the company expect? These strategic issues could allow the company to assess how much money will move to the electricity business. If the company has approached the electrical business to become a product that covers not only the production and dissemination of the cost of goods and services, but with the hope that its revenue base will be expanded to support other project costs, it may have to develop an electric-business platform and strategy that will make customers interested. The company is likely to pick up ...

The storage system is the core infrastructure of the IT environment in the data center, and it is the final carrier of data access. Storage in cloud computing, virtualization, large data and other related technologies have undergone a huge change, block storage, file storage, object storage support for a variety of data types of reading; Centralized storage is no longer the mainstream storage architecture of data center, storage access of massive data, need extensibility, 　　Highly scalable distributed storage architecture. In the new IT development process, data center construction has entered the era of cloud computing, enterprise IT storage environment can not be simple ...