Oracle Describe Index

After more than eight years of practice, from Taobao's collection business to today to support all of Alipay's core business, and in the annual "Double Eleven Singles Day" continue to create a world record for the transaction database peak processing capacity.

As a software developer or DBA, one of the essential tasks is to deal with databases, such as MS SQL Server, MySQL, Oracle, PostgreSQL, MongoDB, and so on. As we all know, MySQL is currently the most widely used and the best free open source database, in addition, there are some you do not know or useless but excellent open source database, such as PostgreSQL, MongoDB, HBase, Cassandra, Couchba ...

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 ...

Editor's note: Jay Kreps, a chief engineer from LinkedIn, says that logs exist almost at the time of the computer's creation, and there is a wide range of uses in addition to distributed computing or abstract distributed computing models. In this paper, he describes the principles of the log and the use of the log as a separate service to achieve data integration, real-time data processing and distributed system design. Article content is very dry, worth learning. Here's the original: I joined the LinkedIn company at an exciting time six years ago. From that time ...

Editor's note: Jay Kreps, a chief engineer from LinkedIn, says that logs exist almost at the time of the computer's creation, and there is a wide range of uses in addition to distributed computing or abstract distributed computing models. In this paper, he describes the principles of the log and the use of the log as a separate service to achieve data integration, real-time data processing and distributed system design. Article content is very dry, worth learning. Here's the original: I joined the LinkedIn company at an exciting time six years ago. From that time ...

Large data as a hot word for the web, has been frequently mentioned recently. In fact, global industry giants have been aware of the arrival of the "Big Data Age" by acquiring large data-related vendors for technology integration. 　　Experts say China has the opportunity to lead the development of the cloud computing industry in the "Big Data Age". At the 2012 China Data Center Conference held recently, Ubaogui, Deputy chief engineer of China Institute of Electronic Information Industry development, said that data center as the main support platform for enterprise IT construction, how to effectively and rationally control the total cost of ownership under the premise of the large data to obtain a price ...

Intermediary transaction SEO troubleshooting Taobao guest Cloud Mainframe technology Hall These people in the SP era Amoy to the first bucket of gold, now in the era of the intelligent mobile Internet, the past "fast law" can achieve their "new dream"? Article | Colin Zhang Zhijian Start the second month cash flow began as positive, the 1th year to buy a house. That was 2004, the SP industry's highest rise in the period, his team name registered a number of companies, respectively, to serve the mobile, unicom and telecommunications, each month to do ...

The concept of "big data" originally originated in the United States. Here the "big" is usually used to describe the three-dimensional characteristics of the data: the first dimension refers to the increasing volume of information, the second dimension refers to a wide variety of information, and the third dimension index becomes usable information and can be analyzed faster and faster. As early as 1969, Wal-Mart, the world's retail giant, used computers to analyze consumer purchases, and found that male shoppers tended to "match" a few bottles of beer while buying diapers, and promoted the sale of beer and diapers. Now, this "beer ...

First, the initial understanding of large data seems to be overnight, big data becomes one of the most fashionable words in the IT industry. First of all, big data is not a completely new thing, Google's search service is a typical large data use, according to customer demand, Google real-time from the global mass of digital assets (or digital garbage) ...

For product managers, to win the respect and support of developers, in a sense, is the product to achieve a solid step towards success. 　　Recently, the community of developers and managers in the first and last two posts in the intense discussion, there is no lack of insights. 　　Lin Zhilin cray that product managers ' decisions and actions should serve the goals of the project, not the struggle, and team management should be noted for: 1. Understand art/front-end/back-end working principle. If you know the art design main Menu hover two level of irregular projection will waste the front end ...