Graph Database Theory

A few days ago, there was much speculation about what new products Facebook would launch. 　　The answer is now. 　　Facebook held a press conference in Tuesday (January 15) at Menlo headquarters, and CEO Mark Zuckerberg announced the introduction of the graph Search tool. Graph Search This is the most important product that Facebook has launched since its launch in May 2012, and its distinguishing feature from ordinary search is that it is a search that is closely related to users. ...

A few days ago, there was much speculation about what new products Facebook would launch. The answer is now. Facebook held a press conference in Tuesday (January 15) at Menlo headquarters, and CEO Mark Zuckerberg announced the introduction of the graph Search tool. Graph Search This is the most important product that Facebook has launched since its launch in May 2012, and its distinguishing feature from ordinary search is that it is a search that is closely related to users. It is face ...

Large data areas of processing, my own contact time is not long, formal projects are still in development, by the large data processing attraction, so there is the idea of writing articles. Large data is presented in the form of database technologies such as Hadoop and "NO SQL", Mongo and Cassandra. Real-time analysis of data is now likely to be easier. Now the transformation of the cluster will be more and more reliable, can be completed within 20 minutes. Because we support it with a table? But these are just some of the newer, untapped advantages and ...

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 five major database models, whether relational or non relational, are the realization of some data model. This article will give you a brief introduction of 5 common data models, so that we can trace back to the mysterious world behind the current popular database solutions. 1. The relational model relational model uses records (composed of tuples) for storage, records stored in tables, and tables are defined by the schema. Each column in the table has a name and a type, and all records in the table conform to the table definition. SQL is a specialized query language that provides the appropriate syntax for finding records that meet the criteria, such as ...

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 ...

The fastest way to store a computer system is the ram traditionally used primarily as memory. As the access performance of the hard drive has deteriorated over the years, and the cost of RAM has been decreasing, many researchers have been exploring how to replace the hard disk with memory in recent years. As early as the 1980, David DeWitt and Garcia-molina and so on published a main memory database paper. Steven Robbins's article points out that the Turing Prize winner, Jim Gray, is more explicit about the idea that "memory will be a hard drive and the hard drive will become a tape."

Graphic database is a kind of non relational database, it applies graph theory to store the relation information between entities. The most common example is the http://www.aliyun.com/zixun/aggregation/7518.html "> Relationship between people" in social networks. Relational databases are not good for storing "relational" data, their queries are complex, slow, and beyond expectations, and the unique design of a graphics database compensates for this flaw. Google's graphics computing system named PR ...

"Csdn Live Report" December 2014 12-14th, sponsored by the China Computer Society (CCF), CCF large data expert committee contractor, the Chinese Academy of Sciences and CSDN jointly co-organized to promote large data research, application and industrial development as the main theme of the 2014 China Data Technology Conference (big Data Marvell Conference 2014,BDTC 2014) and the second session of the CCF Grand Symposium was opened at Crowne Plaza Hotel, New Yunnan, Beijing. 2014 China large data Technology ...

In Shanghai, December 20, Frosty, a five-floor conference room at 1189th Wu Zhong Road, is standing between a projection screen and a whiteboard between Professor Alan Yuille, a hand-holding cheek, thoughtfully. In front of him is an admiring, selected from Tsinghua University, Zhejiang universities with computer-related background of more than 40 students. Because Professor Alan obtained a Ph. D. in theoretical physics under Hawking's guidance, and was also a top scholar in the field of computer vision. At the invitation of his student, Leo Zhu, founder of Science and Technology, he came all the way to China to open ...