Online Database Query Execution

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.

April 24, we released a preview version of the SQL Database base level (preview) and standard (preview) new service levels and new business continuity features. In this blog post, we delve into the performance of new levels in SQL Database. Begin with the need for change. We focus on performance (specifically predictable performance) in new service levels, driven primarily by strong customer feedback on SQL Database Web-Level and enterprise-class performance. Web-and enterprise-level performance ...

Absrtact: The optimization of database has always been an important problem to be addressed in the operation of many large websites. For example, at the end of March 2012, I have participated in the development of a province's provincial government information public release system, after 4 months of functional development and testing of the database optimization has been a lot of large-scale web site operation must be addressed in the important issues. For example, at the end of March 2012, I have participated in the development of a province's provincial government information public release system, after 4 months of functional development and testing, the system officially online, because the system uses ...

In the development of friends especially and MySQL have contact friends will encounter sometimes MySQL query is very slow, of course, I refer to the large amount of data millions level, not dozens of, the following we take a look at the resolution of the query slow way. -Often find developers looking up statements that are not indexed or limit n, which can have a significant impact on the database, such as a large table of tens of millions of records to scan all, or do filesort, and the database and server IO impact. This is the case above the mirrored library. And ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall The optimization of the database has been an important problem that many large web sites have to deal with during operation. For example, at the end of March 2012, I have participated in the development of a province's provincial government information public release system, after 4 months of functional development and testing, the system officially online, because the system is ...

Absrtact: Because Hive employs SQL query Language HQL, Hive is easily understood as a database. In fact, the structure of the Hive and the database in addition to have a similar query language, there is no similarity. This article will explain the differences between Hive and database from several aspects. The database can be used in Online applications, but Hive is designed for the Data Warehouse, which helps to understand the characteristics of Hive from an application perspective. Hive and database comparison query Language ...

Guide: Mike Loukides is the vice president of the content strategy of O ' Reilly Media, and he is very interested in programming languages and UNIX system management, with system configured tuning and UNIX power Tools. In this article, Mike Loukides put forward his insightful insights into nosql and thought deeply about all aspects of modern database architecture. In a conversation last year, Basho, CTO of the company, Justin Sheehy, recognized ...

In recent years, the database market has become the geometric level of growth, various database software market scale has been expanding. 　　New applications continue to emerge, the future development of the database market will appear a new trend. Cloud era, full of imagination from cloud computing to http://www.aliyun.com/zixun/aggregation/13883.html "> Virtualization technology, to self-help business intelligence tools, databases face new challenges from information management technology innovation." "Cloud" era let the database industry technology ...

1. Languages used in COUCHDB: Erlang features: DB consistency, easy to use license: Apache protocol: http/rest bidirectional data replication, continuous or temporary processing, processing with conflict checking, therefore, The use of Master-master replication (see note 2) mvcc– write without blocking read operation Pre-save version crash-only (reliable) design requires data compression view: Embedded mapping/Reduce formatted view: List display support for server ...

The greatest fascination with large data is the new business value that comes from technical analysis and excavation. SQL on Hadoop is a critical direction. CSDN Cloud specifically invited Liang to write this article, to the 7 of the latest technology to do in-depth elaboration. The article is longer, but I believe there must be a harvest. December 5, 2013-6th, "application-driven architecture and technology" as the theme of the seventh session of China Large Data technology conference (DA data Marvell Conference 2013,BDTC 2013) before the meeting, ...