Database Index Types

Designing 1 applications doesn't seem to be difficult, but it's not easy to achieve the optimal performance of the system. There are many choices in development tools, database design, application structure, query design, interface selection, and so on, depending on the specific application requirements and the skills of the development team. This article takes SQL Server as an example, discusses the application performance optimization techniques from the perspective of the background database, and gives some useful suggestions. 1 database design to achieve optimal performance in a good SQL Server scenario, the key is to have 1 ...

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.

Introduction with the advent of the cloud computing era, various types of Internet applications are emerging, the relevant data model, distributed architecture, data storage and other database related technical indicators also put forward new requirements. Although the traditional relational database has occupied the unshakable position in the data storage, but because of its inherent limitation, has been unable to satisfy the cloud computing age to the data expansion, reads and writes the speed, the support capacity as well as the construction and the operation cost request. The era of cloud computing has put forward a new demand for database technology, which is mainly manifested in the following aspects. Mass data processing: to ...

As two of the most popular technologies in the field of information management, the hardware architecture of database integration machine and large data technology is basically the same, but the software system has the essential difference, which leads to the different characteristic performance. With the rapid growth of enterprise data and the continuous improvement of users ' requirements for service level, the traditional relational database technology has shown obvious lack of ability in production practice for a long time. How to obtain high availability of massive data at reasonable cost has become a major challenge in modern it field. In order to meet this challenge, in recent years, it market ...

A good database product is not equal to have a good application system, if can not design a reasonable database model, not only will increase the client and Server section program programming and maintenance of the difficulty, and will affect the actual performance of the system. Generally speaking, in an MIS system analysis, design, test and trial run stage, because the data quantity is small, designers and testers often only notice the realization of the function, but it is difficult to notice the weak performance, until the system put into actual operation for some time, only to find that the performance of the system is decreasing, At this point to consider improving the performance of the system will cost more ...

"IT168" I have always felt that nosql in fact very easy to understand, I have also had a very in-depth study of NoSQL, but in the recent preparation of yuntable chart, found that NoSQL not only very profound, 　　And my personal understanding of NoSQL is only superficial, but I am still a "shame and then Yong" people, so after a period of study, from the sixth part of this series, will talk to you nosql, and this article will be the main to do a NoSQL database review. ...

First, the importance of the index The index is used to quickly find a column in a particular value of the line. Instead of using an index, MySQL must start with the first record and then read the entire table until it finds the relevant row. The larger the table, the more time it takes. If the table in the query column index, MySQL can quickly reach a location to search the middle of the data file, there is no need to see all the data. Note that if you need to access most of the rows, sequential reads are much faster since we avoid disk searches. If you use Xinhua Dictionary to find "Zhang" the Chinese characters, do not use the directory, then ...

As a http://www.aliyun.com/zixun/aggregation/6434.html "> software developer, we value the abstraction of things." The simpler the API, the more attractive it is to us. 　　Dialectically, the biggest advantage of MongoDB is the "elegant" API and its agility, which makes the coding process of developers unusually simple. However, when MongoDB involves large data scalability issues, developers still need to know the bottom of it ...

The intermediary transaction SEO diagnose Taobao guest Cloud host technology lobby search engine have what basic type? (Web marketing Teaching website www.wm23.com Feng Yingjian 2005-02-16) with the development of search engine technology and market, there are many different types of search engines, various kinds of media on the search engine nouns are more and more, even create a dazzling feeling, such as interactive search engine, Third-generation search engine, fourth generation search engine, Desktop Search ...

The intermediary transaction SEO diagnose Taobao guest Cloud host technology Hall to SEO (Search engine Optimization), let the page within the site can be timely, comprehensive search engine index, included should be said to be the first task, this is the implementation of other SEO strategy of the most basic guarantee. However, this is often easy to overestimate a link, for example, we can often see some people claim that their site is Google included how many pages such as a few k or even dozens of K to prove the success of the SEO work. But objectively speaking, the Web page is only indexed by search engines, included is not too big ...