Tree Structure Database

The concept of blockchain to technology has been around for a long time, but with the heat of the past two years, it has gradually become known by the market and many technicians.

BPS is a set of pointer-set torsion b-tree, which can speed up to the fastest and reduce memory usage and maintenance order based on a hash table collection. This collection introduces a new variety of b-tree with strong search and http://www.aliyun.com/zixun/aggregation/17204.html "> Editing capabilities." Compared with Unordered_set, the collection is only 30% slower, but can reduce memory usage by 3 times times. Compared with order ...

BPS is a set of pointer-set torsion b-tree, which can speed up to the fastest and reduce memory usage and maintenance order based on a hash table collection. This collection introduces a new variety of b-tree with strong search and http://www.aliyun.com/zixun/aggregation/17204.html "> Editing capabilities." Compared with Unordered_set, the collection is only 30% slower, but can reduce memory usage by 3 times times. Compared with Orde ...

NoSQL systems generally advertise a feature that is good performance and then why? relational database has developed for so many years, various optimization work has been done very deep, nosql system is generally absorbing relational database technology, and then, in the end what is the constraints on the performance of relational database? We look at this problem from the perspective of http://www.aliyun.com/zixun/aggregation/9344.html "> System design." 1, index support. Relational data ...

php tutorial + mysql tutorial database tutorial unlimited classification code This paragraph php infinite classification code more complete, including the database is mysql, add, delete, edit, move the function, while also providing the database sql table structure // connect to the database $ link = mysql_connect ('localhost', 'root', '') or die (mysql_error ()); mysql_select_db ('class', $ link) or d ...

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 ...

A small mobile phone application, but all-encompassing, integration of this complex information content or functional logic. To let users get the best experience in the use, quickly grasp the application of the framework structure, the navigation design is an important link. The navigation of mobile apps is similar to the role of signposts or maps in the real world. It is the virtual framework of the application software, which has the function of indicating identity and recognizing the user. For example, as a signpost, navigation can be in use, locate where the user is currently, to highlight the current view of the user important features, tell users where to go, in different views and areas quickly cut ...

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 ...

Research on the privacy protection of document-oriented database based on SaaS the Kang Jin of Shandong University This paper first proposes a document-oriented database privacy protection architecture, which, on the basis of the original SaaS architecture, creates a new SaaS service deployment architecture by adding a privacy layer between the application layer and the storage layer. This architecture decoupling the privacy protection system from the SaaS application system. In this architecture, the privacy protection system is transparent to both SaaS applications and database systems. Then, this paper introduces the basic method of privacy protection based on the face document database, in order to adapt ...

Oracle as the world's largest relational database provider, in its product chain, also joined the NoSQL database, and this new database name is very domineering, called NoSQL db. Oracle's NoSQL Database, one of the components of the Big Data appliance, released on the Oracle Global Encyclopedia on October 4, is a component of the Big Data appliance, an integrated Hadoop, NoSQL Database, O ...