nosql database schema design

Tags: style blog http os using IO strong ar forDatabase design Specifications 1. IntroductionDatabase design refers to a given application environment, constructs the optimal database pattern, establishes the database and other application system, enables it to effectively store the data, satisfies the various user's d

documentation, sub-references, and parent references.Use bidirectional references to optimize your database schema, provided you accept the cost of not being able to update atoms.You can redundant data in a reference relationship to one or N-side.The following factors need to be considered when deciding whether to use anti-normalization:You will not be able to perform atomic updates on redundant data.The

judge the quality of the distributed database.Read/write separation: The master-slave node can play a role; for example, the giant FIR sequoiadb database, can be used in a group of three copies of the replication group to implement the Oltp,nosql application, OLAP multiple application scenarios simultaneously.Low cost: x86 server, SATA storage (partially available SSD), plus better network bandwidth.1. Hor

: One of the properties of a relational schema R1 is the main code of another relational schema R2, which is called a foreign code.Reference Relationship : Called R1 as the reference relationship of external code dependency.Referenced Relationship : Called R2 as the reference relationship of external codes.Database Schema : The logical

DirectoryOverall design processDemand analysisConceptual structure DesignLogical Structure DesignPhysical Design of databaseDatabase implementationDatabase operation and Maintenance Overall design processDatabase Design steps:Design Description:Database design at diffe

Tags: setting str RAC IMG Database Modeling table click Ber Shortcut Reprint Please specify source: http://blog.csdn.net/dongdong9223/article/details/48318877This article is from "I'm a fish-hook blog." 1 Brief introductionMySQL Workbench is a er/database modeling tool designed for MySQL. It is a successor to the famous database

First of the previous picture: Explanation: The image above is a tree-shaped data structure, thought for the acquisition of 50000 machine performance data, every 5 minutes collection, storage for two years (two years after the data can be deleted, so there are 730 days), each machine has an IP address (50,000 machines have 50,000 IP address), Multiple ports, such as switches, are: eth0,eth1,... ), each port collects 16 performance data (the number of packets, the number of contracts, the nu

constrain our model, but in the NoSQL model, the inverse paradigm is used extensively. the contrast between paradigm and inverse paradigm Paradigm-based model Data is not redundant, update is easy When the number of tables is more,Query design requires many association models (joins), resulting in poor query performance Inverse Normalization model Data redunda

TagID # tag tagTagName #tag内容Num #当前Tag的引用个数Tagmap tableThe code is as follows:TagIDAidArticle tableThe code is as follows:ID #文章IDTitle #文章标题Tags #tags列表, multiple to, split...In this form, the tag table and the Tagmap table are updated each time the content is published and the content is modified.When querying, you need to find the article ID of the response from the Tagmap table, and then use the article ID to query the specific article information, because each query is indexed, so it is m

ConceptBaidu Encyclopedia to the database design gave the following description:Database design is to construct the optimal database schema for a given application environment, establish the database and its application system so

relational database design is the process of organizing and structuring data, and the core problem is the design of relational model. A relational model is a mathematical model that describes the relationship between entities by using two-dimensional tabular data, which is the collection of all relational schemas, attribute names, and keywords, and is the object

A relational database is designed to conform to certain rules. In particular, database design paradigm is briefly introduced 1NF (first normal form), 2NF (second normal form), 3NF (third normal form) and BCNF, another fourth normal form and fifth normal form are left to be introduced later. When you design a

before the completion of the computer room charges, but the database is just a step-by-year copy of the original database, and did not follow the steps to design. This. NET version of the room charge, the requirements of our high, fully follow the steps to develop, database design