convert relational database to mongodb

Brief introductionMean is a full stack development framework for JavaScript. More aboutThe storage of persistent data with MongoDB is a part of mean web full stack development.MongoDB is a product between a relational database and a non-relational database, and is the most v

First, MongoDB Introduction MongoDB (named from "Humongous") is a scalable, high-performance, open-source, schema-free, document-oriented database that combines the benefits of a document database, key-value pair storage, and relational

only _id index is established when synchronizing the data), the stage of copying the data, secondary constantly pull the new oplog, ensure that the secondary local database has enough space to store the temporary data.2. More Efficient load balancing:In MongoDB 3.2 and previous versions, the load balancer of a shard cluster is responsible for MONGOs, multiple MONGOs will grab a distributed lock, the succes

. such as transactions, join queries, and so on.At present, the performance of the above MongoDB, but also in the distribution mechanism than MongoDB perfect.To say weaknesses, mainly in the promotion and development of the community, MongoDB's earliest starting point is from the development began.E-R relational structure is too slow for development iterations, s

"Abstract" Today has entered the era of large data, especially large-scale Internet web2.0 application development and cloud computing needs of the mass storage and massive computing development, the traditional relational database can not meet this demand. With the continuous development and maturation of nosql database, it can solve the application demand of ma

database structure, you need to ask yourself a question you will not consider when using a relational database: What is the size of the collection in this relationship? You need to realize that a pair is very few, a couple of many, a couple very much, these subtle differences. In different situations, your modeling will be different.Basics:modeling one-to-fewCou

reading to release the Web server app server and DB pressure.Let's talk about MongoDB.MongodbMongoDB is a relatively good non-relational database of the document-type database. Its advantages are mainly reflected in:1) Open source. It means that even if we don't change it, we can dig it up, and MS SQL knows how to do it internally, in addition to looking at thos

Original Address http://www.cnblogs.com/nbpowerboy/p/4325692.html "Abstract" Today has entered the era of large data, especially large-scale Internet web2.0 application development and cloud computing needs of the mass storage and massive computing development, the traditional relational database can not meet this demand. With the continuous development and maturation of nosql

Label: This note aims to learn and summarize MongoDB for the HTTPS://WWW.SHIYANLOU.COM/COURSES/RUNNING/50 website. 1, Start MongoDBbecause the MongoDB service does not start up with the system, you need to start the MongoDB service first: shiyanlou:~/$ sudo service MongoDB start 2, Introduction to the

This period of time to try MongoDB, feel very easy to use, convenient, compared to relational database advantages are also very large, so try to use Java to connect MongoDB, and carried outBasic additions and deletions to check the operation.First, connect to the database in

In the traditional database, we have to manipulate the database data to write a large number of SQL statements, and in the storage of irregular data, the traditional relational database table when the processing of different fields appears to be a bit weak, MONGO, and the wide application of AJAX technology, JSON forma

MongoDB is a high-performance, open-source, and non-pattern document-based database. It can be used in many scenarios to replace the traditional relational database or key-value storage mode. MongoDB is used MongoDB is a high-perf

MongoDB is a very popular non-relational database that does a good job of object-oriented data storage. Here is not detailed introduction of its use, this article mainly explains how to install the MongoDB database, the installation process encountered in the problem and the

/1jIhnwVW Password:wgxwMongobooster After the installation of the specific interface (PS: and the use of MySQL -related visualizer very much like, with very good): Three, the basic concept of MongoDB and the difference between the relational data MongoDB Database Basic concepts:

This article mainly introduced the PHP database operation MongoDB Usage, combined with the case form more detailed analysis of MongoDB function, installation, basic commands, use methods and related considerations, the need for friends can refer to the next Specific as follows: Traditional database, we want to manipul

Tags: Traditional database, we want to manipulate database data to write a large number of SQL statements, and in the storage of irregular data, the traditional relational database table when the processing of the different fields also appear somewhat weak, Mongo came into being, and the wide application of AJAX tech

Let's start by introducing the basic concepts of MongoDB:The left column is the term for the relational database, and the right column is the term NoSQL and MongoDB.Database:database DatabaseTable:collection Database Tables/CollectionsRow:document data record lines/documentsColoum:field data fields/fieldsIndex:index IndexTable joins: Tables connection,

MongoDBDataLibrary IntroductionMongoDB is a highPerformance,Open Source, NoneModeDocumentationDatabaseIt can be used in many scenarios to replace the traditional relational database or key/value storage mode. MongoDB uses C ++Development, Provides the following features: Set-oriented storage: Suitable for storing objects and JSON data. Dynamic query: Mongo sup

, JAVA, C ++, PHP, and other languages. The file storage format is BSON (a json extension) Accessible through the network The so-called "collenction-orented" means that data is stored in a data set by groups and is called a collection ). Each set has a unique identification name in the database and can contain an infinite number of documents. The concept of a set is similar to that of a table in a relational