当前位置：网站首页>Mongodb introduction and typical application scenarios

Mongodb introduction and typical application scenarios

2022-06-27 20:27:00 【Ink Sky Wheel】

Click on the above In blue , Pay attention to our

What is? NoSQL

NoSQL：Not Only SQL , In essence, it is also a database technology , Compared with traditional database technology , It doesn't follow some constraints , such as ：sql standard 、ACID attribute , Table structure, etc .

advantage

1 Meet the high concurrency of reading and writing to the database
2 Efficient storage and access to massive data
3 High scalability and high availability for database
4 Flexible data structure , To meet the scenario that the data structure is not fixed

shortcoming

1 Transactions are generally not supported
2 The implementation is complex SQL The query is complicated
3 The data maintenance threshold of operation and maintenance personnel is high
4 At present, it is not the mainstream database technology

classification

Mongodb Basic concepts

What is? MongoDB

MongoDB： It's a database , High performance 、 Modeless 、 Documentation , at present nosql The hottest database in , Open source products , be based on c++ Development . yes nosql The most functional database , Most like a relational database nosql db.

characteristic ：

1 Collection oriented document storage ： Suitable for storing Bson（json An extension of ） Data in form ;
2 Free form , Data format is not fixed , Modifying the structure in the production environment can not affect the program operation ;
3 Powerful query statements , Object oriented query language , Basic coverage sql All language skills ;
4 Full index support , Support query plan ;
5 Support replication and automatic failover ;
6 Support binary data and large objects （ file ） Efficient storage ;
7 Use fragmented clusters to improve system scalability ;
8 Use the memory mapped storage engine , Put the disk IO The operation is converted into a memory operation ;

MongoDB Basic concepts

MongoDB Concept and RDMS Conceptual contrast

MongoDB Application scenarios

There is no business scenario that has to be used MongoDB Can solve , But use MongoDB It usually allows you to solve problems at a lower cost （ Including learning 、 Development 、 Operation and maintenance costs ）

MongoDB Our application has penetrated into various fields , Such as game 、 logistics 、 Online retailers 、 Content management 、 social contact 、 The Internet of things 、 Live video, etc , Here are a few practical application cases ：

1 Game scenario , Use MongoDB Store game user information , User's equipment 、 Integration and so on are directly stored in the form of embedded documents , Convenient query 、 to update
2 Logistics scenario , Use MongoDB Store order information , The order status will be updated during shipment , With MongoDB In the form of an embedded array to store , One query can read all the changes of the order .
3 Social scene , Use MongoDB Store and store user information , As well as the user's published circle of friends information , By geolocation index to achieve people around 、 Location and other functions
4 Internet of things scenario , Use MongoDB Store all the connected smart device information , And the log information reported by the equipment , And the multi-dimensional analysis of these information
5 Live video , Use MongoDB Store user information 、 Gift information

What scenes can't be used MongoDB？

1 Highly transactional systems ： For example, banks 、 Financial system .MongoDB Weak support for things ;
2 Traditional business intelligence applications ： Data analysis for specific problems , Multi data entity Association , It involves complex 、 Highly optimized query method ;
3 Use sql When it's convenient ; The data structure is relatively fixed , Use sql When it is more convenient to make query and statistics ;

END