The future star of NoSQL databases and the future star of nosql Databases

Source: Internet
Author: User

The future star of NoSQL databases and the future star of nosql Databases
Relational Database Value

When learning NoSQL, we certainly think of the mainstream database-SQL database at this stage. Why does SQL database become the mainstream? It is mainly based on the following advantages:

Obtain persistent data: mainly because of the two storage areas in the computer architecture, the primary storage and the backup storage.

Concurrency: transaction mechanism can be used to handle

Integration: using the shared database integration method, multiple applications can share the same database.

Almost standard model: Based on the above advantages, and a variety of SQL dialect are similar, making it an almost standard model.

Impedance detuning

However, relational databases have a major drawback: the biggest disappointment for application developers is the difference between the relational model and the data structure in the memory, this phenomenon is often called "impedance detuning ".

The data content of each application in "application database" has an application code library for direct access, and this code library is maintained by a team. Such a database becomes an "Application Database" and "Integrated Database" SQL acts as an integration mechanism for applications, which is the main reason why SQL becomes the mainstream. The concept of integration has been explained above. The integrated database is a database based on this principle. Easy ~


"Cluster"

More computer resources are required for the increase of data and traffic. There are two solutions to deal with such growth: vertical scaling and horizontal scaling. The former requires computers with higher performance, such as the increase in processors, disks, and memory. The latter uses multiple small computers to form a cluster. The second method can be more flexible: we can build a highly stable cluster, and the computing of some computers often fails without affecting the operation of the entire cluster.

Based on the above problems, NoSQL has to create new ways for Google and Amazon, namely BigTable and Dynamo. NoSQL can solve the above problems well. The common features of various NoSQL databases are as follows: relational models are not used to run well in clusters. They are usually used under open source conditions (or the source can be closed) hybrid persistence is an important impact of the rise of the "no-model NoSQL" model for Internet companies in the 21 World.

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