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Editor to share with you what are the characteristics of distributed database, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

The characteristics of distributed database are: 1, transparent management of distribution; 2, transparent management of replicated data; 3, reliability of transactions. Distributed data processing uses a divide-and-conquer approach to solve large-scale data management problems.

Distributed data processing uses a divide-and-conquer approach to solve large-scale data management problems. The basic features of distributed data processing are as follows:

1. Transparent management of distribution

In a distributed system, data is not stored in one site, but in multiple sites in a computer network. But logically as a whole, they are shared by all users and managed by a single DBMS. When users access the data, they do not need to indicate where the data is stored, nor do they need to know which server in the distributed system will do it.

2. Transparent management of replicated data

The replication of distributed data helps to improve performance and makes it easier to coordinate different and conflicting user needs. At the same time, when a server fails, the data on this server is backed up on other servers, which improves the availability of the system.

This multi-copy method is transparent to the user, that is, the user does not need to know the existence of the copy, and the system uniformly manages and coordinates the call of the copy.

3. Reliability of transaction

Distributed data processing has a repetitive composition, so it eliminates the problem of single point of failure, that is, the failure of one or more servers in the system will not paralyze the whole system, thus improving the reliability of the system.

However, in the distributed system, transactions are concurrent, that is, different users may access the same data source at the same time, which requires the system to support distributed concurrency control and ensure the consistency of data in the system.

The distributed system can solve the storage and access of massive data, but in the distributed environment, the database will encounter more complex problems, such as:

If the data is stored in a multi-copy way in a distributed environment, how to select a copy when providing data access to the user, or how to modify the data of a copy and how to update each copy in the system.

If you are updating all copies of the system, a server fails due to network or hardware or software problems. In this case, how to ensure that when the failure recovers, the replicas on this server are consistent with the other replicas.

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