Distributed database architecture and principle based on Informix

Distributed database architecture and principle based on Informix introduction: With the continuous increase in data volume and the needs of business development, the traditional single -machine database system can no longer meet the business requirements.In order to improve the storage and processing capabilities of data, the distributed database should emerge.Informix is a commonly used relational database management system that provides a powerful distributed database architecture and principle that can support the management and processing of large -scale datasets.This article will focus on introducing the distributed database architecture and principles based on Informix, and explore its workflow and programming code and related configuration. 1. Distributed database architecture: Informix's distributed database architecture is based on client/server model.It includes the following three main components: client, database server, and distributed query optimizers.The client is responsible for interacting with users and sends the query request to the database server.The database server is responsible for storing and processing data and returned the result to the client.The distributed query optimizer is responsible for parsing the query request, and decides how to distribute the request to each data node for execution based on the data distribution situation and index information. 2. Distributed database principle: Informix's distributed database principle is based on global transactions.Global affairs refer to a group of operations across multiple data nodes. These operations must be all successful or rolled back.In order to achieve global affairs, Informix uses Two-Phase Commit for two stages.In the first stage, all the data nodes involved will send the ready -made messages to the coordinated node.In the second stage, after receiving the news of all preparations for coordinating nodes, it was decided to submit or roll back the transaction, and notify the results to the participating data nodes. 3. Programming code and related configuration: When using Informix's distributed database, related programming code and configuration need to be performed.The following is a simple example to demonstrate how to create a distributed database table and conduct query operations in Informix. - Create a distributed database table CREATE TABLE customer ( id INTEGER, name VARCHAR(50), email VARCHAR(50) ) DISTRIBUTE BY HASH(id); -An query operation SELECT * FROM customer; The above code first creates a distributed database table called Customer, which includes three fields: ID, name, and email.Distribute by Hash (ID) statement specifies the hash distribution according to the ID field. In terms of configuration, we need to ensure that the network connection between the data nodes is normal and add related node information and index information to the Informix configuration file. in conclusion: Informix's distributed database architecture and principles provide enterprises with strong data processing capabilities.Through reasonable configuration and design, efficient storage and query of data can be achieved.In practical applications, developers need to be programmed and configured in detail according to specific business needs to ensure the stable operation and high performance of the distributed database. Note: The above code and configuration are for reference only. The specific programming and configuration must be adjusted according to the actual environment and requirements.