What are the implementation methods of multi-server load balancing in PHP7.0?

What are the implementation methods of multi-server load balancing in PHP7.0?

In network application design and development, if a single server cannot meet the needs of all users, multiple servers need to be used to handle access requests. This can better handle multi-tasking, multi-user and high-traffic situations. In order to realize this function, load balancing technology came into being, and there are a variety of load balancing implementation methods in PHP7.0:

1. Load balancing based on HTTP protocol

1. LVS ：Linux Virtual Server is a high-performance, scalable and reliable server group solution. It uses multiple real servers as a virtual server to provide services to the outside world. It can distribute requests from clients to different real servers for processing and achieve load balancing.
2. HAProxy: It is a high-performance load balancer that performs load balancing based on TCP/HTTP protocol. Using HAProxy, client requests can be evenly distributed to back-end servers, thereby improving system availability and scalability.
3. Nginx: It is also a high-performance load balancer and an HTTP server. In terms of load balancing, Nginx supports a variety of load balancing strategies, such as polling, IP hashing, minimum number of connections, etc. Nginx can be used together with HAProxy, etc., or as a front-end server and back-end server to achieve seamless load balancing.

2. Load balancing based on application layer protocols

1. PHP-Resque: A Redis-backed PHP library for creating asynchronous task queues. Multiple worker processes can be run to perform tasks. PHP-Resque will automatically distribute tasks to available worker processes and ensure that each worker process executes an equal number of tasks to achieve load balancing.
2. Doctrine: A high-performance PHP object-relational mapping (ORM) tool that supports load balancing through multiple database connections. Doctrine splits the query into multiple parts, sends them to different databases, executes them separately, and finally merges the result sets to achieve load balancing.

The above is the implementation of multi-server load balancing in PHP7.0. Of course, different environments and needs will have different suitable load balancing solutions. Only by selecting, deploying and using it according to the actual situation can you better realize high-performance and high-availability applications.

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