Comparison of ts and nts in php

How much do you know about ts and nts in php? This article introduces to you the comparison between ts and nts in php. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. help.

1. Introduction

ts(Thread-Safety):That is, thread safety. When accessed by multiple threads, a locking mechanism is used. When a thread accesses certain data of this class, it is protected and other

threads cannot access it. Only when the thread finishes reading, can other threads use it. There will be no data inconsistency or data pollution. Choose this version when php is loaded in ISAPI mode. Choose this version when php is loaded in ISAPI mode.

nts(None-Thread Safe):

That is, it is not thread-safe, that is, it does not provide data access protection. It is possible that multiple threads change the data one after another, causing the result to be dirty Data, choose this version when php is running in fast cgi mode, which has better performance; It runs in the form of a server module and was proposed by Microsoft, so it can only run on the win platform, such as apache and iis under win [it is said that the fast cgi method is more stable], while php on Linux Run as Apache module or php-fpm.

                                                                                                                   cgi (Common Gateway Interface): A tool for the HTTP server to "talk" to your program or that of other machines. To put it bluntly, cgi is a background Language that can communicate with the server. At this time, php is running as an independent program. The characteristic is that it consumes memory.

Fast cgi:

is a long-live CGI. It can be executed all the time. As long as it is activated, it will not take time to fork every time. This This method is a CGI open extension with a language-independent, scalable architecture. Its main behavior is to keep the CGI interpreter process in memory and thus obtain higher performance.

Find the difference between cgi and fast cgi.

2. Select

Usually php and apache are combined under win and run in isapi mode, while under linux it can be apche php, and php is often used as a module of apache. When nginx php is used, phpfast cgi runs, that is, php-fpm.

It is said that php-fpm releases the web server so that it only handles requests and concurrency, while php processing is completed by php-fpm. Therefore, nginx php is now very popular. I have not tested it!

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