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In Detailed structure of nginx event module In, we explain the overall workflow of the event module of nginx, and focus on the role of each method of organizing the event module. This paper mainly focuses on the entire process, and explains the implementation details of the event module of nginx from the source point of view. 1. ngx_events_bloc ...

IO multiplexing The client program processes multiple socket s. (e.g. non blocking connect) The client program processes both user input and network connections. (e.g. chat program) The server should handle listening socket and connecting socket at the same time. The server processes both TCP and UDP ...

Article directory 1: Adapter mode 1.1 adapter mode 1.1.1 precautions and details of type 1 adapter mode 1.2 object adapter mode 1.2.1 precautions and details of object adapter mode 1.3 interface adapter mode (default adapter mode) 2: Adapter mode considerations and details 1: Adapter mode Basi ...

Recently, when working on background management projects, I encountered a problem that I used the high-resolution meter to read the identity card information (Nada high-resolution meter) and then integrated it on the page. At that time, I was confused about how to integrate the hardware interaction i ...

date: 2020-01-11 15:51:39 Some time ago, my tutor asked me to know about the GreenPlum database. Later, I installed and used it for a while. It felt like it was no different from other databases, so it ended up. Now go over the features of GPDB and try to use them. In fact, I really need to understand t ...

How to use python and nodejs to build a remote monitoring system without saying anything. 1. Platform and Environment Python 3.6, opencv3.0 or above (or some functionality in cv2 is unavailable) nodejs8.9.4 relies on the following { "name": "video", "version": "1.0.0", "description": "Simple live video program", "m ...

WINDOWS SOCKET programming example Important points: Server side Client Code See? You don't need to know the ip and port of the client in the whole process of socket programming at the code level. The following protocol stack will detect it by itself. But socket is actually to use the client's ip a ...

Guidance: Author: Zheng Songhua, Zhi Shu Tang's SQL Optimized Class Teacher, Net Name: Rabbit Riding Tortoise Today, I would like to share some articles about not in, not exists.In fact, this can be summarized as exists to in, which was treated differently in previous versions of mysql until version 8.0.16. Prior to version 16, in could be op ...

1.Redis single command usage scenario The following steps are required for a Redis client to connect to a Redis server to execute a command: The above process is called Round Trip Time (RTT), and the mget and mset commands save RTT, but most commands do not support batch operations. Redis provides services through TCP, Client initiates r ...

Following Remember a blood case caused by passing a file handle once After that, the demo triggered another blood case, which is now recorded below. This time I'm testing file handle transfer on linux, which does not have a STREAMS system. The handle is therefore passed using the control message part in sendmsg/recvmsg of the unix domain socke ...