PHP uses Redis to realize Session sharing

Last modified: 16:06:36, May 10, 2019 Preface For small-scale web services, session data is basically stored locally (more local disk files), but when multiple services are deployed and session sharing is required, ensure that each service can share the same session data redis data is stored in memory with good performance. With persistence, da ...

Posted on Wed, 13 Nov 2019 10:20:45 -0500 by cornelombaard

Python crawler architecture 5 template | do you really know how to write crawlers?

Preface The text and pictures of the article are from the Internet, only for learning and communication, and do not have any commercial use. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Author: JAP Jun PS: if you need Python learning materials, you can click the link below to g ...

Posted on Wed, 13 Nov 2019 08:41:48 -0500 by piet

Spring Boot 2.X: use and configuration of Spring Boot Actuator for application monitoring

About activator Activator is the self-examination and monitoring function of the application system provided by Spring Boot. Through the activator, we can use the data indicators to measure the operation of the application, such as checking the disk, memory, CPU and other information of the server, the thread, gc, running status of the system, ...

Posted on Wed, 13 Nov 2019 04:59:22 -0500 by Kifebear

XII. Spring IOC container initialization

IOC container initialization of Spring Preface In the previous section, we analyzed BeanFactory, the lowest IOC container, and then simply analyzed ApplicationContext, a high-level form container. In ApplicationContext, we know a core method, refresh, which is the IOC container initialization process. In the previous section, we did not directl ...

Posted on Tue, 12 Nov 2019 14:01:59 -0500 by manmanman

Concurrent transformation process of a reptile

The thing is like this: because in writing a small program of Douban lottery, I need to grab all the user information forwarded by Douban broadcast, and then extract the lucky audience from these users. Typical IO intensive operation. First, the crawler needs to enter the broadcast to find out how many forwarding pages there are in total, which ...

Posted on Mon, 11 Nov 2019 11:57:00 -0500 by billcoker

High concurrency php uniqid no duplicate unique identifier generation scheme

The PHP uniqid() function can be used to generate unique identifiers that are not repeated, based on the current timestamps in microseconds. In the case of high concurrency or very short interval time (such as cyclic code), there will be a large number of duplicate data. Even if the second parameter is used, it will be repeated. ...

Posted on Mon, 11 Nov 2019 11:19:40 -0500 by basil

Tensorflow output u data [output u id = = I] = input u data [input u id = = I] code analysis

import tensorflow as tf import os os.environ['CUDA_VISIBLE_DEVICES'] = '1' with tf.Graph().as_default(), tf.Session() as sess: input_data = tf.constant([0.1, 0.2, 0.3]) input_ids = tf.constant([3, 1, 6]) output_data = tf.constant([0., 0., 0., 0., 0.]) output_ids = tf.constant([6, 3, 1, 3, 0]) # From TF v1.1 ...

Posted on Sun, 10 Nov 2019 12:48:59 -0500 by cold

Play wechat everyday, Spring Boot develops private instant messaging system

1/ overview Using Spring Boot as the basic framework, Spring Security as the security framework and WebSocket as the communication framework, point-to-point chat and group chat are realized. 2 / dependence required Spring Boot version 1.5.3 uses MongoDB to store data (not required). Maven relies on the following: <properties> <java ...

Posted on Sat, 09 Nov 2019 04:49:06 -0500 by yong

What's a Facade? I hope it's useful for PHPer

What is the Facade? At present, it is a class that is used to facilitate the static method call of the original class (undefined static method).The specific implementation of Facade is as follows:First look at the core document:\thinkphp\base.php`//Register static proxy of core classFacade::bind([ facade\App::class => App::class, facade ...

Posted on Fri, 08 Nov 2019 04:22:41 -0500 by unbreakable9

When a database stores data, why are there logical duplicate records?

In many exceptional cases, such as high concurrency and bad network, there are occasional duplicate records in the database. If you have a Book table, it looks like this +----+--------------+ | id | name | +----+--------------+ | 1 | A Brief History of the World | +----+--------------+ In exceptional cases, the following records ma ...

Posted on Thu, 07 Nov 2019 21:30:42 -0500 by speedamp