Restapi-rest-mongo application instance: one of the distributed picture management systems, restservice

I agree with a colleague who recently mentioned that he would like to have pictures on the web in MongoDB.MongoDB has many advantages over storing pictures as files in a subdirectory on your hard disk.First, MongoDB is a distributed database where pictures can be stored across servers.In a clustered environment, the technology of replica set, s ...

Posted on Wed, 21 Aug 2019 18:49:20 -0700 by warrior rabbit

One of Spring's Cores: What does Spring's configuration file do?

The first two articles explained the concepts of IOC and DI and why we need them. This article will continue with the definition of Spring IOC container, xml configuration file, which will clarify two questions: 1. The role of Spring XML configuration files. (Inheritance with IOC thought) 2. If the d ...

Posted on Thu, 08 Aug 2019 19:19:11 -0700 by sader

MongoDB Learning Notes - Introduction to MongoDB, Data Types and Help Commands

MongoDB Learning Notes (1) - Introduction to MongoDB and Data Types The version of MongoDB used in this article is 4.0.10 > db.version(); 4.0.10 Introduction to MongoDB 1. Characteristics of MongoDB MongoDB is a scalable and high-performance NoSQL database written in C++ language. It aims to provide a high-performance scalable data storage s ...

Posted on Tue, 30 Jul 2019 04:08:30 -0700 by daggardan

Introduction to Python Crawler [20]: scrapy, a crawler for all users of Nuggets

Acquiring full-site users, theoretically speaking, from a user as a starting point, we need to crawl the user's attention list, from the attention list constantly superimposed. Open a user's personal center at will The green circle contains all the information we want to gather. Does this user care abo ...

Posted on Fri, 26 Jul 2019 03:02:14 -0700 by WindChill

Introduction to Python Crawler [14]: All IT eBooks Multithread Crawling

Today, we grab a website, this website, the content is related to netizens'messages and replies, particularly simple, but the website is gov. The website ishttp://www.sjz.gov.cn/col/1490066682000/index.html First of all, in order to learn, no malicious crawl information, believe it or not, I do not ha ...

Posted on Tue, 23 Jul 2019 06:07:31 -0700 by bivaughn

Mongodb Operational Grammar

Mongodb Operational Grammar 1.db.collection_name.find(); This sentence queries all data under the connection name and collection_name is the connection name. 2.db.Collection name.find({'_id':'6edc8b4f127411acb78bb221023e04b6'}, {'_id' : 1, 'personId' : 1}); This sentence is conditional query. The f ...

Posted on Mon, 22 Jul 2019 18:31:14 -0700 by natbrazil

Nodejs Road-MongoDB&MySQL

MongoDB 1.1 Overview MongoDB is a database based on distributed file storage. Written in C++ language. The aim is to provide a scalable and high performance data storage solution for WEB applications. MongoDB is a product between relational database and non-relational database, which has the most abundant functions and resembles relational ...

Posted on Mon, 22 Jul 2019 05:51:24 -0700 by bznutz

Mongodb Performance Pressure Measurement

Background In recent days, we have done a thorough benchmark stress test on all the basic components. At present, all of our open source basic components have not been tested for performance. Often, some developers ask how much our RDS and MongoDB cluster can resist. At this time, I can't reply, because I don't know, although one of them can r ...

Posted on Sat, 20 Jul 2019 08:26:14 -0700 by phpn00bf4life

Python crawler novice tutorial: mobile APP data capture pyspider

1. Mobile APP Data - Write in front Continue to practice the use of pyspider, recently searched some of the framework's usage skills, found that the document is difficult to understand, but there is no obstacle to use it for the time being, it is estimated that to write about five tutorials on the fra ...

Posted on Sat, 20 Jul 2019 05:29:18 -0700 by dwnz

Node.js Implementing Simple Crawler

Why did you choose to use node to write crawlers? Just because cheerio is a library that is fully compatible with jQuery grammar, it's really cool to use if you're familiar with it. Dependent Choice cheerio Node.js version of jQuery Http: Encapsulates an HTPP server and a simple HTTP client iconv-lite To solve the problem of scrambling gb2312 ...

Posted on Wed, 17 Jul 2019 12:52:13 -0700 by jackiw