RocketMQ Transaction Message Details for Distributed Transactions

Zhang Shenyaohttps://blog.csdn.net/weixin_34452850/article/details/88851419 Transaction messages are a very important feature provided by RocketMQ. They are open source after version 4.x and can be used to easily implement distributed transactions.This article gives a detailed description of the transaction messages for RocketMQ and gives a c ...

Posted by fael097 on Sun, 23 Feb 2020 18:55:37 -0800

Turn your Archlinux into a router

I got back an industrial control board with J2900 double Gigabit ports (odd model) for soft routing, but I wanted to use all kinds of skins, install a desktop environment with VNC, and I didn't have a cold on the virtual machine (and this U doesn't support through yet), so I had to give up all the router systems.As an Arch iron powder, in purs ...

Posted by vikaspa on Sun, 23 Feb 2020 08:31:13 -0800

A global unique id algorithm of 1 million generated per second by self-study

background The System tps is 3000, distributed deployment is adopted, and the business order number needs to be globally unique, such as order number. There are many common distributed global id schemes on the Internet, including the following: UUID redis atomic self increasing zookeeper node directo ...

Posted by Bleej on Sun, 23 Feb 2020 02:06:09 -0800

Data structure and algorithm Series III (array)

1. introduction 1.1. Why study data structure and algorithm? Some people say that data structure and algorithm, computer network, and operating system are the same, away from daily development, except for the interview may not be used in this life! Some people say that I do business development. As long as I am proficient in API, framework ...

Posted by shatteredroses on Sat, 22 Feb 2020 19:54:12 -0800

Deploy Ethereum smart contract (Hello World)

Ethereum is a public blockchain platform that provides a smart contract function. To develop an application on Ethereum, you need to install Geth based on Go language on its client. The official website is: https://github.com/ethereum/go-ethereum. 1. Enter the command line window 2. Enter in the command line window geth --datadir "E:\geth ...

Posted by stockton on Sat, 22 Feb 2020 06:03:32 -0800

Java web crawler Foundation

Catalog 1, Use URL class 2, Use HttpURLConnection to send GET request 3, Use HttpURLConnection to send POST request 4, Download case Compared with python, Java crawler is a bit more complex. A few lines of python code can grab a web page. Java may need dozens of lines or even more, so python has m ...

Posted by curtisdw on Sat, 22 Feb 2020 05:09:06 -0800

Section 9: JWT introduction and security verification based on JWT with JS+WebApi as an example

I. Introduction 1. background There are many problems in traditional Session based verification, such as Session expiration, excessive server overhead, inability to deploy in a distributed way, and unsuitable for projects with front-end and back-end separation. Traditional token based verification ...

Posted by twmcmahan on Sat, 22 Feb 2020 02:59:29 -0800

Realization of mail transmission in physical isolation environment based on james

background In order to protect the network security of high security level, the State Security Bureau issued the physical isolation requirements for the classified network on December 27, 1999, and promulgated and implemented the regulations on the confidentiality management of the international networking of computer information system on Jan ...

Posted by sith717 on Fri, 21 Feb 2020 04:40:10 -0800

Detailed tutorial of thingsboard source installation and deployment

QQ group communication If there are other problems with the installation, you can go to QQ group for help Environmental installation Development environment requirements: JDK version 1.8 PostgreSQL 9up Node.js Npm Maven 3.6 up Git tools Idea development tools JDK Download and install Official down ...

Posted by thedualmind on Fri, 21 Feb 2020 00:59:54 -0800

ElitesAI · hands on deep learning PyTorch version - the third time to punch task01

1, Batch normalization and residual network 1.1 batch normalization Standardization of inputs (shallow models) The mean value and standard deviation of any feature after processing on all samples in the data set are 0 and 1. Standardized processing of input data makes the distribution of each featu ...

Posted by lorenzo-s on Thu, 20 Feb 2020 23:55:15 -0800