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ziplist source code analysis of Redis 1, ziplist introduction From the previous analysis, we know that ziplist (compressed list) is used for the underlying storage of quicklist. Since the compressed list itself has many contents, we reopened this article. Before the official source code, we should first look at the characteristics of ziplist: ...

1. Priority of message If there is a requirement now, we need to push some of the highest priority notifications to the client. We can use the sortedset of redis or the message priority attribute of rabbit we are going to talk about today Producer code using RabbitMQ.Client; using System; using System.Collections.Generic; using System. ...

We talked about the migration of our dubbo service from redis to Nacos registry. After the migration, we found that an exception of ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: would be thrown from time to time. Therefore, with this analysis process, we found out that the exception is our SLB network mapping proble ...

redis basic learning   redis Redis is an open source (BSD licensed) in memory data structure storage system, which can be used as database, cache and message middleware yum install redis 1.yum installation #The premise is to configure alicloud yum source and epel source #Check whether there is redis package yum list redis ...

session viscosity Each request is allocated according to the hash result of the access ip, so that each visitor accesses a back-end server, which can solve the session problem. upstream backserver { ip_hash; server 192.168.0.14:88; server 192.168.0.15:80; } But there are disadvantages. There is a single risk. If I have logged in on port 192.1 ...

Mysql and Redis operations Mysql development Install mysql and create test library Create table mysql> CREATE TABLE `user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `name` varchar(20) DEFAULT '', `age` int(11) DEFAULT '0', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4; mysql> insert into user (name,age)va ...

The gcc environment is installed on the system (otherwise, compiling redis will cause errors).Still don't know how to install the gcc environment offline viewable Install gcc environment offline under CentOS with detailed graphics download Click on the official address to download redis for Linux http://download.redis.io/releases/redis-5.0.4.ta ...

I. Preface Select is the most frequently used in the database, and it is basically the same every time. update, delete and insert are not used as frequently as select, and they are basically different every time. In order to reduce the pressure of the database, it is necessary to use cache for select. In the past, Ehcache was ...

Because HttpServletRequest in preHandle only has setAttribute, no setParameter and no add method So there is no way to add parameters directly. I checked a lot of data from the Internet, basically speaking, I need to rewrite HttpServletRequestWrapper Just do what you say. Check the blog on the Internet to see how others can realize it. Maybe be ...

1.API Interface Design Specification https://github.com/mishe/blog/issues/129 2. Security Design a. Whitelist restrictions Accept only the request response from a specific system, the caller's IP address needs to be reported in the system, otherwise it cannot be invoked b. Validation of legitimate identity Basic Authentication: This ...