using Redis to store the session of the Tomcat cluster
Some time ago, I spent a lot of time looking for a way to push the newly developed code to the production system to be able to 0 downtime, and 0 impact on the use of users.
My idea is to use
A Test Background and objectives
Understand the response time and throughput of Redis and memcached under high concurrency conditions, as well as the pressure on the server (including CPU, IO, network), and review the current memcached storage
Redis provides a wealth of commands that allow us to connect to the client for direct manipulation. Here's a quick introduction to some of the most commonly used commands, including strings, lists, collections, ordered collections, hash tables, and
Ubuntu Online Environment installation Redis
sudo apt-get install Redis-server
When the installation is complete, the Redis server starts automatically to see if the process starts properly
Ps-axu|grep redis
redis 18689 0.1 0.4-40136 ?
First, why use Redis.
Because of the distribution of different servers, if you normally store the session, then your session will be saved on a server, if your next request is not to access the server, it will occur when the session is not
hdel key field [field ...]
Deletes one or more specified domains in the hash table key, and the nonexistent fields are ignored.In versions below Redis2.4, Hdel can delete only a single domain at a time, and if you need to delete multiple domains in
About session sharing, there are a lot of articles on the Internet, but very few articles are others have seen, can be practical operation can be realized, I do not know what is missing out of the article or what reason, may be my ability to not
Utilization and protection of Redis unauthorized access vulnerability What is a redis unauthorized access vulnerability?
Redis, by default, is bound to the 0.0.0.0:6379 . If you do not take the relevant security policy, such as adding firewall rules,
First, IntroductionRedis has been learning for a while, and the basics are all fine. Starting today to write about some of the things that are related to Redis and Lua scripting, the Lua script is a good thing that can be run on any platform or
I. The development requirements of the Web2.0 era after the 1.1 of NoSQLWith the rise of the internet Web2.0 website, the traditional relational database in coping with Web2.0 website, especially the super-large-scale and high-concurrency SNS type
RedisAdvantages of Redis:Support for multiple data structures, such as String (string), list (doubly linked list), Dict (hash table), set (set), Zset (sort set), Hyperloglog (cardinality estimation) support persistence operations, can be aof and RDB
First of all, I use the situation:The first used memcache, a server-side cache of key-value pairs, used to store some commonly used data that is not very large, but that requires rapid responseThen, in another place, Redis is used, and then the next
Jedis is a Redis Java client, and spring configures the Redis connection pool as a bean."Redis.clients.jedis.JedisPool", which is a Redis connection pool for stand-alone environments.1. Maven imports the relevant package: redis.clients
This article is applied through the Watch (monitoring) +mutil (transaction) implementation to the relevant scenarios such as distributed high concurrency processing. The bottom of the Redis-cli.exe to test multiple thread modifications, encountered
First step: Add the middleware in the settings.py in the project directory middleware:# Session Middleware Django project is enabled by default session' Django.contrib.sessions.middleware.SessionMiddleware ',The second step: saving the session in
Redis has adopted the new unified protocol since version 1.2 and has become the standard mode for interaction with redis server since version 2.0. The redis protocol is a compromise that balances the following requirements:
Simple
Redis 3.0.0 RC1 version released on November 10.9, release note
This version supports
Redis Cluster I believe many of you have been waiting for a long time. However, this version is only an RC version, so it must be applied to the production
The English version of this article was first published in codeproject: Building a simple URL shorten service with redis
Before reading this article, I suggest you download the source code, read the article, and read the code.
Download the code here:
Directory
1. redis Introduction 2. redis installation and configuration 3. Programming Using redis
1. redis Introduction
0x1: What is redis?
Redis is a nosql-type key-value-based high-speed cache system,
In terms of architecture, redis has three
String Function
GET command/method/function descriptionget the value related to the specified key to obtain the value parameterskeyreturn valuestring or bool: If key didn't exist, false is returned. otherwise, the value related to this key is
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