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redis string type operation command 1**set key value [ex ss] | [px sss] [nx | xx]** ex ss: Set life cycle, per second px sss: Set up the life cycle in milliseconds If ex,px cannot be written at the same time nx: When the key does not exist, set key operates, otherwise nothing is done. xx: Setkey operation when key exists, otherwise no o ...

Popularization of secondary caching for small group partners Description of two-level caching Afterwards, the small partners in the group developed the announcement function by using the secondary cache. The functions are as follows: <cache name="notice" maxElementsInMemory="100000" eternal="false" overflowToDisk="fals ...

Building Cluster with redis-trib.rbredis-trib.rb is a Ruby-based redis cluster management tool.Common operations such as cluster creation, checking, slot Joey and balancing are simplified by Cluster related commands.Ruby dependency environment needs to be installed before use1. Ruby environment preparationhttps://cache.ruby-lang.org/pub/ruby/2. ...

Introduction - Start with the simplest insertion sort Long, long ago, you might have learned some common sorting algorithms. At that time, computer algorithms were still a bit like math. But I often think about the same kind of questions in my mind. What's the use (the deep contempt of the costume school by the silk practitioners). It's impos ...

There are many distributed locks. redis can also implement distributed locks.http://shangdc.blog.51cto.com/10093778/1914852 (see redis distributed locks)zookeeper Distributed Lock Step:1. Zookeeper is a node, similar to the file directory, so we abstract the lock into a directory. Zookeeper has a node of EPHEMERAL_SEQUENTIAL type. When multiple ...

Summary Redis is the most common Nosql used in our daily development and is a key-value storage system, but redis supports not only key-value, but also many storage types including strings, chain tables, collections, ordered collections, and hashes.There are many open source libraries available in go using redis, and I often use redigo, which e ...

redis single sign-on Recent SSO single sign-on system using redis + spring boot, summarize. In order to satisfy the unified login authentication management of multiple subsystems. User SSO module login, first verify that your username and password are correct, if correct. A unique ticket will be generated. We call it user Accesstoken here. ...

Redis learns 09 multi-database and server commands A Multidatabase Two move library Three Server Command 1 ping 2 echo 3 select 4 quit 5 dbsize 6 info 7 flushdb 8 flushall Redis Learning 09 - Multi-database and Server Command I. Multi-database A Redis instance can contain multiple databases. Each client can specify which d ...

First, two concepts are explained: routing configuration and routing rules. Routing configuration refers to configuring a request path to route to a specified destination address. Routing rules refer to matching to the routing configuration and then making a custom rule judgment. Rule judgment can change the routing destination address. zuul's ...

I. Hash 1.1 Introduction The dictionary in Redis is implemented using a hash table as the underlying implementation, where a hash table has multiple nodes and each node holds a key-value pair. In Redis source files, the implementation code for the dictionary is in dict.c and dict.h files. Redis's database is implemented ...