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1, Overview of relational database and non relational database 1. Relational database Relational database is a structured database, which is created on the basis of relational model (two-dimensional table model) and is generally record oriented. SQL statement (standard data query language) is a language based on relational database, whic ...

1 installation Download the compressed package on the official website of Redis: Use Xftp to put the Redis compressed package in the / opt directory and use the command: tar -zxvf Redis-6.2.2 tar. GZ decompression. Because Redis is implemented based on C + +, it needs to rely on two additional packages: GCC and gcc-c + +. Use the commands ...

Introduction and comparison of a common redis client Jedis api online web address: http://tool.oschina.net/uploads/apidocs/redis/clients/jedis/Jedis.html Redisson website address: https://redisson.org/ redisson git project address: https://github.com/redisson/redisson Letuce website address: https://lettuce.io/ Letuce git project ad ...

Introduction and optimization process of simple second kill system windows native hardware configuration: 8-core 32G linux server hardware configuration: 2-core 4G Foreword, the optimized simple second kill system does not involve distribution, so naturally there are no technical points such as master-slave replication. Here, we should a ...

1, Analysis of shopping cart data model in E-commerce Functions realized in shopping cart: add shopping cart, view shopping cart, edit shopping cart sku, edit commodity data, select multiple commodities in shopping cart to settle, view the total number of commodities in shopping cart, delete shopping cart, share shopping cart, etc Current sho ...

1, Relational database and non relational database 1 relational database Relational database is a structured database, which is created on the basis of relational model (two-dimensional table model) and is generally oriented to records. SQL statement (standard data query language) is a language based on relational database, which is used ...

1, General characteristics of redis The subscript of redis supports both positive and negative numbers+ 1 represents the first element- 1 indicates the last to last element. So you can make good use of this feature to traverse. For example, list, lrange list 1 -1 can traverse the list.Redis's scope is a closed interval. Unlike java's, the scop ...

What is the purpose of redis distributed lock to solve? In order to solve the problem that synchronized can not achieve synchronization in distributed situations, because synchronized synchronization is the method of one jvm, which can not be done by multiple JVMs. 1. Implement the inventory reduction scenario of redis basic business Integer ...

Install redis https://redis.io/download cd /opt wget http://download.redis.io/releases/redis-6.2.3.tar.gz yum install gcc-c++ tar xzf redis-6.2.3.tar.gz mv /opt/redis-6.2.3 /usr/local/redis cd /usr/local/redis make make PREFIX=/usr/local/redis install Setup of master-slave redis mode cd /opt mkdir redis-sentinel cd redis-sentinel m ...

1, Redis installation download Redis 1. Decompress, compile and install # Decompress, compile and install (odc) [mca@clu01 software]$ tar -xvf redis-6.2.6.tar.gz (odc) [mca@clu01 software]$ cd redis-6.2.6/ (odc) [mca@clu01 redis-6.2.6]$ make (odc) [mca@clu01 redis-6.2.6]$ cd src (odc) [mca@clu01 src]$ sudo make install 2. Director ...