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preface The advantages of Redis database over other non relational databases mainly lie in its rich data types, supporting key value, hashes, strings, sets (ordered, unordered), list and other data types 1, String data type String is the most basic type of redis. It can store up to 512MB of data String type is binary safe, that is, ...

Mapping of simple types Returns a simple base type Definition in interface int getAdminCount();//How many pieces of data are returned to the database Specific implementation in xml <select id="getAdminCount" resultType="int"> select count(*) from admin </select> Here I chose a jar package for testing, whi ...

Master MySQL installation from the root, and so on. Installing other c/c + + software through source code on linux platform is similar. ​ one   Installation mode The installation package of linux is divided into RPM package, binary package and source package. Different installation methods have their own advantages and disadvantages. Compa ...

1, Test scheme Test in a virtual machine (first verify the scheme and configuration, and then deploy to K8S)Master1, port 3310, name mysqlm1, configuration file / opt/mysql/conf/mysqlm1.cnf, database directory / opt/mysql/m1databases, REPLICATION, user name m1slave, password 123456Master2, port 3311, name mysqlm1, configuration file / opt/ ...

return of SaltStack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, MongoDB, Redis, Memcache, etc. through return, we can record each operation of SaltStack and provide a data source for future ...

Share some previous projects and accumulate some project experience We talked about how to configure the scratch redis earlier. This time, we'll do a collection example The website is the other shore map network: https://pic.netbian.com/4kmeinv/ analysis Collect all the pictures under the above link classification, analyze the website is 148 ...

DML language Data manipulation language Inserting: insert ing Modify: update Delete: delete 1, Insert statement 1. Mode 1 (common) Syntax: insert into table name (field 1,...) values (value 1,...); characteristic: The type of the inserted value should be consistent or compatible with the type of the column The order of columns can be reverse ...

GO language -- migrate from MySQL database to Amazon DynamoDB 1, Foreword The blogger is learning the Go language. It happens that the Leader asked to study whether the migration from MySQL database to DynamoDB can be realized by script This blog post is a simple migration implemented by bloggers using Go language, because the code is no ...

summary The dict dictionary in Redis can be understood as a hash linked list of an upgraded version of the mapping relationship between key and value. The emergence of dict dictionary is to solve the search problem in the algorithm. In the actual development, the search mainly makes two structures: the tree using Map structure and hash table. ...

1. return of saltstack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, MongoDB, Redis, Memcache, etc. through return, we can record each operation of SaltStack and provide a data source for future l ...