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catalogue Redis redis application scenario Install compile & & start redis storage structure Five data structures of Redis string string basic command string storage structure Application of string data type in redis list list basic command list storage structure list application hsah Basic command storage struct ...

etcd Server startup overview The startup of etcd server includes two parts: The main process of etcdServer, which directly or indirectly includes many core components such as raftNode, WAL and snapshot, can be understood as a container; The other is raftNode, which encapsulates the implementation of the internal Raft protocol and exposes ...

PostgreSQL PostGIS - getting started example introduce Spatial data is an important kind of data. The software used in our daily life, such as map navigation, taxi software, restaurant recommendation and takeout express, are closely related to spatial data. Spatial data usually has complex structure and large amount of data. For the analysis ...

Preface: introduce a simple MyBatis encryption and decryption method. This method is rarely mentioned in daily study and work, so let's talk about it. If you already know this method, ignore this article 1, Background Sometimes in our database, some sensitive information of users, such as mobile phone number, bank card and other information, ...

Hello, everyone. I'm Xiaoyan youcong noodles. Recently, I always use MongoDB database, which is really convenient. When you deploy the program, you always use database migration and backup. Today we will summarize briefly. Welcome to share and share (code word is not easy, I hope you can identify the source). Please correct it if there is somet ...

Gaode map API official website: Gaode open platform | Gaode map API . Since the blogger is developed based on the front-end Vue framework, the map JavaScript API * * * * is introduced in combination with Vue. 1, Case effect 2, Development preparation It should be noted that if you want to use JS API, you must register an account and ...

0. All my software download directories are in the software directory mkdir -p /usr/local/fastdfs cd /usr/local/fastdfs/ 1. Install gcc on Linux machine yum -y install cmake make gcc-c++ 1, Install core library 1.1 installation version #Official website https://github.com/happyfish100 fastdfs-6.06.tar.gz libfastcommon-1.0.43.tar.gz fa ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python actual combat quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 background Recently, a self-developed Dubbo registration center in charge often received alarms about CPU utilization, so it carried out a wav ...

inout parameter mode of Oracle Stored procedures and functions in Oracle can have parameters. The types of parameters can be specified as in, out and in out modes. IN: used to pass IN parameters When calling a procedure, the arguments are passed to the procedure Within a procedure, formal parameters are treated as read-only and cannot be chang ...

The customer in this case is from a provincial telecom. A large number of ORA-00600[4187] errors in alert logs have affected the normal operation of the business.Fri Nov 19 16:07:09 2021Errors in file /u01/oracle/app/oracle/diag/rdbms/lcfa/LCFA1/trace/LCFA1_smon_5811.trc (incident=184182): ORA-00600: internal error code, arguments: [41 ...