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Showing posts from October, 2019

Change default_authentication_plugin for MySQL 8.0.18 in Docker

Change default_authentication_plugin for MySQL 8.0.18 in Docker container running on Red Hat Enterprise Linux: You have just bring up the the MySQL 8.0.18 container and realized default_authentication_plugin is caching_sha2_password and not mysql_native_password. And would like to change, here are the steps Identify Docker container using command docker ps -a: #docker ps -a CONTAINER ID        IMAGE                               COMMAND                  CREATED             STATUS                  PORTS                              NAMES e5b5f47e87b7        mysql/mysql-server:8.0.18           "/ mysq…"   4 days ago          Up 4 days (healthy)     3306/tcp, 33060/tcp                mysql_8.0.18_1 Change my.cnf file for container mysql_8.0.18_1: Connect shelll access to MySQL container: #docker exec -it <container_name> bash #docker exec -it mysql_8.0.18_1 bash At this point you will realized you don't vi editor so let us install it, it will install  vi

MySQL Tablespace | System Tablespace | General Tablespace | InnoDB File per Tablespace

System Tablespace: System tablespace store doublewrite buffer and the change buffer It could also have table and index data in case tables are created in the system tablespace and not using file-per-table or general tablespaces Previous version of MySQL have system tablespace contained the InnoDB data dictionary From MySQL 8.0, metadata is stored in the MySQL data dictionary The system tablespace can have one or more data files By default data file named ibdata1 is created for single system tablespace in the data directory. The size and number of system tablespace data files can be configured using parameter innodb_data_file_path in the config file at startup option Note: There are limitations for increasing and decreasing the size of the System Tablespace. Refer General Table Space Features: Store data for multiple tables, similar to system table space It is a shared tablespace. Server keeps