#Digitalocean install mysql ubuntu 14.04 update

Advanced configuration Creating a tuned configuration This allows for much more reliable data recovery as data consistency can be checked.Īs of MySQL 5.5 InnoDB is the default engine, and is highly recommended over MyISAM unless you have specific needs for features unique to that engine. To meet ACID compliance all transactions are journaled independently of the main tables. Data caching is also handled in memory within the database engine, allowing caching on a more efficient row level basis rather than file block. That means multiple updates can occur on a single table simultaneously. Write locking can occur on a row level basis within a table. InnoDB is a more modern database engine, designed to be ACID compliant which guarantees database transactions are processed reliably. The following link provides some points for consideration about using MyISAM on a production database. It also lacks journaling, which makes it harder for data to be recovered after a crash. As any application that uses the table scales this may prove to be a hindrance.

#Digitalocean install mysql ubuntu 14.04 update

This means only one process can update a table at a time.

However MyISAM is only capable of locking an entire table for writing. MyISAM also supports the FULLTEXT data type, which allows very fast searches of large quantities of text data. Some web applications have been tuned around MyISAM (though that’s not to imply that they will be slower under InnoDB). It can be faster than InnoDB under certain circumstances and favours a read-only workload. While it is possible (and may be advantageous) to mix and match database engines on a table level, doing so reduces the effectiveness of the performance tuning you can do as you’ll be splitting the resources between two engines instead of dedicating them to one. MySQL will handle things differently under the surface, but regardless of which storage engine is in use, you will interact with the database in the same way.Įach engine has its own advantages and disadvantages. Storage engines are transparent to the end user. There are two main storage engines that you’ll be interested in: InnoDB and MyISAM. These methods are referred to as either database or storage engines. MySQL is designed to allow data to be stored in different ways. Whilst the default configuration of MySQL provided by the Ubuntu packages is perfectly functional and performs well there are things you may wish to consider before you proceed. Replace 192.168.0.5 with the appropriate address, which can be determined via the ip address show command.Īfter making a configuration change, the MySQL daemon will need to be restarted with the following command: sudo systemctl restart rvice For example, to configure MySQL to listen for connections from network hosts, in the file /etc/mysql//mysqld.cnf, change the bind-address directive to the server’s IP address: bind-address = 192.168.0.5 You can edit the files in /etc/mysql/ to configure the basic settings – log file, port number, etc. If the server is not running correctly, you can type the following command to start it: sudo service mysql restartĪ good starting point for troubleshooting problems is the systemd journal, which can be accessed from the terminal prompt with this command: sudo journalctl -u mysql When you run this command, you should see something similar to the following: LISTEN 0 151 127.0.0.1:mysql 0.0.0.0:* users:(('mysqld',pid=149190,fd=29)) The network status of the MySQL service can also be checked by running the ss command at the terminal prompt: sudo ss -tap | grep mysql Oct 08 14:37:38 db. systemd: Started MySQL Community Server.

Oct 08 14:37:36 db. systemd: Starting MySQL Community Server. └─2028 /usr/sbin/mysqld -daemonize -pid-file=/run/mysqld/mysqld.pid Loaded: loaded (/lib/systemd/system/rvice enabled vendor preset: enabled)Īctive: active (running) since Tue 14:37:38 PDT 2 weeks 5 days ago Which should provide an output like the following: You can quickly check its current status via systemd: sudo service mysql status Once the installation is complete, the MySQL server should be started automatically. To install MySQL, run the following command from a terminal prompt: sudo apt install mysql-server It is intended for mission-critical, heavy-load production systems and mass-deployed software. MySQL is a fast, multi-threaded, multi-user, and robust SQL database server. Multi-node configuration with Docker-Composeĭistributed Replicated Block Device (DRBD)