Can I have 2 MySQL servers?
It is possible to use a different MySQL server binary per instance, or use the same binary for multiple instances, or any combination of the two approaches. For example, you might run a server from MySQL 5.7 and one from MySQL 8.0, to see how different versions handle a given workload.
How do I run multiple MySQL servers on the same computer?
Here are the steps to run multiple MySQL instances on same machine.
- Open MySQL configuration file. Typically, you will find MySQL configuration file at /etc/mysql/my.
- Configure multiple MySQL instances. You will find the default MySQL configuration something similar to what is shown below.
- Manage multiple instances.
How do I connect to multiple databases?
PHP code to connect multiple MySQL server,multiple database simultaneously
- You must always have a two-step approach for this.
- open connection to both the servers from PHP script.
- query first server with first connection.
- query second server with the second server.
- fetch the resultant rows.
Can you run multiple servers using the same data directory?
If (despite this warning) you run multiple servers using the same data directory and they have logging enabled, you must use the appropriate options to specify log file names that are unique to each server. Otherwise, the servers try to log to the same files.
How to set up multiple data directories in MySQL?
5.8.1 Setting Up Multiple Data Directories Each MySQL Instance on a machine should have its own data directory. The location is specified using the –datadir= dir_name option. There are different methods of setting up a data directory for a new instance:
When do I need to run multiple MySQL servers?
However, if you need to run multiple servers on a more permanent basis, it is more convenient to use option files to specify for each server those option values that must be unique to it. The –defaults-file option is useful for this purpose.
How to set up multiple instances of MySQL?
After an installation has been performed using an MSI package, the template data directory can be copied to set up additional MySQL instances. With this method, any MySQL accounts or user data present in the data directory are carried over to the new data directory.