vb.org Archive - MySQL replication

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chefy

11-06-2012 11:43 AM

MySQL replication

Hi,

I have configured a slave mysql server and replication is now running. I got it working by the mysql shell. Now I noticed that in config.php there is a section where you can enter the details of your mysql slave server:

Code:

        //        ****** SLAVE DATABASE CONFIGURATION ******

        //        If you have multiple database backends, this is the information for your slave

        //        server. If you are not 100% sure you need to fill in this information,

        //        do not change any of the values here.

$config['SlaveServer']['servername'] = '';

$config['SlaveServer']['port'] = 3306;

$config['SlaveServer']['username'] = '';

$config['SlaveServer']['password'] = '';

$config['SlaveServer']['usepconnect'] = 0;

Should I fill that information? What is the purpose of doing that? Is it intended to distribute the load of my mysql master server to my mysql slave server?

Thanks.

kh99	11-06-2012 12:25 PM

If you want to enable that feature, you also need to add '_slave' to $config['Database']['dbtype'] (which should be near the top of the file).

I'm not a database admin person, but my understanding is that if you set up the config.php to use a slave, the slave will be used for most "read" operations, which speeds things up because writing and updating causes delays. I could be wrong but I don't believe vbulletin makes any attempt to direct requests to one server or the other to balance the load.

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