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How to set up High Availability WordPress with HyperDB

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WordPress is the most well-liked content material administration system obtainable out there. From prime 1 million web sites on this world, greater than 25% use WordPress to handle the content material. It means, WordPress is a scalable content material administration system. If you end up getting greater than 100ok guests in a month, you want Excessive availability WordPress occasion. There are lots of methods to enhance the provision of your WordPress website.

On this information, I’ll present you How one can arrange WordPress to make use of mysql replication utilizing HyperDB. Initially, What’s HyperDB? and what’s MySQL replication? Let me clarify you about each these items briefly.

What’s MySQL Replication?

In easy phrases, replication right here means replication of database or databases from one machine to a different. On this case, you may arrange a master-slave replication in MySQL to repeat all the info from grasp to slave immediately. It implies that all of your knowledge is obtainable on two servers as a substitute of only one.

Now, as now we have our knowledge on two servers, we will divide the load between two servers. In case of master-slave replication, you may solely insert, replace or delete knowledge in grasp server, slave server will merely copy the info from grasp server. It implies that we will use slave server to run READ queries (Each time a person requests some web page) and we will use grasp server to run write queries (Everytime you publish a content material or replace one thing).

It implies that now the load is on two servers as a substitute of 1. For instance, In case your grasp server crashes, you received’t be capable to replace something from the admin panel however your website will nonetheless be stay as a result of it’s studying knowledge from Slave server.

What’s HyperDB?

HyperDB is a drop-in plugin of WordPress. It implies that you shouldn’t have to put in HyperDB by including a brand new plugin. It’s only a PHP file that it’s important to add inside your WordPress set up listing, I’ll present you precisely carry out this activity.

Utilizing HyperDB, we will allow WordPress to make use of totally different servers for various sort of queries. For instance, we will allow WordPress to make use of Grasp server to run insert, replace and delete queries whereas Slave server to make use of learn queries each time a person requests the info.

It implies that relying on the kind of question, WordPress will use the servers we point out within the HyperDB drop-in plugin. It is extremely straightforward to arrange. You’ll be able to set it up in 10 minutes when you get used to it. Lastly, Let’s begin with the information.


In an effort to observe this information, It’s essential to have a WordPress website configured in your server. If you happen to haven’t configured your server but, I like to recommend you to observe our tutorial to arrange a number of wordpress websites on single host. Even if you’re simply going to host a single website proper now, It might be helpful so that you can arrange your server this fashion.

And, it’s essential to have MySQL replication in place. If you happen to haven’t carried out this activity, observe our information to arrange master-slave replication or master-master replication in MySQL.

You’ll be able to both arrange WordPress first or arrange replication first. The order doesn’t matter on this case. Our guides are created with this concern in thoughts.

As soon as you might be performed establishing your WordPress website and replication, you may transfer ahead.

Excessive Availability WordPress utilizing HyperDB

I’ve divided precise HyperDB configuration in three steps. In step one, we’ll obtain and extract the HyperDB plugin from WordPress. So, Let’s do it.

Obtain HyperDB

To Obtain HyperDB, execute the next instructions in your WordPress server. Be sure to are on the residence listing of the present person. If you wish to go to residence listing, merely execute the cd command in your terminal. As soon as you might be within the residence listing, execute the next instructions.

$ sudo apt-get set up unzip -y  $ wget https://downloads.wordpress.org/plugin/hyperdb.zip  $ unzip hyperdb.zip

As soon as the obtain is full, now we have to maneuver the information obtainable contained in the hyperdb listing to our WordPress set up listing.

Transfer and Replace db-config.php

Now, Let’s transfer and replace our db-config.php file to our WordPress set up listing. Similar to wp-config.php file, db-config.php file will include all of the details about all of the database servers related with the WordPress website.

Execute the next command to maneuver the db-config.php file to the WordPress set up listing.

$ sudo mv ~/hyperdb/db-config.php /var/www/example-site.com/db-config.php

After transferring a file, execute the next command to open a file in edit mode.

$ sudo nano /var/www/example-site.com/db-config.php

Now, discover DB_HOST and ignore the primary prevalence. We simply must replace the second prevalence. The default configuration will appear to be the next.

/**   * This provides the identical server once more, solely this time it's configured as a slave.   * The final three parameters are set to the defaults however are proven for readability.   */  $wpdb->add_database(array(          'host'     => DB_HOST,     // If port is aside from 3306, use host:port.          'person'     => DB_USER,          'password' => DB_PASSWORD,          'identify'     => DB_NAME,          'write'    => 0,          'learn'     => 1,          'dataset'  => 'international',          'timeout'  => 0.2,  ));  

Replace the host directive from DB_HOST to SLAVE_HOST. As soon as performed, press CTRL+X adopted by Y adopted by Enter to save lots of the file. Now, we additionally must replace our wp-config.php file.

We’ve so as to add the slave host, which might be the personal IP in case your servers are in personal community or Public IP in case your servers aren’t in personal community. Execute the next command to append the wp-config.php with the definition of SLAVE_HOST.

$ echo "outline('SLAVE_HOST','IP_ADDRESS_OF_SLAVE');" | sudo tee -a /var/www/example-site.com/wp-config.php

Exchange the coloured half within the code. It’s a one line command so as to add one line on the finish of the wp-config.php file. You can too open the file in edit mode and add the road manually, it doesn’t make any distinction.

Transfer db.php to wp-content

Within the final step, we simply have to maneuver the db.php file from hyperdb listing to our WordPress set up’s wp-content listing. Execute the next command to maneuver the file.

$ sudo mv ~/hyperdb/db.php /var/www/example-site.com/wp-content/

And that’s all! Now, our WordPress set up is Excessive Availability as it should learn knowledge from our slave server and write knowledge to the grasp server.


Conclusion: Because the visitors on the WordPress website grows, now we have to ensure that our WordPress website is obtainable 24*7 with out downtimes. Even 60 minutes of downtime could cause an enormous injury to our website’s repute. Step one I like to recommend you to take to scale your WordPress website is to host the database on totally different server. Then, you may arrange HyperDB to additional enhance the provision, efficiency and monitoring.

The toughest and most time consuming factor on this course of is establishing the MySQL replication. HyperDB configuration for Excessive Availability WordPress may be very straightforward and quick. So, when you get used to it, it is possible for you to to configure HyperDB in minutes. When you’ve got any questions of queries, please use the remark part given under. If you’re utilizing WebHostingPeople VPS, you can even contact our Assist division for help.

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