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This article describes how to use Redis on the following hosting packages:
  • Managed VPS
  • Managed Dedicated server
  • Turbo shared and reseller hosting accounts
Redis is an open-source memory object caching system that web sites can use to help accelerate page load times. Redis caches in RAM frequently accessed data, such as the results of API calls, database calls, and more. Redis can significantly help improve site performance.

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Managed VPS and Dedicated servers

Redis is installed and ready to use on managed VPS and managed Dedicated servers.

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Connection parameters

You can connect to Redis using the following parameters:
  • Hostname: localhost
    👍 Tip Alternatively, you can use the IP address 127.0.0.1.
  • Port: 6379

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Diagnostics

To verify Redis is running, type the following command:
You can also use the redis-cli program to connect to Redis directly. For example, the following commands demonstrate how to use_redis-cli_ to dump all of the cached key-value pairs, and then display rolling statistics for Redis:
To clear the entire Redis cache at once, type the following command:

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Code sample

There are numerous PHP libraries available for integration with Redis. The following procedure demonstrates how to use the Predis library to connect to Redis and store a key/value pair:
  1. Log in to your server using SSH.
  2. At the command prompt, type the following commands:
  1. Using your preferred text editor, create a file named redis-test.php. Copy and then paste the following code into the redis-test.php file:
  1. Save your changes to the redis-test.php file.
  2. Type the following command to run the script:
  1. You should receive the following output:
To confirm the key/value pair is stored in the Redis cache, type the following command:
For more information about how to use PHP with Redis, please visit https://redis.io/docs/latest/develop/clients/php/.

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Turbo shared and reseller hosting accounts

To connect to Redis on a Turbo shared hosting account, use the following Unix socket path. Replace username with your own account username: /home/username/.redis/redis.sock To verify that the Redis socket is active for your account, type the following command. Replace username with your own account username:
If you receive a No such file or directory error message, then the socket has not been activated for your account yet. To do this, type the following command:
The server checks for this file every five minutes, and starts the Redis process for the account if it does not already exist. After five minutes, run the ls command above again, and you should see the redis.sock file in the directory listing.
ImportantBefore you try to use Redis with PHP on your account, make sure the correct PHP extension is enabled. To do this, follow these steps:
  1. Log in to cPanel.
  2. In the SOFTWARE section of the cPanel home screen, click Select PHP Version.
  3. In the list of PHP extensions, confirm that the Redis check box is selected. (If you do not see a list of PHP extensions, click the Extensions tab.)

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Code sample

The following PHP code demonstrates how to connect to Redis and store a key-value pair in the cache.
ImportantIf you run this code, remember to replace username with your own account username.
When you run this script, you should receive the following output:
To confirm the key/value pair is stored in the Redis cache, type the following command:
Note that you must explicitly provide the socket path to redis-cli, or the command will fail.

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Using Redis with web applications

A frequent use for Redis is to help improve performance in a CMS (content management system) like WordPress or Drupal. Redis can also help accelerate performance in e-commerce applications like PrestaShop or Magento:
  • For information about how to configure WordPress to use Redis, please see this article.
  • For information about how to configure Drupal to use Redis, please see this article.
  • For information about how to configure Joomla to use Redis, please see this article.
  • For information about how to configure PrestaShop to use Redis, please see this article.
  • For information about how to configure Magento to use Redis, please see this article.

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More information