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Frequently Asked Questions

Is the LiteSpeed Cache plugin free?

Yes, this LSCache plugin will always be free and open source. That said, a LiteSpeed server is required, and there are fees associated with some LiteSpeed server editions.

What server software is required for this plugin?

A LiteSpeed server is required in order to use this plugin. You will need one of the following (any single server or cluster including one of these will work):

  • LiteSpeed Web Server Enterprise with LSCache Module (v5.0.10+)
  • LiteSpeed WebADC (v2.0+)

  • OpenLiteSpeed (v1.4.17+)

Can I use this plugin with OC1.x?

No. LSCOC cannot support OC1.x because our cache plugin relies on the event component which is only available after OC2.0.

What is the difference between the LSCache Module for LiteSpeed Web Server (requires a license) and the LSCache plugin (free)?

The LSCache Module is built into your licensed copy of LiteSpeed Web Server. When it comes to caching dynamic content, the LSCache Module does all of the work.

The LSCache plugin is simply an interface. It allows the web app to instruct the server Module on what to cache, how long to cache it, and when to purge. And it allows the site owner to manage and configure the Module. Without the Module, the Plugin could not function.

A licensed LSCache Module is required in order to use the free LSCache plugin.

Does this plugin work in a clustered environment?

The cache entries are stored at the LiteSpeed server level. The simplest solution is to use LiteSpeed WebADC, as the cache entries will be stored at that level.

If using another load balancer, the cache entries will only be stored at the backend nodes, not at the load balancer.

The purges will also not be synchronized across the nodes, so this is not recommended.

If a customized solution is required, please contact LiteSpeed Technologies at


The rewrite rules created by this plugin must be copied to the Load Balancer.

Does LiteSpeed Cache for OpenCart work with OpenLiteSpeed?

Yes, but it works slightly differently than Enterprise. OpenLiteSpeed does not support ESI, and so Shopping Cart module and Wishlist module ESI requests are replaced with AJAX. No other ESI modules may be used with OpenLiteSpeed.

Does LiteSpeed Cache for OpenCart have a crawler?

Yes, the Rebuild All LiteSpeed Cache button in the LiteSpeed Cache Admin triggers a crawler, which reads your sitemap file and refreshes those pages that have expired.

How can I install the LiteSpeed Cache Plugin?

The LiteSpeed Cache plugin works right out of the box with default settings that are appropriate for most sites. Please refer to the installation instructions to learn how to get started.

How do I know if LSCache is Working?

You can verify that LiteSpeed Cache is working by using the browser's developer tools, as described in Verify Your Site is Being Cached.

Last update: July 10, 2021