If your application is handling hundreds of thousands of concurrent requests multiplexed on many backend servers, you probably need a way of optimizing querying and preventing downtime. ProxySQL helps you to do this through query caching and routing while at the same time providing a firewall that will sit between your applications and database to protect the database.

The LDAP server is designed to locate organizations, individuals and other resources such as file and devices in the network; public internet or the organization intranet. It is mostly used by organizations for centralized authentication email and phone directories.

As a PHP developer, you may bump into applications that require older versions. This may also include the packages and frameworks which may not support the same versions of PHP. This requires multiple installations of PHP and find a way to switch between them.

OpenLiteSpeed is an open source web server characterized by high-performance, light-weight event-driven architecture, and Apache compatible rewrite rules. It also has a very user-friendly WebAdmin GUI for easy creation of multiple sites on one server. Here, we show how to install LiteSpeed Web Server on Ubuntu 18.04 Linux VPS.