FloatingLizenz

FloatingLizenz, or floating license, is a software licensing model that allows a predefined number of concurrent instances to run across a network. A central license server manages a pool of licenses that can be checked out by any eligible client workstation or user. When a program starts, it requests a license from the server; if a license is available, it is issued for a lease period and the session can proceed. When the program exits or the lease expires, the license is returned to the pool for use by others. If no licenses are available, subsequent requests may be queued or blocked until a license becomes free.

The system typically consists of a license server (vendor daemon) and a license file that defines products, quantities, host identifiers, and time limits. Clients run software with a license source pointing to the server. The model supports mobility of licenses within an organization and reduces the need to purchase a separate license for every user or device. It can also enable license borrowing in some implementations, allowing use while disconnected from the server for a limited period.

Advantages include cost efficiency for fluctuating demand, centralized control, and easier compliance reporting. Drawbacks include network dependency, potential downtime if the server fails, and the need for careful management of license pools to avoid contention.

Applications include engineering, computational analysis, and design software in enterprises, universities, and research institutions. Common implementations use license managers such as FlexNet Publisher, Reprise License Manager, and other vendor-specific systems.