Concurrent User/Desktop Licensing
The concurrent user/desktop licensing model is ideal for environments where a large number of users access the servers every day, but only a small subset of this user population accesses the servers concurrently – i.e., at the same time. For example, in a university, you could have thousands of students coming in every day; but, every time a class is in session, you will have a few students accessing their desktops simultaneously to attend the class. If you opt for the named user/desktop licensing model here, you will have to obtain licenses for all the users who log into their desktops each day; this may prove to be expensive. The concurrent user/desktop licensing model on the other hand, will be more cost-effective in such environments, as you will have to obtain a license for only those users who access their desktops concurrently and/or those desktops that are powered-on but have not been accessed by any user.
Like named user/desktop licensing, Concurrent user/Desktop licensing too is applicable to Thin Client, VDI , and cloud-hosted desktop environments only. If this option is enabled, you can monitor any number of Citrix XenApp servers, Microsoft RDS servers, VMware Horizon RDS servers, 2X Terminal servers, and/or VDI and cloud-hosted desktop environments without any monitor licenses, provided the maximum number of unique users/desktops on these servers every day during the last 14 days is within a stipulated license limit.
At configured intervals (default: 30 minutes), the eG manager automatically computes the total number of users who accessed all the managed Thin Client components, hypervisors hosting virtual desktops, and cloud hosted virtual desktops. Likewise, it also counts the total number of powered-on desktops on the managed hypervisor/cloud desktop components that have not been accessed by a user during the configured period. The total number of concurrent users/desktops is computed and stored every 30 mins (by default) and at the end of the day, the maximum value for the day is determined.
This maximum number is compared with the licensed number of concurrent users/desktops to capture violations (if any). If this license is violated in any 7 out of the last 14 days, the eG agents will stop executing the following tests:
- The application-level tests mapped to the managed Citrix XenApp, Microsoft Terminal, VMware Horizon RDS, and 2X Terminal servers;
- All the inside-view tests of the VDI components (hypervisors hosting virtual desktops)
- A few outside-view tests of the VDI components
This implies that the host-level tests of these components will continue to run and report metrics.
Moreover, after the seventh violation (in 14 days), you will not be able to add/manage any additional thin client, VDI, or cloud desktop components until you obtain additional concurrent user/desktop licenses. For every license violation that occurs in the last 14 days, eG sends mail alerts to the users regarding the license violation.