Enable redundant license server hosts

Configuring multiple license server hosts is optional. It provides a way to keep LSF running if a license server host goes down. There are two ways to configure multiple license servers.

A permanent license key is tied to a particular license server host with a specific host ID. If that host is down, the license service is not available and LSF becomes unlicensed if the master LIM is shut down or restarted.

To prevent down time, you can configure three hosts as license server hosts. The license server daemon (lmgrd) and LSF vendor license daemon (lsf_ld) run on each license server host. With three redundant server hosts, if any one host is down, the other two continue to serve licenses. If any two hosts are down, the license service stops.

  1. Obtain a license file that contains three SERVER lines. You must provide the following information for each license server host:
    • Host name and FlexNet host ID

  2. Specify the location of all the licenses in LSF_LICENSE_FILE, not just one. Use a comma (,) to separate each location or configure the full path of the license file. List the primary license server host first (the one you want LSF to contact first).
  3. Start lmgrd on all license server hosts, not just one.
  4. To allow the new permanent licenses to take effect, reconfigure the cluster with the commands:

    lsadmin reconfig

    badmin mbdrestart