Service provisioning at the host and network levels

Host failure

If hostB1.designcenter_b.com fails, and bld stops running, a candidate License Scheduler host must take over the license management. The next host on the HOSTS list in both Design Center A and Design Center B is hostB2designcenter_b.com. License Scheduler fails over to this host if it is up and running.

Network failure

If the network connection between Design Center A and Design Center B breaks, Design Center A can no longer communicate with the hosts in Design Center B, so hostB1.designcenter_b.com and hostB2.designcenter_b.com are no longer candidate license scheduling hosts for Design Center A. The next candidate host for Design Center A is hostA1.designcenter_a.com. License management then runs locally in Design Center A on hostA1.designcenter_a.com. In Design Center B, hostB1.designcenter_b.com continues to run License Scheduler, but only manages the local network if the wide area network connection is down.

The local License Scheduler host, hostA1.designcenter_a.com, checks for a heartbeat from hostB1.designcenter_b.com at regular intervals, then returns license management back to hostB1.designcenter_b.com when the network connection returns.