Automatic restart management (ARM)
WebSphere Application Server for z/OS uses
the z/OS automatic restart management (ARM) to recover
application servers. Each application server running on a z/OS system
(including servers you create for your business applications) are
automatically registered with an ARM group. Each registration uses
a special element type called SYSCB, which ARM treats as restart level
3, assuring that RRS restarts before any application server.