A system, referred to as the bunker host, with connectivity to the bunker SRL. The bunker host can be a relatively low-tier host, because it does not need to support running the application, but is used only to track and replay the writes to the bunker SRL.
If the Primary will replicate to the bunker SRL using IP, the bunker host is required at all times.
If the Primary will replicate to the bunker SRL using the
STORAGE protocol, the bunker host is required only in the case of a Primary failure, to replay the pending writes from the bunker SRL to the Secondary. However, you must know the IP address at the time of setup.