By default, the SAP HANA database lifecycle manager (HDBLCM) uses SSH during SAP HANA system installation or update install the SAP Host Agent on all system hosts. In order to use SSH, the SFTP subsystem must be active. Once the SAP Host Agent is installed, it is used to perform any platform LCM tasks executed from the Web user interface or as the system administrator user <sid>adm.
It was only possible to perform multiple-host system tasks by providing root credentials and executing platform on remote hosts via secure shell (SSH). Since SAP HANA Support Package Stack (SPS) 09, it has been possible to perform platform LCM tasks without root credentials by using the SAP Host Agent.
Even though the SAP Host Agent is not required to be installed on the SAP HANA system, the SAP HANA database lifecycle manager (HDBLCM) heavily relies on it for the following functionality to work:
●Execution as the system administrator user <sid>adm
●Connectivity to remote hosts via HTTPS (when no SSH or root user credentials are available)
●Execution from the SAP HANA database lifecycle manager Web user interface