Whenever you modify an attribute, be certain that you understand what the results are likely to be in terms of system behavior.HPSS uses the concept of managed objects and attributes for much of the administrative and operational management of the system and its components. Use of managed objects is also common in other kinds of management applications, notably systems and network management. Objects in HPSS represent a generalized view of servers and resources in the storage system, each of these being an object. Obtaining information about HPSS objects and controlling the behavior of these objects can be accommodated.
Viewing HPSS objects and attributes to monitor the HPSS system is, in general, a safe procedure. Modifying attributes, particularly those related to the state of the object, may have serious consequences.
Whenever you modify an attribute, be certain that you understand what the results are likely to be in terms of system behavior.
SSM can register to receive data change notifications from a server. Thus, whenever a particular attribute of an object maintained by the server changes its value, SSM can be sent a notification message containing information about the change. SSM uses this information to update any object attribute values that are displayed in a window up-to-date during system operation.
When a SSM window is opened to display the data of a particular HPSS object, the registration for data change notifications is performed automatically. Corresponding deregistration is performed when the window is closed. Additionally, SSM will automatically register for the operational state of all servers, media, and devices/drives to maintain up to date statuses on the HPSS Health and Status window. When viewing an HPSS managed object window, the Freeze Display toggle button can be turned ON, which prevents updates to the display, Turning off the freeze display button allows data updates to the screen.
A typical HPSS server maintains both a basic and a specific server managed object. Some servers maintain additional managed objects essential to their services.
SSM allows the authorized user to monitor, view and update the following HPSS Information:
• Server Information (See 1.5.3 Monitor the Server Information)
• Storage Classes (See 3.2 Monitoring the HPSS Storage Space)
• Devices and Drives (See 5.1 Monitoring the HPSS Devices and Drives)
• PVL Jobs (See 7.3 Monitoring PVL Jobs)
• PVL Tape Mount Requests (See 7.4 Monitor the PVL Tape Mount Requests)
• PVL Tape Check-In Requests (See 7.16 Monitor the PVL Tape Check-In Requests)
• PVL Volumes (See 7.5 Monitoring PVL Volumes)
• PVR Cartridges (See 7.6 Monitoring the PVR Cartridges)
• Storage Server Volumes (See 7.7 Monitoring Storage Server Volumes)
• Security Information (See 7.8 Monitoring the HPSS Security Information)
• GK Statistics (See 7.9 Monitoring Gatekeeper Statistics)
• LS Statistics (See 7.10 Monitoring the Location Server Statistics)
• NFS Statistics (See 7.11 Monitoring the NFS Statistics)
• DMAP Gateway Fileset Statistics (See 7.12 Monitoring the DMAP Gateway Statistics)
• Log Files (See 7.13 Monitoring HPSS Log Files)
• Bitfiles (See 7.14 Monitoring HPSS Bitfiles)
SSM will set up data change registration operations by default when an information window is open. These windows should be closed when they are no longer needed to curtail unnecessary message traffic.