Appendix A Glossary of Terms and AcronymsHPSS Installation Guide September 2002 473Release 4.5, Revision 2a virtual volume is a cluster.configuration The process of initializing or modifying various parameters affecting thebehavior of an HPSS server or infrastructure service.configuration file An Encina Structured File Server (SFS) file that stores informationdefining HPSS server operating parameters, storage characteristics,policies, devices and drives, and other information.COS Class of Servicedaemon A UNIX program that runs continuously in the background, lyingdormant until some condition is met.Data Server A Storage System Management (SSM) component that provides the bridgebetween the System Manager and the Graphical User Interface (GUI).DCE Distributed Computing Environmentdebug A log record message type used to log lower-level error conditions. Thedefault logging policy is to log debug messages.DEC Digital Equipment Corporation.delog The process of extraction, formatting, and outputting HPSS central logrecords.deregistration The process of disabling notification to SSM for a particular attributechange.descriptive name A human-readable name for an HPSS server.device A physical piece of hardware, usually associated with a drive, that iscapable of reading or writing data.DFS The Distributed File Service is a system that joins local files systems of FileServer machines, making the file systems available globally.DFS/HPSS fileset A fileset that is represented in both DFS and HPSS.directory An HPSS object than can contain files, symbolic links, hard links, andother directories.dismount An operation in which a cartridge is either physically or logically removedfrom a device, rendering it unreadable and unwritable. In the case of tapecartridges, a dismount operation is a physical operation. In the case of afixed disk unit, a dismount is a logical operation.DMAP Gateway A server that acts as a gateway between DFS or XFS and HPSS. The serverrelays requests between HPSS and the HPSS/DMAP server.DMAPI The Data Management APIs defined by the XDSM specification. TheseAPIs allow a Data Management Application to monitor events on files,and provide special interfaces to manage the data in the files.
