Appendix A Glossary of Terms and Acronyms478 September 2002 HPSS Installation GuideRelease 4.5, Revision 2Metadata Manager The subsystem/component within HPSS responsible for the physicalstorage and management of HPSS metadata as well as the transactionalmechanisms for manipulating HPSS meta data. The current MetadataManager for HPSS is the Encina SFS product, together with a set of HPSS-developed application program interfaces (APIs) that provide a layer ofabstraction on top of the Encina SFS data access methods.Metadata Monitor A type of HPSS server that is responsible for monitoring the spaceutilization of a single Encina SFS process. The Metadata Monitor calculatesthe overall amount of disk space being used by SFS and generates alarmsto SSM as appropriate whenever various thresholds are exceeded.method A Java function or subroutinemigrate To copy file data from a level in the file’s hierarchy onto the next lowerlevel in the hierarchy.Migration/Purge Server An HPSS server responsible for supervising the placement of data in thestorage hierarchies based upon site-defined migration and purge policies.mirrored fileset A DFS fileset whose files are mirrored on HPSS. These files appear in boththe DFS and HPSS name spaces, and so users can access the files fromeither place.MM Metadata ManagerMMON Metadata Monitormount An operation in which a cartridge is either physically or logically madereadable and/or writable on a drive. In the case of tape cartridges, amount operation is a physical operation. In the case of a fixed disk unit, amount is a logical operation.mount point A place where a fileset is mounted in the DFS and/or HPSS name spaces.Mount Daemon An HPSS server object responsible for performing mount requestoperations for client systems accessing HPSS data through the HPSSNetwork File System (NFS) Daemon.Mover An HPSS server that provides control of storage devices and data transferswithin HPSS.MPS Migration/Purge ServerMRA Media Recovery ArchiveMSSRM Mass Storage System Reference ModelMVR MoverNASA National Aeronautics and Space AdministrationName Server An HPSS server that provides a mapping between names and machine-oriented identifiers. In addition, the Name Server performs access
