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Appendix A
Glossary of Terms and Acronyms
Metadata Manager
Metadata Monitor
method
migrate
Migration/Purge Server
mirrored fileset
MM
MMON
mount
mount point
Mount Daemon
Mover
MPS
MRA
MSSRM
MVR
NASA
Name Server
478
The subsystem/component within HPSS responsible for the physical
storage and management of HPSS metadata as well as the transactional
mechanisms for manipulating HPSS meta data. The current Metadata
Manager for HPSS is the Encina SFS product, together with a set of HPSS-
developed application program interfaces (APIs) that provide a layer of
abstraction on top of the Encina SFS data access methods.
A type of HPSS server that is responsible for monitoring the space
utilization of a single Encina SFS process. The Metadata Monitor calculates
the overall amount of disk space being used by SFS and generates alarms
to SSM as appropriate whenever various thresholds are exceeded.
A Java function or subroutine
To copy file data from a level in the file's hierarchy onto the next lower
level in the hierarchy.
An HPSS server responsible for supervising the placement of data in the
storage hierarchies based upon site-defined migration and purge policies.
A DFS fileset whose files are mirrored on HPSS. These files appear in both
the DFS and HPSS name spaces, and so users can access the files from
either place.
Metadata Manager
Metadata Monitor
An operation in which a cartridge is either physically or logically made
readable and/or writable on a drive. In the case of tape cartridges, a
mount operation is a physical operation. In the case of a fixed disk unit, a
mount is a logical operation.
A place where a fileset is mounted in the DFS and/or HPSS name spaces.
An HPSS server object responsible for performing mount request
operations for client systems accessing HPSS data through the HPSS
Network File System (NFS) Daemon.
An HPSS server that provides control of storage devices and data transfers
within HPSS.
Migration/Purge Server
Media Recovery Archive
Mass Storage System Reference Model
Mover
National Aeronautics and Space Administration
An HPSS server that provides a mapping between names and machine-
oriented identifiers. In addition, the Name Server performs access
September 2002
HPSS Installation Guide
Release 4.5, Revision 2
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