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Appendix A Glossary of Terms and Acronyms
482 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
SSM Storage System Management
SSM session The environment in which an SSM user interacts with SSM to monitor and
control HPSS through the SSM windows. SSM itself may be running
without any sessions active. When an SSM user starts up Sammi and logs
in, an SSM session begins and lasts until the user logs off. It is possible to
have multiple sessions accessing the same SSM.
stage To copy file data from a level in the file’s hierarchy onto the top level in the
hierarchy.
start-up An HPSS SSM administrative operation that causes a server to begin
execution.
status A log record message type used to log processing results. This message
type is being used to report status from the HPSS Accounting process. The
default logging policy is to log the status messages and send them to SSM
to be displayed in a pop-up window. Separate windows are displayed for
each unique request. The message text within the pop-up window will
update when additional messages are received for a particular request.
STK Storage Technology Corporation
storage class An HPSS object used to group storage media together to provide storage
for HPSS data with specific characteristics. The characteristics are both
physical and logical.
storage hierarchy An ordered collection of storage classes. The hierarchy consists of a fixed
number of storage levels numbered from level 1 to the number of levels in
the hierarchy, with the maximum level being limited to 5 by HPSS. Each
level is associated with a specific storage class. Migration and stage
commands result in data being copied between different storage levels in
the hierarchy. Each Class of Service has an associated hierarchy.
storage level The relative position of a single storage class in a storage hierarchy. For
example, if a storage class is at the top of a hierarchy, the storage level is 1.
storage map An HPSS object managed by the Storage Server and used to keep track of
allocated storage space.
storage segment An HPSS object managed by the Storage Server and utilized by the Bitfile
Server to provide storage for a bitfile or parts of a bitfile.
Storage Server An HPSS object that provides control over a hierarchy of virtual and
physical storage resources.
Storage Subsystem A portion of the HPSS namespace that is managed by an independent
Name Server, Bitfile Server, Migration/Purge Server, and an appropriate
combination of Disk and/or Tape Storage Servers.
Storage System An HPSS component that provides monitoring and control of HPSS via a
Management (SSM) windowed operator interface. SSM has three components: (1) the System
Manager, which communicates with all other HPSS components requiring
monitoring or control, (2) the Data Server, which provides the bridge