Chapter 2 HPSS Planning
122 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
HPSS Dynamic Variables for each Subsystem. Table 2-6 defines the HPSS dynamic variables
associated with each HPSS subsystem. All systems will have a “primary subsystem” and this
sectionof the spreadsheet must be completed. Values for subsystem #2 and #3 will need to be filled
out only if additional subsystems are planned. Many of these variables contribute significantly to
the size of the metadata estimate.
Table 2-5 HPSS Dynamic Variables(Subsystem Independent)
Variable Description
Total Number of
Users Defines the total number of users in the HPSS system. This value is used in
conjunction with “Avg. Number of Levels Per Hierarchy” to define the size of
accounting records.
Avg. Number of
Levels Per
Hierarchy
This value is the average number of levels defined in the hierarchies. For most
hierarchies which are defined as disk and tape, this value would be 2.
Global Number of
Filesets The total number of filesets that will be managed by all Name Servers in a given DCE
Cell.
Max Filesets Per
DMAP Gateway This value is the maximum number of filesets that a DMAP Gateway can be expected
to manage. This value can have an impact on the overall storage sizing estimate.
Max Queued PVL
Jobs The maximum number of jobs that might be queued in the PVL at any one time.
Avg. Activities Per
PVL Job EachPVL job has one or more activities associated with it (mount tape #1, mount tape
#2, etc. for a 2-way tape stripe). This variable defines the average number of PVL
activities per PVL job, which should represent the average stripe width for tape virtual
volumes.
Total PVR #1 Tape
Cartridges The spreadsheet allows up to three PVR’s to be defined, each with a different number
of cartridges. This field represents the maximum number of cartridges that will be
managed by PVR #1.
Total PVR #2 Tape
Cartridges Ifa second PVR will be used, enter the maximum number of cartridges managed by the
second PVR; otherwise, use zero.
Total PVR #3 Tape
Cartridges If a third PVR will be used, enter the maximum number of cartridges managed by the
third PVR; otherwise, use zero.