TPDC Manual (H06.03+, J06.03+)

Using the Collected Data
Tandem Performance Data Collector (TPDC) Manual—529899-002
3-12
Entity Relationships
Entity Relationships
Entries within each TPDC entity are assigned a unique artificial 32-bit identification.
These identifiers have “-LINK” as the final portion of their name to indicate that the
attribute or data field is a linkage or relationship.
TPDC’s data collection entities come from these sources:
•
Twenty are derived from Measure entities.
•
Eight are used for ASCII name spaces.
•
Nine are obtained from the NonStop operating system.
•
Three are obtained from disk directories.
•
One is created for file names.
•
One is obtained from several entities.
•
One is a derived artificial name tuple.
•
One is created for time management.
Linkage Between Entities
Existence linkages are used to relate one entity to another by value. That is, related
entities contain the entityname-LINK field and value of a related entity. For example, an
occurrence of DISCOPEN contains the linkage field PROCESS-LINK with a value of
10. The PROCESS occurrence with an identification field (PROCESS-LINK) with a
CLUSTER CPU CONTROL DEVICE CACHE DISK
LDISC PDISC DISCOPEN DISKFILE FILE LINE
NETLINE OPDISK PROCESS SQLPROC SQLSTMT SYSTEM
TERMINAL TMP
GNAME FLABNME LDEVNME NODENME PROCNME RUNME
TPDCNME USERNME
KCCB LDEV LDEVDST LDEVNUM MACHINE NODE
NODENUM PPD USERNUM
ALTK LABEL PART
FLABNME
TIMETPL
FLABNME
TIME