SENSOR_HOME keyword

The SENSOR_HOME keyword specifies whether to collect the data elements that are related to root segment distribution and store them in the Sensor Data repository of IMS Tools KB. This keyword is effective only for full-function databases.

Functions that support this keyword
Image Copy function
Statements that support this keyword
GLOBAL statement
Site default option
Supported
Related keywords
Format
Read syntax diagramSkip visual syntax diagramSENSOR_HOME=YN
Y
The data elements that are related to root segment distribution are collected and stored in the Sensor Data repository of IMS Tools KB.
The following data elements are collected when SENSOR_HOME=Y:
  • DB_NUM_ROOT_NOHOME
  • DB_PCT_NUM_ROOT_NOHOME
  • DB_AVG_LEN_SYNONYM_CHAIN
N
The data elements that are related to root segment distribution are not collected or stored.
Default value
SENSOR_HOME=Y
Usage note
The data elements that are additionally collected when SENSOR_HOME=Y are useful factors for determining the need of database reorganization. For more information about these data elements, see the topic "GLOBAL command keywords for FF Stand-alone DB Sensor" in the IMS Solution Packs Data Sensor User's Guide.
  • This keyword is effective when SENSOR=Y is specified. SENSOR_HOME=Y is ignored if SENSOR=N is specified or if the SENSOR keyword is not specified.
  • If the key compression option of the Segment Edit/Compression exit routine is specified for the root segment, these additional data elements are not collected even when SENSOR_HOME=Y is specified.
  • If you specify RMNAME=(rand,rap,0,bytes) or if you omit the third operand of the RMNAME parameter in the DBD macro, the number of root addressable area (RAA) blocks is defined as zero in the HDAM or PHDAM DBD. In this case, the additional data elements are not collected even when SENSOR_HOME=YES is specified.
  • When SENSOR_HOME=Y, even if HOMECHK=N is specified, DB Sensor runs as if HOMECHK=(YES,-10,+10) is specified.