SNAX/XF LU Network Services Manual

Performance Consideration - ESS Table Allocation
Application Example
097841 Tandem Computers Incorporated 3–15
Configuration Suggestion It is desirable to keep the number of ESS tables used to a minimum. An installation
requiring what might seem to be many ESS tables that, for example, differ only in the
LU’s GATELU specification can be configured so that the number of ESS tables
required drops dramatically.
For this example, most of the ESS tables can be eliminated by specifying the
ASSOCIATE attribute with the SCF ADD command for the gateway LU, and
specifying a generic ESS table (SCF) for a group of LUs.
The example below shows an initial configuration, followed by an example
reconfiguration used to decrease the number of ESS tables required for the same
number of LUs.
Original Configuration Example
First, the SCF configuration for secondary objects (gateway to host) and primary
objects (connected to terminal):
Secondary objects:
LINE $ABC123
PU #PU001
LU #T01234, PASSTHRU ON
LU #T05678, PASSTHRU ON
Primary objects:
LINE $DEF456
PU #PU002
LU #T01234, ESSTABLE T01234
LU #T05678, ESSTABLE T05678
The values specified for ESSTABLE T01234 and ESSTABLE T05678 are identical,
except for the GATELU specification. The following SNAXUTL commands show how
they are configured. For T01234:
ADD ESSCMD LOGON, CMDTYPE LOGON-CHAR, SENDHOST Y,
GATELU $ABC123.#T01234
and for T05678:
ADD ESSCMD LOGON, CMDTYPE LOGON-CHAR, SENDHOST Y,
GATELU $ABC123.#T05678