EMS Manual

Configuring EMS
EMS Manual—426909-005
12-23
Template Files
If you omit the EMSFLAGS parameter or the entire paragraph from the configuration
file, the default selection criterion for $Z0 is CRITICAL-ONLY ON. If the
SYSTEM_PROCESS_MODIFIERS paragraph includes EMSFLAGS, you can set b as:
0 CRITICAL-ONLY OFF BLOCKING OFF
2 CRITICAL-ONLY ON BLOCKING OFF
4 CRITICAL-ONLY OFF BLOCKING ON
6* CRITICAL-ONLY ON BLOCKING ON
* default value for EMSFLAGS
After system generation, the value of b does not change until you reset it and another
system generation takes place. You can use the EMSCCTRL program to change the
BLOCKING attribute or selection criterion.
b represents the low-order bits in a word that includes internal flags for EMS. Set
EMSFLAGS to the values of 0, 2, 4, or 6 (1, 3, and 5 are no longer used).
Template Files
The template files are installed automatically by the INSTALL process. But first, include
this entry in the ALLPROCESSORS paragraph of the SYSGEN configuration file:
FORMATTER_TEMPLATE_FILES TANDEM^FORMATTER^TEMPLATE^FILES;
TANDEM^FORMATTER^TEMPLATE^FILES is a macro defined in the CONFAUX file
created by the INSTALL process. For more information about template files, see the
DSM Template Services Manual.
Log File Operation
A successful strategy for managing log files is critical to the successful operation of
EMS. This subsection describes how collectors create and access log files and how
they retain log-file and collector attributes through logging interruptions. This
information—along with that under Log Files on page 12-3, and Logging Integrity on
page 12-17—can help you choose an appropriate logging strategy for your installation.
Collector Context
The EMS collectors make log-file management easier by using default values for
attributes and by maintaining context information in a file on disk.
Primary Collector Context
The primary collector’s overall context is kept in a file named
$SYSTEM.SYSTEM.ZZEVCONF. The ZZEVCONF context files, on
$SYSTEM.SYSTEM and on individual log subvolumes, contain a ZEMS-EVT-
FILESWITCH event message that includes the collector’s status at the time it last
switched log files. This status is kept in a token called ZEMS-MAP-COL-STATUS.