EMS Manual

Configuring EMS
EMS Manual—426909-005
12-6
Log Files

Alternate collector attributes have default values assigned by the collector when
you start the collector, unless you include a value for an attribute as a RUN
command parameter.
You can change the value of most log file and collector attributes after a collector is
running by using the SPI CONTROL command or the EMSCCTRL program.
BACKUP (Alternate Collector only)
This attribute determines whether the alternate collector runs as a process pair. The
value of this attribute must be a valid CPU number on the node where the alternate
collector is running. It must not be the same CPU number as the alternate collector’s
primary CPU. The value of this attribute is not saved in the ZZEVCONF file. If this
attribute is not specified as a RUN command parameter, there is no backup alternate
collector, and the collector does not run as a process pair. You cannot change this
attribute once the alternate collector has started.
BLOCKING
The collector writes messages to log files. The collector either writes messages one at
a time or writes a number of messages to a buffer and then writes the entire group of
messages to the log file. The process of writing a group of messages to a buffer is
known as blocking. Blocking significantly increases the speed at which messages are
Table 12-1. Log File Attributes and Their Default Values
Attribute
Primary Collector
Default Values Alternate Collector Default Values
BACKUP Not applicable Not applicable
BLOCKING ON ON
DEFAULTSUBVOL Not applicable LOGSUBVOL
DISCACCESSID Super ID Logon ID of user starting collector
EOFREFRESH TRUE TRUE
LOGSUBVOL $SYSTEM.ZLOGnn DEFAULTSUBVOL (or =_DEFAULTS)
MAXFILE 4 4
NEXTLOGFILE FALSE FALSE
POOLPAGES Not applicable 64 pages
PRIMARYEXTENT 20 20
PROTECTION COOO COOO
REPLYAFTERWRITE Not applicable FALSE
ROTATEFILES TRUE TRUE
SECONDARYEXTENT 100 100
WRITETHRUCACHE FALSE FALSE