Here are the common terms that this document uses:
appender
a named entity that
represents a specific output destination for messages. Destinations
include fixed files, rolling files, operating system facilities, client
applications, database tables, message queues, and custom Java classes.
You can configure appenders by specifying thresholds, filters, log
directories and filenames, pattern layouts, and other parameters that
control how messages are written to the destination.
filter
a set of character
strings or thresholds, or a combination of strings and thresholds
that you specify. Log events are compared to the filter to determine
whether they should be processed.
level
the diagnostic level
that is associated with a log event. The levels, from lowest to highest,
are TRACE, DEBUG, INFO, WARN, ERROR, and FATAL.
log event
an occurrence that
is reported by a program for possible inclusion in a log.
logger
a named entity that
identifies a message category. Loggers are named using a hierarchical
system that enables you to configure logging at a broad or a fine-grained
level.
The logging facility
includes a set of high-level loggers for SAS servers, including Audit,
Admin, App, IOM, and Perf. Some loggers are subdivided into lower-level
(child) loggers. For example, the Audit logger has descendant loggers
called Audit.Meta and Audit.Authentication, and Audit.Meta has descendant
loggers called Audit.Meta.Security and Audit.Meta.Updates. The Root
logger is the highest-level logger and does not represent a specific
message category.
Loggers inherit settings
from their higher-level (ancestor) loggers.
logging configuration
an XML file or a set
of SAS program statements that determines how log events are processed.
You use the logging configuration to assign thresholds to loggers,
to configure appenders, and to specify which categories and levels
of log events are to be written to each appender.
If you perform a planned
deployment, then the SAS Deployment Wizard provides default logging
configuration files for your SAS servers.
message category
a classification for
messages that are produced by a SAS sub-system. Message categories
for the logging facility are administrative messages, application-specific
messages, audit messages, IOM messages, and performance messages.
pattern layout
a template that you
create to format messages. The pattern layout identifies the types
of data, the order of the data, and the format of the data that is
generated in a log event and is delivered as output.
threshold
the lowest event level
that is processed. Log events whose levels are below the threshold
are ignored.