refer only to B<DEF>s and B<CDEF>s previously defined in the same graph command.
=item B<RRA:>I<CF>B<:>I<cf arguments>
-
+
+
The purpose of an B<RRD> is to store data in the round robin archives
(B<RRA>). An archive consists of a number of data values or statistics for
each of the defined data-sources (B<DS>) and is defined with an B<RRA> line.
=back
-=head1 Aberrant Behaviour detection with Holt-Winters forecasting
+=head1 Aberrant Behavior Detection with Holt-Winters Forecasting
by Jake Brutlag E<lt>jakeb@corp.webtv.netE<gt>
=item Mail Messages
-Assume you have a methode to count the number of messages transported by
+Assume you have a method to count the number of messages transported by
your mailserver in a certain amount of time, this give you data like '5
messages in the last 65 seconds'. If you look at the count of 5 like and
B<ABSOLUTE> datatype you can simply update the rrd with the number 5 and the
temperatures supplied for 100 hours (1200 * 300 seconds = 100
hours). The second RRA stores the minimum temperature recorded over
every hour (12 * 300 seconds = 1 hour), for 100 days (2400 hours). The
-third and the fourth RRA's do the same with the for the maximum and
+third and the fourth RRA's do the same for the maximum and
average temperature, respectively.
=head1 EXAMPLE 2