=head1 NAME
-rrdtool update - Store a new set of values into the rrd
+rrdtool update - Store a new set of values into the RRD
=for html <div align="right"><a href="rrdupdate.pdf">PDF</a> version.</div>
The template switch allows you to specify which data sources you are
going to update and in which order. If the data sources specified in
-the template are not available in the rrd file, the update process
+the template are not available in the RRD file, the update process
will abort with an error message.
While it appears possible with the template switch to update data sources
from the template the I<*UNKNOWN*> value.
Do not specify a value for a COMPUTE B<DST> in the B<update> function. If
-this is done accidently (and this can only be done using the template switch),
+this is done accidentally (and this can only be done using the template switch),
B<RRDtool> will ignore the value specified for the COMPUTE B<DST>.
=item B<N>|I<timestamp>B<:>I<value>[B<:>I<value>...]
B<DERIVE> or B<ABSOLUTE>.
The remaining elements of the argument are DS updates. The order of this list is
-the same as the order the data sources were defined in the rra.
+the same as the order the data sources were defined in the RRA.
If there is no data for a certain data-source, the letter
-B<U> (eg. N:0.1:U:1) can be defined.
+B<U> (e.g., N:0.1:U:1) can be defined.
The format of the value acquired from the data source is dependent of the
data source type chosen. Normally it will be numeric, but the data acquisition
Update the database file demo1.rrd with 3 known and one I<*UNKNOWN*>
value. Use the current time as the update time.
-C<rrdtool update demo2.rrd 887457267:U 887457521:22 88745790:2.7>
+C<rrdtool update demo2.rrd 887457267:U 887457521:22 887457903:2.7>
Update the database file demo2.rrd which expects data from a single
data-source, three times. First with an I<*UNKNOWN*> value then with two