X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=doc%2Frrdcreate.pod;h=27ef702afd5097ca94e08e13c2b49cb01c3d0559;hb=a6d79528b4812e8eb3927dba3cdd42e6ca51b287;hp=7173c1d96753b53b7b523777543ea9500e36d5bb;hpb=56f6cd55670eeef120d50999e6b7b19f4459577a;p=rrdtool.git

diff --git a/doc/rrdcreate.pod b/doc/rrdcreate.pod
index 7173c1d..27ef702 100644
--- a/doc/rrdcreate.pod
+++ b/doc/rrdcreate.pod
@@ -180,7 +180,9 @@ B<RRA:>I<AVERAGE | MIN | MAX | LAST>B<:>I<xff>B<:>I<steps>B<:>I<rows>
 
 I<xff> The xfiles factor defines what part of a consolidation interval may
 be made up from I<*UNKNOWN*> data while the consolidated value is still
-regarded as known.
+regarded as known. It is given as the ratio of allowed I<*UNKNOWN*> PDPs
+to the number of PDPs in the interval. Thus, it ranges from 0 to 1 (exclusive).
+
 
 I<steps> defines how many of these I<primary data points> are used to build
 a I<consolidated data point> which then goes into the archive.
@@ -200,7 +202,7 @@ flagging aberrant behavior in the data source time series:
 
 =item *
 
-B<RRA:>I<HWPREDICT>B<:>I<rows>B<:>I<alpha>B<:>I<beta>B<:>I<seasonal period>B<:>I<rra-num>
+B<RRA:>I<HWPREDICT>B<:>I<rows>B<:>I<alpha>B<:>I<beta>B<:>I<seasonal period>[B<:>I<rra-num>]
 
 =item *
 
@@ -548,4 +550,4 @@ RPN expression handles the divide by zero case.
 
 =head1 AUTHOR
 
-Tobias Oetiker E<lt>oetiker@ee.ethz.chE<gt>
+Tobias Oetiker E<lt>tobi@oetiker.chE<gt>