From 65c3cfc65d68cb8ad49dfa6af8052b953bfe81f6 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Wed, 9 May 2001 05:31:01 +0000
Subject: [PATCH] Bug fix: when update of multiple PDP/CDP RRAs coincided with
 interpolation of multiple PDPs an incorrect value was stored as the CDP.
 Especially evident for GAUGE data sources. Minor changes to rrdcreate.pod. --
 Jake Brutlag <jakeb@corp.webtv.net>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@36 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 NEWS              |  1 +
 doc/rrdcreate.pod |  5 +++--
 src/rrd_update.c  | 10 ++++++++--
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/NEWS b/NEWS
index febb618..19fed3e 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,7 @@ RRDTOOL NEWS
 In this file I am noting the Major changes to rrdtool
 for details check the cvs ChangeLog
 
+
 2001/03/10 Jake Brutlag <jakeb@corp.webtv.net>
   Support for COMPUTE data sources (CDEF data sources). Removes the RPN
   parser and calculator from rrd_graph and puts then in a new file,
diff --git a/doc/rrdcreate.pod b/doc/rrdcreate.pod
index 74cfa34..b43f70a 100644
--- a/doc/rrdcreate.pod
+++ b/doc/rrdcreate.pod
@@ -161,7 +161,8 @@ in the create command. This is similar to the restriction that B<CDEF>s must
 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.
@@ -187,7 +188,7 @@ I<rows> defines how many generations of data values are kept in an B<RRA>.
 
 =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>
 
diff --git a/src/rrd_update.c b/src/rrd_update.c
index 35ac6a6..b6ac868 100644
--- a/src/rrd_update.c
+++ b/src/rrd_update.c
@@ -5,6 +5,12 @@
  *****************************************************************************
  * $Id$
  * $Log$
+ * Revision 1.5  2001/05/09 05:31:01  oetiker
+ * Bug fix: when update of multiple PDP/CDP RRAs coincided
+ * with interpolation of multiple PDPs an incorrect value was
+ * stored as the CDP. Especially evident for GAUGE data sources.
+ * Minor changes to rrdcreate.pod. -- Jake Brutlag <jakeb@corp.webtv.net>
+ *
  * Revision 1.4  2001/03/10 23:54:41  oetiker
  * Support for COMPUTE data sources (CDEF data sources). Removes the RPN
  * parser and calculator from rrd_graph and puts then in a new file,
@@ -426,7 +432,7 @@ rrd_update(int argc, char **argv)
 	       rrd.ds_def[i].par[DS_mrhb_cnt].u_cnt >= interval) {
 	       double rate = DNAN;
 	       /* the data source type defines how to process the data */
-		/* pdp_temp contains rate * time ... eg the bytes
+		/* pdp_new contains rate * time ... eg the bytes
 		 * transferred during the interval. Doing it this way saves
 		 * a lot of math operations */
 		
@@ -760,7 +766,7 @@ rrd_update(int argc, char **argv)
 						  cum_val = IFDNAN(rrd.cdp_prep[iii].scratch[CDP_val].u_val, 0.0);
 						  cur_val = IFDNAN(pdp_temp[ii],0.0);
                           rrd.cdp_prep[iii].scratch[CDP_primary_val].u_val =
-					       (cum_val + cur_val) /
+					       (cum_val + cur_val * start_pdp_offset) /
 				           (rrd.rra_def[i].pdp_cnt
 					       -rrd.cdp_prep[iii].scratch[CDP_unkn_pdp_cnt].u_cnt);
 						   /* initialize carry over value */
-- 
2.30.2