From ee74dd28301740b9b6f816bff3a2dbaa601953c4 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@collectd.org>
Date: Sat, 10 Nov 2012 09:51:24 +0100
Subject: [PATCH] rrdcached plugin: Implement the "RRATimespan" option.

---
 src/collectd.conf.pod |  8 ++++++++
 src/rrdcached.c       | 27 +++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index 25a6c06e..9a670681 100644
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -4225,6 +4225,14 @@ one CDP by calculating:
 Bottom line is, set this no smaller than the width of you graphs in pixels. The
 default is 1200.
 
+=item B<RRATimespan> I<Seconds>
+
+Adds an RRA-timespan, given in seconds. Use this option multiple times to have
+more then one RRA. If this option is never used, the built-in default of (3600,
+86400, 604800, 2678400, 31622400) is used.
+
+For more information on how RRA-sizes are calculated see B<RRARows> above.
+
 =back
 
 =head2 Plugin C<rrdtool>
diff --git a/src/rrdcached.c b/src/rrdcached.c
index a3dff3e9..3731d010 100644
--- a/src/rrdcached.c
+++ b/src/rrdcached.c
@@ -176,6 +176,26 @@ static int rc_config_get_int_positive (oconfig_item_t const *ci, int *ret)
   return (0);
 } /* int rc_config_get_int_positive */
 
+static int rc_config_add_timespan (int timespan)
+{
+  int *tmp;
+
+  if (timespan <= 0)
+    return (EINVAL);
+
+  tmp = realloc (rrdcreate_config.timespans,
+      sizeof (*rrdcreate_config.timespans)
+      * (rrdcreate_config.timespans_num + 1));
+  if (tmp == NULL)
+    return (ENOMEM);
+  rrdcreate_config.timespans = tmp;
+
+  rrdcreate_config.timespans[rrdcreate_config.timespans_num] = timespan;
+  rrdcreate_config.timespans_num++;
+
+  return (0);
+} /* int rc_config_add_timespan */
+
 static int rc_config (oconfig_item_t *ci)
 {
   int i;
@@ -215,6 +235,13 @@ static int rc_config (oconfig_item_t *ci)
       status = rc_config_get_int_positive (child, &rrdcreate_config.heartbeat);
     else if (strcasecmp ("RRARows", key) == 0)
       status = rc_config_get_int_positive (child, &rrdcreate_config.rrarows);
+    else if (strcasecmp ("RRATimespan", key) == 0)
+    {
+      int tmp = -1;
+      status = rc_config_get_int_positive (child, &tmp);
+      if (status == 0)
+        status = rc_config_add_timespan (tmp);
+    }
     else
     {
       WARNING ("rrdcached plugin: Ignoring invalid option %s.", key);
-- 
2.30.2