config-step/src/collectd.h:

  - Added define for COLLECTD_ROWS
  - Added define for COLLECTD_XFF
config-step/src/common.c:
  - Added `rra_get' which dynamically computes strings for RRAs.
    This function is called, but not yet actually used..

diff --git a/src/collectd.h b/src/collectd.h
index 5c21325..582d524 100644 (file)
--- a/src/collectd.h
+++ b/src/collectd.h
@@ -207,6 +207,14 @@
 #  define COLLECTD_HEARTBEAT "25"
 #endif
 
+#ifndef COLLECTD_ROWS
+#  define COLLECTD_ROWS "1200"
+#endif
+
+#ifndef COLLECTD_XFF
+#  define COLLECTD_XFF 0.1
+#endif
+
 extern time_t curtime;
 
 #ifdef HAVE_LIBRRD

diff --git a/src/common.c b/src/common.c
index 0a4cba3..3c416fc 100644 (file)
--- a/src/common.c
+++ b/src/common.c
@@ -25,6 +25,10 @@
 #include "common.h"
 #include "utils_debug.h"
 
+#ifdef HAVE_MATH_H
+#  include <math.h>
+#endif
+
 #ifdef HAVE_LIBKSTAT
 extern kstat_ctl_t *kc;
 #endif
@@ -47,6 +51,26 @@ static char *rra_def[] =
                NULL
 };
 static int rra_num = 12;
+
+static int rra_timespans[] =
+{
+       3600,
+       86400,
+       604800,
+       2678400,
+       31622400,
+       0
+};
+static int rra_timespans_num = 5;
+
+static char *rra_types[] =
+{
+       "AVERAGE",
+       "MIN",
+       "MAX",
+       NULL
+};
+static int rra_types_num = 3;
 #endif /* HAVE_LIBRRD */
 
 void sstrncpy (char *d, const char *s, int len)
@@ -289,6 +313,87 @@ int check_create_dir (const char *file_orig)
        return (0);
 }
 
+/* * * * *
+ * Magic *
+ * * * * */
+int rra_get (char ***ret)
+{
+       static char **rra_def = NULL;
+       static int rra_num = 0;
+
+       int rra_max = rra_timespans_num * rra_types_num;
+
+       int step;
+       int rows;
+       int span;
+
+       int cdp_num;
+       int cdp_len;
+       int i, j;
+
+       char buffer[64];
+
+       if ((rra_num != 0) && (rra_def != NULL))
+       {
+               *ret = rra_def;
+               return (rra_num);
+       }
+
+       if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
+               return (-1);
+       memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
+
+       step = atoi (COLLECTD_STEP);
+       rows = atoi (COLLECTD_ROWS);
+
+       if ((step <= 0) || (rows <= 0))
+       {
+               *ret = NULL;
+               return (-1);
+       }
+
+       cdp_len = 0;
+       for (i = 0; i < rra_timespans_num; i++)
+       {
+               span = rra_timespans[i];
+
+               if ((span / step) < rows)
+                       continue;
+
+               if (cdp_len == 0)
+                       cdp_len = 1;
+               else
+                       cdp_len = (int) floor (((double) span) / ((double) (rows * step)));
+
+               cdp_num = (int) ceil (((double) span) / ((double) (cdp_len * step)));
+
+               for (j = 0; j < rra_types_num; j++)
+               {
+                       if (rra_num >= rra_max)
+                               break;
+
+                       if (snprintf (buffer, sizeof(buffer), "RRA:%s:%3.1f:%u:%u",
+                                               rra_types[j], COLLECTD_XFF,
+                                               cdp_len, cdp_num) >= sizeof (buffer))
+                       {
+                               syslog (LOG_ERR, "rra_get: Buffer would have been truncated.");
+                               continue;
+                       }
+
+                       rra_def[rra_num++] = sstrdup (buffer);
+               }
+       }
+
+#if COLLECT_DEBUG
+       DBG ("rra_num = %i", rra_num);
+       for (i = 0; i < rra_num; i++)
+               DBG ("  %s", rra_def[i]);
+#endif
+
+       *ret = rra_def;
+       return (rra_num);
+}
+
 int rrd_create_file (char *filename, char **ds_def, int ds_num)
 {
        char **argv;
@@ -299,6 +404,8 @@ int rrd_create_file (char *filename, char **ds_def, int ds_num)
        if (check_create_dir (filename))
                return (-1);
 
+       rra_get (&argv); /* FIXME */
+
        argc = ds_num + rra_num + 4;
 
        if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)