2 * collectd - src/rrdtool.c
3 * Copyright (C) 2006,2007 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 #include "utils_avltree.h"
48 typedef struct rrd_cache_s rrd_cache_t;
53 struct rrd_queue_s *next;
55 typedef struct rrd_queue_s rrd_queue_t;
60 static int rra_timespans[] =
68 static int rra_timespans_num = STATIC_ARRAY_SIZE (rra_timespans);
70 static int *rra_timespans_custom = NULL;
71 static int rra_timespans_custom_num = 0;
73 static char *rra_types[] =
79 static int rra_types_num = STATIC_ARRAY_SIZE (rra_types);
81 static const char *config_keys[] =
92 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
94 /* If datadir is zero, the daemon's basedir is used. If stepsize or heartbeat
95 * is zero a default, depending on the `interval' member of the value list is
97 static char *datadir = NULL;
98 static int stepsize = 0;
99 static int heartbeat = 0;
100 static int rrarows = 1200;
101 static double xff = 0.1;
103 /* XXX: If you need to lock both, cache_lock and queue_lock, at the same time,
104 * ALWAYS lock `cache_lock' first! */
105 static int cache_timeout = 0;
106 static int cache_flush_timeout = 0;
107 static time_t cache_flush_last;
108 static c_avl_tree_t *cache = NULL;
109 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
111 static rrd_queue_t *queue_head = NULL;
112 static rrd_queue_t *queue_tail = NULL;
113 static pthread_t queue_thread = 0;
114 static pthread_mutex_t queue_lock = PTHREAD_MUTEX_INITIALIZER;
115 static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
117 #if !HAVE_THREADSAFE_LIBRRD
118 static pthread_mutex_t librrd_lock = PTHREAD_MUTEX_INITIALIZER;
121 static int do_shutdown = 0;
127 static void rra_free (int rra_num, char **rra_def)
131 for (i = 0; i < rra_num; i++)
136 } /* void rra_free */
138 static int rra_get (char ***ret, const value_list_t *vl)
156 /* The stepsize we use here: If it is user-set, use it. If not, use the
157 * interval of the value-list. */
166 ss = (stepsize > 0) ? stepsize : vl->interval;
173 /* Use the configured timespans or fall back to the built-in defaults */
174 if (rra_timespans_custom_num != 0)
176 rts = rra_timespans_custom;
177 rts_num = rra_timespans_custom_num;
182 rts_num = rra_timespans_num;
185 rra_max = rts_num * rra_types_num;
187 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
189 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
193 for (i = 0; i < rts_num; i++)
197 if ((span / ss) < rrarows)
203 cdp_len = (int) floor (((double) span)
204 / ((double) (rrarows * ss)));
206 cdp_num = (int) ceil (((double) span)
207 / ((double) (cdp_len * ss)));
209 for (j = 0; j < rra_types_num; j++)
211 if (rra_num >= rra_max)
214 if (ssnprintf (buffer, sizeof (buffer), "RRA:%s:%3.1f:%u:%u",
216 cdp_len, cdp_num) >= sizeof (buffer))
218 ERROR ("rra_get: Buffer would have been truncated.");
222 rra_def[rra_num++] = sstrdup (buffer);
227 DEBUG ("rra_num = %i", rra_num);
228 for (i = 0; i < rra_num; i++)
229 DEBUG (" %s", rra_def[i]);
236 static void ds_free (int ds_num, char **ds_def)
240 for (i = 0; i < ds_num; i++)
241 if (ds_def[i] != NULL)
246 static int ds_get (char ***ret, const data_set_t *ds, const value_list_t *vl)
255 DEBUG ("ds->ds_num = %i", ds->ds_num);
257 ds_def = (char **) malloc (ds->ds_num * sizeof (char *));
261 ERROR ("rrdtool plugin: malloc failed: %s",
262 sstrerror (errno, errbuf, sizeof (errbuf)));
265 memset (ds_def, '\0', ds->ds_num * sizeof (char *));
267 for (ds_num = 0; ds_num < ds->ds_num; ds_num++)
269 data_source_t *d = ds->ds + ds_num;
273 ds_def[ds_num] = NULL;
275 if (d->type == DS_TYPE_COUNTER)
277 else if (d->type == DS_TYPE_GAUGE)
281 ERROR ("rrdtool plugin: Unknown DS type: %i",
289 ssnprintf (min, sizeof (min), "%lf", d->min);
294 ssnprintf (max, sizeof (max), "%lf", d->max);
296 status = ssnprintf (buffer, sizeof (buffer),
299 (heartbeat > 0) ? heartbeat : (2 * vl->interval),
301 if ((status < 1) || (status >= sizeof (buffer)))
304 ds_def[ds_num] = sstrdup (buffer);
305 } /* for ds_num = 0 .. ds->ds_num */
310 DEBUG ("ds_num = %i", ds_num);
311 for (i = 0; i < ds_num; i++)
312 DEBUG (" %s", ds_def[i]);
316 if (ds_num != ds->ds_num)
318 ds_free (ds_num, ds_def);
326 #if HAVE_THREADSAFE_LIBRRD
327 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
328 int argc, char **argv)
332 optind = 0; /* bug in librrd? */
335 status = rrd_create_r (filename, pdp_step, last_up, argc, argv);
339 WARNING ("rrdtool plugin: rrd_create_r (%s) failed: %s",
340 filename, rrd_get_error ());
344 } /* int srrd_create */
346 static int srrd_update (char *filename, char *template, int argc, char **argv)
350 optind = 0; /* bug in librrd? */
353 status = rrd_update_r (filename, template, argc, argv);
357 WARNING ("rrdtool plugin: rrd_update_r (%s) failed: %s",
358 filename, rrd_get_error ());
362 } /* int srrd_update */
363 /* #endif HAVE_THREADSAFE_LIBRRD */
365 #else /* !HAVE_THREADSAFE_LIBRRD */
366 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
367 int argc, char **argv)
374 char pdp_step_str[16];
375 char last_up_str[16];
378 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
379 if (new_argv == NULL)
381 ERROR ("rrdtool plugin: malloc failed.");
386 last_up = time (NULL) - 10;
388 ssnprintf (pdp_step_str, sizeof (pdp_step_str), "%lu", pdp_step);
389 ssnprintf (last_up_str, sizeof (last_up_str), "%u", (unsigned int) last_up);
391 new_argv[0] = "create";
392 new_argv[1] = filename;
394 new_argv[3] = pdp_step_str;
396 new_argv[5] = last_up_str;
398 memcpy (new_argv + 6, argv, argc * sizeof (char *));
399 new_argv[new_argc] = NULL;
401 pthread_mutex_lock (&librrd_lock);
402 optind = 0; /* bug in librrd? */
405 status = rrd_create (new_argc, new_argv);
406 pthread_mutex_unlock (&librrd_lock);
410 WARNING ("rrdtool plugin: rrd_create (%s) failed: %s",
411 filename, rrd_get_error ());
417 } /* int srrd_create */
419 static int srrd_update (char *filename, char *template, int argc, char **argv)
426 assert (template == NULL);
429 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
430 if (new_argv == NULL)
432 ERROR ("rrdtool plugin: malloc failed.");
436 new_argv[0] = "update";
437 new_argv[1] = filename;
439 memcpy (new_argv + 2, argv, argc * sizeof (char *));
440 new_argv[new_argc] = NULL;
442 pthread_mutex_lock (&librrd_lock);
443 optind = 0; /* bug in librrd? */
446 status = rrd_update (new_argc, new_argv);
447 pthread_mutex_unlock (&librrd_lock);
451 WARNING ("rrdtool plugin: rrd_update_r failed: %s: %s",
452 argv[1], rrd_get_error ());
458 } /* int srrd_update */
459 #endif /* !HAVE_THREADSAFE_LIBRRD */
461 static int rrd_create_file (char *filename, const data_set_t *ds, const value_list_t *vl)
471 if (check_create_dir (filename))
474 if ((rra_num = rra_get (&rra_def, vl)) < 1)
476 ERROR ("rrd_create_file failed: Could not calculate RRAs");
480 if ((ds_num = ds_get (&ds_def, ds, vl)) < 1)
482 ERROR ("rrd_create_file failed: Could not calculate DSes");
486 argc = ds_num + rra_num;
488 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
491 ERROR ("rrd_create failed: %s",
492 sstrerror (errno, errbuf, sizeof (errbuf)));
496 memcpy (argv, ds_def, ds_num * sizeof (char *));
497 memcpy (argv + ds_num, rra_def, rra_num * sizeof (char *));
498 argv[ds_num + rra_num] = NULL;
500 assert (vl->time > 10);
501 status = srrd_create (filename,
502 (stepsize > 0) ? stepsize : vl->interval,
507 ds_free (ds_num, ds_def);
508 rra_free (rra_num, rra_def);
513 static int value_list_to_string (char *buffer, int buffer_len,
514 const data_set_t *ds, const value_list_t *vl)
520 memset (buffer, '\0', buffer_len);
522 status = ssnprintf (buffer, buffer_len, "%u", (unsigned int) vl->time);
523 if ((status < 1) || (status >= buffer_len))
527 for (i = 0; i < ds->ds_num; i++)
529 if ((ds->ds[i].type != DS_TYPE_COUNTER)
530 && (ds->ds[i].type != DS_TYPE_GAUGE))
533 if (ds->ds[i].type == DS_TYPE_COUNTER)
534 status = ssnprintf (buffer + offset, buffer_len - offset,
535 ":%llu", vl->values[i].counter);
537 status = ssnprintf (buffer + offset, buffer_len - offset,
538 ":%lf", vl->values[i].gauge);
540 if ((status < 1) || (status >= (buffer_len - offset)))
544 } /* for ds->ds_num */
547 } /* int value_list_to_string */
549 static int value_list_to_filename (char *buffer, int buffer_len,
550 const data_set_t *ds, const value_list_t *vl)
557 status = ssnprintf (buffer + offset, buffer_len - offset,
559 if ((status < 1) || (status >= buffer_len - offset))
564 status = ssnprintf (buffer + offset, buffer_len - offset,
566 if ((status < 1) || (status >= buffer_len - offset))
570 if (strlen (vl->plugin_instance) > 0)
571 status = ssnprintf (buffer + offset, buffer_len - offset,
572 "%s-%s/", vl->plugin, vl->plugin_instance);
574 status = ssnprintf (buffer + offset, buffer_len - offset,
576 if ((status < 1) || (status >= buffer_len - offset))
580 if (strlen (vl->type_instance) > 0)
581 status = ssnprintf (buffer + offset, buffer_len - offset,
582 "%s-%s.rrd", vl->type, vl->type_instance);
584 status = ssnprintf (buffer + offset, buffer_len - offset,
586 if ((status < 1) || (status >= buffer_len - offset))
591 } /* int value_list_to_filename */
593 static void *rrd_queue_thread (void *data)
597 rrd_queue_t *queue_entry;
598 rrd_cache_t *cache_entry;
603 /* XXX: If you need to lock both, cache_lock and queue_lock, at
604 * the same time, ALWAYS lock `cache_lock' first! */
606 /* wait until an entry is available */
607 pthread_mutex_lock (&queue_lock);
608 while ((queue_head == NULL) && (do_shutdown == 0))
609 pthread_cond_wait (&queue_cond, &queue_lock);
611 /* We're in the shutdown phase */
612 if (queue_head == NULL)
614 pthread_mutex_unlock (&queue_lock);
618 /* Dequeue the first entry */
619 queue_entry = queue_head;
620 if (queue_head == queue_tail)
621 queue_head = queue_tail = NULL;
623 queue_head = queue_head->next;
625 /* Unlock the queue again */
626 pthread_mutex_unlock (&queue_lock);
628 /* We now need the cache lock so the entry isn't updated while
629 * we make a copy of it's values */
630 pthread_mutex_lock (&cache_lock);
632 c_avl_get (cache, queue_entry->filename, (void *) &cache_entry);
634 values = cache_entry->values;
635 values_num = cache_entry->values_num;
637 cache_entry->values = NULL;
638 cache_entry->values_num = 0;
639 cache_entry->flags = FLAG_NONE;
641 pthread_mutex_unlock (&cache_lock);
643 /* Write the values to the RRD-file */
644 srrd_update (queue_entry->filename, NULL, values_num, values);
645 DEBUG ("rrdtool plugin: queue thread: Wrote %i values to %s",
646 values_num, queue_entry->filename);
648 for (i = 0; i < values_num; i++)
653 sfree (queue_entry->filename);
657 pthread_mutex_lock (&cache_lock);
658 c_avl_destroy (cache);
660 pthread_mutex_unlock (&cache_lock);
662 pthread_exit ((void *) 0);
664 } /* void *rrd_queue_thread */
666 static int rrd_queue_cache_entry (const char *filename)
668 rrd_queue_t *queue_entry;
670 queue_entry = (rrd_queue_t *) malloc (sizeof (rrd_queue_t));
671 if (queue_entry == NULL)
674 queue_entry->filename = strdup (filename);
675 if (queue_entry->filename == NULL)
681 queue_entry->next = NULL;
683 pthread_mutex_lock (&queue_lock);
684 if (queue_tail == NULL)
685 queue_head = queue_entry;
687 queue_tail->next = queue_entry;
688 queue_tail = queue_entry;
689 pthread_cond_signal (&queue_cond);
690 pthread_mutex_unlock (&queue_lock);
692 DEBUG ("rrdtool plugin: Put `%s' into the update queue", filename);
695 } /* int rrd_queue_cache_entry */
697 static void rrd_cache_flush (int timeout)
706 c_avl_iterator_t *iter;
709 DEBUG ("rrdtool plugin: Flushing cache, timeout = %i", timeout);
713 /* Build a list of entries to be flushed */
714 iter = c_avl_get_iterator (cache);
715 while (c_avl_iterator_next (iter, (void *) &key, (void *) &rc) == 0)
717 if (rc->flags == FLAG_QUEUED)
719 else if ((now - rc->first_value) < timeout)
721 else if (rc->values_num > 0)
723 if (rrd_queue_cache_entry (key) == 0)
724 rc->flags = FLAG_QUEUED;
726 else /* ancient and no values -> waste of memory */
728 char **tmp = (char **) realloc ((void *) keys,
729 (keys_num + 1) * sizeof (char *));
733 ERROR ("rrdtool plugin: "
734 "realloc failed: %s",
735 sstrerror (errno, errbuf,
737 c_avl_iterator_destroy (iter);
742 keys[keys_num] = key;
745 } /* while (c_avl_iterator_next) */
746 c_avl_iterator_destroy (iter);
748 for (i = 0; i < keys_num; i++)
750 if (c_avl_remove (cache, keys[i], (void *) &key, (void *) &rc) != 0)
752 DEBUG ("rrdtool plugin: c_avl_remove (%s) failed.", keys[i]);
756 assert (rc->values == NULL);
757 assert (rc->values_num == 0);
762 } /* for (i = 0..keys_num) */
766 cache_flush_last = now;
767 } /* void rrd_cache_flush */
769 static int rrd_cache_flush_identifier (int timeout, const char *identifier)
776 if (identifier == NULL)
778 rrd_cache_flush (timeout);
785 snprintf (key, sizeof (key), "%s.rrd",
788 snprintf (key, sizeof (key), "%s/%s.rrd",
789 datadir, identifier);
790 key[sizeof (key) - 1] = 0;
792 status = c_avl_get (cache, key, (void *) &rc);
795 WARNING ("rrdtool plugin: rrd_cache_flush_identifier: "
796 "c_avl_get (%s) failed. Does that file really exist?",
801 if (rc->flags == FLAG_QUEUED)
803 else if ((now - rc->first_value) < timeout)
805 else if (rc->values_num > 0)
807 status = rrd_queue_cache_entry (key);
809 rc->flags = FLAG_QUEUED;
813 } /* int rrd_cache_flush_identifier */
815 static int rrd_cache_insert (const char *filename,
816 const char *value, time_t value_time)
818 rrd_cache_t *rc = NULL;
822 pthread_mutex_lock (&cache_lock);
824 c_avl_get (cache, filename, (void *) &rc);
828 rc = (rrd_cache_t *) malloc (sizeof (rrd_cache_t));
835 rc->flags = FLAG_NONE;
839 if (rc->last_value >= value_time)
841 pthread_mutex_unlock (&cache_lock);
842 WARNING ("rrdtool plugin: (rc->last_value = %u) >= (value_time = %u)",
843 (unsigned int) rc->last_value,
844 (unsigned int) value_time);
848 values_new = (char **) realloc ((void *) rc->values,
849 (rc->values_num + 1) * sizeof (char *));
850 if (values_new == NULL)
853 void *cache_key = NULL;
855 sstrerror (errno, errbuf, sizeof (errbuf));
857 c_avl_remove (cache, filename, &cache_key, NULL);
858 pthread_mutex_unlock (&cache_lock);
860 ERROR ("rrdtool plugin: realloc failed: %s", errbuf);
867 rc->values = values_new;
869 rc->values[rc->values_num] = strdup (value);
870 if (rc->values[rc->values_num] != NULL)
873 if (rc->values_num == 1)
874 rc->first_value = value_time;
875 rc->last_value = value_time;
877 /* Insert if this is the first value */
880 void *cache_key = strdup (filename);
882 if (cache_key == NULL)
885 sstrerror (errno, errbuf, sizeof (errbuf));
887 pthread_mutex_unlock (&cache_lock);
889 ERROR ("rrdtool plugin: strdup failed: %s", errbuf);
891 sfree (rc->values[0]);
897 c_avl_insert (cache, cache_key, rc);
900 DEBUG ("rrdtool plugin: rrd_cache_insert: file = %s; "
901 "values_num = %i; age = %u;",
902 filename, rc->values_num,
903 rc->last_value - rc->first_value);
905 if ((rc->last_value - rc->first_value) >= cache_timeout)
907 /* XXX: If you need to lock both, cache_lock and queue_lock, at
908 * the same time, ALWAYS lock `cache_lock' first! */
909 if (rc->flags != FLAG_QUEUED)
911 if (rrd_queue_cache_entry (filename) == 0)
912 rc->flags = FLAG_QUEUED;
916 DEBUG ("rrdtool plugin: `%s' is already queued.", filename);
920 if ((cache_timeout > 0) &&
921 ((time (NULL) - cache_flush_last) > cache_flush_timeout))
922 rrd_cache_flush (cache_flush_timeout);
925 pthread_mutex_unlock (&cache_lock);
928 } /* int rrd_cache_insert */
930 static int rrd_compare_numeric (const void *a_ptr, const void *b_ptr)
932 int a = *((int *) a_ptr);
933 int b = *((int *) b_ptr);
941 } /* int rrd_compare_numeric */
943 static int rrd_write (const data_set_t *ds, const value_list_t *vl)
950 if (0 != strcmp (ds->type, vl->type)) {
951 ERROR ("rrdtool plugin: DS type does not match value list type");
955 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
958 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
961 if (stat (filename, &statbuf) == -1)
965 if (rrd_create_file (filename, ds, vl))
971 ERROR ("stat(%s) failed: %s", filename,
972 sstrerror (errno, errbuf,
977 else if (!S_ISREG (statbuf.st_mode))
979 ERROR ("stat(%s): Not a regular file!",
984 status = rrd_cache_insert (filename, values, vl->time);
987 } /* int rrd_write */
989 static int rrd_flush (int timeout, const char *identifier)
991 pthread_mutex_lock (&cache_lock);
994 pthread_mutex_unlock (&cache_lock);
998 rrd_cache_flush_identifier (timeout, identifier);
1000 pthread_mutex_unlock (&cache_lock);
1002 } /* int rrd_flush */
1004 static int rrd_config (const char *key, const char *value)
1006 if (strcasecmp ("CacheTimeout", key) == 0)
1008 int tmp = atoi (value);
1011 fprintf (stderr, "rrdtool: `CacheTimeout' must "
1012 "be greater than 0.\n");
1015 cache_timeout = tmp;
1017 else if (strcasecmp ("CacheFlush", key) == 0)
1019 int tmp = atoi (value);
1022 fprintf (stderr, "rrdtool: `CacheFlush' must "
1023 "be greater than 0.\n");
1026 cache_flush_timeout = tmp;
1028 else if (strcasecmp ("DataDir", key) == 0)
1030 if (datadir != NULL)
1032 datadir = strdup (value);
1033 if (datadir != NULL)
1035 int len = strlen (datadir);
1036 while ((len > 0) && (datadir[len - 1] == '/'))
1039 datadir[len] = '\0';
1048 else if (strcasecmp ("StepSize", key) == 0)
1050 stepsize = atoi (value);
1054 else if (strcasecmp ("HeartBeat", key) == 0)
1056 heartbeat = atoi (value);
1060 else if (strcasecmp ("RRARows", key) == 0)
1062 int tmp = atoi (value);
1065 fprintf (stderr, "rrdtool: `RRARows' must "
1066 "be greater than 0.\n");
1071 else if (strcasecmp ("RRATimespan", key) == 0)
1073 char *saveptr = NULL;
1079 value_copy = strdup (value);
1080 if (value_copy == NULL)
1084 while ((ptr = strtok_r (dummy, ", \t", &saveptr)) != NULL)
1088 tmp_alloc = realloc (rra_timespans_custom,
1089 sizeof (int) * (rra_timespans_custom_num + 1));
1090 if (tmp_alloc == NULL)
1092 fprintf (stderr, "rrdtool: realloc failed.\n");
1096 rra_timespans_custom = tmp_alloc;
1097 rra_timespans_custom[rra_timespans_custom_num] = atoi (ptr);
1098 if (rra_timespans_custom[rra_timespans_custom_num] != 0)
1099 rra_timespans_custom_num++;
1100 } /* while (strtok_r) */
1102 qsort (/* base = */ rra_timespans_custom,
1103 /* nmemb = */ rra_timespans_custom_num,
1104 /* size = */ sizeof (rra_timespans_custom[0]),
1105 /* compar = */ rrd_compare_numeric);
1109 else if (strcasecmp ("XFF", key) == 0)
1111 double tmp = atof (value);
1112 if ((tmp < 0.0) || (tmp >= 1.0))
1114 fprintf (stderr, "rrdtool: `XFF' must "
1115 "be in the range 0 to 1 (exclusive).");
1125 } /* int rrd_config */
1127 static int rrd_shutdown (void)
1129 pthread_mutex_lock (&cache_lock);
1130 rrd_cache_flush (-1);
1131 pthread_mutex_unlock (&cache_lock);
1133 pthread_mutex_lock (&queue_lock);
1135 pthread_cond_signal (&queue_cond);
1136 pthread_mutex_unlock (&queue_lock);
1138 /* Wait for all the values to be written to disk before returning. */
1139 if (queue_thread != 0)
1141 pthread_join (queue_thread, NULL);
1143 DEBUG ("rrdtool plugin: queue_thread exited.");
1147 } /* int rrd_shutdown */
1149 static int rrd_init (void)
1156 heartbeat = 2 * stepsize;
1158 if ((heartbeat > 0) && (heartbeat < interval_g))
1159 WARNING ("rrdtool plugin: Your `heartbeat' is "
1160 "smaller than your `interval'. This will "
1161 "likely cause problems.");
1162 else if ((stepsize > 0) && (stepsize < interval_g))
1163 WARNING ("rrdtool plugin: Your `stepsize' is "
1164 "smaller than your `interval'. This will "
1165 "create needlessly big RRD-files.");
1167 /* Set the cache up */
1168 pthread_mutex_lock (&cache_lock);
1170 cache = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1173 ERROR ("rrdtool plugin: c_avl_create failed.");
1177 cache_flush_last = time (NULL);
1178 if (cache_timeout < 2)
1181 cache_flush_timeout = 0;
1183 else if (cache_flush_timeout < cache_timeout)
1184 cache_flush_timeout = 10 * cache_timeout;
1186 pthread_mutex_unlock (&cache_lock);
1188 status = pthread_create (&queue_thread, NULL, rrd_queue_thread, NULL);
1191 ERROR ("rrdtool plugin: Cannot create queue-thread.");
1195 DEBUG ("rrdtool plugin: rrd_init: datadir = %s; stepsize = %i;"
1196 " heartbeat = %i; rrarows = %i; xff = %lf;",
1197 (datadir == NULL) ? "(null)" : datadir,
1198 stepsize, heartbeat, rrarows, xff);
1201 } /* int rrd_init */
1203 void module_register (void)
1205 plugin_register_config ("rrdtool", rrd_config,
1206 config_keys, config_keys_num);
1207 plugin_register_init ("rrdtool", rrd_init);
1208 plugin_register_write ("rrdtool", rrd_write);
1209 plugin_register_flush ("rrdtool", rrd_flush);
1210 plugin_register_shutdown ("rrdtool", rrd_shutdown);