1 /*****************************************************************************
2 * RRDtool 1.3.2 Copyright by Tobi Oetiker, 1997-2008
3 * Copyright by Florian Forster, 2008
4 *****************************************************************************
5 * rrd_update.c RRD Update Function
6 *****************************************************************************
8 *****************************************************************************/
12 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
13 #include <sys/locking.h>
21 #include "rrd_rpncalc.h"
23 #include "rrd_is_thread_safe.h"
26 #include "rrd_client.h"
28 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
30 * WIN32 does not have gettimeofday and struct timeval. This is a quick and dirty
33 #include <sys/timeb.h>
37 time_t tv_sec; /* seconds */
38 long tv_usec; /* microseconds */
43 int tz_minuteswest; /* minutes W of Greenwich */
44 int tz_dsttime; /* type of dst correction */
47 static int gettimeofday(
49 struct __timezone *tz)
52 struct _timeb current_time;
54 _ftime(¤t_time);
56 t->tv_sec = current_time.time;
57 t->tv_usec = current_time.millitm * 1000;
64 /* FUNCTION PROTOTYPES */
78 static int allocate_data_structures(
81 rrd_value_t **pdp_temp,
84 unsigned long *tmpl_cnt,
85 unsigned long **rra_step_cnt,
86 unsigned long **skip_update,
87 rrd_value_t **pdp_new);
89 static int parse_template(
92 unsigned long *tmpl_cnt,
95 static int process_arg(
99 unsigned long rra_begin,
100 time_t *current_time,
101 unsigned long *current_time_usec,
102 rrd_value_t *pdp_temp,
103 rrd_value_t *pdp_new,
104 unsigned long *rra_step_cnt,
107 unsigned long tmpl_cnt,
108 rrd_info_t ** pcdp_summary,
110 unsigned long *skip_update,
111 int *schedule_smooth);
118 unsigned long tmpl_cnt,
119 time_t *current_time,
120 unsigned long *current_time_usec,
123 static int get_time_from_reading(
127 time_t *current_time,
128 unsigned long *current_time_usec,
131 static int update_pdp_prep(
134 rrd_value_t *pdp_new,
137 static int calculate_elapsed_steps(
139 unsigned long current_time,
140 unsigned long current_time_usec,
144 unsigned long *proc_pdp_cnt);
146 static void simple_update(
149 rrd_value_t *pdp_new);
151 static int process_all_pdp_st(
156 unsigned long elapsed_pdp_st,
157 rrd_value_t *pdp_new,
158 rrd_value_t *pdp_temp);
160 static int process_pdp_st(
162 unsigned long ds_idx,
167 rrd_value_t *pdp_new,
168 rrd_value_t *pdp_temp);
170 static int update_all_cdp_prep(
172 unsigned long *rra_step_cnt,
173 unsigned long rra_begin,
174 rrd_file_t *rrd_file,
175 unsigned long elapsed_pdp_st,
176 unsigned long proc_pdp_cnt,
177 rrd_value_t **last_seasonal_coef,
178 rrd_value_t **seasonal_coef,
179 rrd_value_t *pdp_temp,
180 unsigned long *skip_update,
181 int *schedule_smooth);
183 static int do_schedule_smooth(
185 unsigned long rra_idx,
186 unsigned long elapsed_pdp_st);
188 static int update_cdp_prep(
190 unsigned long elapsed_pdp_st,
191 unsigned long start_pdp_offset,
192 unsigned long *rra_step_cnt,
194 rrd_value_t *pdp_temp,
195 rrd_value_t *last_seasonal_coef,
196 rrd_value_t *seasonal_coef,
199 static void update_cdp(
202 rrd_value_t pdp_temp_val,
203 unsigned long rra_step_cnt,
204 unsigned long elapsed_pdp_st,
205 unsigned long start_pdp_offset,
206 unsigned long pdp_cnt,
211 static void initialize_cdp_val(
214 rrd_value_t pdp_temp_val,
215 unsigned long elapsed_pdp_st,
216 unsigned long start_pdp_offset,
217 unsigned long pdp_cnt);
219 static void reset_cdp(
221 unsigned long elapsed_pdp_st,
222 rrd_value_t *pdp_temp,
223 rrd_value_t *last_seasonal_coef,
224 rrd_value_t *seasonal_coef,
228 enum cf_en current_cf);
230 static rrd_value_t initialize_average_carry_over(
231 rrd_value_t pdp_temp_val,
232 unsigned long elapsed_pdp_st,
233 unsigned long start_pdp_offset,
234 unsigned long pdp_cnt);
236 static rrd_value_t calculate_cdp_val(
238 rrd_value_t pdp_temp_val,
239 unsigned long elapsed_pdp_st,
244 static int update_aberrant_cdps(
246 rrd_file_t *rrd_file,
247 unsigned long rra_begin,
248 unsigned long elapsed_pdp_st,
249 rrd_value_t *pdp_temp,
250 rrd_value_t **seasonal_coef);
252 static int write_to_rras(
254 rrd_file_t *rrd_file,
255 unsigned long *rra_step_cnt,
256 unsigned long rra_begin,
258 unsigned long *skip_update,
259 rrd_info_t ** pcdp_summary);
261 static int write_RRA_row(
262 rrd_file_t *rrd_file,
264 unsigned long rra_idx,
265 unsigned short CDP_scratch_idx,
266 rrd_info_t ** pcdp_summary,
269 static int smooth_all_rras(
271 rrd_file_t *rrd_file,
272 unsigned long rra_begin);
275 static int write_changes_to_disk(
277 rrd_file_t *rrd_file,
282 * normalize time as returned by gettimeofday. usec part must
285 static void normalize_time(
288 if (t->tv_usec < 0) {
295 * Sets current_time and current_time_usec based on the current time.
296 * current_time_usec is set to 0 if the version number is 1 or 2.
298 static void initialize_time(
299 time_t *current_time,
300 unsigned long *current_time_usec,
303 struct timeval tmp_time; /* used for time conversion */
305 gettimeofday(&tmp_time, 0);
306 normalize_time(&tmp_time);
307 *current_time = tmp_time.tv_sec;
309 *current_time_usec = tmp_time.tv_usec;
311 *current_time_usec = 0;
315 #define IFDNAN(X,Y) (isnan(X) ? (Y) : (X));
317 rrd_info_t *rrd_update_v(
322 rrd_info_t *result = NULL;
324 char *opt_daemon = NULL;
325 struct option long_options[] = {
326 {"template", required_argument, 0, 't'},
332 opterr = 0; /* initialize getopt */
335 int option_index = 0;
338 opt = getopt_long(argc, argv, "t:", long_options, &option_index);
349 rrd_set_error("unknown option '%s'", argv[optind - 1]);
354 opt_daemon = getenv (ENV_RRDCACHED_ADDRESS);
355 if (opt_daemon != NULL) {
356 rrd_set_error ("The \"%s\" environment variable is defined, "
357 "but \"%s\" cannot work with rrdcached. Either unset "
358 "the environment variable or use \"update\" instead.",
359 ENV_RRDCACHED_ADDRESS, argv[0]);
363 /* need at least 2 arguments: filename, data. */
364 if (argc - optind < 2) {
365 rrd_set_error("Not enough arguments");
369 result = rrd_info_push(NULL, sprintf_alloc("return_value"), RD_I_INT, rc);
370 rc.u_int = _rrd_update(argv[optind], tmplt,
372 (const char **) (argv + optind + 1), result);
373 result->value.u_int = rc.u_int;
382 struct option long_options[] = {
383 {"template", required_argument, 0, 't'},
384 {"daemon", required_argument, 0, 'd'},
387 int option_index = 0;
391 char *opt_daemon = NULL;
394 opterr = 0; /* initialize getopt */
397 opt = getopt_long(argc, argv, "t:d:", long_options, &option_index);
404 tmplt = strdup(optarg);
408 if (opt_daemon != NULL)
410 opt_daemon = strdup (optarg);
411 if (opt_daemon == NULL)
413 rrd_set_error("strdup failed.");
419 rrd_set_error("unknown option '%s'", argv[optind - 1]);
424 /* need at least 2 arguments: filename, data. */
425 if (argc - optind < 2) {
426 rrd_set_error("Not enough arguments");
430 { /* try to connect to rrdcached */
431 int status = rrdc_connect(opt_daemon);
432 if (status != 0) return status;
435 if ((tmplt != NULL) && rrdc_is_connected(opt_daemon))
437 rrd_set_error("The caching daemon cannot be used together with "
442 if (! rrdc_is_connected(opt_daemon))
444 rc = rrd_update_r(argv[optind], tmplt,
445 argc - optind - 1, (const char **) (argv + optind + 1));
447 else /* we are connected */
449 rc = rrdc_update (argv[optind], /* file */
450 argc - optind - 1, /* values_num */
451 (const char *const *) (argv + optind + 1)); /* values */
453 rrd_set_error("Failed sending the values to rrdcached: %s",
463 if (opt_daemon != NULL)
472 const char *filename,
477 return _rrd_update(filename, tmplt, argc, argv, NULL);
481 const char *filename,
485 rrd_info_t * pcdp_summary)
490 unsigned long rra_begin; /* byte pointer to the rra
491 * area in the rrd file. this
492 * pointer never changes value */
493 rrd_value_t *pdp_new; /* prepare the incoming data to be added
494 * to the existing entry */
495 rrd_value_t *pdp_temp; /* prepare the pdp values to be added
496 * to the cdp values */
498 long *tmpl_idx; /* index representing the settings
499 * transported by the tmplt index */
500 unsigned long tmpl_cnt = 2; /* time and data */
502 time_t current_time = 0;
503 unsigned long current_time_usec = 0; /* microseconds part of current time */
505 int schedule_smooth = 0;
507 /* number of elapsed PDP steps since last update */
508 unsigned long *rra_step_cnt = NULL;
510 int version; /* rrd version */
511 rrd_file_t *rrd_file;
512 char *arg_copy; /* for processing the argv */
513 unsigned long *skip_update; /* RRAs to advance but not write */
515 /* need at least 1 arguments: data. */
517 rrd_set_error("Not enough arguments");
522 if ((rrd_file = rrd_open(filename, &rrd, RRD_READWRITE)) == NULL) {
525 /* We are now at the beginning of the rra's */
526 rra_begin = rrd_file->header_len;
528 version = atoi(rrd.stat_head->version);
530 initialize_time(¤t_time, ¤t_time_usec, version);
532 /* get exclusive lock to whole file.
533 * lock gets removed when we close the file.
535 if (rrd_lock(rrd_file) != 0) {
536 rrd_set_error("could not lock RRD");
540 if (allocate_data_structures(&rrd, &updvals,
541 &pdp_temp, tmplt, &tmpl_idx, &tmpl_cnt,
542 &rra_step_cnt, &skip_update,
547 /* loop through the arguments. */
548 for (arg_i = 0; arg_i < argc; arg_i++) {
549 if ((arg_copy = strdup(argv[arg_i])) == NULL) {
550 rrd_set_error("failed duplication argv entry");
553 if (process_arg(arg_copy, &rrd, rrd_file, rra_begin,
554 ¤t_time, ¤t_time_usec, pdp_temp, pdp_new,
555 rra_step_cnt, updvals, tmpl_idx, tmpl_cnt,
556 &pcdp_summary, version, skip_update,
557 &schedule_smooth) == -1) {
558 if (rrd_test_error()) { /* Should have error string always here */
561 /* Prepend file name to error message */
562 if ((save_error = strdup(rrd_get_error())) != NULL) {
563 rrd_set_error("%s: %s", filename, save_error);
575 /* if we got here and if there is an error and if the file has not been
576 * written to, then close things up and return. */
577 if (rrd_test_error()) {
578 goto err_free_structures;
581 if (write_changes_to_disk(&rrd, rrd_file, version) == -1) {
582 goto err_free_structures;
586 /* calling the smoothing code here guarantees at most one smoothing
587 * operation per rrd_update call. Unfortunately, it is possible with bulk
588 * updates, or a long-delayed update for smoothing to occur off-schedule.
589 * This really isn't critical except during the burn-in cycles. */
590 if (schedule_smooth) {
591 smooth_all_rras(&rrd, rrd_file, rra_begin);
594 /* rrd_dontneed(rrd_file,&rrd); */
620 * Allocate some important arrays used, and initialize the template.
622 * When it returns, either all of the structures are allocated
623 * or none of them are.
625 * Returns 0 on success, -1 on error.
627 static int allocate_data_structures(
630 rrd_value_t **pdp_temp,
633 unsigned long *tmpl_cnt,
634 unsigned long **rra_step_cnt,
635 unsigned long **skip_update,
636 rrd_value_t **pdp_new)
639 if ((*updvals = (char **) malloc(sizeof(char *)
640 * (rrd->stat_head->ds_cnt + 1))) == NULL) {
641 rrd_set_error("allocating updvals pointer array.");
644 if ((*pdp_temp = (rrd_value_t *) malloc(sizeof(rrd_value_t)
645 * rrd->stat_head->ds_cnt)) ==
647 rrd_set_error("allocating pdp_temp.");
648 goto err_free_updvals;
650 if ((*skip_update = (unsigned long *) malloc(sizeof(unsigned long)
652 rrd->stat_head->rra_cnt)) ==
654 rrd_set_error("allocating skip_update.");
655 goto err_free_pdp_temp;
657 if ((*tmpl_idx = (long *) malloc(sizeof(unsigned long)
658 * (rrd->stat_head->ds_cnt + 1))) == NULL) {
659 rrd_set_error("allocating tmpl_idx.");
660 goto err_free_skip_update;
662 if ((*rra_step_cnt = (unsigned long *) malloc(sizeof(unsigned long)
665 rra_cnt))) == NULL) {
666 rrd_set_error("allocating rra_step_cnt.");
667 goto err_free_tmpl_idx;
670 /* initialize tmplt redirector */
671 /* default config example (assume DS 1 is a CDEF DS)
672 tmpl_idx[0] -> 0; (time)
673 tmpl_idx[1] -> 1; (DS 0)
674 tmpl_idx[2] -> 3; (DS 2)
675 tmpl_idx[3] -> 4; (DS 3) */
676 (*tmpl_idx)[0] = 0; /* time */
677 for (i = 1, ii = 1; i <= rrd->stat_head->ds_cnt; i++) {
678 if (dst_conv(rrd->ds_def[i - 1].dst) != DST_CDEF)
679 (*tmpl_idx)[ii++] = i;
684 if (parse_template(rrd, tmplt, tmpl_cnt, *tmpl_idx) == -1) {
685 goto err_free_rra_step_cnt;
689 if ((*pdp_new = (rrd_value_t *) malloc(sizeof(rrd_value_t)
690 * rrd->stat_head->ds_cnt)) == NULL) {
691 rrd_set_error("allocating pdp_new.");
692 goto err_free_rra_step_cnt;
697 err_free_rra_step_cnt:
701 err_free_skip_update:
711 * Parses tmplt and puts an ordered list of DS's into tmpl_idx.
713 * Returns 0 on success.
715 static int parse_template(
718 unsigned long *tmpl_cnt,
721 char *dsname, *tmplt_copy;
722 unsigned int tmpl_len, i;
725 *tmpl_cnt = 1; /* the first entry is the time */
727 /* we should work on a writeable copy here */
728 if ((tmplt_copy = strdup(tmplt)) == NULL) {
729 rrd_set_error("error copying tmplt '%s'", tmplt);
735 tmpl_len = strlen(tmplt_copy);
736 for (i = 0; i <= tmpl_len; i++) {
737 if (tmplt_copy[i] == ':' || tmplt_copy[i] == '\0') {
738 tmplt_copy[i] = '\0';
739 if (*tmpl_cnt > rrd->stat_head->ds_cnt) {
740 rrd_set_error("tmplt contains more DS definitions than RRD");
742 goto out_free_tmpl_copy;
744 if ((tmpl_idx[(*tmpl_cnt)++] = ds_match(rrd, dsname) + 1) == 0) {
745 rrd_set_error("unknown DS name '%s'", dsname);
747 goto out_free_tmpl_copy;
749 /* go to the next entry on the tmplt_copy */
751 dsname = &tmplt_copy[i + 1];
761 * Parse an update string, updates the primary data points (PDPs)
762 * and consolidated data points (CDPs), and writes changes to the RRAs.
764 * Returns 0 on success, -1 on error.
766 static int process_arg(
769 rrd_file_t *rrd_file,
770 unsigned long rra_begin,
771 time_t *current_time,
772 unsigned long *current_time_usec,
773 rrd_value_t *pdp_temp,
774 rrd_value_t *pdp_new,
775 unsigned long *rra_step_cnt,
778 unsigned long tmpl_cnt,
779 rrd_info_t ** pcdp_summary,
781 unsigned long *skip_update,
782 int *schedule_smooth)
784 rrd_value_t *seasonal_coef = NULL, *last_seasonal_coef = NULL;
786 /* a vector of future Holt-Winters seasonal coefs */
787 unsigned long elapsed_pdp_st;
789 double interval, pre_int, post_int; /* interval between this and
791 unsigned long proc_pdp_cnt;
793 if (parse_ds(rrd, updvals, tmpl_idx, step_start, tmpl_cnt,
794 current_time, current_time_usec, version) == -1) {
798 interval = (double) (*current_time - rrd->live_head->last_up)
799 + (double) ((long) *current_time_usec -
800 (long) rrd->live_head->last_up_usec) / 1e6f;
802 /* process the data sources and update the pdp_prep
803 * area accordingly */
804 if (update_pdp_prep(rrd, updvals, pdp_new, interval) == -1) {
808 elapsed_pdp_st = calculate_elapsed_steps(rrd,
810 *current_time_usec, interval,
814 /* has a pdp_st moment occurred since the last run ? */
815 if (elapsed_pdp_st == 0) {
816 /* no we have not passed a pdp_st moment. therefore update is simple */
817 simple_update(rrd, interval, pdp_new);
819 /* an pdp_st has occurred. */
820 if (process_all_pdp_st(rrd, interval,
822 elapsed_pdp_st, pdp_new, pdp_temp) == -1) {
825 if (update_all_cdp_prep(rrd, rra_step_cnt,
832 skip_update, schedule_smooth) == -1) {
833 goto err_free_coefficients;
835 if (update_aberrant_cdps(rrd, rrd_file, rra_begin,
836 elapsed_pdp_st, pdp_temp,
837 &seasonal_coef) == -1) {
838 goto err_free_coefficients;
840 if (write_to_rras(rrd, rrd_file, rra_step_cnt, rra_begin,
841 *current_time, skip_update,
842 pcdp_summary) == -1) {
843 goto err_free_coefficients;
845 } /* endif a pdp_st has occurred */
846 rrd->live_head->last_up = *current_time;
847 rrd->live_head->last_up_usec = *current_time_usec;
850 *rrd->legacy_last_up = rrd->live_head->last_up;
853 free(last_seasonal_coef);
856 err_free_coefficients:
858 free(last_seasonal_coef);
863 * Parse a DS string (time + colon-separated values), storing the
864 * results in current_time, current_time_usec, and updvals.
866 * Returns 0 on success, -1 on error.
873 unsigned long tmpl_cnt,
874 time_t *current_time,
875 unsigned long *current_time_usec,
883 /* initialize all ds input to unknown except the first one
884 which has always got to be set */
885 for (i = 1; i <= rrd->stat_head->ds_cnt; i++)
888 /* separate all ds elements; first must be examined separately
889 due to alternate time syntax */
890 if ((p = strchr(input, '@')) != NULL) {
892 } else if ((p = strchr(input, ':')) != NULL) {
895 rrd_set_error("expected timestamp not found in data source from %s",
901 updvals[tmpl_idx[i++]] = p + 1;
906 updvals[tmpl_idx[i++]] = p + 1;
912 rrd_set_error("expected %lu data source readings (got %lu) from %s",
913 tmpl_cnt - 1, i, input);
917 if (get_time_from_reading(rrd, timesyntax, updvals,
918 current_time, current_time_usec,
926 * Parse the time in a DS string, store it in current_time and
927 * current_time_usec and verify that it's later than the last
928 * update for this DS.
930 * Returns 0 on success, -1 on error.
932 static int get_time_from_reading(
936 time_t *current_time,
937 unsigned long *current_time_usec,
941 char *parsetime_error = NULL;
943 rrd_time_value_t ds_tv;
944 struct timeval tmp_time; /* used for time conversion */
946 /* get the time from the reading ... handle N */
947 if (timesyntax == '@') { /* at-style */
948 if ((parsetime_error = rrd_parsetime(updvals[0], &ds_tv))) {
949 rrd_set_error("ds time: %s: %s", updvals[0], parsetime_error);
952 if (ds_tv.type == RELATIVE_TO_END_TIME ||
953 ds_tv.type == RELATIVE_TO_START_TIME) {
954 rrd_set_error("specifying time relative to the 'start' "
955 "or 'end' makes no sense here: %s", updvals[0]);
958 *current_time = mktime(&ds_tv.tm) +ds_tv.offset;
959 *current_time_usec = 0; /* FIXME: how to handle usecs here ? */
960 } else if (strcmp(updvals[0], "N") == 0) {
961 gettimeofday(&tmp_time, 0);
962 normalize_time(&tmp_time);
963 *current_time = tmp_time.tv_sec;
964 *current_time_usec = tmp_time.tv_usec;
966 old_locale = setlocale(LC_NUMERIC, "C");
968 tmp = strtod(updvals[0], 0);
970 rrd_set_error("converting '%s' to float: %s",
971 updvals[0], rrd_strerror(errno));
974 setlocale(LC_NUMERIC, old_locale);
975 *current_time = floor(tmp);
976 *current_time_usec = (long) ((tmp - (double) *current_time) * 1e6f);
978 /* dont do any correction for old version RRDs */
980 *current_time_usec = 0;
982 if (*current_time < rrd->live_head->last_up ||
983 (*current_time == rrd->live_head->last_up &&
984 (long) *current_time_usec <= (long) rrd->live_head->last_up_usec)) {
985 rrd_set_error("illegal attempt to update using time %ld when "
986 "last update time is %ld (minimum one second step)",
987 *current_time, rrd->live_head->last_up);
994 * Update pdp_new by interpreting the updvals according to the DS type
995 * (COUNTER, GAUGE, etc.).
997 * Returns 0 on success, -1 on error.
999 static int update_pdp_prep(
1002 rrd_value_t *pdp_new,
1005 unsigned long ds_idx;
1007 char *endptr; /* used in the conversion */
1010 enum dst_en dst_idx;
1012 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1013 dst_idx = dst_conv(rrd->ds_def[ds_idx].dst);
1015 /* make sure we do not build diffs with old last_ds values */
1016 if (rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt < interval) {
1017 strncpy(rrd->pdp_prep[ds_idx].last_ds, "U", LAST_DS_LEN - 1);
1018 rrd->pdp_prep[ds_idx].last_ds[LAST_DS_LEN - 1] = '\0';
1021 /* NOTE: DST_CDEF should never enter this if block, because
1022 * updvals[ds_idx+1][0] is initialized to 'U'; unless the caller
1023 * accidently specified a value for the DST_CDEF. To handle this case,
1024 * an extra check is required. */
1026 if ((updvals[ds_idx + 1][0] != 'U') &&
1027 (dst_idx != DST_CDEF) &&
1028 rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt >= interval) {
1031 /* pdp_new contains rate * time ... eg the bytes transferred during
1032 * the interval. Doing it this way saves a lot of math operations
1037 for (ii = 0; updvals[ds_idx + 1][ii] != '\0'; ii++) {
1038 if ((updvals[ds_idx + 1][ii] < '0'
1039 || updvals[ds_idx + 1][ii] > '9')
1040 && (ii != 0 && updvals[ds_idx + 1][ii] != '-')) {
1041 rrd_set_error("not a simple integer: '%s'",
1042 updvals[ds_idx + 1]);
1046 if (rrd->pdp_prep[ds_idx].last_ds[0] != 'U') {
1048 rrd_diff(updvals[ds_idx + 1],
1049 rrd->pdp_prep[ds_idx].last_ds);
1050 if (dst_idx == DST_COUNTER) {
1051 /* simple overflow catcher. This will fail
1052 * terribly for non 32 or 64 bit counters
1053 * ... are there any others in SNMP land?
1055 if (pdp_new[ds_idx] < (double) 0.0)
1056 pdp_new[ds_idx] += (double) 4294967296.0; /* 2^32 */
1057 if (pdp_new[ds_idx] < (double) 0.0)
1058 pdp_new[ds_idx] += (double) 18446744069414584320.0; /* 2^64-2^32 */
1060 rate = pdp_new[ds_idx] / interval;
1062 pdp_new[ds_idx] = DNAN;
1066 old_locale = setlocale(LC_NUMERIC, "C");
1068 pdp_new[ds_idx] = strtod(updvals[ds_idx + 1], &endptr);
1070 rrd_set_error("converting '%s' to float: %s",
1071 updvals[ds_idx + 1], rrd_strerror(errno));
1074 setlocale(LC_NUMERIC, old_locale);
1075 if (endptr[0] != '\0') {
1077 ("conversion of '%s' to float not complete: tail '%s'",
1078 updvals[ds_idx + 1], endptr);
1081 rate = pdp_new[ds_idx] / interval;
1085 old_locale = setlocale(LC_NUMERIC, "C");
1087 strtod(updvals[ds_idx + 1], &endptr) * interval;
1089 rrd_set_error("converting '%s' to float: %s",
1090 updvals[ds_idx + 1], rrd_strerror(errno));
1093 setlocale(LC_NUMERIC, old_locale);
1094 if (endptr[0] != '\0') {
1096 ("conversion of '%s' to float not complete: tail '%s'",
1097 updvals[ds_idx + 1], endptr);
1100 rate = pdp_new[ds_idx] / interval;
1103 rrd_set_error("rrd contains unknown DS type : '%s'",
1104 rrd->ds_def[ds_idx].dst);
1107 /* break out of this for loop if the error string is set */
1108 if (rrd_test_error()) {
1111 /* make sure pdp_temp is neither too large or too small
1112 * if any of these occur it becomes unknown ...
1113 * sorry folks ... */
1115 ((!isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
1116 rate > rrd->ds_def[ds_idx].par[DS_max_val].u_val) ||
1117 (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
1118 rate < rrd->ds_def[ds_idx].par[DS_min_val].u_val))) {
1119 pdp_new[ds_idx] = DNAN;
1122 /* no news is news all the same */
1123 pdp_new[ds_idx] = DNAN;
1127 /* make a copy of the command line argument for the next run */
1129 fprintf(stderr, "prep ds[%lu]\t"
1133 ds_idx, rrd->pdp_prep[ds_idx].last_ds, updvals[ds_idx + 1],
1136 strncpy(rrd->pdp_prep[ds_idx].last_ds, updvals[ds_idx + 1],
1138 rrd->pdp_prep[ds_idx].last_ds[LAST_DS_LEN - 1] = '\0';
1144 * How many PDP steps have elapsed since the last update? Returns the answer,
1145 * and stores the time between the last update and the last PDP in pre_time,
1146 * and the time between the last PDP and the current time in post_int.
1148 static int calculate_elapsed_steps(
1150 unsigned long current_time,
1151 unsigned long current_time_usec,
1155 unsigned long *proc_pdp_cnt)
1157 unsigned long proc_pdp_st; /* which pdp_st was the last to be processed */
1158 unsigned long occu_pdp_st; /* when was the pdp_st before the last update
1160 unsigned long proc_pdp_age; /* how old was the data in the pdp prep area
1161 * when it was last updated */
1162 unsigned long occu_pdp_age; /* how long ago was the last pdp_step time */
1164 /* when was the current pdp started */
1165 proc_pdp_age = rrd->live_head->last_up % rrd->stat_head->pdp_step;
1166 proc_pdp_st = rrd->live_head->last_up - proc_pdp_age;
1168 /* when did the last pdp_st occur */
1169 occu_pdp_age = current_time % rrd->stat_head->pdp_step;
1170 occu_pdp_st = current_time - occu_pdp_age;
1172 if (occu_pdp_st > proc_pdp_st) {
1173 /* OK we passed the pdp_st moment */
1174 *pre_int = (long) occu_pdp_st - rrd->live_head->last_up; /* how much of the input data
1175 * occurred before the latest
1177 *pre_int -= ((double) rrd->live_head->last_up_usec) / 1e6f; /* adjust usecs */
1178 *post_int = occu_pdp_age; /* how much after it */
1179 *post_int += ((double) current_time_usec) / 1e6f; /* adjust usecs */
1181 *pre_int = interval;
1185 *proc_pdp_cnt = proc_pdp_st / rrd->stat_head->pdp_step;
1188 printf("proc_pdp_age %lu\t"
1190 "occu_pfp_age %lu\t"
1194 "post_int %lf\n", proc_pdp_age, proc_pdp_st,
1195 occu_pdp_age, occu_pdp_st, interval, *pre_int, *post_int);
1198 /* compute the number of elapsed pdp_st moments */
1199 return (occu_pdp_st - proc_pdp_st) / rrd->stat_head->pdp_step;
1203 * Increment the PDP values by the values in pdp_new, or else initialize them.
1205 static void simple_update(
1208 rrd_value_t *pdp_new)
1212 for (i = 0; i < (signed) rrd->stat_head->ds_cnt; i++) {
1213 if (isnan(pdp_new[i])) {
1214 /* this is not really accurate if we use subsecond data arrival time
1215 should have thought of it when going subsecond resolution ...
1216 sorry next format change we will have it! */
1217 rrd->pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt +=
1220 if (isnan(rrd->pdp_prep[i].scratch[PDP_val].u_val)) {
1221 rrd->pdp_prep[i].scratch[PDP_val].u_val = pdp_new[i];
1223 rrd->pdp_prep[i].scratch[PDP_val].u_val += pdp_new[i];
1232 rrd->pdp_prep[i].scratch[PDP_val].u_val,
1233 rrd->pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt);
1239 * Call process_pdp_st for each DS.
1241 * Returns 0 on success, -1 on error.
1243 static int process_all_pdp_st(
1248 unsigned long elapsed_pdp_st,
1249 rrd_value_t *pdp_new,
1250 rrd_value_t *pdp_temp)
1252 unsigned long ds_idx;
1254 /* in pdp_prep[].scratch[PDP_val].u_val we have collected
1255 rate*seconds which occurred up to the last run.
1256 pdp_new[] contains rate*seconds from the latest run.
1257 pdp_temp[] will contain the rate for cdp */
1259 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1260 if (process_pdp_st(rrd, ds_idx, interval, pre_int, post_int,
1261 elapsed_pdp_st * rrd->stat_head->pdp_step,
1262 pdp_new, pdp_temp) == -1) {
1266 fprintf(stderr, "PDP UPD ds[%lu]\t"
1267 "elapsed_pdp_st %lu\t"
1270 "new_unkn_sec %5lu\n",
1274 rrd->pdp_prep[ds_idx].scratch[PDP_val].u_val,
1275 rrd->pdp_prep[ds_idx].scratch[PDP_unkn_sec_cnt].u_cnt);
1282 * Process an update that occurs after one of the PDP moments.
1283 * Increments the PDP value, sets NAN if time greater than the
1284 * heartbeats have elapsed, processes CDEFs.
1286 * Returns 0 on success, -1 on error.
1288 static int process_pdp_st(
1290 unsigned long ds_idx,
1294 long diff_pdp_st, /* number of seconds in full steps passed since last update */
1295 rrd_value_t *pdp_new,
1296 rrd_value_t *pdp_temp)
1300 /* update pdp_prep to the current pdp_st. */
1301 double pre_unknown = 0.0;
1302 unival *scratch = rrd->pdp_prep[ds_idx].scratch;
1303 unsigned long mrhb = rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt;
1305 rpnstack_t rpnstack; /* used for COMPUTE DS */
1307 rpnstack_init(&rpnstack);
1310 if (isnan(pdp_new[ds_idx])) {
1311 /* a final bit of unknown to be added before calculation
1312 we use a temporary variable for this so that we
1313 don't have to turn integer lines before using the value */
1314 pre_unknown = pre_int;
1316 if (isnan(scratch[PDP_val].u_val)) {
1317 scratch[PDP_val].u_val = 0;
1319 scratch[PDP_val].u_val += pdp_new[ds_idx] / interval * pre_int;
1322 /* if too much of the pdp_prep is unknown we dump it */
1323 /* if the interval is larger thatn mrhb we get NAN */
1324 if ((interval > mrhb) ||
1325 (rrd->stat_head->pdp_step / 2.0 <
1326 (signed) scratch[PDP_unkn_sec_cnt].u_cnt)) {
1327 pdp_temp[ds_idx] = DNAN;
1329 pdp_temp[ds_idx] = scratch[PDP_val].u_val /
1330 ((double) (diff_pdp_st - scratch[PDP_unkn_sec_cnt].u_cnt) -
1334 /* process CDEF data sources; remember each CDEF DS can
1335 * only reference other DS with a lower index number */
1336 if (dst_conv(rrd->ds_def[ds_idx].dst) == DST_CDEF) {
1340 rpn_expand((rpn_cdefds_t *) &(rrd->ds_def[ds_idx].par[DS_cdef]));
1341 /* substitute data values for OP_VARIABLE nodes */
1342 for (i = 0; rpnp[i].op != OP_END; i++) {
1343 if (rpnp[i].op == OP_VARIABLE) {
1344 rpnp[i].op = OP_NUMBER;
1345 rpnp[i].val = pdp_temp[rpnp[i].ptr];
1348 /* run the rpn calculator */
1349 if (rpn_calc(rpnp, &rpnstack, 0, pdp_temp, ds_idx) == -1) {
1351 rpnstack_free(&rpnstack);
1356 /* make pdp_prep ready for the next run */
1357 if (isnan(pdp_new[ds_idx])) {
1358 /* this is not realy accurate if we use subsecond data arival time
1359 should have thought of it when going subsecond resolution ...
1360 sorry next format change we will have it! */
1361 scratch[PDP_unkn_sec_cnt].u_cnt = floor(post_int);
1362 scratch[PDP_val].u_val = DNAN;
1364 scratch[PDP_unkn_sec_cnt].u_cnt = 0;
1365 scratch[PDP_val].u_val = pdp_new[ds_idx] / interval * post_int;
1367 rpnstack_free(&rpnstack);
1372 * Iterate over all the RRAs for a given DS and:
1373 * 1. Decide whether to schedule a smooth later
1374 * 2. Decide whether to skip updating SEASONAL and DEVSEASONAL
1377 * Returns 0 on success, -1 on error
1379 static int update_all_cdp_prep(
1381 unsigned long *rra_step_cnt,
1382 unsigned long rra_begin,
1383 rrd_file_t *rrd_file,
1384 unsigned long elapsed_pdp_st,
1385 unsigned long proc_pdp_cnt,
1386 rrd_value_t **last_seasonal_coef,
1387 rrd_value_t **seasonal_coef,
1388 rrd_value_t *pdp_temp,
1389 unsigned long *skip_update,
1390 int *schedule_smooth)
1392 unsigned long rra_idx;
1394 /* index into the CDP scratch array */
1395 enum cf_en current_cf;
1396 unsigned long rra_start;
1398 /* number of rows to be updated in an RRA for a data value. */
1399 unsigned long start_pdp_offset;
1401 rra_start = rra_begin;
1402 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1403 current_cf = cf_conv(rrd->rra_def[rra_idx].cf_nam);
1405 rrd->rra_def[rra_idx].pdp_cnt -
1406 proc_pdp_cnt % rrd->rra_def[rra_idx].pdp_cnt;
1407 skip_update[rra_idx] = 0;
1408 if (start_pdp_offset <= elapsed_pdp_st) {
1409 rra_step_cnt[rra_idx] = (elapsed_pdp_st - start_pdp_offset) /
1410 rrd->rra_def[rra_idx].pdp_cnt + 1;
1412 rra_step_cnt[rra_idx] = 0;
1415 if (current_cf == CF_SEASONAL || current_cf == CF_DEVSEASONAL) {
1416 /* If this is a bulk update, we need to skip ahead in the seasonal arrays
1417 * so that they will be correct for the next observed value; note that for
1418 * the bulk update itself, no update will occur to DEVSEASONAL or SEASONAL;
1419 * futhermore, HWPREDICT and DEVPREDICT will be set to DNAN. */
1420 if (rra_step_cnt[rra_idx] > 1) {
1421 skip_update[rra_idx] = 1;
1422 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1423 elapsed_pdp_st, last_seasonal_coef);
1424 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1425 elapsed_pdp_st + 1, seasonal_coef);
1427 /* periodically run a smoother for seasonal effects */
1428 if (do_schedule_smooth(rrd, rra_idx, elapsed_pdp_st)) {
1431 "schedule_smooth: cur_row %lu, elapsed_pdp_st %lu, smooth idx %lu\n",
1432 rrd->rra_ptr[rra_idx].cur_row, elapsed_pdp_st,
1433 rrd->rra_def[rra_idx].par[RRA_seasonal_smooth_idx].
1436 *schedule_smooth = 1;
1439 if (rrd_test_error())
1443 (rrd, elapsed_pdp_st, start_pdp_offset, rra_step_cnt, rra_idx,
1444 pdp_temp, *last_seasonal_coef, *seasonal_coef,
1445 current_cf) == -1) {
1449 rrd->rra_def[rra_idx].row_cnt * rrd->stat_head->ds_cnt *
1450 sizeof(rrd_value_t);
1456 * Are we due for a smooth? Also increments our position in the burn-in cycle.
1458 static int do_schedule_smooth(
1460 unsigned long rra_idx,
1461 unsigned long elapsed_pdp_st)
1463 unsigned long cdp_idx = rra_idx * (rrd->stat_head->ds_cnt);
1464 unsigned long cur_row = rrd->rra_ptr[rra_idx].cur_row;
1465 unsigned long row_cnt = rrd->rra_def[rra_idx].row_cnt;
1466 unsigned long seasonal_smooth_idx =
1467 rrd->rra_def[rra_idx].par[RRA_seasonal_smooth_idx].u_cnt;
1468 unsigned long *init_seasonal =
1469 &(rrd->cdp_prep[cdp_idx].scratch[CDP_init_seasonal].u_cnt);
1471 /* Need to use first cdp parameter buffer to track burnin (burnin requires
1472 * a specific smoothing schedule). The CDP_init_seasonal parameter is
1473 * really an RRA level, not a data source within RRA level parameter, but
1474 * the rra_def is read only for rrd_update (not flushed to disk). */
1475 if (*init_seasonal > BURNIN_CYCLES) {
1476 /* someone has no doubt invented a trick to deal with this wrap around,
1477 * but at least this code is clear. */
1478 if (seasonal_smooth_idx > cur_row) {
1479 /* here elapsed_pdp_st = rra_step_cnt[rra_idx] because of 1-1 mapping
1480 * between PDP and CDP */
1481 return (cur_row + elapsed_pdp_st >= seasonal_smooth_idx);
1483 /* can't rely on negative numbers because we are working with
1484 * unsigned values */
1485 return (cur_row + elapsed_pdp_st >= row_cnt
1486 && cur_row + elapsed_pdp_st >= row_cnt + seasonal_smooth_idx);
1488 /* mark off one of the burn-in cycles */
1489 return (cur_row + elapsed_pdp_st >= row_cnt && ++(*init_seasonal));
1493 * For a given RRA, iterate over the data sources and call the appropriate
1494 * consolidation function.
1496 * Returns 0 on success, -1 on error.
1498 static int update_cdp_prep(
1500 unsigned long elapsed_pdp_st,
1501 unsigned long start_pdp_offset,
1502 unsigned long *rra_step_cnt,
1504 rrd_value_t *pdp_temp,
1505 rrd_value_t *last_seasonal_coef,
1506 rrd_value_t *seasonal_coef,
1509 unsigned long ds_idx, cdp_idx;
1511 /* update CDP_PREP areas */
1512 /* loop over data soures within each RRA */
1513 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1515 cdp_idx = rra_idx * rrd->stat_head->ds_cnt + ds_idx;
1517 if (rrd->rra_def[rra_idx].pdp_cnt > 1) {
1518 update_cdp(rrd->cdp_prep[cdp_idx].scratch, current_cf,
1519 pdp_temp[ds_idx], rra_step_cnt[rra_idx],
1520 elapsed_pdp_st, start_pdp_offset,
1521 rrd->rra_def[rra_idx].pdp_cnt,
1522 rrd->rra_def[rra_idx].par[RRA_cdp_xff_val].u_val,
1525 /* Nothing to consolidate if there's one PDP per CDP. However, if
1526 * we've missed some PDPs, let's update null counters etc. */
1527 if (elapsed_pdp_st > 2) {
1528 reset_cdp(rrd, elapsed_pdp_st, pdp_temp, last_seasonal_coef,
1529 seasonal_coef, rra_idx, ds_idx, cdp_idx,
1534 if (rrd_test_error())
1536 } /* endif data sources loop */
1541 * Given the new reading (pdp_temp_val), update or initialize the CDP value,
1542 * primary value, secondary value, and # of unknowns.
1544 static void update_cdp(
1547 rrd_value_t pdp_temp_val,
1548 unsigned long rra_step_cnt,
1549 unsigned long elapsed_pdp_st,
1550 unsigned long start_pdp_offset,
1551 unsigned long pdp_cnt,
1556 /* shorthand variables */
1557 rrd_value_t *cdp_val = &scratch[CDP_val].u_val;
1558 rrd_value_t *cdp_primary_val = &scratch[CDP_primary_val].u_val;
1559 rrd_value_t *cdp_secondary_val = &scratch[CDP_secondary_val].u_val;
1560 unsigned long *cdp_unkn_pdp_cnt = &scratch[CDP_unkn_pdp_cnt].u_cnt;
1563 /* If we are in this block, as least 1 CDP value will be written to
1564 * disk, this is the CDP_primary_val entry. If more than 1 value needs
1565 * to be written, then the "fill in" value is the CDP_secondary_val
1567 if (isnan(pdp_temp_val)) {
1568 *cdp_unkn_pdp_cnt += start_pdp_offset;
1569 *cdp_secondary_val = DNAN;
1571 /* CDP_secondary value is the RRA "fill in" value for intermediary
1572 * CDP data entries. No matter the CF, the value is the same because
1573 * the average, max, min, and last of a list of identical values is
1574 * the same, namely, the value itself. */
1575 *cdp_secondary_val = pdp_temp_val;
1578 if (*cdp_unkn_pdp_cnt > pdp_cnt * xff) {
1579 *cdp_primary_val = DNAN;
1580 if (current_cf == CF_AVERAGE) {
1582 initialize_average_carry_over(pdp_temp_val,
1584 start_pdp_offset, pdp_cnt);
1586 *cdp_val = pdp_temp_val;
1589 initialize_cdp_val(scratch, current_cf, pdp_temp_val,
1590 elapsed_pdp_st, start_pdp_offset, pdp_cnt);
1591 } /* endif meets xff value requirement for a valid value */
1592 /* initialize carry over CDP_unkn_pdp_cnt, this must after CDP_primary_val
1593 * is set because CDP_unkn_pdp_cnt is required to compute that value. */
1594 if (isnan(pdp_temp_val))
1595 *cdp_unkn_pdp_cnt = (elapsed_pdp_st - start_pdp_offset) % pdp_cnt;
1597 *cdp_unkn_pdp_cnt = 0;
1598 } else { /* rra_step_cnt[i] == 0 */
1601 if (isnan(*cdp_val)) {
1602 fprintf(stderr, "schedule CDP_val update, RRA %d DS %d, DNAN\n",
1605 fprintf(stderr, "schedule CDP_val update, RRA %d DS %d, %10.2f\n",
1609 if (isnan(pdp_temp_val)) {
1610 *cdp_unkn_pdp_cnt += elapsed_pdp_st;
1613 calculate_cdp_val(*cdp_val, pdp_temp_val, elapsed_pdp_st,
1620 * Set the CDP_primary_val and CDP_val to the appropriate initial value based
1621 * on the type of consolidation function.
1623 static void initialize_cdp_val(
1626 rrd_value_t pdp_temp_val,
1627 unsigned long elapsed_pdp_st,
1628 unsigned long start_pdp_offset,
1629 unsigned long pdp_cnt)
1631 rrd_value_t cum_val, cur_val;
1633 switch (current_cf) {
1635 cum_val = IFDNAN(scratch[CDP_val].u_val, 0.0);
1636 cur_val = IFDNAN(pdp_temp_val, 0.0);
1637 scratch[CDP_primary_val].u_val =
1638 (cum_val + cur_val * start_pdp_offset) /
1639 (pdp_cnt - scratch[CDP_unkn_pdp_cnt].u_cnt);
1640 scratch[CDP_val].u_val =
1641 initialize_average_carry_over(pdp_temp_val, elapsed_pdp_st,
1642 start_pdp_offset, pdp_cnt);
1645 cum_val = IFDNAN(scratch[CDP_val].u_val, -DINF);
1646 cur_val = IFDNAN(pdp_temp_val, -DINF);
1649 if (isnan(scratch[CDP_val].u_val) && isnan(pdp_temp)) {
1651 "RRA %lu, DS %lu, both CDP_val and pdp_temp are DNAN!",
1657 if (cur_val > cum_val)
1658 scratch[CDP_primary_val].u_val = cur_val;
1660 scratch[CDP_primary_val].u_val = cum_val;
1661 /* initialize carry over value */
1662 scratch[CDP_val].u_val = pdp_temp_val;
1665 cum_val = IFDNAN(scratch[CDP_val].u_val, DINF);
1666 cur_val = IFDNAN(pdp_temp_val, DINF);
1669 if (isnan(scratch[CDP_val].u_val) && isnan(pdp_temp)) {
1671 "RRA %lu, DS %lu, both CDP_val and pdp_temp are DNAN!", i,
1677 if (cur_val < cum_val)
1678 scratch[CDP_primary_val].u_val = cur_val;
1680 scratch[CDP_primary_val].u_val = cum_val;
1681 /* initialize carry over value */
1682 scratch[CDP_val].u_val = pdp_temp_val;
1686 scratch[CDP_primary_val].u_val = pdp_temp_val;
1687 /* initialize carry over value */
1688 scratch[CDP_val].u_val = pdp_temp_val;
1694 * Update the consolidation function for Holt-Winters functions as
1695 * well as other functions that don't actually consolidate multiple
1698 static void reset_cdp(
1700 unsigned long elapsed_pdp_st,
1701 rrd_value_t *pdp_temp,
1702 rrd_value_t *last_seasonal_coef,
1703 rrd_value_t *seasonal_coef,
1707 enum cf_en current_cf)
1709 unival *scratch = rrd->cdp_prep[cdp_idx].scratch;
1711 switch (current_cf) {
1714 scratch[CDP_primary_val].u_val = pdp_temp[ds_idx];
1715 scratch[CDP_secondary_val].u_val = pdp_temp[ds_idx];
1718 case CF_DEVSEASONAL:
1719 /* need to update cached seasonal values, so they are consistent
1720 * with the bulk update */
1721 /* WARNING: code relies on the fact that CDP_hw_last_seasonal and
1722 * CDP_last_deviation are the same. */
1723 scratch[CDP_hw_last_seasonal].u_val = last_seasonal_coef[ds_idx];
1724 scratch[CDP_hw_seasonal].u_val = seasonal_coef[ds_idx];
1728 /* need to update the null_count and last_null_count.
1729 * even do this for non-DNAN pdp_temp because the
1730 * algorithm is not learning from batch updates. */
1731 scratch[CDP_null_count].u_cnt += elapsed_pdp_st;
1732 scratch[CDP_last_null_count].u_cnt += elapsed_pdp_st - 1;
1735 scratch[CDP_primary_val].u_val = DNAN;
1736 scratch[CDP_secondary_val].u_val = DNAN;
1739 /* do not count missed bulk values as failures */
1740 scratch[CDP_primary_val].u_val = 0;
1741 scratch[CDP_secondary_val].u_val = 0;
1742 /* need to reset violations buffer.
1743 * could do this more carefully, but for now, just
1744 * assume a bulk update wipes away all violations. */
1745 erase_violations(rrd, cdp_idx, rra_idx);
1750 static rrd_value_t initialize_average_carry_over(
1751 rrd_value_t pdp_temp_val,
1752 unsigned long elapsed_pdp_st,
1753 unsigned long start_pdp_offset,
1754 unsigned long pdp_cnt)
1756 /* initialize carry over value */
1757 if (isnan(pdp_temp_val)) {
1760 return pdp_temp_val * ((elapsed_pdp_st - start_pdp_offset) % pdp_cnt);
1764 * Update or initialize a CDP value based on the consolidation
1767 * Returns the new value.
1769 static rrd_value_t calculate_cdp_val(
1770 rrd_value_t cdp_val,
1771 rrd_value_t pdp_temp_val,
1772 unsigned long elapsed_pdp_st,
1783 if (isnan(cdp_val)) {
1784 if (current_cf == CF_AVERAGE) {
1785 pdp_temp_val *= elapsed_pdp_st;
1788 fprintf(stderr, "Initialize CDP_val for RRA %d DS %d: %10.2f\n",
1789 i, ii, pdp_temp_val);
1791 return pdp_temp_val;
1793 if (current_cf == CF_AVERAGE)
1794 return cdp_val + pdp_temp_val * elapsed_pdp_st;
1795 if (current_cf == CF_MINIMUM)
1796 return (pdp_temp_val < cdp_val) ? pdp_temp_val : cdp_val;
1797 if (current_cf == CF_MAXIMUM)
1798 return (pdp_temp_val > cdp_val) ? pdp_temp_val : cdp_val;
1800 return pdp_temp_val;
1804 * For each RRA, update the seasonal values and then call update_aberrant_CF
1805 * for each data source.
1807 * Return 0 on success, -1 on error.
1809 static int update_aberrant_cdps(
1811 rrd_file_t *rrd_file,
1812 unsigned long rra_begin,
1813 unsigned long elapsed_pdp_st,
1814 rrd_value_t *pdp_temp,
1815 rrd_value_t **seasonal_coef)
1817 unsigned long rra_idx, ds_idx, j;
1819 /* number of PDP steps since the last update that
1820 * are assigned to the first CDP to be generated
1821 * since the last update. */
1822 unsigned short scratch_idx;
1823 unsigned long rra_start;
1824 enum cf_en current_cf;
1826 /* this loop is only entered if elapsed_pdp_st < 3 */
1827 for (j = elapsed_pdp_st, scratch_idx = CDP_primary_val;
1828 j > 0 && j < 3; j--, scratch_idx = CDP_secondary_val) {
1829 rra_start = rra_begin;
1830 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1831 if (rrd->rra_def[rra_idx].pdp_cnt == 1) {
1832 current_cf = cf_conv(rrd->rra_def[rra_idx].cf_nam);
1833 if (current_cf == CF_SEASONAL || current_cf == CF_DEVSEASONAL) {
1834 if (scratch_idx == CDP_primary_val) {
1835 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1836 elapsed_pdp_st + 1, seasonal_coef);
1838 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1839 elapsed_pdp_st + 2, seasonal_coef);
1842 if (rrd_test_error())
1844 /* loop over data soures within each RRA */
1845 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1846 update_aberrant_CF(rrd, pdp_temp[ds_idx], current_cf,
1847 rra_idx * (rrd->stat_head->ds_cnt) +
1848 ds_idx, rra_idx, ds_idx, scratch_idx,
1852 rra_start += rrd->rra_def[rra_idx].row_cnt
1853 * rrd->stat_head->ds_cnt * sizeof(rrd_value_t);
1860 * Move sequentially through the file, writing one RRA at a time. Note this
1861 * architecture divorces the computation of CDP with flushing updated RRA
1864 * Return 0 on success, -1 on error.
1866 static int write_to_rras(
1868 rrd_file_t *rrd_file,
1869 unsigned long *rra_step_cnt,
1870 unsigned long rra_begin,
1871 time_t current_time,
1872 unsigned long *skip_update,
1873 rrd_info_t ** pcdp_summary)
1875 unsigned long rra_idx;
1876 unsigned long rra_start;
1877 time_t rra_time = 0; /* time of update for a RRA */
1879 unsigned long ds_cnt = rrd->stat_head->ds_cnt;
1881 /* Ready to write to disk */
1882 rra_start = rra_begin;
1884 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1885 rra_def_t *rra_def = &rrd->rra_def[rra_idx];
1886 rra_ptr_t *rra_ptr = &rrd->rra_ptr[rra_idx];
1889 unsigned short scratch_idx;
1890 unsigned long step_subtract;
1892 for (scratch_idx = CDP_primary_val,
1894 rra_step_cnt[rra_idx] > 0;
1895 rra_step_cnt[rra_idx]--,
1896 scratch_idx = CDP_secondary_val,
1897 step_subtract = 2) {
1901 fprintf(stderr, " -- RRA Preseek %ld\n", rrd_file->pos);
1903 /* increment, with wrap-around */
1904 if (++rra_ptr->cur_row >= rra_def->row_cnt)
1905 rra_ptr->cur_row = 0;
1907 /* we know what our position should be */
1908 rra_pos_new = rra_start
1909 + ds_cnt * rra_ptr->cur_row * sizeof(rrd_value_t);
1911 /* re-seek if the position is wrong or we wrapped around */
1912 if ((size_t)rra_pos_new != rrd_file->pos) {
1913 if (rrd_seek(rrd_file, rra_pos_new, SEEK_SET) != 0) {
1914 rrd_set_error("seek error in rrd");
1919 fprintf(stderr, " -- RRA Postseek %ld\n", rrd_file->pos);
1922 if (skip_update[rra_idx])
1925 if (*pcdp_summary != NULL) {
1926 unsigned long step_time = rra_def->pdp_cnt * rrd->stat_head->pdp_step;
1928 rra_time = (current_time - current_time % step_time)
1929 - ((rra_step_cnt[rra_idx] - step_subtract) * step_time);
1933 (rrd_file, rrd, rra_idx, scratch_idx,
1934 pcdp_summary, rra_time) == -1)
1937 rrd_notify_row(rrd_file, rra_idx, rra_pos_new, rra_time);
1940 rra_start += rra_def->row_cnt * ds_cnt * sizeof(rrd_value_t);
1947 * Write out one row of values (one value per DS) to the archive.
1949 * Returns 0 on success, -1 on error.
1951 static int write_RRA_row(
1952 rrd_file_t *rrd_file,
1954 unsigned long rra_idx,
1955 unsigned short CDP_scratch_idx,
1956 rrd_info_t ** pcdp_summary,
1959 unsigned long ds_idx, cdp_idx;
1962 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1963 /* compute the cdp index */
1964 cdp_idx = rra_idx * (rrd->stat_head->ds_cnt) + ds_idx;
1966 fprintf(stderr, " -- RRA WRITE VALUE %e, at %ld CF:%s\n",
1967 rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].u_val,
1968 rrd_file->pos, rrd->rra_def[rra_idx].cf_nam);
1970 if (*pcdp_summary != NULL) {
1971 iv.u_val = rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].u_val;
1972 /* append info to the return hash */
1973 *pcdp_summary = rrd_info_push(*pcdp_summary,
1975 ("[%lli]RRA[%s][%lu]DS[%s]",
1976 (long long)rra_time,
1977 rrd->rra_def[rra_idx].cf_nam,
1978 rrd->rra_def[rra_idx].pdp_cnt,
1979 rrd->ds_def[ds_idx].ds_nam),
1982 if (rrd_write(rrd_file,
1983 &(rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].
1984 u_val), sizeof(rrd_value_t)) != sizeof(rrd_value_t)) {
1985 rrd_set_error("writing rrd: %s", rrd_strerror(errno));
1993 * Call apply_smoother for all DEVSEASONAL and SEASONAL RRAs.
1995 * Returns 0 on success, -1 otherwise
1997 static int smooth_all_rras(
1999 rrd_file_t *rrd_file,
2000 unsigned long rra_begin)
2002 unsigned long rra_start = rra_begin;
2003 unsigned long rra_idx;
2005 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; ++rra_idx) {
2006 if (cf_conv(rrd->rra_def[rra_idx].cf_nam) == CF_DEVSEASONAL ||
2007 cf_conv(rrd->rra_def[rra_idx].cf_nam) == CF_SEASONAL) {
2009 fprintf(stderr, "Running smoother for rra %lu\n", rra_idx);
2011 apply_smoother(rrd, rra_idx, rra_start, rrd_file);
2012 if (rrd_test_error())
2015 rra_start += rrd->rra_def[rra_idx].row_cnt
2016 * rrd->stat_head->ds_cnt * sizeof(rrd_value_t);
2023 * Flush changes to disk (unless we're using mmap)
2025 * Returns 0 on success, -1 otherwise
2027 static int write_changes_to_disk(
2029 rrd_file_t *rrd_file,
2032 /* we just need to write back the live header portion now */
2033 if (rrd_seek(rrd_file, (sizeof(stat_head_t)
2034 + sizeof(ds_def_t) * rrd->stat_head->ds_cnt
2035 + sizeof(rra_def_t) * rrd->stat_head->rra_cnt),
2037 rrd_set_error("seek rrd for live header writeback");
2041 if (rrd_write(rrd_file, rrd->live_head,
2042 sizeof(live_head_t) * 1) != sizeof(live_head_t) * 1) {
2043 rrd_set_error("rrd_write live_head to rrd");
2047 if (rrd_write(rrd_file, rrd->legacy_last_up,
2048 sizeof(time_t) * 1) != sizeof(time_t) * 1) {
2049 rrd_set_error("rrd_write live_head to rrd");
2055 if (rrd_write(rrd_file, rrd->pdp_prep,
2056 sizeof(pdp_prep_t) * rrd->stat_head->ds_cnt)
2057 != (ssize_t) (sizeof(pdp_prep_t) * rrd->stat_head->ds_cnt)) {
2058 rrd_set_error("rrd_write pdp_prep to rrd");
2062 if (rrd_write(rrd_file, rrd->cdp_prep,
2063 sizeof(cdp_prep_t) * rrd->stat_head->rra_cnt *
2064 rrd->stat_head->ds_cnt)
2065 != (ssize_t) (sizeof(cdp_prep_t) * rrd->stat_head->rra_cnt *
2066 rrd->stat_head->ds_cnt)) {
2068 rrd_set_error("rrd_write cdp_prep to rrd");
2072 if (rrd_write(rrd_file, rrd->rra_ptr,
2073 sizeof(rra_ptr_t) * rrd->stat_head->rra_cnt)
2074 != (ssize_t) (sizeof(rra_ptr_t) * rrd->stat_head->rra_cnt)) {
2075 rrd_set_error("rrd_write rra_ptr to rrd");