1 /*****************************************************************************
2 * RRDtool 1.2.99907080300 Copyright by Tobi Oetiker, 1997-2007
3 *****************************************************************************
4 * rrd_create.c creates new rrds
5 *****************************************************************************/
10 #include "rrd_rpncalc.h"
13 #include "rrd_is_thread_safe.h"
15 unsigned long FnvHash(
17 int create_hw_contingent_rras(
19 unsigned short period,
20 unsigned long hashed_name);
30 struct option long_options[] = {
31 {"start", required_argument, 0, 'b'},
32 {"step", required_argument, 0, 's'},
37 time_t last_up = time(NULL) - 10;
38 unsigned long pdp_step = 300;
39 struct rrd_time_value last_up_tv;
40 char *parsetime_error = NULL;
45 opterr = 0; /* initialize getopt */
48 opt = getopt_long(argc, argv, "b:s:", long_options, &option_index);
55 if ((parsetime_error = parsetime(optarg, &last_up_tv))) {
56 rrd_set_error("start time: %s", parsetime_error);
59 if (last_up_tv.type == RELATIVE_TO_END_TIME ||
60 last_up_tv.type == RELATIVE_TO_START_TIME) {
61 rrd_set_error("specifying time relative to the 'start' "
62 "or 'end' makes no sense here");
66 last_up = mktime(&last_up_tv.tm) +last_up_tv.offset;
68 if (last_up < 3600 * 24 * 365 * 10) {
70 ("the first entry to the RRD should be after 1980");
76 long_tmp = atol(optarg);
78 rrd_set_error("step size should be no less than one second");
86 rrd_set_error("unknown option '%c'", optopt);
88 rrd_set_error("unknown option '%s'", argv[optind - 1]);
93 rrd_set_error("need name of an rrd file to create");
96 rc = rrd_create_r(argv[optind],
98 argc - optind - 1, (const char **) (argv + optind + 1));
105 const char *filename,
106 unsigned long pdp_step,
115 char dummychar1[2], dummychar2[2];
116 unsigned short token_idx, error_flag, period = 0;
117 unsigned long hashed_name;
122 if ((rrd.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
123 rrd_set_error("allocating rrd.stat_head");
129 if ((rrd.live_head = calloc(1, sizeof(live_head_t))) == NULL) {
130 rrd_set_error("allocating rrd.live_head");
136 /* set some defaults */
137 strcpy(rrd.stat_head->cookie, RRD_COOKIE);
138 strcpy(rrd.stat_head->version, RRD_VERSION3); /* by default we are still version 3 */
139 rrd.stat_head->float_cookie = FLOAT_COOKIE;
140 rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
141 rrd.stat_head->rra_cnt = 0; /* ditto */
142 rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
144 /* a default value */
148 rrd.live_head->last_up = last_up;
150 /* optind points to the first non-option command line arg,
151 * in this case, the file name. */
152 /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
154 hashed_name = FnvHash(filename);
155 for (i = 0; i < argc; i++) {
158 if (strncmp(argv[i], "DS:", 3) == 0) {
159 size_t old_size = sizeof(ds_def_t) * (rrd.stat_head->ds_cnt);
161 if ((rrd.ds_def = rrd_realloc(rrd.ds_def,
162 old_size + sizeof(ds_def_t))) ==
164 rrd_set_error("allocating rrd.ds_def");
169 memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
170 /* extract the name and type */
171 switch (sscanf(&argv[i][3],
172 DS_NAM_FMT "%1[:]" DST_FMT "%1[:]%n",
173 rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
175 rrd.ds_def[rrd.stat_head->ds_cnt].dst,
176 dummychar2, &offset)) {
179 rrd_set_error("Invalid DS name");
183 rrd_set_error("Invalid DS type");
185 case 4: /* (%n may or may not be counted) */
186 case 5: /* check for duplicate datasource names */
187 for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++)
188 if (strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
189 rrd.ds_def[ii].ds_nam) == 0)
190 rrd_set_error("Duplicate DS name: %s",
191 rrd.ds_def[ii].ds_nam);
192 /* DS_type may be valid or not. Checked later */
195 rrd_set_error("invalid DS format");
197 if (rrd_test_error()) {
203 /* parse the remainder of the arguments */
204 switch (dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst)) {
209 parseGENERIC_DS(&argv[i][offset + 3], &rrd,
210 rrd.stat_head->ds_cnt);
213 parseCDEF_DS(&argv[i][offset + 3], &rrd,
214 rrd.stat_head->ds_cnt);
217 rrd_set_error("invalid DS type specified");
221 if (rrd_test_error()) {
226 rrd.stat_head->ds_cnt++;
227 } else if (strncmp(argv[i], "RRA:", 4) == 0) {
230 size_t old_size = sizeof(rra_def_t) * (rrd.stat_head->rra_cnt);
232 if ((rrd.rra_def = rrd_realloc(rrd.rra_def,
233 old_size + sizeof(rra_def_t))) ==
235 rrd_set_error("allocating rrd.rra_def");
240 memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0,
243 argvcopy = strdup(argv[i]);
244 token = strtok_r(&argvcopy[4], ":", &tokptr);
245 token_idx = error_flag = 0;
246 while (token != NULL) {
249 if (sscanf(token, CF_NAM_FMT,
250 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) !=
252 rrd_set_error("Failed to parse CF name");
254 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
256 strcpy(rrd.stat_head->version, RRD_VERSION); /* MHWPREDICT causes Version 4 */
258 /* initialize some parameters */
259 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
261 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
263 rrd.rra_def[rrd.stat_head->rra_cnt].
264 par[RRA_dependent_rra_idx].u_cnt =
265 rrd.stat_head->rra_cnt;
269 /* initialize some parameters */
270 rrd.rra_def[rrd.stat_head->rra_cnt].
271 par[RRA_seasonal_gamma].u_val = 0.1;
272 rrd.rra_def[rrd.stat_head->rra_cnt].
273 par[RRA_seasonal_smoothing_window].u_val = 0.05;
276 rrd.rra_def[rrd.stat_head->rra_cnt].
277 par[RRA_dependent_rra_idx].u_cnt = -1;
280 rrd.rra_def[rrd.stat_head->rra_cnt].
281 par[RRA_delta_pos].u_val = 2.0;
282 rrd.rra_def[rrd.stat_head->rra_cnt].
283 par[RRA_delta_neg].u_val = 2.0;
284 rrd.rra_def[rrd.stat_head->rra_cnt].
285 par[RRA_window_len].u_cnt = 3;
286 rrd.rra_def[rrd.stat_head->rra_cnt].
287 par[RRA_failure_threshold].u_cnt = 2;
288 rrd.rra_def[rrd.stat_head->rra_cnt].
289 par[RRA_dependent_rra_idx].u_cnt = -1;
291 /* invalid consolidation function */
294 ("Unrecognized consolidation function %s",
295 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
299 /* default: 1 pdp per cdp */
300 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
304 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
311 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt =
315 rrd.rra_def[rrd.stat_head->rra_cnt].
316 par[RRA_cdp_xff_val].u_val = atof(token);
317 if (rrd.rra_def[rrd.stat_head->rra_cnt].
318 par[RRA_cdp_xff_val].u_val < 0.0
319 || rrd.rra_def[rrd.stat_head->rra_cnt].
320 par[RRA_cdp_xff_val].u_val >= 1.0)
322 ("Invalid xff: must be between 0 and 1");
328 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
331 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
333 if (atof(token) <= 0.0 || atof(token) >= 1.0)
335 ("Invalid alpha: must be between 0 and 1");
339 rrd.rra_def[rrd.stat_head->rra_cnt].
340 par[RRA_seasonal_gamma].u_val = atof(token);
341 if (atof(token) <= 0.0 || atof(token) >= 1.0)
343 ("Invalid gamma: must be between 0 and 1");
344 rrd.rra_def[rrd.stat_head->rra_cnt].
345 par[RRA_seasonal_smooth_idx].u_cnt =
347 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
350 /* specifies the # of violations that constitutes the failure threshold */
351 rrd.rra_def[rrd.stat_head->rra_cnt].
352 par[RRA_failure_threshold].u_cnt = atoi(token);
354 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
356 ("Failure threshold is out of range %d, %d",
357 1, MAX_FAILURES_WINDOW_LEN);
360 /* specifies the index (1-based) of CF_DEVSEASONAL array
361 * associated with this CF_DEVPREDICT array. */
362 rrd.rra_def[rrd.stat_head->rra_cnt].
363 par[RRA_dependent_rra_idx].u_cnt =
367 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt =
374 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
377 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
379 if (atof(token) < 0.0 || atof(token) > 1.0)
381 ("Invalid beta: must be between 0 and 1");
385 /* specifies the index (1-based) of CF_HWPREDICT array
386 * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
388 rrd.rra_def[rrd.stat_head->rra_cnt].
389 par[RRA_dependent_rra_idx].u_cnt =
393 /* specifies the window length */
394 rrd.rra_def[rrd.stat_head->rra_cnt].
395 par[RRA_window_len].u_cnt = atoi(token);
397 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
399 ("Window length is out of range %d, %d", 1,
400 MAX_FAILURES_WINDOW_LEN);
401 /* verify that window length exceeds the failure threshold */
402 if (rrd.rra_def[rrd.stat_head->rra_cnt].
403 par[RRA_window_len].u_cnt <
404 rrd.rra_def[rrd.stat_head->rra_cnt].
405 par[RRA_failure_threshold].u_cnt)
407 ("Window length is shorter than the failure threshold");
410 /* shouldn't be any more arguments */
412 ("Unexpected extra argument for consolidation function DEVPREDICT");
415 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt =
422 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
424 /* specifies the index (1-based) of CF_DEVSEASONAL array
425 * associated with this CF_DEVFAILURES array. */
426 rrd.rra_def[rrd.stat_head->rra_cnt].
427 par[RRA_dependent_rra_idx].u_cnt =
432 /* optional smoothing window */
433 if (sscanf(token, "smoothing-window=%lf",
434 &(rrd.rra_def[rrd.stat_head->rra_cnt].
435 par[RRA_seasonal_smoothing_window].
437 strcpy(rrd.stat_head->version, RRD_VERSION); /* smoothing-window causes Version 4 */
438 if (rrd.rra_def[rrd.stat_head->rra_cnt].
439 par[RRA_seasonal_smoothing_window].u_val < 0.0
440 || rrd.rra_def[rrd.stat_head->rra_cnt].
441 par[RRA_seasonal_smoothing_window].u_val >
444 ("Invalid smoothing-window %f: must be between 0 and 1",
445 rrd.rra_def[rrd.stat_head->rra_cnt].
446 par[RRA_seasonal_smoothing_window].
450 rrd_set_error("Invalid option %s", token);
455 /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
456 period = atoi(token);
458 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
460 ("Length of seasonal cycle exceeds length of HW prediction array");
463 /* shouldn't be any more arguments */
465 ("Unexpected extra argument for consolidation function %s",
466 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
471 /* If we are here, this must be a CF_HWPREDICT RRA.
472 * Specifies the index (1-based) of CF_SEASONAL array
473 * associated with this CF_HWPREDICT array. If this argument
474 * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
476 * arrays are created automatically. */
477 rrd.rra_def[rrd.stat_head->rra_cnt].
478 par[RRA_dependent_rra_idx].u_cnt = atoi(token) - 1;
481 /* should never get here */
482 rrd_set_error("Unknown error");
485 if (rrd_test_error()) {
486 /* all errors are unrecoverable */
492 token = strtok_r(NULL, ":", &tokptr);
498 "Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
499 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
500 rrd.rra_def[rrd.stat_head->rra_cnt].
501 par[RRA_dependent_rra_idx].u_cnt, rrd.stat_head->rra_cnt);
503 /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
504 if ((cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
506 || cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
508 && rrd.rra_def[rrd.stat_head->rra_cnt].
509 par[RRA_dependent_rra_idx].u_cnt == rrd.stat_head->rra_cnt) {
511 fprintf(stderr, "Creating HW contingent RRAs\n");
513 if (create_hw_contingent_rras(&rrd, period, hashed_name) ==
515 rrd_set_error("creating contingent RRA");
521 rrd.stat_head->rra_cnt++;
523 rrd_set_error("can't parse argument '%s'", argv[i]);
531 if (rrd.stat_head->rra_cnt < 1) {
532 rrd_set_error("you must define at least one Round Robin Archive");
538 if (rrd.stat_head->ds_cnt < 1) {
539 rrd_set_error("you must define at least one Data Source");
544 return rrd_create_fn(filename, &rrd);
547 void parseGENERIC_DS(
552 char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
558 temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
559 &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
562 old_locale = setlocale(LC_NUMERIC, "C");
563 if (sscanf(def, "%lu:%18[^:]:%18[^:]",
564 &(rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
565 minstr, maxstr) == 3) {
566 if (minstr[0] == 'U' && minstr[1] == 0)
567 rrd->ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
569 rrd->ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
571 if (maxstr[0] == 'U' && maxstr[1] == 0)
572 rrd->ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
574 rrd->ds_def[ds_idx].par[DS_max_val].u_val = atof(maxstr);
576 if (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
577 !isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
578 rrd->ds_def[ds_idx].par[DS_min_val].u_val
579 >= rrd->ds_def[ds_idx].par[DS_max_val].u_val) {
580 rrd_set_error("min must be less than max in DS definition");
581 setlocale(LC_NUMERIC, old_locale);
585 rrd_set_error("failed to parse data source %s", def);
587 setlocale(LC_NUMERIC, old_locale);
590 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
591 * associated with a CF_HWPREDICT RRA. */
592 int create_hw_contingent_rras(
594 unsigned short period,
595 unsigned long hashed_name)
598 rra_def_t *current_rra;
600 /* save index to CF_HWPREDICT */
601 unsigned long hw_index = rrd->stat_head->rra_cnt;
603 /* advance the pointer */
604 (rrd->stat_head->rra_cnt)++;
605 /* allocate the memory for the 4 contingent RRAs */
606 old_size = sizeof(rra_def_t) * (rrd->stat_head->rra_cnt);
607 if ((rrd->rra_def = rrd_realloc(rrd->rra_def,
608 old_size + 4 * sizeof(rra_def_t))) ==
610 rrd_set_error("allocating rrd.rra_def");
614 memset(&(rrd->rra_def[rrd->stat_head->rra_cnt]), 0,
615 4 * sizeof(rra_def_t));
617 /* create the CF_SEASONAL RRA */
618 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
619 strcpy(current_rra->cf_nam, "SEASONAL");
620 current_rra->row_cnt = period;
621 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
622 current_rra->pdp_cnt = 1;
623 current_rra->par[RRA_seasonal_gamma].u_val =
624 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
625 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
626 rrd->rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt =
627 rrd->stat_head->rra_cnt;
629 /* create the CF_DEVSEASONAL RRA */
630 (rrd->stat_head->rra_cnt)++;
631 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
632 strcpy(current_rra->cf_nam, "DEVSEASONAL");
633 current_rra->row_cnt = period;
634 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
635 current_rra->pdp_cnt = 1;
636 current_rra->par[RRA_seasonal_gamma].u_val =
637 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
638 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
640 /* create the CF_DEVPREDICT RRA */
641 (rrd->stat_head->rra_cnt)++;
642 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
643 strcpy(current_rra->cf_nam, "DEVPREDICT");
644 current_rra->row_cnt = (rrd->rra_def[hw_index]).row_cnt;
645 current_rra->pdp_cnt = 1;
646 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
648 /* create the CF_FAILURES RRA */
649 (rrd->stat_head->rra_cnt)++;
650 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
651 strcpy(current_rra->cf_nam, "FAILURES");
652 current_rra->row_cnt = period;
653 current_rra->pdp_cnt = 1;
654 current_rra->par[RRA_delta_pos].u_val = 2.0;
655 current_rra->par[RRA_delta_neg].u_val = 2.0;
656 current_rra->par[RRA_failure_threshold].u_cnt = 7;
657 current_rra->par[RRA_window_len].u_cnt = 9;
658 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
662 /* create and empty rrd file according to the specs given */
665 const char *file_name,
670 rrd_value_t *unknown;
672 rrd_file_t *rrd_file_dn;
675 if ((rrd_file = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
676 rrd_set_error("creating '%s': %s", file_name, rrd_strerror(errno));
677 free(rrd->stat_head);
678 free(rrd->live_head);
682 write(rrd_file, rrd->stat_head, sizeof(stat_head_t));
684 write(rrd_file, rrd->ds_def, sizeof(ds_def_t) * rrd->stat_head->ds_cnt);
686 write(rrd_file, rrd->rra_def,
687 sizeof(rra_def_t) * rrd->stat_head->rra_cnt);
689 write(rrd_file, rrd->live_head, sizeof(live_head_t));
691 if ((rrd->pdp_prep = calloc(1, sizeof(pdp_prep_t))) == NULL) {
692 rrd_set_error("allocating pdp_prep");
693 free(rrd->stat_head);
694 free(rrd->live_head);
699 strcpy(rrd->pdp_prep->last_ds, "UNKN");
701 rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
702 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
703 rrd->live_head->last_up % rrd->stat_head->pdp_step;
705 for (i = 0; i < rrd->stat_head->ds_cnt; i++)
706 write(rrd_file, rrd->pdp_prep, sizeof(pdp_prep_t));
708 if ((rrd->cdp_prep = calloc(1, sizeof(cdp_prep_t))) == NULL) {
709 rrd_set_error("allocating cdp_prep");
710 free(rrd->stat_head);
711 free(rrd->live_head);
717 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
718 switch (cf_conv(rrd->rra_def[i].cf_nam)) {
721 init_hwpredict_cdp(rrd->cdp_prep);
725 init_seasonal_cdp(rrd->cdp_prep);
728 /* initialize violation history to 0 */
729 for (ii = 0; ii < MAX_CDP_PAR_EN; ii++) {
730 /* We can zero everything out, by setting u_val to the
731 * NULL address. Each array entry in scratch is 8 bytes
732 * (a double), but u_cnt only accessed 4 bytes (long) */
733 rrd->cdp_prep->scratch[ii].u_val = 0.0;
737 /* can not be zero because we don't know anything ... */
738 rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
739 /* startup missing pdp count */
740 rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
741 ((rrd->live_head->last_up -
742 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
743 % (rrd->stat_head->pdp_step
744 * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
748 for (ii = 0; ii < rrd->stat_head->ds_cnt; ii++) {
749 write(rrd_file, rrd->cdp_prep, sizeof(cdp_prep_t));
753 /* now, we must make sure that the rest of the rrd
754 struct is properly initialized */
756 if ((rrd->rra_ptr = calloc(1, sizeof(rra_ptr_t))) == NULL) {
757 rrd_set_error("allocating rra_ptr");
758 free(rrd->stat_head);
759 free(rrd->live_head);
764 /* changed this initialization to be consistent with
765 * rrd_restore. With the old value (0), the first update
766 * would occur for cur_row = 1 because rrd_update increments
767 * the pointer a priori. */
768 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
769 rrd->rra_ptr->cur_row = rrd->rra_def[i].row_cnt - 1;
770 write(rrd_file, rrd->rra_ptr, sizeof(rra_ptr_t));
773 /* write the empty data area */
774 if ((unknown = (rrd_value_t *) malloc(512 * sizeof(rrd_value_t))) == NULL) {
775 rrd_set_error("allocating unknown");
776 free(rrd->stat_head);
777 free(rrd->live_head);
781 for (i = 0; i < 512; ++i)
785 for (i = 0; i < rrd->stat_head->rra_cnt; i++)
786 unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
788 while (unkn_cnt > 0) {
789 write(rrd_file, unknown, sizeof(rrd_value_t) * min(unkn_cnt, 512));
795 free(rrd->stat_head);
796 free(rrd->live_head);
797 if (close(rrd_file) == -1) {
798 rrd_set_error("creating rrd: %s", rrd_strerror(errno));
801 /* flush all we don't need out of the cache */
802 rrd_file_dn = rrd_open(file_name, &rrd_dn, RRD_READONLY);
803 rrd_dontneed(rrd_file_dn, &rrd_dn);
805 rrd_close(rrd_file_dn);