1 /*****************************************************************************
2 * RRDtool 1.3rc9 Copyright by Tobi Oetiker, 1997-2008
3 *****************************************************************************
4 * rrd_create.c creates new rrds
5 *****************************************************************************/
12 #include "rrd_rpncalc.h"
15 #include "rrd_is_thread_safe.h"
17 unsigned long FnvHash(
19 int create_hw_contingent_rras(
21 unsigned short period,
22 unsigned long hashed_name);
27 long int rra_random_row(
34 struct option long_options[] = {
35 {"start", required_argument, 0, 'b'},
36 {"step", required_argument, 0, 's'},
41 time_t last_up = time(NULL) - 10;
42 unsigned long pdp_step = 300;
43 rrd_time_value_t last_up_tv;
44 char *parsetime_error = NULL;
49 opterr = 0; /* initialize getopt */
52 opt = getopt_long(argc, argv, "b:s:", long_options, &option_index);
59 if ((parsetime_error = rrd_parsetime(optarg, &last_up_tv))) {
60 rrd_set_error("start time: %s", parsetime_error);
63 if (last_up_tv.type == RELATIVE_TO_END_TIME ||
64 last_up_tv.type == RELATIVE_TO_START_TIME) {
65 rrd_set_error("specifying time relative to the 'start' "
66 "or 'end' makes no sense here");
70 last_up = mktime(&last_up_tv.tm) +last_up_tv.offset;
72 if (last_up < 3600 * 24 * 365 * 10) {
74 ("the first entry to the RRD should be after 1980");
80 long_tmp = atol(optarg);
82 rrd_set_error("step size should be no less than one second");
90 rrd_set_error("unknown option '%c'", optopt);
92 rrd_set_error("unknown option '%s'", argv[optind - 1]);
97 rrd_set_error("need name of an rrd file to create");
100 rc = rrd_create_r(argv[optind],
102 argc - optind - 1, (const char **) (argv + optind + 1));
109 const char *filename,
110 unsigned long pdp_step,
119 char dummychar1[2], dummychar2[2];
120 unsigned short token_idx, error_flag, period = 0;
121 unsigned long hashed_name;
126 if ((rrd.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
127 rrd_set_error("allocating rrd.stat_head");
133 if ((rrd.live_head = calloc(1, sizeof(live_head_t))) == NULL) {
134 rrd_set_error("allocating rrd.live_head");
140 /* set some defaults */
141 strcpy(rrd.stat_head->cookie, RRD_COOKIE);
142 strcpy(rrd.stat_head->version, RRD_VERSION3); /* by default we are still version 3 */
143 rrd.stat_head->float_cookie = FLOAT_COOKIE;
144 rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
145 rrd.stat_head->rra_cnt = 0; /* ditto */
146 rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
148 /* a default value */
152 rrd.live_head->last_up = last_up;
154 /* optind points to the first non-option command line arg,
155 * in this case, the file name. */
156 /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
158 hashed_name = FnvHash(filename);
159 for (i = 0; i < argc; i++) {
162 if (strncmp(argv[i], "DS:", 3) == 0) {
163 size_t old_size = sizeof(ds_def_t) * (rrd.stat_head->ds_cnt);
165 if ((rrd.ds_def = rrd_realloc(rrd.ds_def,
166 old_size + sizeof(ds_def_t))) ==
168 rrd_set_error("allocating rrd.ds_def");
173 memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
174 /* extract the name and type */
175 switch (sscanf(&argv[i][3],
176 DS_NAM_FMT "%1[:]" DST_FMT "%1[:]%n",
177 rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
179 rrd.ds_def[rrd.stat_head->ds_cnt].dst,
180 dummychar2, &offset)) {
183 rrd_set_error("Invalid DS name");
187 rrd_set_error("Invalid DS type");
189 case 4: /* (%n may or may not be counted) */
190 case 5: /* check for duplicate datasource names */
191 for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++)
192 if (strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
193 rrd.ds_def[ii].ds_nam) == 0)
194 rrd_set_error("Duplicate DS name: %s",
195 rrd.ds_def[ii].ds_nam);
196 /* DS_type may be valid or not. Checked later */
199 rrd_set_error("invalid DS format");
201 if (rrd_test_error()) {
207 /* parse the remainder of the arguments */
208 switch (dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst)) {
213 parseGENERIC_DS(&argv[i][offset + 3], &rrd,
214 rrd.stat_head->ds_cnt);
217 parseCDEF_DS(&argv[i][offset + 3], &rrd,
218 rrd.stat_head->ds_cnt);
221 rrd_set_error("invalid DS type specified");
225 if (rrd_test_error()) {
230 rrd.stat_head->ds_cnt++;
231 } else if (strncmp(argv[i], "RRA:", 4) == 0) {
234 size_t old_size = sizeof(rra_def_t) * (rrd.stat_head->rra_cnt);
237 if ((rrd.rra_def = rrd_realloc(rrd.rra_def,
238 old_size + sizeof(rra_def_t))) ==
240 rrd_set_error("allocating rrd.rra_def");
245 memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0,
248 argvcopy = strdup(argv[i]);
249 token = strtok_r(&argvcopy[4], ":", &tokptr);
250 token_idx = error_flag = 0;
251 while (token != NULL) {
254 if (sscanf(token, CF_NAM_FMT,
255 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) !=
257 rrd_set_error("Failed to parse CF name");
259 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
261 strcpy(rrd.stat_head->version, RRD_VERSION); /* MHWPREDICT causes Version 4 */
263 /* initialize some parameters */
264 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
266 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
268 rrd.rra_def[rrd.stat_head->rra_cnt].
269 par[RRA_dependent_rra_idx].u_cnt =
270 rrd.stat_head->rra_cnt;
274 /* initialize some parameters */
275 rrd.rra_def[rrd.stat_head->rra_cnt].
276 par[RRA_seasonal_gamma].u_val = 0.1;
277 rrd.rra_def[rrd.stat_head->rra_cnt].
278 par[RRA_seasonal_smoothing_window].u_val = 0.05;
281 rrd.rra_def[rrd.stat_head->rra_cnt].
282 par[RRA_dependent_rra_idx].u_cnt = -1;
285 rrd.rra_def[rrd.stat_head->rra_cnt].
286 par[RRA_delta_pos].u_val = 2.0;
287 rrd.rra_def[rrd.stat_head->rra_cnt].
288 par[RRA_delta_neg].u_val = 2.0;
289 rrd.rra_def[rrd.stat_head->rra_cnt].
290 par[RRA_window_len].u_cnt = 3;
291 rrd.rra_def[rrd.stat_head->rra_cnt].
292 par[RRA_failure_threshold].u_cnt = 2;
293 rrd.rra_def[rrd.stat_head->rra_cnt].
294 par[RRA_dependent_rra_idx].u_cnt = -1;
296 /* invalid consolidation function */
299 ("Unrecognized consolidation function %s",
300 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
304 /* default: 1 pdp per cdp */
305 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
309 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
316 row_cnt = atoi(token);
318 rrd_set_error("Invalid row count: %i", row_cnt);
319 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
322 rrd.rra_def[rrd.stat_head->rra_cnt].
323 par[RRA_cdp_xff_val].u_val = atof(token);
324 if (rrd.rra_def[rrd.stat_head->rra_cnt].
325 par[RRA_cdp_xff_val].u_val < 0.0
326 || rrd.rra_def[rrd.stat_head->rra_cnt].
327 par[RRA_cdp_xff_val].u_val >= 1.0)
329 ("Invalid xff: must be between 0 and 1");
335 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
338 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
340 if (atof(token) <= 0.0 || atof(token) >= 1.0)
342 ("Invalid alpha: must be between 0 and 1");
346 rrd.rra_def[rrd.stat_head->rra_cnt].
347 par[RRA_seasonal_gamma].u_val = atof(token);
348 if (atof(token) <= 0.0 || atof(token) >= 1.0)
350 ("Invalid gamma: must be between 0 and 1");
351 rrd.rra_def[rrd.stat_head->rra_cnt].
352 par[RRA_seasonal_smooth_idx].u_cnt =
354 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
357 /* specifies the # of violations that constitutes the failure threshold */
358 rrd.rra_def[rrd.stat_head->rra_cnt].
359 par[RRA_failure_threshold].u_cnt = atoi(token);
361 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
363 ("Failure threshold is out of range %d, %d",
364 1, MAX_FAILURES_WINDOW_LEN);
367 /* specifies the index (1-based) of CF_DEVSEASONAL array
368 * associated with this CF_DEVPREDICT array. */
369 rrd.rra_def[rrd.stat_head->rra_cnt].
370 par[RRA_dependent_rra_idx].u_cnt =
374 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt =
381 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
384 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
386 if (atof(token) < 0.0 || atof(token) > 1.0)
388 ("Invalid beta: must be between 0 and 1");
392 /* specifies the index (1-based) of CF_HWPREDICT array
393 * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
395 rrd.rra_def[rrd.stat_head->rra_cnt].
396 par[RRA_dependent_rra_idx].u_cnt =
400 /* specifies the window length */
401 rrd.rra_def[rrd.stat_head->rra_cnt].
402 par[RRA_window_len].u_cnt = atoi(token);
404 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
406 ("Window length is out of range %d, %d", 1,
407 MAX_FAILURES_WINDOW_LEN);
408 /* verify that window length exceeds the failure threshold */
409 if (rrd.rra_def[rrd.stat_head->rra_cnt].
410 par[RRA_window_len].u_cnt <
411 rrd.rra_def[rrd.stat_head->rra_cnt].
412 par[RRA_failure_threshold].u_cnt)
414 ("Window length is shorter than the failure threshold");
417 /* shouldn't be any more arguments */
419 ("Unexpected extra argument for consolidation function DEVPREDICT");
422 row_cnt = atoi(token);
424 rrd_set_error("Invalid row count: %i", row_cnt);
425 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
431 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
433 /* specifies the index (1-based) of CF_DEVSEASONAL array
434 * associated with this CF_DEVFAILURES array. */
435 rrd.rra_def[rrd.stat_head->rra_cnt].
436 par[RRA_dependent_rra_idx].u_cnt =
441 /* optional smoothing window */
442 if (sscanf(token, "smoothing-window=%lf",
443 &(rrd.rra_def[rrd.stat_head->rra_cnt].
444 par[RRA_seasonal_smoothing_window].
446 strcpy(rrd.stat_head->version, RRD_VERSION); /* smoothing-window causes Version 4 */
447 if (rrd.rra_def[rrd.stat_head->rra_cnt].
448 par[RRA_seasonal_smoothing_window].u_val < 0.0
449 || rrd.rra_def[rrd.stat_head->rra_cnt].
450 par[RRA_seasonal_smoothing_window].u_val >
453 ("Invalid smoothing-window %f: must be between 0 and 1",
454 rrd.rra_def[rrd.stat_head->rra_cnt].
455 par[RRA_seasonal_smoothing_window].
459 rrd_set_error("Invalid option %s", token);
464 /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
465 period = atoi(token);
467 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
469 ("Length of seasonal cycle exceeds length of HW prediction array");
472 /* shouldn't be any more arguments */
474 ("Unexpected extra argument for consolidation function %s",
475 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
480 /* If we are here, this must be a CF_HWPREDICT RRA.
481 * Specifies the index (1-based) of CF_SEASONAL array
482 * associated with this CF_HWPREDICT array. If this argument
483 * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
485 * arrays are created automatically. */
486 rrd.rra_def[rrd.stat_head->rra_cnt].
487 par[RRA_dependent_rra_idx].u_cnt = atoi(token) - 1;
490 /* should never get here */
491 rrd_set_error("Unknown error");
494 if (rrd_test_error()) {
495 /* all errors are unrecoverable */
501 token = strtok_r(NULL, ":", &tokptr);
507 "Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
508 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
509 rrd.rra_def[rrd.stat_head->rra_cnt].
510 par[RRA_dependent_rra_idx].u_cnt, rrd.stat_head->rra_cnt);
512 /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
513 if ((cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
515 || cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
517 && rrd.rra_def[rrd.stat_head->rra_cnt].
518 par[RRA_dependent_rra_idx].u_cnt == rrd.stat_head->rra_cnt) {
520 fprintf(stderr, "Creating HW contingent RRAs\n");
522 if (create_hw_contingent_rras(&rrd, period, hashed_name) ==
524 rrd_set_error("creating contingent RRA");
530 rrd.stat_head->rra_cnt++;
532 rrd_set_error("can't parse argument '%s'", argv[i]);
540 if (rrd.stat_head->rra_cnt < 1) {
541 rrd_set_error("you must define at least one Round Robin Archive");
547 if (rrd.stat_head->ds_cnt < 1) {
548 rrd_set_error("you must define at least one Data Source");
553 return rrd_create_fn(filename, &rrd);
556 void parseGENERIC_DS(
561 char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
567 temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
568 &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
571 old_locale = setlocale(LC_NUMERIC, "C");
572 if (sscanf(def, "%lu:%18[^:]:%18[^:]",
573 &(rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
574 minstr, maxstr) == 3) {
575 if (minstr[0] == 'U' && minstr[1] == 0)
576 rrd->ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
578 rrd->ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
580 if (maxstr[0] == 'U' && maxstr[1] == 0)
581 rrd->ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
583 rrd->ds_def[ds_idx].par[DS_max_val].u_val = atof(maxstr);
585 if (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
586 !isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
587 rrd->ds_def[ds_idx].par[DS_min_val].u_val
588 >= rrd->ds_def[ds_idx].par[DS_max_val].u_val) {
589 rrd_set_error("min must be less than max in DS definition");
590 setlocale(LC_NUMERIC, old_locale);
594 rrd_set_error("failed to parse data source %s", def);
596 setlocale(LC_NUMERIC, old_locale);
599 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
600 * associated with a CF_HWPREDICT RRA. */
601 int create_hw_contingent_rras(
603 unsigned short period,
604 unsigned long hashed_name)
607 rra_def_t *current_rra;
609 /* save index to CF_HWPREDICT */
610 unsigned long hw_index = rrd->stat_head->rra_cnt;
612 /* advance the pointer */
613 (rrd->stat_head->rra_cnt)++;
614 /* allocate the memory for the 4 contingent RRAs */
615 old_size = sizeof(rra_def_t) * (rrd->stat_head->rra_cnt);
616 if ((rrd->rra_def = rrd_realloc(rrd->rra_def,
617 old_size + 4 * sizeof(rra_def_t))) ==
619 rrd_set_error("allocating rrd.rra_def");
623 memset(&(rrd->rra_def[rrd->stat_head->rra_cnt]), 0,
624 4 * sizeof(rra_def_t));
626 /* create the CF_SEASONAL RRA */
627 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
628 strcpy(current_rra->cf_nam, "SEASONAL");
629 current_rra->row_cnt = period;
630 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
631 current_rra->pdp_cnt = 1;
632 current_rra->par[RRA_seasonal_gamma].u_val =
633 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
634 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
635 rrd->rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt =
636 rrd->stat_head->rra_cnt;
638 /* create the CF_DEVSEASONAL RRA */
639 (rrd->stat_head->rra_cnt)++;
640 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
641 strcpy(current_rra->cf_nam, "DEVSEASONAL");
642 current_rra->row_cnt = period;
643 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
644 current_rra->pdp_cnt = 1;
645 current_rra->par[RRA_seasonal_gamma].u_val =
646 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
647 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
649 /* create the CF_DEVPREDICT RRA */
650 (rrd->stat_head->rra_cnt)++;
651 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
652 strcpy(current_rra->cf_nam, "DEVPREDICT");
653 current_rra->row_cnt = (rrd->rra_def[hw_index]).row_cnt;
654 current_rra->pdp_cnt = 1;
655 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
657 /* create the CF_FAILURES RRA */
658 (rrd->stat_head->rra_cnt)++;
659 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
660 strcpy(current_rra->cf_nam, "FAILURES");
661 current_rra->row_cnt = period;
662 current_rra->pdp_cnt = 1;
663 current_rra->par[RRA_delta_pos].u_val = 2.0;
664 current_rra->par[RRA_delta_neg].u_val = 2.0;
665 current_rra->par[RRA_failure_threshold].u_cnt = 7;
666 current_rra->par[RRA_window_len].u_cnt = 9;
667 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
671 /* create and empty rrd file according to the specs given */
674 const char *file_name,
679 rrd_value_t *unknown;
681 rrd_file_t *rrd_file_dn;
683 unsigned flags = O_WRONLY | O_CREAT | O_TRUNC;
684 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
688 if ((rrd_file = open(file_name, flags, 0666)) < 0) {
689 rrd_set_error("creating '%s': %s", file_name, rrd_strerror(errno));
690 free(rrd->stat_head);
691 free(rrd->live_head);
695 write(rrd_file, rrd->stat_head, sizeof(stat_head_t));
697 write(rrd_file, rrd->ds_def, sizeof(ds_def_t) * rrd->stat_head->ds_cnt);
699 write(rrd_file, rrd->rra_def,
700 sizeof(rra_def_t) * rrd->stat_head->rra_cnt);
702 write(rrd_file, rrd->live_head, sizeof(live_head_t));
704 if ((rrd->pdp_prep = calloc(1, sizeof(pdp_prep_t))) == NULL) {
705 rrd_set_error("allocating pdp_prep");
706 free(rrd->stat_head);
707 free(rrd->live_head);
712 strcpy(rrd->pdp_prep->last_ds, "U");
714 rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
715 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
716 rrd->live_head->last_up % rrd->stat_head->pdp_step;
718 for (i = 0; i < rrd->stat_head->ds_cnt; i++)
719 write(rrd_file, rrd->pdp_prep, sizeof(pdp_prep_t));
721 if ((rrd->cdp_prep = calloc(1, sizeof(cdp_prep_t))) == NULL) {
722 rrd_set_error("allocating cdp_prep");
723 free(rrd->stat_head);
724 free(rrd->live_head);
730 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
731 switch (cf_conv(rrd->rra_def[i].cf_nam)) {
734 init_hwpredict_cdp(rrd->cdp_prep);
738 init_seasonal_cdp(rrd->cdp_prep);
741 /* initialize violation history to 0 */
742 for (ii = 0; ii < MAX_CDP_PAR_EN; ii++) {
743 /* We can zero everything out, by setting u_val to the
744 * NULL address. Each array entry in scratch is 8 bytes
745 * (a double), but u_cnt only accessed 4 bytes (long) */
746 rrd->cdp_prep->scratch[ii].u_val = 0.0;
750 /* can not be zero because we don't know anything ... */
751 rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
752 /* startup missing pdp count */
753 rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
754 ((rrd->live_head->last_up -
755 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
756 % (rrd->stat_head->pdp_step
757 * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
761 for (ii = 0; ii < rrd->stat_head->ds_cnt; ii++) {
762 write(rrd_file, rrd->cdp_prep, sizeof(cdp_prep_t));
766 /* now, we must make sure that the rest of the rrd
767 struct is properly initialized */
769 if ((rrd->rra_ptr = calloc(1, sizeof(rra_ptr_t))) == NULL) {
770 rrd_set_error("allocating rra_ptr");
771 free(rrd->stat_head);
772 free(rrd->live_head);
777 /* changed this initialization to be consistent with
778 * rrd_restore. With the old value (0), the first update
779 * would occur for cur_row = 1 because rrd_update increments
780 * the pointer a priori. */
781 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
782 rrd->rra_ptr->cur_row = rra_random_row(&rrd->rra_def[i]);
783 write(rrd_file, rrd->rra_ptr, sizeof(rra_ptr_t));
786 /* write the empty data area */
787 if ((unknown = (rrd_value_t *) malloc(512 * sizeof(rrd_value_t))) == NULL) {
788 rrd_set_error("allocating unknown");
789 free(rrd->stat_head);
790 free(rrd->live_head);
794 for (i = 0; i < 512; ++i)
798 for (i = 0; i < rrd->stat_head->rra_cnt; i++)
799 unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
801 while (unkn_cnt > 0) {
802 write(rrd_file, unknown, sizeof(rrd_value_t) * min(unkn_cnt, 512));
808 free(rrd->stat_head);
809 free(rrd->live_head);
810 if (close(rrd_file) == -1) {
811 rrd_set_error("creating rrd: %s", rrd_strerror(errno));
814 /* flush all we don't need out of the cache */
815 rrd_file_dn = rrd_open(file_name, &rrd_dn, RRD_READONLY);
816 rrd_dontneed(rrd_file_dn, &rrd_dn);
818 rrd_close(rrd_file_dn);
822 static int rand_init = 0;
824 long int rra_random_row(
828 srandom((unsigned int) time(NULL) + (unsigned int) getpid());
832 return random() % rra->row_cnt;