1 /*****************************************************************************
2 * RRDtool 1.3.2 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(
30 static void rrd_free2(
31 rrd_t *rrd); /* our onwn copy, immmune to mmap */
37 struct option long_options[] = {
38 {"start", required_argument, 0, 'b'},
39 {"step", required_argument, 0, 's'},
44 time_t last_up = time(NULL) - 10;
45 unsigned long pdp_step = 300;
46 rrd_time_value_t last_up_tv;
47 char *parsetime_error = NULL;
52 opterr = 0; /* initialize getopt */
55 opt = getopt_long(argc, argv, "b:s:", long_options, &option_index);
62 if ((parsetime_error = rrd_parsetime(optarg, &last_up_tv))) {
63 rrd_set_error("start time: %s", parsetime_error);
66 if (last_up_tv.type == RELATIVE_TO_END_TIME ||
67 last_up_tv.type == RELATIVE_TO_START_TIME) {
68 rrd_set_error("specifying time relative to the 'start' "
69 "or 'end' makes no sense here");
73 last_up = mktime(&last_up_tv.tm) +last_up_tv.offset;
75 if (last_up < 3600 * 24 * 365 * 10) {
77 ("the first entry to the RRD should be after 1980");
83 long_tmp = atol(optarg);
85 rrd_set_error("step size should be no less than one second");
93 rrd_set_error("unknown option '%c'", optopt);
95 rrd_set_error("unknown option '%s'", argv[optind - 1]);
100 rrd_set_error("need name of an rrd file to create");
103 rc = rrd_create_r(argv[optind],
105 argc - optind - 1, (const char **) (argv + optind + 1));
112 const char *filename,
113 unsigned long pdp_step,
122 char dummychar1[2], dummychar2[2];
123 unsigned short token_idx, error_flag, period = 0;
124 unsigned long hashed_name;
129 if ((rrd.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
130 rrd_set_error("allocating rrd.stat_head");
136 if ((rrd.live_head = calloc(1, sizeof(live_head_t))) == NULL) {
137 rrd_set_error("allocating rrd.live_head");
142 /* set some defaults */
143 strcpy(rrd.stat_head->cookie, RRD_COOKIE);
144 strcpy(rrd.stat_head->version, RRD_VERSION3); /* by default we are still version 3 */
145 rrd.stat_head->float_cookie = FLOAT_COOKIE;
146 rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
147 rrd.stat_head->rra_cnt = 0; /* ditto */
148 rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
150 /* a default value */
154 rrd.live_head->last_up = last_up;
156 /* optind points to the first non-option command line arg,
157 * in this case, the file name. */
158 /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
160 hashed_name = FnvHash(filename);
161 for (i = 0; i < argc; i++) {
164 if (strncmp(argv[i], "DS:", 3) == 0) {
165 size_t old_size = sizeof(ds_def_t) * (rrd.stat_head->ds_cnt);
167 if ((rrd.ds_def = rrd_realloc(rrd.ds_def,
168 old_size + sizeof(ds_def_t))) ==
170 rrd_set_error("allocating rrd.ds_def");
174 memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
175 /* extract the name and type */
176 switch (sscanf(&argv[i][3],
177 DS_NAM_FMT "%1[:]" DST_FMT "%1[:]%n",
178 rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
180 rrd.ds_def[rrd.stat_head->ds_cnt].dst,
181 dummychar2, &offset)) {
184 rrd_set_error("Invalid DS name");
188 rrd_set_error("Invalid DS type");
190 case 4: /* (%n may or may not be counted) */
191 case 5: /* check for duplicate datasource names */
192 for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++)
193 if (strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
194 rrd.ds_def[ii].ds_nam) == 0)
195 rrd_set_error("Duplicate DS name: %s",
196 rrd.ds_def[ii].ds_nam);
197 /* DS_type may be valid or not. Checked later */
200 rrd_set_error("invalid DS format");
202 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()) {
229 rrd.stat_head->ds_cnt++;
230 } else if (strncmp(argv[i], "RRA:", 4) == 0) {
233 size_t old_size = sizeof(rra_def_t) * (rrd.stat_head->rra_cnt);
236 if ((rrd.rra_def = rrd_realloc(rrd.rra_def,
237 old_size + sizeof(rra_def_t))) ==
239 rrd_set_error("allocating rrd.rra_def");
243 memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0,
246 argvcopy = strdup(argv[i]);
247 token = strtok_r(&argvcopy[4], ":", &tokptr);
248 token_idx = error_flag = 0;
249 while (token != NULL) {
252 if (sscanf(token, CF_NAM_FMT,
253 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) !=
255 rrd_set_error("Failed to parse CF name");
257 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
259 strcpy(rrd.stat_head->version, RRD_VERSION); /* MHWPREDICT causes Version 4 */
261 /* initialize some parameters */
262 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
264 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
266 rrd.rra_def[rrd.stat_head->rra_cnt].
267 par[RRA_dependent_rra_idx].u_cnt =
268 rrd.stat_head->rra_cnt;
272 /* initialize some parameters */
273 rrd.rra_def[rrd.stat_head->rra_cnt].
274 par[RRA_seasonal_gamma].u_val = 0.1;
275 rrd.rra_def[rrd.stat_head->rra_cnt].
276 par[RRA_seasonal_smoothing_window].u_val = 0.05;
279 rrd.rra_def[rrd.stat_head->rra_cnt].
280 par[RRA_dependent_rra_idx].u_cnt = -1;
283 rrd.rra_def[rrd.stat_head->rra_cnt].
284 par[RRA_delta_pos].u_val = 2.0;
285 rrd.rra_def[rrd.stat_head->rra_cnt].
286 par[RRA_delta_neg].u_val = 2.0;
287 rrd.rra_def[rrd.stat_head->rra_cnt].
288 par[RRA_window_len].u_cnt = 3;
289 rrd.rra_def[rrd.stat_head->rra_cnt].
290 par[RRA_failure_threshold].u_cnt = 2;
291 rrd.rra_def[rrd.stat_head->rra_cnt].
292 par[RRA_dependent_rra_idx].u_cnt = -1;
294 /* invalid consolidation function */
297 ("Unrecognized consolidation function %s",
298 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
302 /* default: 1 pdp per cdp */
303 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
307 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
314 row_cnt = atoi(token);
316 rrd_set_error("Invalid row count: %i", row_cnt);
317 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
320 rrd.rra_def[rrd.stat_head->rra_cnt].
321 par[RRA_cdp_xff_val].u_val = atof(token);
322 if (rrd.rra_def[rrd.stat_head->rra_cnt].
323 par[RRA_cdp_xff_val].u_val < 0.0
324 || rrd.rra_def[rrd.stat_head->rra_cnt].
325 par[RRA_cdp_xff_val].u_val >= 1.0)
327 ("Invalid xff: must be between 0 and 1");
333 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
336 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
338 if (atof(token) <= 0.0 || atof(token) >= 1.0)
340 ("Invalid alpha: must be between 0 and 1");
344 rrd.rra_def[rrd.stat_head->rra_cnt].
345 par[RRA_seasonal_gamma].u_val = atof(token);
346 if (atof(token) <= 0.0 || atof(token) >= 1.0)
348 ("Invalid gamma: must be between 0 and 1");
349 rrd.rra_def[rrd.stat_head->rra_cnt].
350 par[RRA_seasonal_smooth_idx].u_cnt =
352 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
355 /* specifies the # of violations that constitutes the failure threshold */
356 rrd.rra_def[rrd.stat_head->rra_cnt].
357 par[RRA_failure_threshold].u_cnt = atoi(token);
359 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
361 ("Failure threshold is out of range %d, %d",
362 1, MAX_FAILURES_WINDOW_LEN);
365 /* specifies the index (1-based) of CF_DEVSEASONAL array
366 * associated with this CF_DEVPREDICT array. */
367 rrd.rra_def[rrd.stat_head->rra_cnt].
368 par[RRA_dependent_rra_idx].u_cnt =
372 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt =
375 rrd_set_error("Invalid step: must be >= 1");
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 */
500 token = strtok_r(NULL, ":", &tokptr);
506 "Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
507 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 /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
512 if ((cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
514 || cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
516 && rrd.rra_def[rrd.stat_head->rra_cnt].
517 par[RRA_dependent_rra_idx].u_cnt == rrd.stat_head->rra_cnt) {
519 fprintf(stderr, "Creating HW contingent RRAs\n");
521 if (create_hw_contingent_rras(&rrd, period, hashed_name) ==
523 rrd_set_error("creating contingent RRA");
528 rrd.stat_head->rra_cnt++;
530 rrd_set_error("can't parse argument '%s'", argv[i]);
537 if (rrd.stat_head->rra_cnt < 1) {
538 rrd_set_error("you must define at least one Round Robin Archive");
543 if (rrd.stat_head->ds_cnt < 1) {
544 rrd_set_error("you must define at least one Data Source");
548 return rrd_create_fn(filename, &rrd);
551 void parseGENERIC_DS(
556 char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
562 temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
563 &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
566 old_locale = setlocale(LC_NUMERIC, "C");
567 if (sscanf(def, "%lu:%18[^:]:%18[^:]",
568 &(rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
569 minstr, maxstr) == 3) {
570 if (minstr[0] == 'U' && minstr[1] == 0)
571 rrd->ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
573 rrd->ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
575 if (maxstr[0] == 'U' && maxstr[1] == 0)
576 rrd->ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
578 rrd->ds_def[ds_idx].par[DS_max_val].u_val = atof(maxstr);
580 if (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
581 !isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
582 rrd->ds_def[ds_idx].par[DS_min_val].u_val
583 >= rrd->ds_def[ds_idx].par[DS_max_val].u_val) {
584 rrd_set_error("min must be less than max in DS definition");
585 setlocale(LC_NUMERIC, old_locale);
589 rrd_set_error("failed to parse data source %s", def);
591 setlocale(LC_NUMERIC, old_locale);
594 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
595 * associated with a CF_HWPREDICT RRA. */
596 int create_hw_contingent_rras(
598 unsigned short period,
599 unsigned long hashed_name)
602 rra_def_t *current_rra;
604 /* save index to CF_HWPREDICT */
605 unsigned long hw_index = rrd->stat_head->rra_cnt;
607 /* advance the pointer */
608 (rrd->stat_head->rra_cnt)++;
609 /* allocate the memory for the 4 contingent RRAs */
610 old_size = sizeof(rra_def_t) * (rrd->stat_head->rra_cnt);
611 if ((rrd->rra_def = rrd_realloc(rrd->rra_def,
612 old_size + 4 * sizeof(rra_def_t))) ==
615 rrd_set_error("allocating rrd.rra_def");
619 memset(&(rrd->rra_def[rrd->stat_head->rra_cnt]), 0,
620 4 * sizeof(rra_def_t));
622 /* create the CF_SEASONAL RRA */
623 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
624 strcpy(current_rra->cf_nam, "SEASONAL");
625 current_rra->row_cnt = period;
626 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
627 current_rra->pdp_cnt = 1;
628 current_rra->par[RRA_seasonal_gamma].u_val =
629 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
630 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
631 rrd->rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt =
632 rrd->stat_head->rra_cnt;
634 /* create the CF_DEVSEASONAL RRA */
635 (rrd->stat_head->rra_cnt)++;
636 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
637 strcpy(current_rra->cf_nam, "DEVSEASONAL");
638 current_rra->row_cnt = period;
639 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
640 current_rra->pdp_cnt = 1;
641 current_rra->par[RRA_seasonal_gamma].u_val =
642 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
643 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
645 /* create the CF_DEVPREDICT RRA */
646 (rrd->stat_head->rra_cnt)++;
647 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
648 strcpy(current_rra->cf_nam, "DEVPREDICT");
649 current_rra->row_cnt = (rrd->rra_def[hw_index]).row_cnt;
650 current_rra->pdp_cnt = 1;
651 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
653 /* create the CF_FAILURES RRA */
654 (rrd->stat_head->rra_cnt)++;
655 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
656 strcpy(current_rra->cf_nam, "FAILURES");
657 current_rra->row_cnt = period;
658 current_rra->pdp_cnt = 1;
659 current_rra->par[RRA_delta_pos].u_val = 2.0;
660 current_rra->par[RRA_delta_neg].u_val = 2.0;
661 current_rra->par[RRA_failure_threshold].u_cnt = 7;
662 current_rra->par[RRA_window_len].u_cnt = 9;
663 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
667 /* create and empty rrd file according to the specs given */
670 const char *file_name,
675 rrd_value_t *unknown;
677 rrd_file_t *rrd_file_dn;
679 unsigned flags = O_WRONLY | O_CREAT | O_TRUNC;
681 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
685 if ((rrd_file = open(file_name, flags, 0666)) < 0) {
686 rrd_set_error("creating '%s': %s", file_name, rrd_strerror(errno));
691 write(rrd_file, rrd->stat_head, sizeof(stat_head_t));
693 write(rrd_file, rrd->ds_def, sizeof(ds_def_t) * rrd->stat_head->ds_cnt);
695 write(rrd_file, rrd->rra_def,
696 sizeof(rra_def_t) * rrd->stat_head->rra_cnt);
698 write(rrd_file, rrd->live_head, sizeof(live_head_t));
700 if ((rrd->pdp_prep = calloc(1, sizeof(pdp_prep_t))) == NULL) {
701 rrd_set_error("allocating pdp_prep");
707 strcpy(rrd->pdp_prep->last_ds, "U");
709 rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
710 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
711 rrd->live_head->last_up % rrd->stat_head->pdp_step;
713 for (i = 0; i < rrd->stat_head->ds_cnt; i++)
714 write(rrd_file, rrd->pdp_prep, sizeof(pdp_prep_t));
716 if ((rrd->cdp_prep = calloc(1, sizeof(cdp_prep_t))) == NULL) {
717 rrd_set_error("allocating cdp_prep");
724 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
725 switch (cf_conv(rrd->rra_def[i].cf_nam)) {
728 init_hwpredict_cdp(rrd->cdp_prep);
732 init_seasonal_cdp(rrd->cdp_prep);
735 /* initialize violation history to 0 */
736 for (ii = 0; ii < MAX_CDP_PAR_EN; ii++) {
737 /* We can zero everything out, by setting u_val to the
738 * NULL address. Each array entry in scratch is 8 bytes
739 * (a double), but u_cnt only accessed 4 bytes (long) */
740 rrd->cdp_prep->scratch[ii].u_val = 0.0;
744 /* can not be zero because we don't know anything ... */
745 rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
746 /* startup missing pdp count */
747 rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
748 ((rrd->live_head->last_up -
749 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
750 % (rrd->stat_head->pdp_step
751 * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
755 for (ii = 0; ii < rrd->stat_head->ds_cnt; ii++) {
756 write(rrd_file, rrd->cdp_prep, sizeof(cdp_prep_t));
760 /* now, we must make sure that the rest of the rrd
761 struct is properly initialized */
763 if ((rrd->rra_ptr = calloc(1, sizeof(rra_ptr_t))) == NULL) {
764 rrd_set_error("allocating rra_ptr");
770 /* changed this initialization to be consistent with
771 * rrd_restore. With the old value (0), the first update
772 * would occur for cur_row = 1 because rrd_update increments
773 * the pointer a priori. */
774 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
775 rrd->rra_ptr->cur_row = rra_random_row(&rrd->rra_def[i]);
776 write(rrd_file, rrd->rra_ptr, sizeof(rra_ptr_t));
779 /* write the empty data area */
780 if ((unknown = (rrd_value_t *) malloc(512 * sizeof(rrd_value_t))) == NULL) {
781 rrd_set_error("allocating unknown");
786 for (i = 0; i < 512; ++i)
790 for (i = 0; i < rrd->stat_head->rra_cnt; i++)
791 unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
793 while (unkn_cnt > 0) {
794 write(rrd_file, unknown, sizeof(rrd_value_t) * min(unkn_cnt, 512));
801 if (close(rrd_file) == -1) {
802 rrd_set_error("creating rrd: %s", rrd_strerror(errno));
805 /* flush all we don't need out of the cache */
806 rrd_file_dn = rrd_open(file_name, &rrd_dn, RRD_READONLY);
807 rrd_dontneed(rrd_file_dn, &rrd_dn);
809 rrd_close(rrd_file_dn);
814 static void rrd_free2(
817 free(rrd->live_head);
818 free(rrd->stat_head);
824 free(rrd->rrd_value);
827 static int rand_init = 0;
829 long int rra_random_row(
833 srandom((unsigned int) time(NULL) + (unsigned int) getpid());
837 return random() % rra->row_cnt;