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-rw-r--r--database/rrddim.c474
1 files changed, 312 insertions, 162 deletions
diff --git a/database/rrddim.c b/database/rrddim.c
index e488d8b0b..90165a253 100644
--- a/database/rrddim.c
+++ b/database/rrddim.c
@@ -73,6 +73,7 @@ inline int rrddim_set_algorithm(RRDSET *st, RRDDIM *rd, RRD_ALGORITHM algorithm)
rd->exposed = 0;
rrdset_flag_set(st, RRDSET_FLAG_HOMOGENEOUS_CHECK);
rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ rrdcontext_updated_rrddim_algorithm(rd);
return 1;
}
@@ -85,6 +86,7 @@ inline int rrddim_set_multiplier(RRDSET *st, RRDDIM *rd, collected_number multip
rd->exposed = 0;
rrdset_flag_set(st, RRDSET_FLAG_HOMOGENEOUS_CHECK);
rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ rrdcontext_updated_rrddim_multiplier(rd);
return 1;
}
@@ -97,6 +99,7 @@ inline int rrddim_set_divisor(RRDSET *st, RRDDIM *rd, collected_number divisor)
rd->exposed = 0;
rrdset_flag_set(st, RRDSET_FLAG_HOMOGENEOUS_CHECK);
rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
+ rrdcontext_updated_rrddim_divisor(rd);
return 1;
}
@@ -139,12 +142,12 @@ void rrdcalc_link_to_rrddim(RRDDIM *rd, RRDSET *st, RRDHOST *host) {
// 0 : Dimension is live
// last collected time : Dimension is not live
-#if defined(ENABLE_ACLK) && defined(ENABLE_NEW_CLOUD_PROTOCOL)
+#ifdef ENABLE_ACLK
time_t calc_dimension_liveness(RRDDIM *rd, time_t now)
{
time_t last_updated = rd->last_collected_time.tv_sec;
int live;
- if (rd->state->aclk_live_status == 1)
+ if (rd->aclk_live_status == 1)
live =
((now - last_updated) <
MIN(rrdset_free_obsolete_time, RRDSET_MINIMUM_DIM_OFFLINE_MULTIPLIER * rd->update_every));
@@ -168,9 +171,16 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
rc += rrddim_set_algorithm(st, rd, algorithm);
rc += rrddim_set_multiplier(st, rd, multiplier);
rc += rrddim_set_divisor(st, rd, divisor);
+
if (rrddim_flag_check(rd, RRDDIM_FLAG_ARCHIVED)) {
- store_active_dimension(&rd->state->metric_uuid);
- rd->state->collect_ops.init(rd);
+ store_active_dimension(&rd->metric_uuid);
+
+ for(int tier = 0; tier < storage_tiers ;tier++) {
+ if (rd->tiers[tier])
+ rd->tiers[tier]->db_collection_handle =
+ rd->tiers[tier]->collect_ops.init(rd->tiers[tier]->db_metric_handle);
+ }
+
rrddim_flag_clear(rd, RRDDIM_FLAG_ARCHIVED);
rrddimvar_create(rd, RRDVAR_TYPE_CALCULATED, NULL, NULL, &rd->last_stored_value, RRDVAR_OPTION_DEFAULT);
rrddimvar_create(rd, RRDVAR_TYPE_COLLECTED, NULL, "_raw", &rd->last_collected_value, RRDVAR_OPTION_DEFAULT);
@@ -180,129 +190,34 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
rrdset_flag_set(st, RRDSET_FLAG_PENDING_FOREACH_ALARMS);
rrdhost_flag_set(host, RRDHOST_FLAG_PENDING_FOREACH_ALARMS);
}
+
if (unlikely(rc)) {
debug(D_METADATALOG, "DIMENSION [%s] metadata updated", rd->id);
- (void)sql_store_dimension(&rd->state->metric_uuid, rd->rrdset->chart_uuid, rd->id, rd->name, rd->multiplier, rd->divisor,
+ (void)sql_store_dimension(&rd->metric_uuid, rd->rrdset->chart_uuid, rd->id, rd->name, rd->multiplier, rd->divisor,
rd->algorithm);
-#if defined(ENABLE_ACLK) && defined(ENABLE_NEW_CLOUD_PROTOCOL)
+#ifdef ENABLE_ACLK
queue_dimension_to_aclk(rd, calc_dimension_liveness(rd, now_realtime_sec()));
#endif
rrdset_flag_set(st, RRDSET_FLAG_SYNC_CLOCK);
rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
}
rrdset_unlock(st);
+ rrdcontext_updated_rrddim(rd);
return rd;
}
rrdset_flag_set(st, RRDSET_FLAG_SYNC_CLOCK);
rrdset_flag_clear(st, RRDSET_FLAG_UPSTREAM_EXPOSED);
- char filename[FILENAME_MAX + 1];
- char fullfilename[FILENAME_MAX + 1];
-
- unsigned long size = sizeof(RRDDIM) + (st->entries * sizeof(storage_number));
-
- debug(D_RRD_CALLS, "Adding dimension '%s/%s'.", st->id, id);
-
- rrdset_strncpyz_name(filename, id, FILENAME_MAX);
- snprintfz(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename);
-
- if(memory_mode == RRD_MEMORY_MODE_SAVE || memory_mode == RRD_MEMORY_MODE_MAP ||
- memory_mode == RRD_MEMORY_MODE_RAM) {
- rd = (RRDDIM *)netdata_mmap(
- (memory_mode == RRD_MEMORY_MODE_RAM) ? NULL : fullfilename,
- size,
- ((memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE),
- 1);
-
- if(likely(rd)) {
- // we have a file mapped for rd
-
- memset(&rd->avl, 0, sizeof(avl_t));
- rd->id = NULL;
- rd->name = NULL;
- rd->cache_filename = NULL;
- rd->variables = NULL;
- rd->next = NULL;
- rd->rrdset = NULL;
- rd->exposed = 0;
-
- struct timeval now;
- now_realtime_timeval(&now);
-
- if(memory_mode == RRD_MEMORY_MODE_RAM) {
- memset(rd, 0, size);
- }
- else {
- int reset = 0;
-
- if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) {
- info("Initializing file %s.", fullfilename);
- memset(rd, 0, size);
- reset = 1;
- }
- else if(rd->memsize != size) {
- error("File %s does not have the desired size, expected %lu but found %lu. Clearing it.", fullfilename, size, rd->memsize);
- memset(rd, 0, size);
- reset = 1;
- }
- else if(rd->update_every != st->update_every) {
- error("File %s does not have the same update frequency, expected %d but found %d. Clearing it.", fullfilename, st->update_every, rd->update_every);
- memset(rd, 0, size);
- reset = 1;
- }
- else if(dt_usec(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * USEC_PER_SEC)) {
- info("File %s is too old (last collected %llu seconds ago, but the database is %ld seconds). Clearing it.", fullfilename, dt_usec(&now, &rd->last_collected_time) / USEC_PER_SEC, rd->entries * rd->update_every);
- memset(rd, 0, size);
- reset = 1;
- }
-
- if(!reset) {
- if(rd->algorithm != algorithm) {
- info("File %s does not have the expected algorithm (expected %u '%s', found %u '%s'). Previous values may be wrong.",
- fullfilename, algorithm, rrd_algorithm_name(algorithm), rd->algorithm, rrd_algorithm_name(rd->algorithm));
- }
-
- if(rd->multiplier != multiplier) {
- info("File %s does not have the expected multiplier (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, multiplier, rd->multiplier);
- }
-
- if(rd->divisor != divisor) {
- info("File %s does not have the expected divisor (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, divisor, rd->divisor);
- }
- }
- }
-
- // make sure we have the right memory mode
- // even if we cleared the memory
- rd->rrd_memory_mode = memory_mode;
- }
- }
-
- if(unlikely(!rd)) {
- // if we didn't manage to get a mmap'd dimension, just create one
- rd = callocz(1, size);
- if (memory_mode == RRD_MEMORY_MODE_DBENGINE)
- rd->rrd_memory_mode = RRD_MEMORY_MODE_DBENGINE;
- else
- rd->rrd_memory_mode = (memory_mode == RRD_MEMORY_MODE_NONE) ? RRD_MEMORY_MODE_NONE : RRD_MEMORY_MODE_ALLOC;
- }
- rd->memsize = size;
-
- strcpy(rd->magic, RRDDIMENSION_MAGIC);
-
+ rd = callocz(1, sizeof(RRDDIM));
rd->id = strdupz(id);
rd->hash = simple_hash(rd->id);
- rd->cache_filename = strdupz(fullfilename);
-
rd->name = (name && *name)?strdupz(name):strdupz(rd->id);
rd->hash_name = simple_hash(rd->name);
rd->algorithm = algorithm;
-
rd->multiplier = multiplier;
-
rd->divisor = divisor;
if(!rd->divisor) rd->divisor = 1;
@@ -311,40 +226,86 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
if(rrdset_flag_check(st, RRDSET_FLAG_STORE_FIRST))
rd->collections_counter = 1;
- else
- rd->collections_counter = 0;
-
- rd->updated = 0;
- rd->flags = 0x00000000;
-
- rd->calculated_value = 0;
- rd->last_calculated_value = 0;
- rd->collected_value = 0;
- rd->last_collected_value = 0;
- rd->collected_value_max = 0;
- rd->collected_volume = 0;
- rd->stored_volume = 0;
- rd->last_stored_value = 0;
- rd->last_collected_time.tv_sec = 0;
- rd->last_collected_time.tv_usec = 0;
+
rd->rrdset = st;
- rd->state = callocz(1, sizeof(*rd->state));
+
+ if(memory_mode == RRD_MEMORY_MODE_MAP || memory_mode == RRD_MEMORY_MODE_SAVE) {
+ if(!rrddim_memory_load_or_create_map_save(st, rd, memory_mode)) {
+ info("Failed to use memory mode %s for chart '%s', dimension '%s', falling back to ram", (memory_mode == RRD_MEMORY_MODE_MAP)?"map":"save", st->name, rd->name);
+ memory_mode = RRD_MEMORY_MODE_RAM;
+ }
+ }
+
+ if(memory_mode == RRD_MEMORY_MODE_RAM) {
+ size_t entries = st->entries;
+ if(!entries) entries = 5;
+
+ rd->db = netdata_mmap(NULL, entries * sizeof(storage_number), MAP_PRIVATE, 1);
+ if(!rd->db) {
+ info("Failed to use memory mode ram for chart '%s', dimension '%s', falling back to alloc", st->name, rd->name);
+ memory_mode = RRD_MEMORY_MODE_ALLOC;
+ }
+ else rd->memsize = entries * sizeof(storage_number);
+ }
+
+ if(memory_mode == RRD_MEMORY_MODE_ALLOC || memory_mode == RRD_MEMORY_MODE_NONE) {
+ size_t entries = st->entries;
+ if(entries < 5) entries = 5;
+
+ rd->db = callocz(entries, sizeof(storage_number));
+ rd->memsize = entries * sizeof(storage_number);
+ }
+
+ rd->rrd_memory_mode = memory_mode;
+
#ifdef ENABLE_ACLK
- rd->state->aclk_live_status = -1;
+ rd->aclk_live_status = -1;
#endif
- (void) find_dimension_uuid(st, rd, &(rd->state->metric_uuid));
+ (void) find_dimension_uuid(st, rd, &(rd->metric_uuid));
+
+ // initialize the db tiers
+ {
+ size_t initialized = 0;
+ RRD_MEMORY_MODE wanted_mode = memory_mode;
+ for(int tier = 0; tier < storage_tiers ; tier++, wanted_mode = RRD_MEMORY_MODE_DBENGINE) {
+ STORAGE_ENGINE *eng = storage_engine_get(wanted_mode);
+ if(!eng) continue;
+
+ rd->tiers[tier] = callocz(1, sizeof(struct rrddim_tier));
+ rd->tiers[tier]->tier_grouping = get_tier_grouping(tier);
+ rd->tiers[tier]->mode = eng->id;
+ rd->tiers[tier]->collect_ops = eng->api.collect_ops;
+ rd->tiers[tier]->query_ops = eng->api.query_ops;
+ rd->tiers[tier]->db_metric_handle = eng->api.init(rd, host->storage_instance[tier]);
+ storage_point_unset(rd->tiers[tier]->virtual_point);
+ initialized++;
+
+ // internal_error(true, "TIER GROUPING of chart '%s', dimension '%s' for tier %d is set to %d", rd->rrdset->name, rd->name, tier, rd->tiers[tier]->tier_grouping);
+ }
- STORAGE_ENGINE* eng = storage_engine_get(memory_mode);
- rd->state->collect_ops = eng->api.collect_ops;
- rd->state->query_ops = eng->api.query_ops;
+ if(!initialized)
+ error("Failed to initialize all db tiers for chart '%s', dimension '%s", st->name, rd->name);
-#ifdef ENABLE_DBENGINE
- if(memory_mode == RRD_MEMORY_MODE_DBENGINE) {
- rrdeng_metric_init(rd);
+ if(!rd->tiers[0])
+ error("Failed to initialize the first db tier for chart '%s', dimension '%s", st->name, rd->name);
}
-#endif
- store_active_dimension(&rd->state->metric_uuid);
- rd->state->collect_ops.init(rd);
+
+ store_active_dimension(&rd->metric_uuid);
+
+ // initialize data collection for all tiers
+ {
+ size_t initialized = 0;
+ for (int tier = 0; tier < storage_tiers; tier++) {
+ if (rd->tiers[tier]) {
+ rd->tiers[tier]->db_collection_handle = rd->tiers[tier]->collect_ops.init(rd->tiers[tier]->db_metric_handle);
+ initialized++;
+ }
+ }
+
+ if(!initialized)
+ error("Failed to initialize data collection for all db tiers for chart '%s', dimension '%s", st->name, rd->name);
+ }
+
// append this dimension
if(!st->dimensions)
st->dimensions = rd;
@@ -387,6 +348,7 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
ml_new_dimension(rd);
rrdset_unlock(st);
+ rrdcontext_updated_rrddim(rd);
return(rd);
}
@@ -395,15 +357,28 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
void rrddim_free(RRDSET *st, RRDDIM *rd)
{
+ rrdcontext_removed_rrddim(rd);
ml_delete_dimension(rd);
debug(D_RRD_CALLS, "rrddim_free() %s.%s", st->name, rd->name);
if (!rrddim_flag_check(rd, RRDDIM_FLAG_ARCHIVED)) {
- uint8_t can_delete_metric = rd->state->collect_ops.finalize(rd);
- if (can_delete_metric && rd->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
+
+ size_t tiers_available = 0, tiers_said_yes = 0;
+ for(int tier = 0; tier < storage_tiers ;tier++) {
+ if(rd->tiers[tier]) {
+ tiers_available++;
+
+ if(rd->tiers[tier]->collect_ops.finalize(rd->tiers[tier]->db_collection_handle))
+ tiers_said_yes++;
+
+ rd->tiers[tier]->db_collection_handle = NULL;
+ }
+ }
+
+ if (tiers_available == tiers_said_yes && tiers_said_yes && rd->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
/* This metric has no data and no references */
- delete_dimension_uuid(&rd->state->metric_uuid);
+ delete_dimension_uuid(&rd->metric_uuid);
}
}
@@ -427,35 +402,35 @@ void rrddim_free(RRDSET *st, RRDDIM *rd)
error("RRDDIM: INTERNAL ERROR: attempt to remove from index dimension '%s' on chart '%s', removed a different dimension.", rd->id, st->id);
// free(rd->annotations);
-//#if defined(ENABLE_ACLK) && defined(ENABLE_NEW_CLOUD_PROTOCOL)
+//#ifdef ENABLE_ACLK
// if (!netdata_exit)
// aclk_send_dimension_update(rd);
//#endif
- RRD_MEMORY_MODE rrd_memory_mode = rd->rrd_memory_mode;
- switch(rrd_memory_mode) {
- case RRD_MEMORY_MODE_SAVE:
- case RRD_MEMORY_MODE_MAP:
- case RRD_MEMORY_MODE_RAM:
- debug(D_RRD_CALLS, "Unmapping dimension '%s'.", rd->name);
- freez((void *)rd->id);
- freez((void *)rd->name);
- freez(rd->cache_filename);
- freez(rd->state);
- munmap(rd, rd->memsize);
- break;
-
- case RRD_MEMORY_MODE_ALLOC:
- case RRD_MEMORY_MODE_NONE:
- case RRD_MEMORY_MODE_DBENGINE:
- debug(D_RRD_CALLS, "Removing dimension '%s'.", rd->name);
- freez((void *)rd->id);
- freez((void *)rd->name);
- freez(rd->cache_filename);
- freez(rd->state);
- freez(rd);
- break;
+ // this will free MEMORY_MODE_SAVE and MEMORY_MODE_MAP structures
+ rrddim_memory_file_free(rd);
+
+ for(int tier = 0; tier < storage_tiers ;tier++) {
+ if(!rd->tiers[tier]) continue;
+
+ STORAGE_ENGINE* eng = storage_engine_get(rd->tiers[tier]->mode);
+ if(eng)
+ eng->api.free(rd->tiers[tier]->db_metric_handle);
+
+ freez(rd->tiers[tier]);
+ rd->tiers[tier] = NULL;
+ }
+
+ if(rd->db) {
+ if(rd->rrd_memory_mode == RRD_MEMORY_MODE_RAM)
+ munmap(rd->db, rd->memsize);
+ else
+ freez(rd->db);
}
+
+ freez((void *)rd->id);
+ freez((void *)rd->name);
+ freez(rd);
}
@@ -473,10 +448,11 @@ int rrddim_hide(RRDSET *st, const char *id) {
return 1;
}
if (!rrddim_flag_check(rd, RRDDIM_FLAG_META_HIDDEN))
- (void)sql_set_dimension_option(&rd->state->metric_uuid, "hidden");
+ (void)sql_set_dimension_option(&rd->metric_uuid, "hidden");
rrddim_flag_set(rd, RRDDIM_FLAG_HIDDEN);
rrddim_flag_set(rd, RRDDIM_FLAG_META_HIDDEN);
+ rrdcontext_updated_rrddim_flags(rd);
return 0;
}
@@ -490,10 +466,11 @@ int rrddim_unhide(RRDSET *st, const char *id) {
return 1;
}
if (rrddim_flag_check(rd, RRDDIM_FLAG_META_HIDDEN))
- (void)sql_set_dimension_option(&rd->state->metric_uuid, NULL);
+ (void)sql_set_dimension_option(&rd->metric_uuid, NULL);
rrddim_flag_clear(rd, RRDDIM_FLAG_HIDDEN);
rrddim_flag_clear(rd, RRDDIM_FLAG_META_HIDDEN);
+ rrdcontext_updated_rrddim_flags(rd);
return 0;
}
@@ -506,12 +483,14 @@ inline void rrddim_is_obsolete(RRDSET *st, RRDDIM *rd) {
}
rrddim_flag_set(rd, RRDDIM_FLAG_OBSOLETE);
rrdset_flag_set(st, RRDSET_FLAG_OBSOLETE_DIMENSIONS);
+ rrdcontext_updated_rrddim_flags(rd);
}
inline void rrddim_isnot_obsolete(RRDSET *st __maybe_unused, RRDDIM *rd) {
debug(D_RRD_CALLS, "rrddim_isnot_obsolete() for chart %s, dimension %s", st->name, rd->name);
rrddim_flag_clear(rd, RRDDIM_FLAG_OBSOLETE);
+ rrdcontext_updated_rrddim_flags(rd);
}
// ----------------------------------------------------------------------------
@@ -520,6 +499,8 @@ inline void rrddim_isnot_obsolete(RRDSET *st __maybe_unused, RRDDIM *rd) {
inline collected_number rrddim_set_by_pointer(RRDSET *st __maybe_unused, RRDDIM *rd, collected_number value) {
debug(D_RRD_CALLS, "rrddim_set_by_pointer() for chart %s, dimension %s, value " COLLECTED_NUMBER_FORMAT, st->name, rd->name, value);
+ rrdcontext_collected_rrddim(rd);
+
now_realtime_timeval(&rd->last_collected_time);
rd->collected_value = value;
rd->updated = 1;
@@ -529,7 +510,7 @@ inline collected_number rrddim_set_by_pointer(RRDSET *st __maybe_unused, RRDDIM
collected_number v = (value >= 0) ? value : -value;
if(unlikely(v > rd->collected_value_max)) rd->collected_value_max = v;
- // fprintf(stderr, "%s.%s %llu " COLLECTED_NUMBER_FORMAT " dt %0.6f" " rate " CALCULATED_NUMBER_FORMAT "\n", st->name, rd->name, st->usec_since_last_update, value, (float)((double)st->usec_since_last_update / (double)1000000), (calculated_number)((value - rd->last_collected_value) * (calculated_number)rd->multiplier / (calculated_number)rd->divisor * 1000000.0 / (calculated_number)st->usec_since_last_update));
+ // fprintf(stderr, "%s.%s %llu " COLLECTED_NUMBER_FORMAT " dt %0.6f" " rate " NETDATA_DOUBLE_FORMAT "\n", st->name, rd->name, st->usec_since_last_update, value, (float)((double)st->usec_since_last_update / (double)1000000), (NETDATA_DOUBLE)((value - rd->last_collected_value) * (NETDATA_DOUBLE)rd->multiplier / (NETDATA_DOUBLE)rd->divisor * 1000000.0 / (NETDATA_DOUBLE)st->usec_since_last_update));
return rd->last_collected_value;
}
@@ -544,3 +525,172 @@ collected_number rrddim_set(RRDSET *st, const char *id, collected_number value)
return rrddim_set_by_pointer(st, rd, value);
}
+
+
+// ----------------------------------------------------------------------------
+// compatibility layer for RRDDIM files v019
+
+#define RRDDIMENSION_MAGIC_V019 "NETDATA RRD DIMENSION FILE V019"
+
+struct avl_element_v019 {
+ void *avl_link[2];
+ signed char avl_balance;
+};
+
+struct rrddim_map_save_v019 {
+ struct avl_element_v019 avl; // ignored
+ void *id; // ignored
+ void *name; // ignored
+ uint32_t algorithm; // print warning on mismatch - update on load
+ uint32_t rrd_memory_mode; // ignored
+ long long multiplier; // print warning on mismatch - update on load
+ long long divisor; // print warning on mismatch - update on load
+ uint32_t flags; // ignored
+ uint32_t hash; // ignored
+ uint32_t hash_name; // ignored
+ void *cache_filename; // ignored - we use it to keep the filename to save back
+ size_t collections_counter; // ignored
+ void *state; // ignored
+ size_t unused[8]; // ignored
+ long long collected_value_max; // ignored
+ unsigned int updated:1; // ignored
+ unsigned int exposed:1; // ignored
+ struct timeval last_collected_time; // check to reset all - ignored after load
+ long double calculated_value; // ignored
+ long double last_calculated_value; // ignored
+ long double last_stored_value; // ignored
+ long long collected_value; // ignored
+ long long last_collected_value; // ignored
+ long double collected_volume; // ignored
+ long double stored_volume; // ignored
+ void *next; // ignored
+ void *rrdset; // ignored
+ long entries; // check to reset all - update on load
+ int update_every; // check to reset all - update on load
+ size_t memsize; // check to reset all - update on load
+ char magic[sizeof(RRDDIMENSION_MAGIC_V019) + 1];// check to reset all - update on load
+ void *variables; // ignored
+ storage_number values[]; // the array of values
+};
+
+size_t rrddim_memory_file_header_size(void) {
+ return sizeof(struct rrddim_map_save_v019);
+}
+
+void rrddim_memory_file_update(RRDDIM *rd) {
+ if(!rd->rd_on_file) return;
+ struct rrddim_map_save_v019 *rd_on_file = rd->rd_on_file;
+
+ rd_on_file->last_collected_time.tv_sec = rd->last_collected_time.tv_sec;
+ rd_on_file->last_collected_time.tv_usec = rd->last_collected_time.tv_usec;
+}
+
+void rrddim_memory_file_free(RRDDIM *rd) {
+ if(!rd->rd_on_file) return;
+
+ // needed for memory mode map, to save the latest state
+ rrddim_memory_file_update(rd);
+
+ struct rrddim_map_save_v019 *rd_on_file = rd->rd_on_file;
+ freez(rd_on_file->cache_filename);
+ munmap(rd_on_file, rd_on_file->memsize);
+
+ // remove the pointers from the RRDDIM
+ rd->rd_on_file = NULL;
+ rd->db = NULL;
+}
+
+const char *rrddim_cache_filename(RRDDIM *rd) {
+ if(!rd->rd_on_file) return NULL;
+ struct rrddim_map_save_v019 *rd_on_file = rd->rd_on_file;
+ return rd_on_file->cache_filename;
+}
+
+void rrddim_memory_file_save(RRDDIM *rd) {
+ if(!rd->rd_on_file) return;
+
+ rrddim_memory_file_update(rd);
+
+ struct rrddim_map_save_v019 *rd_on_file = rd->rd_on_file;
+ if(rd_on_file->rrd_memory_mode != RRD_MEMORY_MODE_SAVE) return;
+
+ memory_file_save(rd_on_file->cache_filename, rd_on_file, rd_on_file->memsize);
+}
+
+bool rrddim_memory_load_or_create_map_save(RRDSET *st, RRDDIM *rd, RRD_MEMORY_MODE memory_mode) {
+ if(memory_mode != RRD_MEMORY_MODE_SAVE && memory_mode != RRD_MEMORY_MODE_MAP)
+ return false;
+
+ struct rrddim_map_save_v019 *rd_on_file = NULL;
+
+ unsigned long size = sizeof(struct rrddim_map_save_v019) + (st->entries * sizeof(storage_number));
+
+ char filename[FILENAME_MAX + 1];
+ char fullfilename[FILENAME_MAX + 1];
+ rrdset_strncpyz_name(filename, rd->id, FILENAME_MAX);
+ snprintfz(fullfilename, FILENAME_MAX, "%s/%s.db", st->cache_dir, filename);
+
+ rd_on_file = (struct rrddim_map_save_v019 *)netdata_mmap(fullfilename, size,
+ ((memory_mode == RRD_MEMORY_MODE_MAP) ? MAP_SHARED : MAP_PRIVATE), 1);
+
+ if(unlikely(!rd_on_file)) return false;
+
+ struct timeval now;
+ now_realtime_timeval(&now);
+
+ int reset = 0;
+ rd_on_file->magic[sizeof(RRDDIMENSION_MAGIC_V019)] = '\0';
+ if(strcmp(rd_on_file->magic, RRDDIMENSION_MAGIC_V019) != 0) {
+ info("Initializing file %s.", fullfilename);
+ memset(rd_on_file, 0, size);
+ reset = 1;
+ }
+ else if(rd_on_file->memsize != size) {
+ error("File %s does not have the desired size, expected %lu but found %lu. Clearing it.", fullfilename, size, rd_on_file->memsize);
+ memset(rd_on_file, 0, size);
+ reset = 1;
+ }
+ else if(rd_on_file->update_every != st->update_every) {
+ error("File %s does not have the same update frequency, expected %d but found %d. Clearing it.", fullfilename, st->update_every, rd_on_file->update_every);
+ memset(rd_on_file, 0, size);
+ reset = 1;
+ }
+ else if(dt_usec(&now, &rd_on_file->last_collected_time) > (rd_on_file->entries * rd_on_file->update_every * USEC_PER_SEC)) {
+ info("File %s is too old (last collected %llu seconds ago, but the database is %ld seconds). Clearing it.", fullfilename, dt_usec(&now, &rd_on_file->last_collected_time) / USEC_PER_SEC, rd_on_file->entries * rd_on_file->update_every);
+ memset(rd_on_file, 0, size);
+ reset = 1;
+ }
+
+ if(!reset) {
+ if(rd_on_file->algorithm != rd->algorithm)
+ info("File %s does not have the expected algorithm (expected %u '%s', found %u '%s'). Previous values may be wrong.",
+ fullfilename, rd->algorithm, rrd_algorithm_name(rd->algorithm), rd_on_file->algorithm, rrd_algorithm_name(rd_on_file->algorithm));
+
+ if(rd_on_file->multiplier != rd->multiplier)
+ info("File %s does not have the expected multiplier (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, rd->multiplier, rd_on_file->multiplier);
+
+ if(rd_on_file->divisor != rd->divisor)
+ info("File %s does not have the expected divisor (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, rd->divisor, rd_on_file->divisor);
+ }
+
+ // zero the entire header
+ memset(rd_on_file, 0, sizeof(struct rrddim_map_save_v019));
+
+ // set the important fields
+ strcpy(rd_on_file->magic, RRDDIMENSION_MAGIC_V019);
+ rd_on_file->algorithm = rd->algorithm;
+ rd_on_file->multiplier = rd->multiplier;
+ rd_on_file->divisor = rd->divisor;
+ rd_on_file->entries = st->entries;
+ rd_on_file->update_every = rd->update_every;
+ rd_on_file->memsize = size;
+ rd_on_file->rrd_memory_mode = memory_mode;
+ rd_on_file->cache_filename = strdupz(fullfilename);
+
+ rd->db = &rd_on_file->values[0];
+ rd->rd_on_file = rd_on_file;
+ rd->memsize = size;
+ rrddim_memory_file_update(rd);
+
+ return true;
+}