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-rw-r--r--src/database/ram/README.md11
-rw-r--r--src/database/ram/rrddim_mem.c437
-rw-r--r--src/database/ram/rrddim_mem.h54
3 files changed, 502 insertions, 0 deletions
diff --git a/src/database/ram/README.md b/src/database/ram/README.md
new file mode 100644
index 000000000..6ece6d0f4
--- /dev/null
+++ b/src/database/ram/README.md
@@ -0,0 +1,11 @@
+<!--
+title: "RAM database modes"
+description: "Netdata's RAM database modes."
+custom_edit_url: https://github.com/netdata/netdata/edit/master/src/database/ram/README.md
+sidebar_label: "RAM database modes"
+learn_status: "Published"
+learn_topic_type: "References"
+learn_rel_path: "Developers/Database"
+-->
+
+# RAM database modes
diff --git a/src/database/ram/rrddim_mem.c b/src/database/ram/rrddim_mem.c
new file mode 100644
index 000000000..718dd357c
--- /dev/null
+++ b/src/database/ram/rrddim_mem.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rrddim_mem.h"
+#include "Judy.h"
+
+static Pvoid_t rrddim_JudyHS_array = NULL;
+static netdata_rwlock_t rrddim_JudyHS_rwlock = NETDATA_RWLOCK_INITIALIZER;
+
+// ----------------------------------------------------------------------------
+// metrics groups
+
+STORAGE_METRICS_GROUP *rrddim_metrics_group_get(STORAGE_INSTANCE *si __maybe_unused, uuid_t *uuid __maybe_unused) {
+ return NULL;
+}
+
+void rrddim_metrics_group_release(STORAGE_INSTANCE *si __maybe_unused, STORAGE_METRICS_GROUP *smg __maybe_unused) {
+ // if(!smg) return; // smg may be NULL
+ ;
+}
+
+// ----------------------------------------------------------------------------
+// RRDDIM legacy data collection functions
+
+struct mem_metric_handle {
+ RRDDIM *rd;
+
+ size_t counter;
+ size_t entries;
+ size_t current_entry;
+ time_t last_updated_s;
+ time_t update_every_s;
+
+ int32_t refcount;
+};
+
+static void update_metric_handle_from_rrddim(struct mem_metric_handle *mh, RRDDIM *rd) {
+ mh->counter = rd->rrdset->counter;
+ mh->entries = rd->rrdset->db.entries;
+ mh->current_entry = rd->rrdset->db.current_entry;
+ mh->last_updated_s = rd->rrdset->last_updated.tv_sec;
+ mh->update_every_s = rd->rrdset->update_every;
+}
+
+static void check_metric_handle_from_rrddim(struct mem_metric_handle *mh) {
+ RRDDIM *rd = mh->rd; (void)rd;
+ internal_fatal(mh->entries != (size_t)rd->rrdset->db.entries, "RRDDIM: entries do not match");
+ internal_fatal(mh->update_every_s != rd->rrdset->update_every, "RRDDIM: update every does not match");
+}
+
+STORAGE_METRIC_HANDLE *
+rrddim_metric_get_or_create(RRDDIM *rd, STORAGE_INSTANCE *si __maybe_unused) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)rrddim_metric_get(si, &rd->metric_uuid);
+ while(!mh) {
+ netdata_rwlock_wrlock(&rrddim_JudyHS_rwlock);
+ Pvoid_t *PValue = JudyHSIns(&rrddim_JudyHS_array, &rd->metric_uuid, sizeof(uuid_t), PJE0);
+ mh = *PValue;
+ if(!mh) {
+ mh = callocz(1, sizeof(struct mem_metric_handle));
+ mh->rd = rd;
+ mh->refcount = 1;
+ update_metric_handle_from_rrddim(mh, rd);
+ *PValue = mh;
+ __atomic_add_fetch(&rrddim_db_memory_size, sizeof(struct mem_metric_handle) + JUDYHS_INDEX_SIZE_ESTIMATE(sizeof(uuid_t)), __ATOMIC_RELAXED);
+ }
+ else {
+ if(__atomic_add_fetch(&mh->refcount, 1, __ATOMIC_RELAXED) <= 0)
+ mh = NULL;
+ }
+ netdata_rwlock_unlock(&rrddim_JudyHS_rwlock);
+ }
+
+ internal_fatal(mh->rd != rd, "RRDDIM_MEM: incorrect pointer returned from index.");
+
+ return (STORAGE_METRIC_HANDLE *)mh;
+}
+
+STORAGE_METRIC_HANDLE *
+rrddim_metric_get(STORAGE_INSTANCE *si __maybe_unused, uuid_t *uuid) {
+ struct mem_metric_handle *mh = NULL;
+ netdata_rwlock_rdlock(&rrddim_JudyHS_rwlock);
+ Pvoid_t *PValue = JudyHSGet(rrddim_JudyHS_array, uuid, sizeof(uuid_t));
+ if (likely(NULL != PValue)) {
+ mh = *PValue;
+ if(__atomic_add_fetch(&mh->refcount, 1, __ATOMIC_RELAXED) <= 0)
+ mh = NULL;
+ }
+ netdata_rwlock_unlock(&rrddim_JudyHS_rwlock);
+
+ return (STORAGE_METRIC_HANDLE *)mh;
+}
+
+STORAGE_METRIC_HANDLE *rrddim_metric_dup(STORAGE_METRIC_HANDLE *smh) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ __atomic_add_fetch(&mh->refcount, 1, __ATOMIC_RELAXED);
+ return smh;
+}
+
+void rrddim_metric_release(STORAGE_METRIC_HANDLE *smh __maybe_unused) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+
+ if(__atomic_sub_fetch(&mh->refcount, 1, __ATOMIC_RELAXED) == 0) {
+ // we are the last one holding this
+
+ int32_t expected = 0;
+ if(__atomic_compare_exchange_n(&mh->refcount, &expected, -99999, false, __ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
+ // we can delete it
+
+ RRDDIM *rd = mh->rd;
+ netdata_rwlock_wrlock(&rrddim_JudyHS_rwlock);
+ JudyHSDel(&rrddim_JudyHS_array, &rd->metric_uuid, sizeof(uuid_t), PJE0);
+ netdata_rwlock_unlock(&rrddim_JudyHS_rwlock);
+
+ freez(mh);
+ __atomic_sub_fetch(&rrddim_db_memory_size, sizeof(struct mem_metric_handle) + JUDYHS_INDEX_SIZE_ESTIMATE(sizeof(uuid_t)), __ATOMIC_RELAXED);
+ }
+ }
+}
+
+bool rrddim_metric_retention_by_uuid(STORAGE_INSTANCE *si __maybe_unused, uuid_t *uuid, time_t *first_entry_s, time_t *last_entry_s) {
+ STORAGE_METRIC_HANDLE *smh = rrddim_metric_get(si, uuid);
+ if(!smh)
+ return false;
+
+ *first_entry_s = rrddim_query_oldest_time_s(smh);
+ *last_entry_s = rrddim_query_latest_time_s(smh);
+
+ return true;
+}
+
+void rrddim_store_metric_change_collection_frequency(STORAGE_COLLECT_HANDLE *sch, int update_every) {
+ struct mem_collect_handle *ch = (struct mem_collect_handle *)sch;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)ch->smh;
+
+ rrddim_store_metric_flush(sch);
+ mh->update_every_s = update_every;
+}
+
+STORAGE_COLLECT_HANDLE *rrddim_collect_init(STORAGE_METRIC_HANDLE *smh, uint32_t update_every __maybe_unused, STORAGE_METRICS_GROUP *smg __maybe_unused) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ RRDDIM *rd = mh->rd;
+
+ update_metric_handle_from_rrddim(mh, rd);
+ internal_fatal((uint32_t)mh->update_every_s != update_every, "RRDDIM: update requested does not match the dimension");
+
+ struct mem_collect_handle *ch = callocz(1, sizeof(struct mem_collect_handle));
+ ch->common.seb = STORAGE_ENGINE_BACKEND_RRDDIM;
+ ch->rd = rd;
+ ch->smh = smh;
+
+ __atomic_add_fetch(&rrddim_db_memory_size, sizeof(struct mem_collect_handle), __ATOMIC_RELAXED);
+
+ return (STORAGE_COLLECT_HANDLE *)ch;
+}
+
+void rrddim_store_metric_flush(STORAGE_COLLECT_HANDLE *sch) {
+ struct mem_collect_handle *ch = (struct mem_collect_handle *)sch;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)ch->smh;
+
+ RRDDIM *rd = mh->rd;
+ size_t entries = mh->entries;
+ storage_number empty = pack_storage_number(NAN, SN_FLAG_NONE);
+
+ for(size_t i = 0; i < entries ;i++)
+ rd->db.data[i] = empty;
+
+ mh->counter = 0;
+ mh->last_updated_s = 0;
+ mh->current_entry = 0;
+}
+
+static inline void rrddim_fill_the_gap(STORAGE_COLLECT_HANDLE *sch, time_t now_collect_s) {
+ struct mem_collect_handle *ch = (struct mem_collect_handle *)sch;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)ch->smh;
+
+ RRDDIM *rd = mh->rd;
+
+ internal_fatal(ch->rd != mh->rd, "RRDDIM: dimensions do not match");
+ check_metric_handle_from_rrddim(mh);
+
+ size_t entries = mh->entries;
+ time_t update_every_s = mh->update_every_s;
+ time_t last_stored_s = mh->last_updated_s;
+ size_t gap_entries = (now_collect_s - last_stored_s) / update_every_s;
+ if(gap_entries >= entries)
+ rrddim_store_metric_flush(sch);
+
+ else {
+ storage_number empty = pack_storage_number(NAN, SN_FLAG_NONE);
+ size_t current_entry = mh->current_entry;
+ time_t now_store_s = last_stored_s + update_every_s;
+
+ // fill the dimension
+ size_t c;
+ for(c = 0; c < entries && now_store_s <= now_collect_s ; now_store_s += update_every_s, c++) {
+ rd->db.data[current_entry++] = empty;
+
+ if(unlikely(current_entry >= entries))
+ current_entry = 0;
+ }
+ mh->counter += c;
+ mh->current_entry = current_entry;
+ mh->last_updated_s = now_store_s;
+ }
+}
+
+void rrddim_collect_store_metric(STORAGE_COLLECT_HANDLE *sch,
+ usec_t point_in_time_ut,
+ NETDATA_DOUBLE n,
+ NETDATA_DOUBLE min_value __maybe_unused,
+ NETDATA_DOUBLE max_value __maybe_unused,
+ uint16_t count __maybe_unused,
+ uint16_t anomaly_count __maybe_unused,
+ SN_FLAGS flags)
+{
+ struct mem_collect_handle *ch = (struct mem_collect_handle *)sch;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)ch->smh;
+
+ RRDDIM *rd = ch->rd;
+ time_t point_in_time_s = (time_t)(point_in_time_ut / USEC_PER_SEC);
+
+ internal_fatal(ch->rd != mh->rd, "RRDDIM: dimensions do not match");
+ check_metric_handle_from_rrddim(mh);
+
+ if(unlikely(point_in_time_s <= mh->last_updated_s))
+ return;
+
+ if(unlikely(mh->last_updated_s && point_in_time_s - mh->update_every_s > mh->last_updated_s))
+ rrddim_fill_the_gap(sch, point_in_time_s);
+
+ rd->db.data[mh->current_entry] = pack_storage_number(n, flags);
+ mh->counter++;
+ mh->current_entry = (mh->current_entry + 1) >= mh->entries ? 0 : mh->current_entry + 1;
+ mh->last_updated_s = point_in_time_s;
+}
+
+int rrddim_collect_finalize(STORAGE_COLLECT_HANDLE *sch) {
+ freez(sch);
+ __atomic_sub_fetch(&rrddim_db_memory_size, sizeof(struct mem_collect_handle), __ATOMIC_RELAXED);
+ return 0;
+}
+
+// ----------------------------------------------------------------------------
+
+// get the total duration in seconds of the round-robin database
+#define metric_duration(mh) (( (time_t)(mh)->counter >= (time_t)(mh)->entries ? (time_t)(mh)->entries : (time_t)(mh)->counter ) * (time_t)(mh)->update_every_s)
+
+// get the last slot updated in the round-robin database
+#define rrddim_last_slot(mh) ((size_t)(((mh)->current_entry == 0) ? (mh)->entries - 1 : (mh)->current_entry - 1))
+
+// return the slot that has the oldest value
+#define rrddim_first_slot(mh) ((size_t)((mh)->counter >= (size_t)(mh)->entries ? (mh)->current_entry : 0))
+
+// get the slot of the round-robin database, for the given timestamp (t)
+// it always returns a valid slot, although it may not be for the time requested if the time is outside the round-robin database
+// only valid when not using dbengine
+static inline size_t rrddim_time2slot(STORAGE_METRIC_HANDLE *smh, time_t t) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ RRDDIM *rd = mh->rd;
+
+ size_t ret = 0;
+ time_t last_entry_s = rrddim_query_latest_time_s(smh);
+ time_t first_entry_s = rrddim_query_oldest_time_s(smh);
+ size_t entries = mh->entries;
+ size_t first_slot = rrddim_first_slot(mh);
+ size_t last_slot = rrddim_last_slot(mh);
+ size_t update_every = mh->update_every_s;
+
+ if(t >= last_entry_s) {
+ // the requested time is after the last entry we have
+ ret = last_slot;
+ }
+ else {
+ if(t <= first_entry_s) {
+ // the requested time is before the first entry we have
+ ret = first_slot;
+ }
+ else {
+ if(last_slot >= (size_t)((last_entry_s - t) / update_every))
+ ret = last_slot - ((last_entry_s - t) / update_every);
+ else
+ ret = last_slot - ((last_entry_s - t) / update_every) + entries;
+ }
+ }
+
+ if(unlikely(ret >= entries)) {
+ netdata_log_error("INTERNAL ERROR: rrddim_time2slot() on %s returns values outside entries", rrddim_name(rd));
+ ret = entries - 1;
+ }
+
+ return ret;
+}
+
+// get the timestamp of a specific slot in the round-robin database
+// only valid when not using dbengine
+static inline time_t rrddim_slot2time(STORAGE_METRIC_HANDLE *smh, size_t slot) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ RRDDIM *rd = mh->rd;
+
+ time_t ret;
+ time_t last_entry_s = rrddim_query_latest_time_s(smh);
+ time_t first_entry_s = rrddim_query_oldest_time_s(smh);
+ size_t entries = mh->entries;
+ size_t last_slot = rrddim_last_slot(mh);
+ size_t update_every = mh->update_every_s;
+
+ if(slot >= entries) {
+ netdata_log_error("INTERNAL ERROR: caller of rrddim_slot2time() gives invalid slot %zu", slot);
+ slot = entries - 1;
+ }
+
+ if(slot > last_slot)
+ ret = last_entry_s - (time_t)(update_every * (last_slot - slot + entries));
+ else
+ ret = last_entry_s - (time_t)(update_every * (last_slot - slot));
+
+ if(unlikely(ret < first_entry_s)) {
+ netdata_log_error("INTERNAL ERROR: rrddim_slot2time() on dimension '%s' of chart '%s' returned time (%ld) too far in the past (before first_entry_s %ld) for slot %zu",
+ rrddim_name(rd), rrdset_id(rd->rrdset), ret, first_entry_s, slot);
+
+ ret = first_entry_s;
+ }
+
+ if(unlikely(ret > last_entry_s)) {
+ netdata_log_error("INTERNAL ERROR: rrddim_slot2time() on dimension '%s' of chart '%s' returned time (%ld) too far into the future (after last_entry_s %ld) for slot %zu",
+ rrddim_name(rd), rrdset_id(rd->rrdset), ret, last_entry_s, slot);
+
+ ret = last_entry_s;
+ }
+
+ return ret;
+}
+
+// ----------------------------------------------------------------------------
+// RRDDIM legacy database query functions
+
+void rrddim_query_init(STORAGE_METRIC_HANDLE *smh, struct storage_engine_query_handle *seqh, time_t start_time_s, time_t end_time_s, STORAGE_PRIORITY priority __maybe_unused) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+
+ check_metric_handle_from_rrddim(mh);
+
+ seqh->start_time_s = start_time_s;
+ seqh->end_time_s = end_time_s;
+ seqh->priority = priority;
+ seqh->seb = STORAGE_ENGINE_BACKEND_RRDDIM;
+ struct mem_query_handle* h = mallocz(sizeof(struct mem_query_handle));
+ h->smh = smh;
+
+ h->slot = rrddim_time2slot(smh, start_time_s);
+ h->last_slot = rrddim_time2slot(smh, end_time_s);
+ h->dt = mh->update_every_s;
+
+ h->next_timestamp = start_time_s;
+ h->slot_timestamp = rrddim_slot2time(smh, h->slot);
+ h->last_timestamp = rrddim_slot2time(smh, h->last_slot);
+
+ // netdata_log_info("RRDDIM QUERY INIT: start %ld, end %ld, next %ld, first %ld, last %ld, dt %ld", start_time, end_time, h->next_timestamp, h->slot_timestamp, h->last_timestamp, h->dt);
+
+ __atomic_add_fetch(&rrddim_db_memory_size, sizeof(struct mem_query_handle), __ATOMIC_RELAXED);
+ seqh->handle = (STORAGE_QUERY_HANDLE *)h;
+}
+
+// Returns the metric and sets its timestamp into current_time
+// IT IS REQUIRED TO **ALWAYS** SET ALL RETURN VALUES (current_time, end_time, flags)
+// IT IS REQUIRED TO **ALWAYS** KEEP TRACK OF TIME, EVEN OUTSIDE THE DATABASE BOUNDARIES
+STORAGE_POINT rrddim_query_next_metric(struct storage_engine_query_handle *seqh) {
+ struct mem_query_handle* h = (struct mem_query_handle*)seqh->handle;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)h->smh;
+ RRDDIM *rd = mh->rd;
+
+ size_t entries = mh->entries;
+ size_t slot = h->slot;
+
+ STORAGE_POINT sp;
+ sp.count = 1;
+
+ time_t this_timestamp = h->next_timestamp;
+ h->next_timestamp += h->dt;
+
+ // set this timestamp for our caller
+ sp.start_time_s = this_timestamp - h->dt;
+ sp.end_time_s = this_timestamp;
+
+ if(unlikely(this_timestamp < h->slot_timestamp)) {
+ storage_point_empty(sp, sp.start_time_s, sp.end_time_s);
+ return sp;
+ }
+
+ if(unlikely(this_timestamp > h->last_timestamp)) {
+ storage_point_empty(sp, sp.start_time_s, sp.end_time_s);
+ return sp;
+ }
+
+ storage_number n = rd->db.data[slot++];
+ if(unlikely(slot >= entries)) slot = 0;
+
+ h->slot = slot;
+ h->slot_timestamp += h->dt;
+
+ sp.anomaly_count = is_storage_number_anomalous(n) ? 1 : 0;
+ sp.flags = (n & SN_USER_FLAGS);
+ sp.min = sp.max = sp.sum = unpack_storage_number(n);
+
+ return sp;
+}
+
+int rrddim_query_is_finished(struct storage_engine_query_handle *seqh) {
+ struct mem_query_handle *h = (struct mem_query_handle*)seqh->handle;
+ return (h->next_timestamp > seqh->end_time_s);
+}
+
+void rrddim_query_finalize(struct storage_engine_query_handle *seqh) {
+#ifdef NETDATA_INTERNAL_CHECKS
+ struct mem_query_handle *h = (struct mem_query_handle*)seqh->handle;
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)h->smh;
+
+ internal_error(!rrddim_query_is_finished(seqh),
+ "QUERY: query for chart '%s' dimension '%s' has been stopped unfinished",
+ rrdset_id(mh->rd->rrdset), rrddim_name(mh->rd));
+
+#endif
+ freez(seqh->handle);
+ __atomic_sub_fetch(&rrddim_db_memory_size, sizeof(struct mem_query_handle), __ATOMIC_RELAXED);
+}
+
+time_t rrddim_query_align_to_optimal_before(struct storage_engine_query_handle *seqh) {
+ return seqh->end_time_s;
+}
+
+time_t rrddim_query_latest_time_s(STORAGE_METRIC_HANDLE *smh) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ return mh->last_updated_s;
+}
+
+time_t rrddim_query_oldest_time_s(STORAGE_METRIC_HANDLE *smh) {
+ struct mem_metric_handle *mh = (struct mem_metric_handle *)smh;
+ return (time_t)(mh->last_updated_s - metric_duration(mh));
+}
diff --git a/src/database/ram/rrddim_mem.h b/src/database/ram/rrddim_mem.h
new file mode 100644
index 000000000..166b8777a
--- /dev/null
+++ b/src/database/ram/rrddim_mem.h
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_RRDDIMMEM_H
+#define NETDATA_RRDDIMMEM_H
+
+#include "database/rrd.h"
+
+struct mem_collect_handle {
+ struct storage_collect_handle common; // has to be first item
+
+ STORAGE_METRIC_HANDLE *smh;
+ RRDDIM *rd;
+};
+
+struct mem_query_handle {
+ STORAGE_METRIC_HANDLE *smh;
+ time_t dt;
+ time_t next_timestamp;
+ time_t last_timestamp;
+ time_t slot_timestamp;
+ size_t slot;
+ size_t last_slot;
+};
+
+STORAGE_METRIC_HANDLE *rrddim_metric_get_or_create(RRDDIM *rd, STORAGE_INSTANCE *si);
+STORAGE_METRIC_HANDLE *rrddim_metric_get(STORAGE_INSTANCE *si, uuid_t *uuid);
+STORAGE_METRIC_HANDLE *rrddim_metric_dup(STORAGE_METRIC_HANDLE *smh);
+void rrddim_metric_release(STORAGE_METRIC_HANDLE *smh);
+
+bool rrddim_metric_retention_by_uuid(STORAGE_INSTANCE *si, uuid_t *uuid, time_t *first_entry_s, time_t *last_entry_s);
+
+STORAGE_METRICS_GROUP *rrddim_metrics_group_get(STORAGE_INSTANCE *si, uuid_t *uuid);
+void rrddim_metrics_group_release(STORAGE_INSTANCE *si, STORAGE_METRICS_GROUP *smg);
+
+STORAGE_COLLECT_HANDLE *rrddim_collect_init(STORAGE_METRIC_HANDLE *smh, uint32_t update_every, STORAGE_METRICS_GROUP *smg);
+void rrddim_store_metric_change_collection_frequency(STORAGE_COLLECT_HANDLE *sch, int update_every);
+void rrddim_collect_store_metric(STORAGE_COLLECT_HANDLE *sch, usec_t point_in_time_ut, NETDATA_DOUBLE n,
+ NETDATA_DOUBLE min_value,
+ NETDATA_DOUBLE max_value,
+ uint16_t count,
+ uint16_t anomaly_count,
+ SN_FLAGS flags);
+void rrddim_store_metric_flush(STORAGE_COLLECT_HANDLE *sch);
+int rrddim_collect_finalize(STORAGE_COLLECT_HANDLE *sch);
+
+void rrddim_query_init(STORAGE_METRIC_HANDLE *smh, struct storage_engine_query_handle *seqh, time_t start_time_s, time_t end_time_s, STORAGE_PRIORITY priority);
+STORAGE_POINT rrddim_query_next_metric(struct storage_engine_query_handle *seqh);
+int rrddim_query_is_finished(struct storage_engine_query_handle *seqh);
+void rrddim_query_finalize(struct storage_engine_query_handle *seqh);
+time_t rrddim_query_latest_time_s(STORAGE_METRIC_HANDLE *smh);
+time_t rrddim_query_oldest_time_s(STORAGE_METRIC_HANDLE *smh);
+time_t rrddim_query_align_to_optimal_before(struct storage_engine_query_handle *seqh);
+
+#endif
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