diff options
Diffstat (limited to 'database/engine/rrdengineapi.c')
| -rwxr-xr-x | database/engine/rrdengineapi.c | 1361 |
1 files changed, 0 insertions, 1361 deletions
diff --git a/database/engine/rrdengineapi.c b/database/engine/rrdengineapi.c deleted file mode 100755 index 1ddce524..00000000 --- a/database/engine/rrdengineapi.c +++ /dev/null @@ -1,1361 +0,0 @@ -// SPDX-License-Identifier: GPL-3.0-or-later - -#include "database/engine/rrddiskprotocol.h" -#include "rrdengine.h" - -/* Default global database instance */ -struct rrdengine_instance multidb_ctx_storage_tier0; -struct rrdengine_instance multidb_ctx_storage_tier1; -struct rrdengine_instance multidb_ctx_storage_tier2; -struct rrdengine_instance multidb_ctx_storage_tier3; -struct rrdengine_instance multidb_ctx_storage_tier4; - -#define mrg_metric_ctx(metric) (struct rrdengine_instance *)mrg_metric_section(main_mrg, metric) - -#if RRD_STORAGE_TIERS != 5 -#error RRD_STORAGE_TIERS is not 5 - you need to add allocations here -#endif -struct rrdengine_instance *multidb_ctx[RRD_STORAGE_TIERS]; -uint8_t tier_page_type[RRD_STORAGE_TIERS] = {PAGE_METRICS, PAGE_TIER, PAGE_TIER, PAGE_TIER, PAGE_TIER}; - -#if defined(ENV32BIT) -size_t tier_page_size[RRD_STORAGE_TIERS] = {2048, 1024, 192, 192, 192}; -#else -size_t tier_page_size[RRD_STORAGE_TIERS] = {4096, 2048, 384, 384, 384}; -#endif - -#if PAGE_TYPE_MAX != 2 -#error PAGE_TYPE_MAX is not 2 - you need to add allocations here -#endif - -size_t page_type_size[256] = { - [PAGE_METRICS] = sizeof(storage_number), - [PAGE_TIER] = sizeof(storage_number_tier1_t), - [PAGE_GORILLA_METRICS] = sizeof(storage_number) -}; - -__attribute__((constructor)) void initialize_multidb_ctx(void) { - multidb_ctx[0] = &multidb_ctx_storage_tier0; - multidb_ctx[1] = &multidb_ctx_storage_tier1; - multidb_ctx[2] = &multidb_ctx_storage_tier2; - multidb_ctx[3] = &multidb_ctx_storage_tier3; - multidb_ctx[4] = &multidb_ctx_storage_tier4; -} - -int db_engine_journal_check = 0; -int default_rrdeng_disk_quota_mb = 256; -int default_multidb_disk_quota_mb = 256; - -#if defined(ENV32BIT) -int default_rrdeng_page_cache_mb = 16; -int default_rrdeng_extent_cache_mb = 0; -#else -int default_rrdeng_page_cache_mb = 32; -int default_rrdeng_extent_cache_mb = 0; -#endif - -// ---------------------------------------------------------------------------- -// metrics groups - -static inline void rrdeng_page_alignment_acquire(struct pg_alignment *pa) { - if(unlikely(!pa)) return; - __atomic_add_fetch(&pa->refcount, 1, __ATOMIC_SEQ_CST); -} - -static inline bool rrdeng_page_alignment_release(struct pg_alignment *pa) { - if(unlikely(!pa)) return true; - - if(__atomic_sub_fetch(&pa->refcount, 1, __ATOMIC_SEQ_CST) == 0) { - freez(pa); - return true; - } - - return false; -} - -// charts call this -STORAGE_METRICS_GROUP *rrdeng_metrics_group_get(STORAGE_INSTANCE *db_instance __maybe_unused, uuid_t *uuid __maybe_unused) { - struct pg_alignment *pa = callocz(1, sizeof(struct pg_alignment)); - rrdeng_page_alignment_acquire(pa); - return (STORAGE_METRICS_GROUP *)pa; -} - -// charts call this -void rrdeng_metrics_group_release(STORAGE_INSTANCE *db_instance __maybe_unused, STORAGE_METRICS_GROUP *smg) { - if(unlikely(!smg)) return; - - struct pg_alignment *pa = (struct pg_alignment *)smg; - rrdeng_page_alignment_release(pa); -} - -// ---------------------------------------------------------------------------- -// metric handle for legacy dbs - -/* This UUID is not unique across hosts */ -void rrdeng_generate_legacy_uuid(const char *dim_id, const char *chart_id, uuid_t *ret_uuid) -{ - EVP_MD_CTX *evpctx; - unsigned char hash_value[EVP_MAX_MD_SIZE]; - unsigned int hash_len; - - evpctx = EVP_MD_CTX_create(); - EVP_DigestInit_ex(evpctx, EVP_sha256(), NULL); - EVP_DigestUpdate(evpctx, dim_id, strlen(dim_id)); - EVP_DigestUpdate(evpctx, chart_id, strlen(chart_id)); - EVP_DigestFinal_ex(evpctx, hash_value, &hash_len); - EVP_MD_CTX_destroy(evpctx); - fatal_assert(hash_len > sizeof(uuid_t)); - memcpy(ret_uuid, hash_value, sizeof(uuid_t)); -} - -static METRIC *rrdeng_metric_get_legacy(STORAGE_INSTANCE *db_instance, const char *rd_id, const char *st_id) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - uuid_t legacy_uuid; - rrdeng_generate_legacy_uuid(rd_id, st_id, &legacy_uuid); - return mrg_metric_get_and_acquire(main_mrg, &legacy_uuid, (Word_t) ctx); -} - -// ---------------------------------------------------------------------------- -// metric handle - -void rrdeng_metric_release(STORAGE_METRIC_HANDLE *db_metric_handle) { - METRIC *metric = (METRIC *)db_metric_handle; - mrg_metric_release(main_mrg, metric); -} - -STORAGE_METRIC_HANDLE *rrdeng_metric_dup(STORAGE_METRIC_HANDLE *db_metric_handle) { - METRIC *metric = (METRIC *)db_metric_handle; - return (STORAGE_METRIC_HANDLE *) mrg_metric_dup(main_mrg, metric); -} - -STORAGE_METRIC_HANDLE *rrdeng_metric_get(STORAGE_INSTANCE *db_instance, uuid_t *uuid) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - return (STORAGE_METRIC_HANDLE *) mrg_metric_get_and_acquire(main_mrg, uuid, (Word_t) ctx); -} - -static METRIC *rrdeng_metric_create(STORAGE_INSTANCE *db_instance, uuid_t *uuid) { - internal_fatal(!db_instance, "DBENGINE: db_instance is NULL"); - - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - MRG_ENTRY entry = { - .uuid = uuid, - .section = (Word_t)ctx, - .first_time_s = 0, - .last_time_s = 0, - .latest_update_every_s = 0, - }; - - METRIC *metric = mrg_metric_add_and_acquire(main_mrg, entry, NULL); - return metric; -} - -STORAGE_METRIC_HANDLE *rrdeng_metric_get_or_create(RRDDIM *rd, STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - METRIC *metric; - - metric = mrg_metric_get_and_acquire(main_mrg, &rd->metric_uuid, (Word_t) ctx); - - if(unlikely(!metric)) { - if(unlikely(ctx->config.legacy)) { - // this is a single host database - // generate uuid from the chart and dimensions ids - // and overwrite the one supplied by rrddim - metric = rrdeng_metric_get_legacy(db_instance, rrddim_id(rd), rrdset_id(rd->rrdset)); - if (metric) - uuid_copy(rd->metric_uuid, *mrg_metric_uuid(main_mrg, metric)); - } - - if(likely(!metric)) - metric = rrdeng_metric_create(db_instance, &rd->metric_uuid); - } - -#ifdef NETDATA_INTERNAL_CHECKS - if(uuid_memcmp(&rd->metric_uuid, mrg_metric_uuid(main_mrg, metric)) != 0) { - char uuid1[UUID_STR_LEN + 1]; - char uuid2[UUID_STR_LEN + 1]; - - uuid_unparse(rd->metric_uuid, uuid1); - uuid_unparse(*mrg_metric_uuid(main_mrg, metric), uuid2); - fatal("DBENGINE: uuids do not match, asked for metric '%s', but got metric '%s'", uuid1, uuid2); - } - - if(mrg_metric_ctx(metric) != ctx) - fatal("DBENGINE: mixed up db instances, asked for metric from %p, got from %p", - ctx, mrg_metric_ctx(metric)); -#endif - - return (STORAGE_METRIC_HANDLE *)metric; -} - - -// ---------------------------------------------------------------------------- -// collect ops - -static inline void check_and_fix_mrg_update_every(struct rrdeng_collect_handle *handle) { - if(unlikely((time_t)(handle->update_every_ut / USEC_PER_SEC) != mrg_metric_get_update_every_s(main_mrg, handle->metric))) { - internal_error(true, "DBENGINE: collection handle has update every %ld, but the metric registry has %ld. Fixing it.", - (time_t)(handle->update_every_ut / USEC_PER_SEC), mrg_metric_get_update_every_s(main_mrg, handle->metric)); - - if(unlikely(!handle->update_every_ut)) - handle->update_every_ut = (usec_t)mrg_metric_get_update_every_s(main_mrg, handle->metric) * USEC_PER_SEC; - else - mrg_metric_set_update_every(main_mrg, handle->metric, (time_t)(handle->update_every_ut / USEC_PER_SEC)); - } -} - -static inline bool check_completed_page_consistency(struct rrdeng_collect_handle *handle __maybe_unused) { -#ifdef NETDATA_INTERNAL_CHECKS - if (unlikely(!handle->pgc_page || !handle->page_entries_max || !handle->page_position || !handle->page_end_time_ut)) - return false; - - struct rrdengine_instance *ctx = mrg_metric_ctx(handle->metric); - - uuid_t *uuid = mrg_metric_uuid(main_mrg, handle->metric); - time_t start_time_s = pgc_page_start_time_s(handle->pgc_page); - time_t end_time_s = pgc_page_end_time_s(handle->pgc_page); - time_t update_every_s = pgc_page_update_every_s(handle->pgc_page); - size_t page_length = handle->page_position * CTX_POINT_SIZE_BYTES(ctx); - size_t entries = handle->page_position; - time_t overwrite_zero_update_every_s = (time_t)(handle->update_every_ut / USEC_PER_SEC); - - if(end_time_s > max_acceptable_collected_time()) - handle->page_flags |= RRDENG_PAGE_COMPLETED_IN_FUTURE; - - VALIDATED_PAGE_DESCRIPTOR vd = validate_page( - uuid, - start_time_s, - end_time_s, - update_every_s, - page_length, - ctx->config.page_type, - entries, - 0, // do not check for future timestamps - we inherit the timestamps of the children - overwrite_zero_update_every_s, - false, - "collected", - handle->page_flags); - - return vd.is_valid; -#else - return true; -#endif -} - -/* - * Gets a handle for storing metrics to the database. - * The handle must be released with rrdeng_store_metric_final(). - */ -STORAGE_COLLECT_HANDLE *rrdeng_store_metric_init(STORAGE_METRIC_HANDLE *db_metric_handle, uint32_t update_every, STORAGE_METRICS_GROUP *smg) { - METRIC *metric = (METRIC *)db_metric_handle; - struct rrdengine_instance *ctx = mrg_metric_ctx(metric); - - bool is_1st_metric_writer = true; - if(!mrg_metric_set_writer(main_mrg, metric)) { - is_1st_metric_writer = false; - char uuid[UUID_STR_LEN + 1]; - uuid_unparse(*mrg_metric_uuid(main_mrg, metric), uuid); - netdata_log_error("DBENGINE: metric '%s' is already collected and should not be collected twice - expect gaps on the charts", uuid); - } - - metric = mrg_metric_dup(main_mrg, metric); - - struct rrdeng_collect_handle *handle; - - handle = callocz(1, sizeof(struct rrdeng_collect_handle)); - handle->common.backend = STORAGE_ENGINE_BACKEND_DBENGINE; - handle->metric = metric; - - handle->pgc_page = NULL; - handle->page_data = NULL; - handle->page_data_size = 0; - - handle->page_position = 0; - handle->page_entries_max = 0; - handle->update_every_ut = (usec_t)update_every * USEC_PER_SEC; - handle->options = is_1st_metric_writer ? RRDENG_1ST_METRIC_WRITER : 0; - - __atomic_add_fetch(&ctx->atomic.collectors_running, 1, __ATOMIC_RELAXED); - if(!is_1st_metric_writer) - __atomic_add_fetch(&ctx->atomic.collectors_running_duplicate, 1, __ATOMIC_RELAXED); - - mrg_metric_set_update_every(main_mrg, metric, update_every); - - handle->alignment = (struct pg_alignment *)smg; - rrdeng_page_alignment_acquire(handle->alignment); - - // this is important! - // if we don't set the page_end_time_ut during the first collection - // data collection may be able to go back in time and during the addition of new pages - // clean pages may be found matching ours! - - time_t db_first_time_s, db_last_time_s, db_update_every_s; - mrg_metric_get_retention(main_mrg, metric, &db_first_time_s, &db_last_time_s, &db_update_every_s); - handle->page_end_time_ut = (usec_t)db_last_time_s * USEC_PER_SEC; - - return (STORAGE_COLLECT_HANDLE *)handle; -} - -void rrdeng_store_metric_flush_current_page(STORAGE_COLLECT_HANDLE *collection_handle) { - struct rrdeng_collect_handle *handle = (struct rrdeng_collect_handle *)collection_handle; - - if (unlikely(!handle->pgc_page)) - return; - - if(pgd_is_empty(handle->page_data)) - pgc_page_to_clean_evict_or_release(main_cache, handle->pgc_page); - - else { - check_completed_page_consistency(handle); - mrg_metric_set_clean_latest_time_s(main_mrg, handle->metric, pgc_page_end_time_s(handle->pgc_page)); - pgc_page_hot_to_dirty_and_release(main_cache, handle->pgc_page); - } - - mrg_metric_set_hot_latest_time_s(main_mrg, handle->metric, 0); - - handle->pgc_page = NULL; - handle->page_flags = 0; - handle->page_position = 0; - handle->page_entries_max = 0; - handle->page_data = NULL; - handle->page_data_size = 0; - - // important! - // we should never zero page end time ut, because this will allow - // collection to go back in time - // handle->page_end_time_ut = 0; - // handle->page_start_time_ut; - - check_and_fix_mrg_update_every(handle); - - timing_step(TIMING_STEP_DBENGINE_FLUSH_PAGE); -} - -static void rrdeng_store_metric_create_new_page(struct rrdeng_collect_handle *handle, - struct rrdengine_instance *ctx, - usec_t point_in_time_ut, - PGD *data, - size_t data_size) { - time_t point_in_time_s = (time_t)(point_in_time_ut / USEC_PER_SEC); - const time_t update_every_s = (time_t)(handle->update_every_ut / USEC_PER_SEC); - - PGC_ENTRY page_entry = { - .section = (Word_t) ctx, - .metric_id = mrg_metric_id(main_mrg, handle->metric), - .start_time_s = point_in_time_s, - .end_time_s = point_in_time_s, - .size = data_size, - .data = data, - .update_every_s = (uint32_t) update_every_s, - .hot = true - }; - - size_t conflicts = 0; - bool added = true; - PGC_PAGE *pgc_page = pgc_page_add_and_acquire(main_cache, page_entry, &added); - while (unlikely(!added)) { - conflicts++; - - char uuid[UUID_STR_LEN + 1]; - uuid_unparse(*mrg_metric_uuid(main_mrg, handle->metric), uuid); - -#ifdef NETDATA_INTERNAL_CHECKS - internal_error(true, -#else - nd_log_limit_static_global_var(erl, 1, 0); - nd_log_limit(&erl, NDLS_DAEMON, NDLP_WARNING, -#endif - "DBENGINE: metric '%s' new page from %ld to %ld, update every %ld, has a conflict in main cache " - "with existing %s%s page from %ld to %ld, update every %ld - " - "is it collected more than once?", - uuid, - page_entry.start_time_s, page_entry.end_time_s, (time_t)page_entry.update_every_s, - pgc_is_page_hot(pgc_page) ? "hot" : "not-hot", - pgc_page_data(pgc_page) == PGD_EMPTY ? " gap" : "", - pgc_page_start_time_s(pgc_page), pgc_page_end_time_s(pgc_page), pgc_page_update_every_s(pgc_page) - ); - - pgc_page_release(main_cache, pgc_page); - - point_in_time_ut -= handle->update_every_ut; - point_in_time_s = (time_t)(point_in_time_ut / USEC_PER_SEC); - page_entry.start_time_s = point_in_time_s; - page_entry.end_time_s = point_in_time_s; - pgc_page = pgc_page_add_and_acquire(main_cache, page_entry, &added); - } - - handle->page_entries_max = data_size / CTX_POINT_SIZE_BYTES(ctx); - handle->page_start_time_ut = point_in_time_ut; - handle->page_end_time_ut = point_in_time_ut; - handle->page_position = 1; // zero is already in our data - handle->pgc_page = pgc_page; - handle->page_flags = conflicts? RRDENG_PAGE_CONFLICT : 0; - - if(point_in_time_s > max_acceptable_collected_time()) - handle->page_flags |= RRDENG_PAGE_CREATED_IN_FUTURE; - - check_and_fix_mrg_update_every(handle); - - timing_step(TIMING_STEP_DBENGINE_CREATE_NEW_PAGE); -} - -static size_t aligned_allocation_entries(size_t max_slots, size_t target_slot, time_t now_s) { - size_t slots = target_slot; - size_t pos = (now_s % max_slots); - - if(pos > slots) - slots += max_slots - pos; - - else if(pos < slots) - slots -= pos; - - else - slots = max_slots; - - return slots; -} - -static PGD *rrdeng_alloc_new_page_data(struct rrdeng_collect_handle *handle, size_t *data_size, usec_t point_in_time_ut) { - struct rrdengine_instance *ctx = mrg_metric_ctx(handle->metric); - - PGD *d = NULL; - - size_t max_size = tier_page_size[ctx->config.tier]; - size_t max_slots = max_size / CTX_POINT_SIZE_BYTES(ctx); - - size_t slots = aligned_allocation_entries( - max_slots, - indexing_partition((Word_t) handle->alignment, max_slots), - (time_t) (point_in_time_ut / USEC_PER_SEC) - ); - - if(slots < max_slots / 3) - slots = max_slots / 3; - - if(slots < 3) - slots = 3; - - size_t size = slots * CTX_POINT_SIZE_BYTES(ctx); - - // internal_error(true, "PAGE ALLOC %zu bytes (%zu max)", size, max_size); - - internal_fatal(slots < 3 || slots > max_slots, "ooops! wrong distribution of metrics across time"); - internal_fatal(size > tier_page_size[ctx->config.tier] || size < CTX_POINT_SIZE_BYTES(ctx) * 2, "ooops! wrong page size"); - - *data_size = size; - - switch (ctx->config.page_type) { - case PAGE_METRICS: - case PAGE_TIER: - d = pgd_create(ctx->config.page_type, slots); - break; - case PAGE_GORILLA_METRICS: - // ignore slots, and use the fixed number of slots per gorilla buffer. - // gorilla will automatically add more buffers if needed. - d = pgd_create(ctx->config.page_type, GORILLA_BUFFER_SLOTS); - break; - default: - fatal("Unknown page type: %uc\n", ctx->config.page_type); - } - - timing_step(TIMING_STEP_DBENGINE_PAGE_ALLOC); - return d; -} - -static void rrdeng_store_metric_append_point(STORAGE_COLLECT_HANDLE *collection_handle, - const usec_t point_in_time_ut, - const NETDATA_DOUBLE n, - const NETDATA_DOUBLE min_value, - const NETDATA_DOUBLE max_value, - const uint16_t count, - const uint16_t anomaly_count, - const SN_FLAGS flags) -{ - struct rrdeng_collect_handle *handle = (struct rrdeng_collect_handle *)collection_handle; - struct rrdengine_instance *ctx = mrg_metric_ctx(handle->metric); - - if(unlikely(!handle->page_data)) - handle->page_data = rrdeng_alloc_new_page_data(handle, &handle->page_data_size, point_in_time_ut); - - timing_step(TIMING_STEP_DBENGINE_CHECK_DATA); - - pgd_append_point(handle->page_data, - point_in_time_ut, - n, min_value, max_value, count, anomaly_count, flags, - handle->page_position); - - timing_step(TIMING_STEP_DBENGINE_PACK); - - if(unlikely(!handle->pgc_page)) { - rrdeng_store_metric_create_new_page(handle, ctx, point_in_time_ut, handle->page_data, handle->page_data_size); - // handle->position is set to 1 already - } - else { - // update an existing page - pgc_page_hot_set_end_time_s(main_cache, handle->pgc_page, (time_t) (point_in_time_ut / USEC_PER_SEC)); - handle->page_end_time_ut = point_in_time_ut; - - if(unlikely(++handle->page_position >= handle->page_entries_max)) { - internal_fatal(handle->page_position > handle->page_entries_max, "DBENGINE: exceeded page max number of points"); - handle->page_flags |= RRDENG_PAGE_FULL; - rrdeng_store_metric_flush_current_page(collection_handle); - } - } - - timing_step(TIMING_STEP_DBENGINE_PAGE_FIN); - - // update the metric information - mrg_metric_set_hot_latest_time_s(main_mrg, handle->metric, (time_t) (point_in_time_ut / USEC_PER_SEC)); - - timing_step(TIMING_STEP_DBENGINE_MRG_UPDATE); -} - -static void store_metric_next_error_log(struct rrdeng_collect_handle *handle __maybe_unused, usec_t point_in_time_ut __maybe_unused, const char *msg __maybe_unused) { -#ifdef NETDATA_INTERNAL_CHECKS - time_t point_in_time_s = (time_t)(point_in_time_ut / USEC_PER_SEC); - char uuid[UUID_STR_LEN + 1]; - uuid_unparse(*mrg_metric_uuid(main_mrg, handle->metric), uuid); - - BUFFER *wb = NULL; - if(handle->pgc_page && handle->page_flags) { - wb = buffer_create(0, NULL); - collect_page_flags_to_buffer(wb, handle->page_flags); - } - - nd_log_limit_static_global_var(erl, 1, 0); - nd_log_limit(&erl, NDLS_DAEMON, NDLP_NOTICE, - "DBENGINE: metric '%s' collected point at %ld, %s last collection at %ld, " - "update every %ld, %s page from %ld to %ld, position %u (of %u), flags: %s", - uuid, - point_in_time_s, - msg, - (time_t)(handle->page_end_time_ut / USEC_PER_SEC), - (time_t)(handle->update_every_ut / USEC_PER_SEC), - handle->pgc_page ? "current" : "*LAST*", - (time_t)(handle->page_start_time_ut / USEC_PER_SEC), - (time_t)(handle->page_end_time_ut / USEC_PER_SEC), - handle->page_position, handle->page_entries_max, - wb ? buffer_tostring(wb) : "" - ); - - buffer_free(wb); -#else - ; -#endif -} - -void rrdeng_store_metric_next(STORAGE_COLLECT_HANDLE *collection_handle, - const usec_t point_in_time_ut, - const NETDATA_DOUBLE n, - const NETDATA_DOUBLE min_value, - const NETDATA_DOUBLE max_value, - const uint16_t count, - const uint16_t anomaly_count, - const SN_FLAGS flags) -{ - timing_step(TIMING_STEP_RRDSET_STORE_METRIC); - - struct rrdeng_collect_handle *handle = (struct rrdeng_collect_handle *)collection_handle; - -#ifdef NETDATA_INTERNAL_CHECKS - if(unlikely(point_in_time_ut > (usec_t)max_acceptable_collected_time() * USEC_PER_SEC)) - handle->page_flags |= RRDENG_PAGE_FUTURE_POINT; -#endif - - usec_t delta_ut = point_in_time_ut - handle->page_end_time_ut; - - if(likely(delta_ut == handle->update_every_ut)) { - // happy path - ; - } - else if(unlikely(point_in_time_ut > handle->page_end_time_ut)) { - if(handle->pgc_page) { - if (unlikely(delta_ut < handle->update_every_ut)) { - handle->page_flags |= RRDENG_PAGE_STEP_TOO_SMALL; - rrdeng_store_metric_flush_current_page(collection_handle); - } - else if (unlikely(delta_ut % handle->update_every_ut)) { - handle->page_flags |= RRDENG_PAGE_STEP_UNALIGNED; - rrdeng_store_metric_flush_current_page(collection_handle); - } - else { - size_t points_gap = delta_ut / handle->update_every_ut; - size_t page_remaining_points = handle->page_entries_max - handle->page_position; - - if (points_gap >= page_remaining_points) { - handle->page_flags |= RRDENG_PAGE_BIG_GAP; - rrdeng_store_metric_flush_current_page(collection_handle); - } - else { - // loop to fill the gap - handle->page_flags |= RRDENG_PAGE_GAP; - - usec_t stop_ut = point_in_time_ut - handle->update_every_ut; - for (usec_t this_ut = handle->page_end_time_ut + handle->update_every_ut; - this_ut <= stop_ut; - this_ut = handle->page_end_time_ut + handle->update_every_ut) { - rrdeng_store_metric_append_point( - collection_handle, - this_ut, - NAN, NAN, NAN, - 1, 0, - SN_EMPTY_SLOT); - } - } - } - } - } - else if(unlikely(point_in_time_ut < handle->page_end_time_ut)) { - handle->page_flags |= RRDENG_PAGE_PAST_COLLECTION; - store_metric_next_error_log(handle, point_in_time_ut, "is older than the"); - return; - } - - else /* if(unlikely(point_in_time_ut == handle->page_end_time_ut)) */ { - handle->page_flags |= RRDENG_PAGE_REPEATED_COLLECTION; - store_metric_next_error_log(handle, point_in_time_ut, "is at the same time as the"); - return; - } - - timing_step(TIMING_STEP_DBENGINE_FIRST_CHECK); - - rrdeng_store_metric_append_point(collection_handle, - point_in_time_ut, - n, min_value, max_value, - count, anomaly_count, - flags); -} - -/* - * Releases the database reference from the handle for storing metrics. - * Returns 1 if it's safe to delete the dimension. - */ -int rrdeng_store_metric_finalize(STORAGE_COLLECT_HANDLE *collection_handle) { - struct rrdeng_collect_handle *handle = (struct rrdeng_collect_handle *)collection_handle; - struct rrdengine_instance *ctx = mrg_metric_ctx(handle->metric); - - handle->page_flags |= RRDENG_PAGE_COLLECT_FINALIZE; - rrdeng_store_metric_flush_current_page(collection_handle); - rrdeng_page_alignment_release(handle->alignment); - - __atomic_sub_fetch(&ctx->atomic.collectors_running, 1, __ATOMIC_RELAXED); - if(!(handle->options & RRDENG_1ST_METRIC_WRITER)) - __atomic_sub_fetch(&ctx->atomic.collectors_running_duplicate, 1, __ATOMIC_RELAXED); - - if((handle->options & RRDENG_1ST_METRIC_WRITER) && !mrg_metric_clear_writer(main_mrg, handle->metric)) - internal_fatal(true, "DBENGINE: metric is already released"); - - time_t first_time_s, last_time_s, update_every_s; - mrg_metric_get_retention(main_mrg, handle->metric, &first_time_s, &last_time_s, &update_every_s); - - mrg_metric_release(main_mrg, handle->metric); - freez(handle); - - if(!first_time_s && !last_time_s) - return 1; - - return 0; -} - -void rrdeng_store_metric_change_collection_frequency(STORAGE_COLLECT_HANDLE *collection_handle, int update_every) { - struct rrdeng_collect_handle *handle = (struct rrdeng_collect_handle *)collection_handle; - check_and_fix_mrg_update_every(handle); - - METRIC *metric = handle->metric; - usec_t update_every_ut = (usec_t)update_every * USEC_PER_SEC; - - if(update_every_ut == handle->update_every_ut) - return; - - handle->page_flags |= RRDENG_PAGE_UPDATE_EVERY_CHANGE; - rrdeng_store_metric_flush_current_page(collection_handle); - mrg_metric_set_update_every(main_mrg, metric, update_every); - handle->update_every_ut = update_every_ut; -} - -// ---------------------------------------------------------------------------- -// query ops - -#ifdef NETDATA_INTERNAL_CHECKS -SPINLOCK global_query_handle_spinlock = NETDATA_SPINLOCK_INITIALIZER; -static struct rrdeng_query_handle *global_query_handle_ll = NULL; -static void register_query_handle(struct rrdeng_query_handle *handle) { - handle->query_pid = gettid(); - handle->started_time_s = now_realtime_sec(); - - spinlock_lock(&global_query_handle_spinlock); - DOUBLE_LINKED_LIST_APPEND_ITEM_UNSAFE(global_query_handle_ll, handle, prev, next); - spinlock_unlock(&global_query_handle_spinlock); -} -static void unregister_query_handle(struct rrdeng_query_handle *handle) { - spinlock_lock(&global_query_handle_spinlock); - DOUBLE_LINKED_LIST_REMOVE_ITEM_UNSAFE(global_query_handle_ll, handle, prev, next); - spinlock_unlock(&global_query_handle_spinlock); -} -#else -static void register_query_handle(struct rrdeng_query_handle *handle __maybe_unused) { - ; -} -static void unregister_query_handle(struct rrdeng_query_handle *handle __maybe_unused) { - ; -} -#endif - -/* - * Gets a handle for loading metrics from the database. - * The handle must be released with rrdeng_load_metric_final(). - */ -void rrdeng_load_metric_init(STORAGE_METRIC_HANDLE *db_metric_handle, - struct storage_engine_query_handle *rrddim_handle, - time_t start_time_s, - time_t end_time_s, - STORAGE_PRIORITY priority) -{ - usec_t started_ut = now_monotonic_usec(); - - netdata_thread_disable_cancelability(); - - METRIC *metric = (METRIC *)db_metric_handle; - struct rrdengine_instance *ctx = mrg_metric_ctx(metric); - struct rrdeng_query_handle *handle; - - handle = rrdeng_query_handle_get(); - register_query_handle(handle); - - if (unlikely(priority < STORAGE_PRIORITY_HIGH)) - priority = STORAGE_PRIORITY_HIGH; - else if (unlikely(priority >= STORAGE_PRIORITY_INTERNAL_MAX_DONT_USE)) - priority = STORAGE_PRIORITY_INTERNAL_MAX_DONT_USE - 1; - - handle->ctx = ctx; - handle->metric = metric; - handle->priority = priority; - - // IMPORTANT! - // It is crucial not to exceed the db boundaries, because dbengine - // now has gap caching, so when a gap is detected a negative page - // is inserted into the main cache, to avoid scanning the journals - // again for pages matching the gap. - - time_t db_first_time_s, db_last_time_s, db_update_every_s; - mrg_metric_get_retention(main_mrg, metric, &db_first_time_s, &db_last_time_s, &db_update_every_s); - - if(is_page_in_time_range(start_time_s, end_time_s, db_first_time_s, db_last_time_s) == PAGE_IS_IN_RANGE) { - handle->start_time_s = MAX(start_time_s, db_first_time_s); - handle->end_time_s = MIN(end_time_s, db_last_time_s); - handle->now_s = handle->start_time_s; - - handle->dt_s = db_update_every_s; - if (!handle->dt_s) { - handle->dt_s = default_rrd_update_every; - mrg_metric_set_update_every_s_if_zero(main_mrg, metric, default_rrd_update_every); - } - - rrddim_handle->handle = (STORAGE_QUERY_HANDLE *) handle; - rrddim_handle->start_time_s = handle->start_time_s; - rrddim_handle->end_time_s = handle->end_time_s; - rrddim_handle->priority = priority; - rrddim_handle->backend = STORAGE_ENGINE_BACKEND_DBENGINE; - - pg_cache_preload(handle); - - __atomic_add_fetch(&rrdeng_cache_efficiency_stats.query_time_init, now_monotonic_usec() - started_ut, __ATOMIC_RELAXED); - } - else { - handle->start_time_s = start_time_s; - handle->end_time_s = end_time_s; - handle->now_s = start_time_s; - handle->dt_s = db_update_every_s; - - rrddim_handle->handle = (STORAGE_QUERY_HANDLE *) handle; - rrddim_handle->start_time_s = handle->start_time_s; - rrddim_handle->end_time_s = 0; - rrddim_handle->priority = priority; - rrddim_handle->backend = STORAGE_ENGINE_BACKEND_DBENGINE; - } -} - -static bool rrdeng_load_page_next(struct storage_engine_query_handle *rrddim_handle, bool debug_this __maybe_unused) { - struct rrdeng_query_handle *handle = (struct rrdeng_query_handle *)rrddim_handle->handle; - struct rrdengine_instance *ctx = mrg_metric_ctx(handle->metric); - - if (likely(handle->page)) { - // we have a page to release - pgc_page_release(main_cache, handle->page); - handle->page = NULL; - pgdc_reset(&handle->pgdc, NULL, UINT32_MAX); - } - - if (unlikely(handle->now_s > rrddim_handle->end_time_s)) - return false; - - size_t entries = 0; - handle->page = pg_cache_lookup_next(ctx, handle->pdc, handle->now_s, handle->dt_s, &entries); - - internal_fatal(handle->page && (pgc_page_data(handle->page) == PGD_EMPTY || !entries), - "A page was returned, but it is empty - pg_cache_lookup_next() should be handling this case"); - - if (unlikely(!handle->page || pgc_page_data(handle->page) == PGD_EMPTY || !entries)) - return false; - - time_t page_start_time_s = pgc_page_start_time_s(handle->page); - time_t page_end_time_s = pgc_page_end_time_s(handle->page); - time_t page_update_every_s = pgc_page_update_every_s(handle->page); - - unsigned position; - if(likely(handle->now_s >= page_start_time_s && handle->now_s <= page_end_time_s)) { - - if(unlikely(entries == 1 || page_start_time_s == page_end_time_s || !page_update_every_s)) { - position = 0; - handle->now_s = page_start_time_s; - } - else { - position = (handle->now_s - page_start_time_s) * (entries - 1) / (page_end_time_s - page_start_time_s); - time_t point_end_time_s = page_start_time_s + position * page_update_every_s; - while(point_end_time_s < handle->now_s && position + 1 < entries) { - // https://github.com/netdata/netdata/issues/14411 - // we really need a while() here, because the delta may be - // 2 points at higher tiers - position++; - point_end_time_s = page_start_time_s + position * page_update_every_s; - } - handle->now_s = point_end_time_s; - } - - internal_fatal(position >= entries, "DBENGINE: wrong page position calculation"); - } - else if(handle->now_s < page_start_time_s) { - handle->now_s = page_start_time_s; - position = 0; - } - else { - internal_fatal(true, "DBENGINE: this page is entirely in our past and should not be accepted for this query in the first place"); - handle->now_s = page_end_time_s; - position = entries - 1; - } - - handle->entries = entries; - handle->position = position; - handle->dt_s = page_update_every_s; - - pgdc_reset(&handle->pgdc, pgc_page_data(handle->page), handle->position); - - return true; -} - -// 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 rrdeng_load_metric_next(struct storage_engine_query_handle *rrddim_handle) { - struct rrdeng_query_handle *handle = (struct rrdeng_query_handle *)rrddim_handle->handle; - STORAGE_POINT sp; - - if (unlikely(handle->now_s > rrddim_handle->end_time_s)) { - storage_point_empty(sp, handle->now_s - handle->dt_s, handle->now_s); - goto prepare_for_next_iteration; - } - - if (unlikely(!handle->page || handle->position >= handle->entries)) { - // We need to get a new page - - if (!rrdeng_load_page_next(rrddim_handle, false)) { - handle->now_s = rrddim_handle->end_time_s; - storage_point_empty(sp, handle->now_s - handle->dt_s, handle->now_s); - goto prepare_for_next_iteration; - } - } - - sp.start_time_s = handle->now_s - handle->dt_s; - sp.end_time_s = handle->now_s; - - pgdc_get_next_point(&handle->pgdc, handle->position, &sp); - -prepare_for_next_iteration: - internal_fatal(sp.end_time_s < rrddim_handle->start_time_s, "DBENGINE: this point is too old for this query"); - internal_fatal(sp.end_time_s < handle->now_s, "DBENGINE: this point is too old for this point in time"); - - handle->now_s += handle->dt_s; - handle->position++; - - return sp; -} - -int rrdeng_load_metric_is_finished(struct storage_engine_query_handle *rrddim_handle) { - struct rrdeng_query_handle *handle = (struct rrdeng_query_handle *)rrddim_handle->handle; - return (handle->now_s > rrddim_handle->end_time_s); -} - -/* - * Releases the database reference from the handle for loading metrics. - */ -void rrdeng_load_metric_finalize(struct storage_engine_query_handle *rrddim_handle) -{ - struct rrdeng_query_handle *handle = (struct rrdeng_query_handle *)rrddim_handle->handle; - - if (handle->page) { - pgc_page_release(main_cache, handle->page); - pgdc_reset(&handle->pgdc, NULL, UINT32_MAX); - } - - if(!pdc_release_and_destroy_if_unreferenced(handle->pdc, false, false)) - __atomic_store_n(&handle->pdc->workers_should_stop, true, __ATOMIC_RELAXED); - - unregister_query_handle(handle); - rrdeng_query_handle_release(handle); - rrddim_handle->handle = NULL; - netdata_thread_enable_cancelability(); -} - -time_t rrdeng_load_align_to_optimal_before(struct storage_engine_query_handle *rrddim_handle) { - struct rrdeng_query_handle *handle = (struct rrdeng_query_handle *)rrddim_handle->handle; - - if(handle->pdc) { - rrdeng_prep_wait(handle->pdc); - if (handle->pdc->optimal_end_time_s > rrddim_handle->end_time_s) - rrddim_handle->end_time_s = handle->pdc->optimal_end_time_s; - } - - return rrddim_handle->end_time_s; -} - -time_t rrdeng_metric_latest_time(STORAGE_METRIC_HANDLE *db_metric_handle) { - METRIC *metric = (METRIC *)db_metric_handle; - time_t latest_time_s = 0; - - if (metric) - latest_time_s = mrg_metric_get_latest_time_s(main_mrg, metric); - - return latest_time_s; -} - -time_t rrdeng_metric_oldest_time(STORAGE_METRIC_HANDLE *db_metric_handle) { - METRIC *metric = (METRIC *)db_metric_handle; - - time_t oldest_time_s = 0; - if (metric) - oldest_time_s = mrg_metric_get_first_time_s(main_mrg, metric); - - return oldest_time_s; -} - -bool rrdeng_metric_retention_by_uuid(STORAGE_INSTANCE *db_instance, uuid_t *dim_uuid, time_t *first_entry_s, time_t *last_entry_s) -{ - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - if (unlikely(!ctx)) { - netdata_log_error("DBENGINE: invalid STORAGE INSTANCE to %s()", __FUNCTION__); - return false; - } - - METRIC *metric = mrg_metric_get_and_acquire(main_mrg, dim_uuid, (Word_t) ctx); - if (unlikely(!metric)) - return false; - - time_t update_every_s; - mrg_metric_get_retention(main_mrg, metric, first_entry_s, last_entry_s, &update_every_s); - - mrg_metric_release(main_mrg, metric); - - return true; -} - -uint64_t rrdeng_disk_space_max(STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - return ctx->config.max_disk_space; -} - -uint64_t rrdeng_disk_space_used(STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - return __atomic_load_n(&ctx->atomic.current_disk_space, __ATOMIC_RELAXED); -} - -time_t rrdeng_global_first_time_s(STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - - time_t t = __atomic_load_n(&ctx->atomic.first_time_s, __ATOMIC_RELAXED); - if(t == LONG_MAX || t < 0) - t = 0; - - return t; -} - -size_t rrdeng_currently_collected_metrics(STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - return __atomic_load_n(&ctx->atomic.collectors_running, __ATOMIC_RELAXED); -} - -/* - * Gathers Database Engine statistics. - * Careful when modifying this function. - * You must not change the indices of the statistics or user code will break. - * You must not exceed RRDENG_NR_STATS or it will crash. - */ -void rrdeng_get_37_statistics(struct rrdengine_instance *ctx, unsigned long long *array) -{ - if (ctx == NULL) - return; - - array[0] = (uint64_t)__atomic_load_n(&ctx->atomic.collectors_running, __ATOMIC_RELAXED); // API producers - array[1] = (uint64_t)__atomic_load_n(&ctx->atomic.inflight_queries, __ATOMIC_RELAXED); // API consumers - array[2] = 0; - array[3] = 0; - array[4] = 0; - array[5] = 0; // (uint64_t)ctx->stats.pg_cache_insertions; - array[6] = 0; // (uint64_t)ctx->stats.pg_cache_deletions; - array[7] = 0; // (uint64_t)ctx->stats.pg_cache_hits; - array[8] = 0; // (uint64_t)ctx->stats.pg_cache_misses; - array[9] = 0; // (uint64_t)ctx->stats.pg_cache_backfills; - array[10] = 0; // (uint64_t)ctx->stats.pg_cache_evictions; - array[11] = (uint64_t)__atomic_load_n(&ctx->stats.before_compress_bytes, __ATOMIC_RELAXED); // used - array[12] = (uint64_t)__atomic_load_n(&ctx->stats.after_compress_bytes, __ATOMIC_RELAXED); // used - array[13] = (uint64_t)__atomic_load_n(&ctx->stats.before_decompress_bytes, __ATOMIC_RELAXED); - array[14] = (uint64_t)__atomic_load_n(&ctx->stats.after_decompress_bytes, __ATOMIC_RELAXED); - array[15] = (uint64_t)__atomic_load_n(&ctx->stats.io_write_bytes, __ATOMIC_RELAXED); // used - array[16] = (uint64_t)__atomic_load_n(&ctx->stats.io_write_requests, __ATOMIC_RELAXED); // used - array[17] = (uint64_t)__atomic_load_n(&ctx->stats.io_read_bytes, __ATOMIC_RELAXED); - array[18] = (uint64_t)__atomic_load_n(&ctx->stats.io_read_requests, __ATOMIC_RELAXED); // used - array[19] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.io_write_extent_bytes, __ATOMIC_RELAXED); - array[20] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.io_write_extents, __ATOMIC_RELAXED); - array[21] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.io_read_extent_bytes, __ATOMIC_RELAXED); - array[22] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.io_read_extents, __ATOMIC_RELAXED); - array[23] = (uint64_t)__atomic_load_n(&ctx->stats.datafile_creations, __ATOMIC_RELAXED); - array[24] = (uint64_t)__atomic_load_n(&ctx->stats.datafile_deletions, __ATOMIC_RELAXED); - array[25] = (uint64_t)__atomic_load_n(&ctx->stats.journalfile_creations, __ATOMIC_RELAXED); - array[26] = (uint64_t)__atomic_load_n(&ctx->stats.journalfile_deletions, __ATOMIC_RELAXED); - array[27] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.page_cache_descriptors, __ATOMIC_RELAXED); - array[28] = (uint64_t)__atomic_load_n(&ctx->stats.io_errors, __ATOMIC_RELAXED); - array[29] = (uint64_t)__atomic_load_n(&ctx->stats.fs_errors, __ATOMIC_RELAXED); - array[30] = (uint64_t)__atomic_load_n(&global_io_errors, __ATOMIC_RELAXED); // used - array[31] = (uint64_t)__atomic_load_n(&global_fs_errors, __ATOMIC_RELAXED); // used - array[32] = (uint64_t)__atomic_load_n(&rrdeng_reserved_file_descriptors, __ATOMIC_RELAXED); // used - array[33] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.pg_cache_over_half_dirty_events, __ATOMIC_RELAXED); - array[34] = (uint64_t)__atomic_load_n(&global_pg_cache_over_half_dirty_events, __ATOMIC_RELAXED); // used - array[35] = 0; // (uint64_t)__atomic_load_n(&ctx->stats.flushing_pressure_page_deletions, __ATOMIC_RELAXED); - array[36] = (uint64_t)__atomic_load_n(&global_flushing_pressure_page_deletions, __ATOMIC_RELAXED); // used - array[37] = 0; //(uint64_t)pg_cache->active_descriptors; - - fatal_assert(RRDENG_NR_STATS == 38); -} - -static void rrdeng_populate_mrg(struct rrdengine_instance *ctx) { - uv_rwlock_rdlock(&ctx->datafiles.rwlock); - size_t datafiles = 0; - for(struct rrdengine_datafile *df = ctx->datafiles.first; df ;df = df->next) - datafiles++; - uv_rwlock_rdunlock(&ctx->datafiles.rwlock); - - ssize_t cpus = (ssize_t)get_netdata_cpus() / (ssize_t)storage_tiers; - if(cpus > (ssize_t)datafiles) - cpus = (ssize_t)datafiles; - - if(cpus > (ssize_t)libuv_worker_threads) - cpus = (ssize_t)libuv_worker_threads; - - if(cpus >= (ssize_t)get_netdata_cpus() / 2) - cpus = (ssize_t)(get_netdata_cpus() / 2 - 1); - - if(cpus < 1) - cpus = 1; - - netdata_log_info("DBENGINE: populating retention to MRG from %zu journal files of tier %d, using %zd threads...", datafiles, ctx->config.tier, cpus); - - if(datafiles > 2) { - struct rrdengine_datafile *datafile; - - datafile = ctx->datafiles.first->prev; - if(!(datafile->journalfile->v2.flags & JOURNALFILE_FLAG_IS_AVAILABLE)) - datafile = datafile->prev; - - if(datafile->journalfile->v2.flags & JOURNALFILE_FLAG_IS_AVAILABLE) { - journalfile_v2_populate_retention_to_mrg(ctx, datafile->journalfile); - datafile->populate_mrg.populated = true; - } - - datafile = ctx->datafiles.first; - if(datafile->journalfile->v2.flags & JOURNALFILE_FLAG_IS_AVAILABLE) { - journalfile_v2_populate_retention_to_mrg(ctx, datafile->journalfile); - datafile->populate_mrg.populated = true; - } - } - - ctx->loading.populate_mrg.size = cpus; - ctx->loading.populate_mrg.array = callocz(ctx->loading.populate_mrg.size, sizeof(struct completion)); - - for (size_t i = 0; i < ctx->loading.populate_mrg.size; i++) { - completion_init(&ctx->loading.populate_mrg.array[i]); - rrdeng_enq_cmd(ctx, RRDENG_OPCODE_CTX_POPULATE_MRG, NULL, &ctx->loading.populate_mrg.array[i], - STORAGE_PRIORITY_INTERNAL_DBENGINE, NULL, NULL); - } -} - -void rrdeng_readiness_wait(struct rrdengine_instance *ctx) { - for (size_t i = 0; i < ctx->loading.populate_mrg.size; i++) { - completion_wait_for(&ctx->loading.populate_mrg.array[i]); - completion_destroy(&ctx->loading.populate_mrg.array[i]); - } - - freez(ctx->loading.populate_mrg.array); - ctx->loading.populate_mrg.array = NULL; - ctx->loading.populate_mrg.size = 0; - - netdata_log_info("DBENGINE: tier %d is ready for data collection and queries", ctx->config.tier); -} - -bool rrdeng_is_legacy(STORAGE_INSTANCE *db_instance) { - struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance; - return ctx->config.legacy; -} - -void rrdeng_exit_mode(struct rrdengine_instance *ctx) { - __atomic_store_n(&ctx->quiesce.exit_mode, true, __ATOMIC_RELAXED); -} -/* - * Returns 0 on success, negative on error - */ -int rrdeng_init(struct rrdengine_instance **ctxp, const char *dbfiles_path, - unsigned disk_space_mb, size_t tier) { - struct rrdengine_instance *ctx; - uint32_t max_open_files; - - max_open_files = rlimit_nofile.rlim_cur / 4; - - /* reserve RRDENG_FD_BUDGET_PER_INSTANCE file descriptors for this instance */ - rrd_stat_atomic_add(&rrdeng_reserved_file_descriptors, RRDENG_FD_BUDGET_PER_INSTANCE); - if (rrdeng_reserved_file_descriptors > max_open_files) { - netdata_log_error( - "Exceeded the budget of available file descriptors (%u/%u), cannot create new dbengine instance.", - (unsigned)rrdeng_reserved_file_descriptors, - (unsigned)max_open_files); - - rrd_stat_atomic_add(&global_fs_errors, 1); - rrd_stat_atomic_add(&rrdeng_reserved_file_descriptors, -RRDENG_FD_BUDGET_PER_INSTANCE); - return UV_EMFILE; - } - - if(NULL == ctxp) { - ctx = multidb_ctx[tier]; - memset(ctx, 0, sizeof(*ctx)); - ctx->config.legacy = false; - } - else { - *ctxp = ctx = callocz(1, sizeof(*ctx)); - ctx->config.legacy = true; - } - - ctx->config.tier = (int)tier; - ctx->config.page_type = tier_page_type[tier]; - ctx->config.global_compress_alg = RRD_LZ4; - if (disk_space_mb < RRDENG_MIN_DISK_SPACE_MB) - disk_space_mb = RRDENG_MIN_DISK_SPACE_MB; - ctx->config.max_disk_space = disk_space_mb * 1048576LLU; - strncpyz(ctx->config.dbfiles_path, dbfiles_path, sizeof(ctx->config.dbfiles_path) - 1); - ctx->config.dbfiles_path[sizeof(ctx->config.dbfiles_path) - 1] = '\0'; - - ctx->atomic.transaction_id = 1; - ctx->quiesce.enabled = false; - - rw_spinlock_init(&ctx->njfv2idx.spinlock); - ctx->atomic.first_time_s = LONG_MAX; - - if (rrdeng_dbengine_spawn(ctx) && !init_rrd_files(ctx)) { - // success - we run this ctx too - rrdeng_populate_mrg(ctx); - return 0; - } - - if (ctx->config.legacy) { - freez(ctx); - if (ctxp) - *ctxp = NULL; - } - - rrd_stat_atomic_add(&rrdeng_reserved_file_descriptors, -RRDENG_FD_BUDGET_PER_INSTANCE); - return UV_EIO; -} - -size_t rrdeng_collectors_running(struct rrdengine_instance *ctx) { - return __atomic_load_n(&ctx->atomic.collectors_running, __ATOMIC_RELAXED); -} - -/* - * Returns 0 on success, 1 on error - */ -int rrdeng_exit(struct rrdengine_instance *ctx) { - if (NULL == ctx) - return 1; - - // FIXME - ktsaou - properly cleanup ctx - // 1. make sure all collectors are stopped - // 2. make new queries will not be accepted (this is quiesce that has already run) - // 3. flush this section of the main cache - // 4. then wait for completion - - bool logged = false; - size_t count = 10; - while(__atomic_load_n(&ctx->atomic.collectors_running, __ATOMIC_RELAXED) && count && !unittest_running) { - if(!logged) { - netdata_log_info("DBENGINE: waiting for collectors to finish on tier %d...", (ctx->config.legacy) ? -1 : ctx->config.tier); - logged = true; - } - sleep_usec(100 * USEC_PER_MS); - count--; - } - - netdata_log_info("DBENGINE: flushing main cache for tier %d", (ctx->config.legacy) ? -1 : ctx->config.tier); - pgc_flush_all_hot_and_dirty_pages(main_cache, (Word_t)ctx); - - netdata_log_info("DBENGINE: shutting down tier %d", (ctx->config.legacy) ? -1 : ctx->config.tier); - struct completion completion = {}; - completion_init(&completion); - rrdeng_enq_cmd(ctx, RRDENG_OPCODE_CTX_SHUTDOWN, NULL, &completion, STORAGE_PRIORITY_BEST_EFFORT, NULL, NULL); - completion_wait_for(&completion); - completion_destroy(&completion); - - finalize_rrd_files(ctx); - - if(ctx->config.legacy) - freez(ctx); - - rrd_stat_atomic_add(&rrdeng_reserved_file_descriptors, -RRDENG_FD_BUDGET_PER_INSTANCE); - return 0; -} - -void rrdeng_prepare_exit(struct rrdengine_instance *ctx) { - if (NULL == ctx) - return; - - // FIXME - ktsaou - properly cleanup ctx - // 1. make sure all collectors are stopped - - completion_init(&ctx->quiesce.completion); - rrdeng_enq_cmd(ctx, RRDENG_OPCODE_CTX_QUIESCE, NULL, NULL, STORAGE_PRIORITY_INTERNAL_DBENGINE, NULL, NULL); -} - -static void populate_v2_statistics(struct rrdengine_datafile *datafile, RRDENG_SIZE_STATS *stats) -{ - struct journal_v2_header *j2_header = journalfile_v2_data_acquire(datafile->journalfile, NULL, 0, 0); - void *data_start = (void *)j2_header; - - if(unlikely(!j2_header)) - return; - - stats->extents += j2_header->extent_count; - - unsigned entries; - struct journal_extent_list *extent_list = (void *) (data_start + j2_header->extent_offset); - for (entries = 0; entries < j2_header->extent_count; entries++) { - stats->extents_compressed_bytes += extent_list->datafile_size; - stats->extents_pages += extent_list->pages; - extent_list++; - } - - struct journal_metric_list *metric = (void *) (data_start + j2_header->metric_offset); - time_t journal_start_time_s = (time_t) (j2_header->start_time_ut / USEC_PER_SEC); - - stats->metrics += j2_header->metric_count; - for (entries = 0; entries < j2_header->metric_count; entries++) { - - struct journal_page_header *metric_list_header = (void *) (data_start + metric->page_offset); - stats->metrics_pages += metric_list_header->entries; - struct journal_page_list *descr = (void *) (data_start + metric->page_offset + sizeof(struct journal_page_header)); - for (uint32_t idx=0; idx < metric_list_header->entries; idx++) { - - time_t update_every_s; - - size_t points = descr->page_length / CTX_POINT_SIZE_BYTES(datafile->ctx); - - time_t start_time_s = journal_start_time_s + descr->delta_start_s; - time_t end_time_s = journal_start_time_s + descr->delta_end_s; - - if(likely(points > 1)) - update_every_s = (time_t) ((end_time_s - start_time_s) / (points - 1)); - else { - update_every_s = (time_t) (default_rrd_update_every * get_tier_grouping(datafile->ctx->config.tier)); - stats->single_point_pages++; - } - - time_t duration_s = (time_t)((end_time_s - start_time_s + update_every_s)); - - stats->pages_uncompressed_bytes += descr->page_length; - stats->pages_duration_secs += duration_s; - stats->points += points; - - stats->page_types[descr->type].pages++; - stats->page_types[descr->type].pages_uncompressed_bytes += descr->page_length; - stats->page_types[descr->type].pages_duration_secs += duration_s; - stats->page_types[descr->type].points += points; - - if(!stats->first_time_s || (start_time_s - update_every_s) < stats->first_time_s) - stats->first_time_s = (start_time_s - update_every_s); - - if(!stats->last_time_s || end_time_s > stats->last_time_s) - stats->last_time_s = end_time_s; - - descr++; - } - metric++; - } - - journalfile_v2_data_release(datafile->journalfile); -} - -RRDENG_SIZE_STATS rrdeng_size_statistics(struct rrdengine_instance *ctx) { - RRDENG_SIZE_STATS stats = { 0 }; - - uv_rwlock_rdlock(&ctx->datafiles.rwlock); - for(struct rrdengine_datafile *df = ctx->datafiles.first; df ;df = df->next) { - stats.datafiles++; - populate_v2_statistics(df, &stats); - } - uv_rwlock_rdunlock(&ctx->datafiles.rwlock); - - stats.currently_collected_metrics = __atomic_load_n(&ctx->atomic.collectors_running, __ATOMIC_RELAXED); - - internal_error(stats.metrics_pages != stats.extents_pages + stats.currently_collected_metrics, - "DBENGINE: metrics pages is %zu, but extents pages is %zu and API consumers is %zu", - stats.metrics_pages, stats.extents_pages, stats.currently_collected_metrics); - - stats.disk_space = ctx_current_disk_space_get(ctx); - stats.max_disk_space = ctx->config.max_disk_space; - - stats.database_retention_secs = (time_t)(stats.last_time_s - stats.first_time_s); - - if(stats.extents_pages) - stats.average_page_size_bytes = (double)stats.pages_uncompressed_bytes / (double)stats.extents_pages; - - if(stats.pages_uncompressed_bytes > 0) - stats.average_compression_savings = 100.0 - ((double)stats.extents_compressed_bytes * 100.0 / (double)stats.pages_uncompressed_bytes); - - if(stats.points) - stats.average_point_duration_secs = (double)stats.pages_duration_secs / (double)stats.points; - - if(stats.metrics) { - stats.average_metric_retention_secs = (double)stats.pages_duration_secs / (double)stats.metrics; - - if(stats.database_retention_secs) { - double metric_coverage = stats.average_metric_retention_secs / (double)stats.database_retention_secs; - double db_retention_days = (double)stats.database_retention_secs / 86400.0; - - stats.estimated_concurrently_collected_metrics = stats.metrics * metric_coverage; - - stats.ephemeral_metrics_per_day_percent = ((double)stats.metrics * 100.0 / (double)stats.estimated_concurrently_collected_metrics - 100.0) / (double)db_retention_days; - } - } - -// stats.sizeof_metric = 0; - stats.sizeof_datafile = struct_natural_alignment(sizeof(struct rrdengine_datafile)) + struct_natural_alignment(sizeof(struct rrdengine_journalfile)); - stats.sizeof_page_in_cache = 0; // struct_natural_alignment(sizeof(struct page_cache_descr)); - stats.sizeof_point_data = page_type_size[ctx->config.page_type]; - stats.sizeof_page_data = tier_page_size[ctx->config.tier]; - stats.pages_per_extent = rrdeng_pages_per_extent; - -// stats.sizeof_metric_in_index = 40; -// stats.sizeof_page_in_index = 24; - - stats.default_granularity_secs = (size_t)default_rrd_update_every * get_tier_grouping(ctx->config.tier); - - return stats; -} - -struct rrdeng_cache_efficiency_stats rrdeng_get_cache_efficiency_stats(void) { - // FIXME - make cache efficiency stats atomic - return rrdeng_cache_efficiency_stats; -} |