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Diffstat (limited to 'database/engine/rrdengine.h')
| -rw-r--r-- | database/engine/rrdengine.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/database/engine/rrdengine.h b/database/engine/rrdengine.h new file mode 100644 index 0000000..87af04b --- /dev/null +++ b/database/engine/rrdengine.h @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_RRDENGINE_H +#define NETDATA_RRDENGINE_H + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif +#include <fcntl.h> +#include <lz4.h> +#include <Judy.h> +#include <openssl/sha.h> +#include <openssl/evp.h> +#include "../../daemon/common.h" +#include "../rrd.h" +#include "rrddiskprotocol.h" +#include "rrdenginelib.h" +#include "datafile.h" +#include "journalfile.h" +#include "metadata_log/metadatalog.h" +#include "rrdengineapi.h" +#include "pagecache.h" +#include "rrdenglocking.h" + +#ifdef NETDATA_RRD_INTERNALS + +#endif /* NETDATA_RRD_INTERNALS */ + +/* Forward declerations */ +struct rrdengine_instance; + +#define MAX_PAGES_PER_EXTENT (64) /* TODO: can go higher only when journal supports bigger than 4KiB transactions */ + +#define RRDENG_FILE_NUMBER_SCAN_TMPL "%1u-%10u" +#define RRDENG_FILE_NUMBER_PRINT_TMPL "%1.1u-%10.10u" + + +typedef enum { + RRDENGINE_STATUS_UNINITIALIZED = 0, + RRDENGINE_STATUS_INITIALIZING, + RRDENGINE_STATUS_INITIALIZED +} rrdengine_state_t; + +enum rrdeng_opcode { + /* can be used to return empty status or flush the command queue */ + RRDENG_NOOP = 0, + + RRDENG_READ_PAGE, + RRDENG_READ_EXTENT, + RRDENG_COMMIT_PAGE, + RRDENG_FLUSH_PAGES, + RRDENG_SHUTDOWN, + RRDENG_INVALIDATE_OLDEST_MEMORY_PAGE, + RRDENG_QUIESCE, + + RRDENG_MAX_OPCODE +}; + +struct rrdeng_cmd { + enum rrdeng_opcode opcode; + union { + struct rrdeng_read_page { + struct rrdeng_page_descr *page_cache_descr; + } read_page; + struct rrdeng_read_extent { + struct rrdeng_page_descr *page_cache_descr[MAX_PAGES_PER_EXTENT]; + int page_count; + } read_extent; + struct completion *completion; + }; +}; + +#define RRDENG_CMD_Q_MAX_SIZE (2048) + +struct rrdeng_cmdqueue { + unsigned head, tail; + struct rrdeng_cmd cmd_array[RRDENG_CMD_Q_MAX_SIZE]; +}; + +struct extent_io_descriptor { + uv_fs_t req; + uv_buf_t iov; + void *buf; + uint64_t pos; + unsigned bytes; + struct completion *completion; + unsigned descr_count; + int release_descr; + struct rrdeng_page_descr *descr_array[MAX_PAGES_PER_EXTENT]; + Word_t descr_commit_idx_array[MAX_PAGES_PER_EXTENT]; + struct extent_io_descriptor *next; /* multiple requests to be served by the same cached extent */ +}; + +struct generic_io_descriptor { + uv_fs_t req; + uv_buf_t iov; + void *buf; + uint64_t pos; + unsigned bytes; + struct completion *completion; +}; + +struct extent_cache_element { + struct extent_info *extent; /* The ABA problem is avoided with the help of fileno below */ + unsigned fileno; + struct extent_cache_element *prev; /* LRU */ + struct extent_cache_element *next; /* LRU */ + struct extent_io_descriptor *inflight_io_descr; /* I/O descriptor for in-flight extent */ + uint8_t pages[MAX_PAGES_PER_EXTENT * RRDENG_BLOCK_SIZE]; +}; + +#define MAX_CACHED_EXTENTS 16 /* cannot be over 32 to fit in 32-bit architectures */ + +/* Initialize by setting the structure to zero */ +struct extent_cache { + struct extent_cache_element extent_array[MAX_CACHED_EXTENTS]; + unsigned allocation_bitmap; /* 1 if the corresponding position in the extent_array is allocated */ + unsigned inflight_bitmap; /* 1 if the corresponding position in the extent_array is waiting for I/O */ + + struct extent_cache_element *replaceQ_head; /* LRU */ + struct extent_cache_element *replaceQ_tail; /* MRU */ +}; + +struct rrdengine_worker_config { + struct rrdengine_instance *ctx; + + uv_thread_t thread; + uv_loop_t* loop; + uv_async_t async; + + /* file deletion thread */ + uv_thread_t *now_deleting_files; + unsigned long cleanup_thread_deleting_files; /* set to 0 when now_deleting_files is still running */ + + /* dirty page deletion thread */ + uv_thread_t *now_invalidating_dirty_pages; + /* set to 0 when now_invalidating_dirty_pages is still running */ + unsigned long cleanup_thread_invalidating_dirty_pages; + unsigned inflight_dirty_pages; + + /* FIFO command queue */ + uv_mutex_t cmd_mutex; + uv_cond_t cmd_cond; + volatile unsigned queue_size; + struct rrdeng_cmdqueue cmd_queue; + + struct extent_cache xt_cache; + + int error; +}; + +/* + * Debug statistics not used by code logic. + * They only describe operations since DB engine instance load time. + */ +struct rrdengine_statistics { + rrdeng_stats_t metric_API_producers; + rrdeng_stats_t metric_API_consumers; + rrdeng_stats_t pg_cache_insertions; + rrdeng_stats_t pg_cache_deletions; + rrdeng_stats_t pg_cache_hits; + rrdeng_stats_t pg_cache_misses; + rrdeng_stats_t pg_cache_backfills; + rrdeng_stats_t pg_cache_evictions; + rrdeng_stats_t before_decompress_bytes; + rrdeng_stats_t after_decompress_bytes; + rrdeng_stats_t before_compress_bytes; + rrdeng_stats_t after_compress_bytes; + rrdeng_stats_t io_write_bytes; + rrdeng_stats_t io_write_requests; + rrdeng_stats_t io_read_bytes; + rrdeng_stats_t io_read_requests; + rrdeng_stats_t io_write_extent_bytes; + rrdeng_stats_t io_write_extents; + rrdeng_stats_t io_read_extent_bytes; + rrdeng_stats_t io_read_extents; + rrdeng_stats_t datafile_creations; + rrdeng_stats_t datafile_deletions; + rrdeng_stats_t journalfile_creations; + rrdeng_stats_t journalfile_deletions; + rrdeng_stats_t page_cache_descriptors; + rrdeng_stats_t io_errors; + rrdeng_stats_t fs_errors; + rrdeng_stats_t pg_cache_over_half_dirty_events; + rrdeng_stats_t flushing_pressure_page_deletions; +}; + +/* I/O errors global counter */ +extern rrdeng_stats_t global_io_errors; +/* File-System errors global counter */ +extern rrdeng_stats_t global_fs_errors; +/* number of File-Descriptors that have been reserved by dbengine */ +extern rrdeng_stats_t rrdeng_reserved_file_descriptors; +/* inability to flush global counters */ +extern rrdeng_stats_t global_pg_cache_over_half_dirty_events; +extern rrdeng_stats_t global_flushing_pressure_page_deletions; /* number of deleted pages */ + +#define NO_QUIESCE (0) /* initial state when all operations function normally */ +#define SET_QUIESCE (1) /* set it before shutting down the instance, quiesce long running operations */ +#define QUIESCED (2) /* is set after all threads have finished running */ + +struct rrdengine_instance { + struct metalog_instance *metalog_ctx; + struct rrdengine_worker_config worker_config; + struct completion rrdengine_completion; + struct page_cache pg_cache; + uint8_t drop_metrics_under_page_cache_pressure; /* boolean */ + uint8_t global_compress_alg; + struct transaction_commit_log commit_log; + struct rrdengine_datafile_list datafiles; + RRDHOST *host; /* the legacy host, or NULL for multi-host DB */ + char dbfiles_path[FILENAME_MAX + 1]; + char machine_guid[GUID_LEN + 1]; /* the unique ID of the corresponding host, or localhost for multihost DB */ + uint64_t disk_space; + uint64_t max_disk_space; + unsigned last_fileno; /* newest index of datafile and journalfile */ + unsigned long max_cache_pages; + unsigned long cache_pages_low_watermark; + unsigned long metric_API_max_producers; + + uint8_t quiesce; /* set to SET_QUIESCE before shutdown of the engine */ + + struct rrdengine_statistics stats; +}; + +extern int init_rrd_files(struct rrdengine_instance *ctx); +extern void finalize_rrd_files(struct rrdengine_instance *ctx); +extern void rrdeng_test_quota(struct rrdengine_worker_config* wc); +extern void rrdeng_worker(void* arg); +extern void rrdeng_enq_cmd(struct rrdengine_worker_config* wc, struct rrdeng_cmd *cmd); +extern struct rrdeng_cmd rrdeng_deq_cmd(struct rrdengine_worker_config* wc); + +#endif /* NETDATA_RRDENGINE_H */
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