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#ifndef NETDATA_RRD_H
#define NETDATA_RRD_H 1
#define UPDATE_EVERY 1
#define UPDATE_EVERY_MAX 3600
extern int rrd_update_every;
#define RRD_DEFAULT_HISTORY_ENTRIES 3600
#define RRD_HISTORY_ENTRIES_MAX (86400*10)
extern int rrd_default_history_entries;
// time in seconds to delete unupdated dimensions
// set to zero to disable this feature
extern int rrd_delete_unupdated_dimensions;
#define RRD_ID_LENGTH_MAX 1024
#define RRDSET_MAGIC "NETDATA RRD SET FILE V018"
#define RRDDIMENSION_MAGIC "NETDATA RRD DIMENSION FILE V018"
typedef long long total_number;
#define TOTAL_NUMBER_FORMAT "%lld"
// ----------------------------------------------------------------------------
// chart types
#define RRDSET_TYPE_LINE_NAME "line"
#define RRDSET_TYPE_AREA_NAME "area"
#define RRDSET_TYPE_STACKED_NAME "stacked"
#define RRDSET_TYPE_LINE 0
#define RRDSET_TYPE_AREA 1
#define RRDSET_TYPE_STACKED 2
int rrdset_type_id(const char *name);
const char *rrdset_type_name(int chart_type);
// ----------------------------------------------------------------------------
// memory mode
#define RRD_MEMORY_MODE_RAM_NAME "ram"
#define RRD_MEMORY_MODE_MAP_NAME "map"
#define RRD_MEMORY_MODE_SAVE_NAME "save"
#define RRD_MEMORY_MODE_RAM 0
#define RRD_MEMORY_MODE_MAP 1
#define RRD_MEMORY_MODE_SAVE 2
extern int rrd_memory_mode;
extern const char *rrd_memory_mode_name(int id);
extern int rrd_memory_mode_id(const char *name);
// ----------------------------------------------------------------------------
// algorithms types
#define RRDDIM_ABSOLUTE_NAME "absolute"
#define RRDDIM_INCREMENTAL_NAME "incremental"
#define RRDDIM_PCENT_OVER_DIFF_TOTAL_NAME "percentage-of-incremental-row"
#define RRDDIM_PCENT_OVER_ROW_TOTAL_NAME "percentage-of-absolute-row"
#define RRDDIM_ABSOLUTE 0
#define RRDDIM_INCREMENTAL 1
#define RRDDIM_PCENT_OVER_DIFF_TOTAL 2
#define RRDDIM_PCENT_OVER_ROW_TOTAL 3
extern int rrddim_algorithm_id(const char *name);
extern const char *rrddim_algorithm_name(int chart_type);
// ----------------------------------------------------------------------------
// flags
#define RRDDIM_FLAG_HIDDEN 0x00000001 // this dimension will not be offered to callers
#define RRDDIM_FLAG_DONT_DETECT_RESETS_OR_OVERFLOWS 0x00000002 // do not offer RESET or OVERFLOW info to callers
// ----------------------------------------------------------------------------
// RRD CONTEXT
struct rrdcontext {
avl avl;
const char *id;
uint32_t hash;
size_t use_count;
avl_tree_lock variables_root_index;
};
typedef struct rrdcontext RRDCONTEXT;
// ----------------------------------------------------------------------------
// RRD DIMENSION
struct rrddim {
// ------------------------------------------------------------------------
// binary indexing structures
avl avl; // the binary index - this has to be first member!
// ------------------------------------------------------------------------
// the dimension definition
char id[RRD_ID_LENGTH_MAX + 1]; // the id of this dimension (for internal identification)
const char *name; // the name of this dimension (as presented to user)
// this is a pointer to the config structure
// since the config always has a higher priority
// (the user overwrites the name of the charts)
int algorithm; // the algorithm that is applied to add new collected values
long multiplier; // the multiplier of the collected values
long divisor; // the divider of the collected values
int mapped; // if set to non zero, this dimension is mapped to a file
// ------------------------------------------------------------------------
// members for temporary data we need for calculations
uint32_t hash; // a simple hash of the id, to speed up searching / indexing
// instead of strcmp() every item in the binary index
// we first compare the hashes
// FIXME
// we need the hash_name too!
uint32_t flags;
char cache_filename[FILENAME_MAX+1]; // the filename we load/save from/to this set
unsigned long counter; // the number of times we added values to this rrdim
int updated; // set to 0 after each calculation, to 1 after each collected value
// we use this to detect that a dimension is not updated
struct timeval last_collected_time; // when was this dimension last updated
// this is actual date time we updated the last_collected_value
// THIS IS DIFFERENT FROM THE SAME MEMBER OF RRDSET
calculated_number calculated_value; // the current calculated value, after applying the algorithm
calculated_number last_calculated_value; // the last calculated value
collected_number collected_value; // the current value, as collected
collected_number last_collected_value; // the last value that was collected
// the *_volume members are used to calculate the accuracy of the rounding done by the
// storage number - they are printed to debug.log when debug is enabled for a set.
calculated_number collected_volume; // the sum of all collected values so far
calculated_number stored_volume; // the sum of all stored values so far
struct rrddim *next; // linking of dimensions within the same data set
struct rrdset *rrdset;
// ------------------------------------------------------------------------
// members for checking the data when loading from disk
long entries; // how many entries this dimension has in ram
// this is the same to the entries of the data set
// we set it here, to check the data when we load it from disk.
int update_every; // every how many seconds is this updated
unsigned long memsize; // the memory allocated for this dimension
char magic[sizeof(RRDDIMENSION_MAGIC) + 1]; // a string to be saved, used to identify our data file
struct rrddimvar *variables;
// ------------------------------------------------------------------------
// the values stored in this dimension, using our floating point numbers
storage_number values[]; // the array of values - THIS HAS TO BE THE LAST MEMBER
};
typedef struct rrddim RRDDIM;
// ----------------------------------------------------------------------------
// RRDSET
struct rrdset {
// ------------------------------------------------------------------------
// binary indexing structures
avl avl; // the index, with key the id - this has to be first!
avl avlname; // the index, with key the name
// ------------------------------------------------------------------------
// the set configuration
char id[RRD_ID_LENGTH_MAX + 1]; // id of the data set
const char *name; // the name of this dimension (as presented to user)
// this is a pointer to the config structure
// since the config always has a higher priority
// (the user overwrites the name of the charts)
char *type; // the type of graph RRD_TYPE_* (a category, for determining graphing options)
char *family; // grouping sets under the same family
char *context; // the template of this data set
char *title; // title shown to user
char *units; // units of measurement
int chart_type;
int update_every; // every how many seconds is this updated?
long entries; // total number of entries in the data set
long current_entry; // the entry that is currently being updated
// it goes around in a round-robin fashion
int enabled;
int gap_when_lost_iterations_above; // after how many lost iterations a gap should be stored
// netdata will interpolate values for gaps lower than this
long priority;
int isdetail; // if set, the data set should be considered as a detail of another
// (the master data set should be the one that has the same family and is not detail)
// ------------------------------------------------------------------------
// members for temporary data we need for calculations
int mapped; // if set to 1, this is memory mapped
int debug;
char *cache_dir; // the directory to store dimensions
char cache_filename[FILENAME_MAX+1]; // the filename to store this set
pthread_rwlock_t rwlock;
unsigned long counter; // the number of times we added values to this rrd
unsigned long counter_done; // the number of times we added values to this rrd
uint32_t hash; // a simple hash on the id, to speed up searching
// we first compare hashes, and only if the hashes are equal we do string comparisons
uint32_t hash_name; // a simple hash on the name
unsigned long long usec_since_last_update; // the time in microseconds since the last collection of data
struct timeval last_updated; // when this data set was last updated (updated every time the rrd_stats_done() function)
struct timeval last_collected_time; // when did this data set last collected values
total_number collected_total; // used internally to calculate percentages
total_number last_collected_total; // used internally to calculate percentages
RRDCONTEXT *rrdcontext;
struct rrdhost *rrdhost;
struct rrdset *next; // linking of rrdsets
// ------------------------------------------------------------------------
// local variables
avl_tree_lock variables_root_index;
RRDSETVAR *variables;
RRDCALC *calculations;
// ------------------------------------------------------------------------
// members for checking the data when loading from disk
unsigned long memsize; // how much mem we have allocated for this (without dimensions)
char magic[sizeof(RRDSET_MAGIC) + 1]; // our magic
// ------------------------------------------------------------------------
// the dimensions
avl_tree_lock dimensions_index; // the root of the dimensions index
RRDDIM *dimensions; // the actual data for every dimension
};
typedef struct rrdset RRDSET;
// ----------------------------------------------------------------------------
// RRD HOST
struct rrdhost {
avl avl;
char *hostname;
RRDSET *rrdset_root;
pthread_rwlock_t rrdset_root_rwlock;
avl_tree_lock rrdset_root_index;
avl_tree_lock rrdset_root_index_name;
avl_tree_lock rrdcontext_root_index;
avl_tree_lock variables_root_index;
// all RRDCALCs are primarily allocated and linked here
// RRDCALCs may be linked to charts at any point
// (charts may or may not exist when these are loaded)
RRDCALC *calculations;
// all variable references are linked here
// RRDVARs may be free'd, so every time this happens
// we need to find all their references and invalidate them
VARIABLE *references;
};
typedef struct rrdhost RRDHOST;
extern RRDHOST localhost;
// ----------------------------------------------------------------------------
// RRD SET functions
extern char *rrdset_strncpyz_name(char *to, const char *from, size_t length);
extern void rrdset_set_name(RRDSET *st, const char *name);
extern char *rrdset_cache_dir(const char *id);
extern void rrdset_reset(RRDSET *st);
extern RRDSET *rrdset_create(const char *type
, const char *id
, const char *name
, const char *family
, const char *context
, const char *title
, const char *units
, long priority
, int update_every
, int chart_type);
extern void rrdset_free_all(void);
extern void rrdset_save_all(void);
extern RRDSET *rrdset_find(const char *id);
extern RRDSET *rrdset_find_bytype(const char *type, const char *id);
extern RRDSET *rrdset_find_byname(const char *name);
extern void rrdset_next_usec(RRDSET *st, unsigned long long microseconds);
extern void rrdset_next(RRDSET *st);
extern void rrdset_next_plugins(RRDSET *st);
extern unsigned long long rrdset_done(RRDSET *st);
// get the total duration in seconds of the round robin database
#define rrdset_duration(st) ((time_t)( (((st)->counter >= ((unsigned long)(st)->entries))?(unsigned long)(st)->entries:(st)->counter) * (st)->update_every ))
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