/*****************************************************************************
- * RRDtool 1.0.33 Copyright Tobias Oetiker, 1997, 1998, 1999
+ * RRDtool 1.2rc6 Copyright by Tobi Oetiker, 1997-2005
*****************************************************************************
* rrd_format.h RRD Database Format header
*****************************************************************************/
*****************************************************************************/
#define RRD_COOKIE "RRD"
-#define RRD_VERSION "0001"
+/* #define RRD_VERSION "0002" */
+/* changed because microsecond precision requires another field */
+#define RRD_VERSION "0003"
#define FLOAT_COOKIE 8.642135E130
-#if defined(WIN32)
-#define DNAN ((double)fmod(0.0,0.0))
-#define DINF ((double)log(0.0))
-#else
-
-#define DNAN ((double)(0.0/0.0)) /* we use a DNAN to
- * represent the UNKNOWN
- * */
-#define DINF ((double)(1.0/0.0)) /* we use a DINF to
- * represent a value at the upper or
- * lower border of the graph ...
- * */
-#endif
+#include "rrd_nan_inf.h"
typedef union unival {
unsigned long u_cnt;
enum dst_en { DST_COUNTER=0, /* data source types available */
DST_ABSOLUTE,
DST_GAUGE,
- DST_DERIVE};
+ DST_DERIVE,
+ DST_CDEF};
enum ds_param_en { DS_mrhb_cnt=0, /* minimum required heartbeat. A
* data source must provide input at
* least every ds_mrhb seconds,
* otherwise it is regarded dead and
* will be set to UNKNOWN */
- DS_min_val, /* the processed input of a ds must */
- DS_max_val }; /* be between max_val and min_val
+ DS_min_val, /* the processed input of a ds must */
+ DS_max_val, /* be between max_val and min_val
* both can be set to UNKNOWN if you
* do not care. Data outside the limits
* set to UNKNOWN */
+ DS_cdef = DS_mrhb_cnt}; /* pointer to encoded rpn
+ * expression only applies to DST_CDEF */
/* The magic number here is one less than DS_NAM_SIZE */
#define DS_NAM_FMT "%19[a-zA-Z0-9_-]"
enum cf_en { CF_AVERAGE=0, /* data consolidation functions */
CF_MINIMUM,
CF_MAXIMUM,
- CF_LAST};
-
-enum rra_par_en { RRA_cdp_xff_val=0}; /* what part of the consolidated
- datapoint may be unknown, while
- still a valid entry in goes into the rra */
+ CF_LAST,
+ CF_HWPREDICT,
+ /* An array of predictions using the seasonal
+ * Holt-Winters algorithm. Requires an RRA of type
+ * CF_SEASONAL for this data source. */
+ CF_SEASONAL,
+ /* An array of seasonal effects. Requires an RRA of
+ * type CF_HWPREDICT for this data source. */
+ CF_DEVPREDICT,
+ /* An array of deviation predictions based upon
+ * smoothed seasonal deviations. Requires an RRA of
+ * type CF_DEVSEASONAL for this data source. */
+ CF_DEVSEASONAL,
+ /* An array of smoothed seasonal deviations. Requires
+ * an RRA of type CF_HWPREDICT for this data source.
+ * */
+ CF_FAILURES};
+ /* A binary array of failure indicators: 1 indicates
+ * that the number of violations in the prescribed
+ * window exceeded the prescribed threshold. */
+
+#define MAX_RRA_PAR_EN 10
+enum rra_par_en { RRA_cdp_xff_val=0, /* what part of the consolidated
+ * datapoint must be known, to produce a
+ * valid entry in the rra */
+ RRA_hw_alpha,
+ /* exponential smoothing parameter for the intercept in
+ * the Holt-Winters prediction algorithm. */
+ RRA_hw_beta,
+ /* exponential smoothing parameter for the slope in
+ * the Holt-Winters prediction algorithm. */
+ RRA_dependent_rra_idx,
+ /* For CF_HWPREDICT: index of the RRA with the seasonal
+ * effects of the Holt-Winters algorithm (of type
+ * CF_SEASONAL).
+ * For CF_DEVPREDICT: index of the RRA with the seasonal
+ * deviation predictions (of type CF_DEVSEASONAL).
+ * For CF_SEASONAL: index of the RRA with the Holt-Winters
+ * intercept and slope coefficient (of type CF_HWPREDICT).
+ * For CF_DEVSEASONAL: index of the RRA with the
+ * Holt-Winters prediction (of type CF_HWPREDICT).
+ * For CF_FAILURES: index of the CF_DEVSEASONAL array.
+ * */
+ RRA_seasonal_smooth_idx,
+ /* For CF_SEASONAL and CF_DEVSEASONAL:
+ * an integer between 0 and row_count - 1 which
+ * is index in the seasonal cycle for applying
+ * the period smoother. */
+ RRA_failure_threshold,
+ /* For CF_FAILURES, number of violations within the last
+ * window required to mark a failure. */
+ RRA_seasonal_gamma = RRA_hw_alpha,
+ /* exponential smoothing parameter for seasonal effects.
+ * */
+ RRA_delta_pos = RRA_hw_alpha,
+ RRA_delta_neg = RRA_hw_beta,
+ /* confidence bound scaling parameters for the
+ * the FAILURES RRA. */
+ RRA_window_len = RRA_seasonal_smooth_idx};
+ /* For CF_FAILURES, the length of the window for measuring
+ * failures. */
#define CF_NAM_FMT "%19[A-Z]"
#define CF_NAM_SIZE 20
unsigned long pdp_cnt; /* how many primary data points are
* required for a consolidated data
* point?*/
- unival par[10]; /* index see rra_param_en */
+ unival par[MAX_RRA_PAR_EN]; /* index see rra_param_en */
} rra_def_t;
typedef struct live_head_t {
time_t last_up; /* when was rrd last updated */
+ long last_up_usec; /* micro seconds part of the
+ update timestamp. Always >= 0 */
} live_head_t;
/****************************************************************************
* POS 6: cdp_prep_t (* rra_cnt * ds_cnt ) data prep area for cdp values
****************************************************************************/
-enum cdp_par_en { CDP_val=0, /* the base_interval is always an
- * average */
- CDP_unkn_pdp_cnt }; /* how many unknown pdp were
- * integrated. This and the cdp_xff
- will decide if this is going to
- be a UNKNOWN or a valid value */
+#define MAX_CDP_PAR_EN 10
+#define MAX_CDP_FAILURES_IDX 8
+/* max CDP scratch entries avail to record violations for a FAILURES RRA */
+#define MAX_FAILURES_WINDOW_LEN 28
+enum cdp_par_en { CDP_val=0,
+ /* the base_interval is always an
+ * average */
+ CDP_unkn_pdp_cnt,
+ /* how many unknown pdp were
+ * integrated. This and the cdp_xff
+ * will decide if this is going to
+ * be a UNKNOWN or a valid value */
+ CDP_hw_intercept,
+ /* Current intercept coefficient for the Holt-Winters
+ * prediction algorithm. */
+ CDP_hw_last_intercept,
+ /* Last iteration intercept coefficient for the Holt-Winters
+ * prediction algorihtm. */
+ CDP_hw_slope,
+ /* Current slope coefficient for the Holt-Winters
+ * prediction algorithm. */
+ CDP_hw_last_slope,
+ /* Last iteration slope coeffient. */
+ CDP_null_count,
+ /* Number of sequential Unknown (DNAN) values + 1 preceding
+ * the current prediction.
+ * */
+ CDP_last_null_count,
+ /* Last iteration count of Unknown (DNAN) values. */
+ CDP_primary_val = 8,
+ /* optimization for bulk updates: the value of the first CDP
+ * value to be written in the bulk update. */
+ CDP_secondary_val = 9,
+ /* optimization for bulk updates: the value of subsequent
+ * CDP values to be written in the bulk update. */
+ CDP_hw_seasonal = CDP_hw_intercept,
+ /* Current seasonal coefficient for the Holt-Winters
+ * prediction algorithm. This is stored in CDP prep to avoid
+ * redundant seek operations. */
+ CDP_hw_last_seasonal = CDP_hw_last_intercept,
+ /* Last iteration seasonal coeffient. */
+ CDP_seasonal_deviation = CDP_hw_intercept,
+ CDP_last_seasonal_deviation = CDP_hw_last_intercept,
+ CDP_init_seasonal = CDP_null_count};
+ /* init_seasonal is a flag which when > 0, forces smoothing updates
+ * to occur when rra_ptr.cur_row == 0 */
typedef struct cdp_prep_t{
- unival scratch[10]; /* contents according to cdp_par_en *
+ unival scratch[MAX_CDP_PAR_EN];
+ /* contents according to cdp_par_en *
* init state should be NAN */
} cdp_prep_t;
* Consolidated Data Points organized in Round Robin Archives.
****************************************************************************
****************************************************************************
-
+
*RRA 0
(0,0) .................... ( ds_cnt -1 , 0)
.
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