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Diffstat (limited to '')
| -rw-r--r-- | web/api/formatters/ssv/Makefile.am | 8 | ||||
| -rw-r--r-- | web/api/formatters/ssv/README.md | 59 | ||||
| -rw-r--r-- | web/api/formatters/ssv/ssv.c | 45 | ||||
| -rw-r--r-- | web/api/formatters/ssv/ssv.h | 10 |
4 files changed, 122 insertions, 0 deletions
diff --git a/web/api/formatters/ssv/Makefile.am b/web/api/formatters/ssv/Makefile.am new file mode 100644 index 0000000..161784b --- /dev/null +++ b/web/api/formatters/ssv/Makefile.am @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-3.0-or-later + +AUTOMAKE_OPTIONS = subdir-objects +MAINTAINERCLEANFILES = $(srcdir)/Makefile.in + +dist_noinst_DATA = \ + README.md \ + $(NULL) diff --git a/web/api/formatters/ssv/README.md b/web/api/formatters/ssv/README.md new file mode 100644 index 0000000..d439949 --- /dev/null +++ b/web/api/formatters/ssv/README.md @@ -0,0 +1,59 @@ +<!-- +title: "SSV formatter" +custom_edit_url: https://github.com/netdata/netdata/edit/master/web/api/formatters/ssv/README.md +--> + +# SSV formatter + +The SSV formatter sums all dimensions in [results of database queries](/web/api/queries/README.md) +to a single value and returns a list of such values showing how it changes through time. + +It supports the following formats: + +| format | content type | description | +|:----:|:----------:|:----------| +| `ssv` | text/plain | a space separated list of values | +| `ssvcomma` | text/plain | a comma separated list of values | +| `array` | application/json | a JSON array | + +The SSV formatter respects the following API `&options=`: + +| option | supported | description | +| :----:|:-------:|:----------| +| `nonzero` | yes | to return only the dimensions that have at least a non-zero value | +| `flip` | yes | to return the numbers older to newer (the default is newer to older) | +| `percent` | yes | to replace all values with their percentage over the row total | +| `abs` | yes | to turn all values positive, before using them | +| `min2max` | yes | to return the delta from the minimum value to the maximum value (across dimensions) | + +## Examples + +Get the average system CPU utilization of the last hour, in 6 values (one every 10 minutes): + +```bash +# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=system.cpu&format=ssv&after=-3600&points=6&group=average' +1.741352 1.6800467 1.769411 1.6761112 1.629862 1.6807968 +``` + +--- + +Get the total mysql bandwidth (in + out) for the last hour, in 6 values (one every 10 minutes): + +Netdata returns bandwidth in `kilobits`. + +```bash +# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=mysql_local.net&format=ssvcomma&after=-3600&points=6&group=sum&options=abs' +72618.7936215,72618.778889,72618.788084,72618.9195918,72618.7760612,72618.6712421 +``` + +--- + +Get the web server max connections for the last hour, in 12 values (one every 5 minutes) +in a JSON array: + +```bash +# curl -Ss 'https://registry.my-netdata.io/api/v1/data?chart=nginx_local.connections&format=array&after=-3600&points=12&group=max' +[278,258,268,239,259,260,243,266,278,318,264,258] +``` + +[](<>) diff --git a/web/api/formatters/ssv/ssv.c b/web/api/formatters/ssv/ssv.c new file mode 100644 index 0000000..eeba028 --- /dev/null +++ b/web/api/formatters/ssv/ssv.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "ssv.h" + +void rrdr2ssv(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, const char *prefix, const char *separator, const char *suffix) { + //info("RRD2SSV(): %s: BEGIN", r->st->id); + long i; + + buffer_strcat(wb, prefix); + long start = 0, end = rrdr_rows(r), step = 1; + if(!(options & RRDR_OPTION_REVERSED)) { + start = rrdr_rows(r) - 1; + end = -1; + step = -1; + } + + // for each line in the array + for(i = start; i != end ;i += step) { + int all_values_are_null = 0; + calculated_number v = rrdr2value(r, i, options, &all_values_are_null); + + if(likely(i != start)) { + if(r->min > v) r->min = v; + if(r->max < v) r->max = v; + } + else { + r->min = v; + r->max = v; + } + + if(likely(i != start)) + buffer_strcat(wb, separator); + + if(all_values_are_null) { + if(options & RRDR_OPTION_NULL2ZERO) + buffer_strcat(wb, "0"); + else + buffer_strcat(wb, "null"); + } + else + buffer_rrd_value(wb, v); + } + buffer_strcat(wb, suffix); + //info("RRD2SSV(): %s: END", r->st->id); +} diff --git a/web/api/formatters/ssv/ssv.h b/web/api/formatters/ssv/ssv.h new file mode 100644 index 0000000..6963dcf --- /dev/null +++ b/web/api/formatters/ssv/ssv.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_API_FORMATTER_SSV_H +#define NETDATA_API_FORMATTER_SSV_H + +#include "../rrd2json.h" + +extern void rrdr2ssv(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, const char *prefix, const char *separator, const char *suffix); + +#endif //NETDATA_API_FORMATTER_SSV_H |