New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 65 insertions, 372 deletions

diff --git a/src/backends.c b/backends/backends.c
index 1360638f2..53a9a2395 100644
--- a/src/backends.c
+++ b/backends/backends.c
@@ -1,4 +1,7 @@
-#include "common.h"
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#define BACKENDS_INTERNALS
+#include "backends.h"
 
 // ----------------------------------------------------------------------------
 // How backends work in netdata:
@@ -22,15 +25,14 @@
 // 5. repeats the above forever.
 //
 
-const char *backend_prefix = "netdata";
-int backend_send_names = 1;
-int backend_update_every = 10;
-uint32_t backend_options = BACKEND_SOURCE_DATA_AVERAGE;
+const char *global_backend_prefix = "netdata";
+int global_backend_update_every = 10;
+BACKEND_OPTIONS global_backend_options = BACKEND_SOURCE_DATA_AVERAGE | BACKEND_OPTION_SEND_NAMES;
 
 // ----------------------------------------------------------------------------
 // helper functions for backends
 
-static inline size_t backend_name_copy(char *d, const char *s, size_t usable) {
+size_t backend_name_copy(char *d, const char *s, size_t usable) {
     size_t n;
 
     for(n = 0; *s && n < usable ; d++, s++, n++) {
@@ -47,16 +49,17 @@ static inline size_t backend_name_copy(char *d, const char *s, size_t usable) {
 // calculate the SUM or AVERAGE of a dimension, for any timeframe
 // may return NAN if the database does not have any value in the give timeframe
 
-inline calculated_number backend_calculate_value_from_stored_data(
+calculated_number backend_calculate_value_from_stored_data(
           RRDSET *st                // the chart
         , RRDDIM *rd                // the dimension
         , time_t after              // the start timestamp
         , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
+        , BACKEND_OPTIONS backend_options // BACKEND_SOURCE_* bitmap
         , time_t *first_timestamp   // the first point of the database used in this response
         , time_t *last_timestamp    // the timestamp that should be reported to backend
 ) {
     RRDHOST *host = st->rrdhost;
+    (void)host;
 
     // find the edges of the rrd database for this chart
     time_t first_t = rrdset_first_entry_t(st);
@@ -132,7 +135,7 @@ inline calculated_number backend_calculate_value_from_stored_data(
         return NAN;
     }
 
-    if(unlikely((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_SUM))
+    if(unlikely(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_SUM))
         return sum;
 
     return sum / (calculated_number)counter;
@@ -142,7 +145,7 @@ inline calculated_number backend_calculate_value_from_stored_data(
 // discard a response received by a backend
 // after logging a simple of it to error.log
 
-static inline int discard_response(BUFFER *b, const char *backend) {
+int discard_response(BUFFER *b, const char *backend) {
     char sample[1024];
     const char *s = buffer_tostring(b);
     char *d = sample, *e = &sample[sizeof(sample) - 1];
@@ -161,328 +164,14 @@ static inline int discard_response(BUFFER *b, const char *backend) {
 
 
 // ----------------------------------------------------------------------------
-// graphite backend
-
-static inline int format_dimension_collected_graphite_plaintext(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-    (void)after;
-    (void)before;
-    (void)options;
-
-    char chart_name[RRD_ID_LENGTH_MAX + 1];
-    char dimension_name[RRD_ID_LENGTH_MAX + 1];
-    backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX);
-    backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX);
-
-    buffer_sprintf(
-            b
-            , "%s.%s.%s.%s " COLLECTED_NUMBER_FORMAT " %u\n"
-            , prefix
-            , hostname
-            , chart_name
-            , dimension_name
-            , rd->last_collected_value
-            , (uint32_t)rd->last_collected_time.tv_sec
-    );
-
-    return 1;
-}
-
-static inline int format_dimension_stored_graphite_plaintext(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-
-    char chart_name[RRD_ID_LENGTH_MAX + 1];
-    char dimension_name[RRD_ID_LENGTH_MAX + 1];
-    backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX);
-    backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX);
-
-    time_t first_t = after, last_t = before;
-    calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options, &first_t, &last_t);
-
-    if(!isnan(value)) {
-
-        buffer_sprintf(
-                b
-                , "%s.%s.%s.%s " CALCULATED_NUMBER_FORMAT " %u\n"
-                , prefix
-                , hostname
-                , chart_name
-                , dimension_name
-                , value
-                , (uint32_t) last_t
-        );
-
-        return 1;
-    }
-    return 0;
-}
-
-static inline int process_graphite_response(BUFFER *b) {
-    return discard_response(b, "graphite");
-}
-
-
-// ----------------------------------------------------------------------------
-// opentsdb backend
-
-static inline int format_dimension_collected_opentsdb_telnet(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-    (void)after;
-    (void)before;
-    (void)options;
-
-    char chart_name[RRD_ID_LENGTH_MAX + 1];
-    char dimension_name[RRD_ID_LENGTH_MAX + 1];
-    backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX);
-    backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX);
-
-    buffer_sprintf(
-            b
-            , "put %s.%s.%s %u " COLLECTED_NUMBER_FORMAT " host=%s%s%s\n"
-            , prefix
-            , chart_name
-            , dimension_name
-            , (uint32_t)rd->last_collected_time.tv_sec
-            , rd->last_collected_value
-            , hostname
-            , (host->tags)?" ":""
-            , (host->tags)?host->tags:""
-    );
-
-    return 1;
-}
-
-static inline int format_dimension_stored_opentsdb_telnet(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-
-    time_t first_t = after, last_t = before;
-    calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options, &first_t, &last_t);
-
-    char chart_name[RRD_ID_LENGTH_MAX + 1];
-    char dimension_name[RRD_ID_LENGTH_MAX + 1];
-    backend_name_copy(chart_name, (backend_send_names && st->name)?st->name:st->id, RRD_ID_LENGTH_MAX);
-    backend_name_copy(dimension_name, (backend_send_names && rd->name)?rd->name:rd->id, RRD_ID_LENGTH_MAX);
-
-    if(!isnan(value)) {
-
-        buffer_sprintf(
-                b
-                , "put %s.%s.%s %u " CALCULATED_NUMBER_FORMAT " host=%s%s%s\n"
-                , prefix
-                , chart_name
-                , dimension_name
-                , (uint32_t) last_t
-                , value
-                , hostname
-                , (host->tags)?" ":""
-                , (host->tags)?host->tags:""
-        );
-
-        return 1;
-    }
-    return 0;
-}
-
-static inline int process_opentsdb_response(BUFFER *b) {
-    return discard_response(b, "opentsdb");
-}
-
-
-// ----------------------------------------------------------------------------
-// json backend
-
-static inline int format_dimension_collected_json_plaintext(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-    (void)after;
-    (void)before;
-    (void)options;
-
-    const char *tags_pre = "", *tags_post = "", *tags = host->tags;
-    if(!tags) tags = "";
-
-    if(*tags) {
-        if(*tags == '{' || *tags == '[' || *tags == '"') {
-            tags_pre = "\"host_tags\":";
-            tags_post = ",";
-        }
-        else {
-            tags_pre = "\"host_tags\":\"";
-            tags_post = "\",";
-        }
-    }
-
-    buffer_sprintf(b, "{"
-        "\"prefix\":\"%s\","
-        "\"hostname\":\"%s\","
-        "%s%s%s"
-
-        "\"chart_id\":\"%s\","
-        "\"chart_name\":\"%s\","
-        "\"chart_family\":\"%s\","
-        "\"chart_context\": \"%s\","
-        "\"chart_type\":\"%s\","
-        "\"units\": \"%s\","
-
-        "\"id\":\"%s\","
-        "\"name\":\"%s\","
-        "\"value\":" COLLECTED_NUMBER_FORMAT ","
-
-        "\"timestamp\": %u}\n",
-            prefix,
-            hostname,
-            tags_pre, tags, tags_post,
-
-            st->id,
-            st->name,
-            st->family,
-            st->context,
-            st->type,
-            st->units,
-
-            rd->id,
-            rd->name,
-            rd->last_collected_value,
-
-            (uint32_t)rd->last_collected_time.tv_sec
-    );
-
-    return 1;
-}
-
-static inline int format_dimension_stored_json_plaintext(
-          BUFFER *b                 // the buffer to write data to
-        , const char *prefix        // the prefix to use
-        , RRDHOST *host             // the host this chart comes from
-        , const char *hostname      // the hostname (to override host->hostname)
-        , RRDSET *st                // the chart
-        , RRDDIM *rd                // the dimension
-        , time_t after              // the start timestamp
-        , time_t before             // the end timestamp
-        , uint32_t options          // BACKEND_SOURCE_* bitmap
-) {
-    (void)host;
-
-    time_t first_t = after, last_t = before;
-    calculated_number value = backend_calculate_value_from_stored_data(st, rd, after, before, options, &first_t, &last_t);
-
-    if(!isnan(value)) {
-        const char *tags_pre = "", *tags_post = "", *tags = host->tags;
-        if(!tags) tags = "";
-
-        if(*tags) {
-            if(*tags == '{' || *tags == '[' || *tags == '"') {
-                tags_pre = "\"host_tags\":";
-                tags_post = ",";
-            }
-            else {
-                tags_pre = "\"host_tags\":\"";
-                tags_post = "\",";
-            }
-        }
-
-        buffer_sprintf(b, "{"
-            "\"prefix\":\"%s\","
-            "\"hostname\":\"%s\","
-            "%s%s%s"
-
-            "\"chart_id\":\"%s\","
-            "\"chart_name\":\"%s\","
-            "\"chart_family\":\"%s\","
-            "\"chart_context\": \"%s\","
-            "\"chart_type\":\"%s\","
-            "\"units\": \"%s\","
-
-            "\"id\":\"%s\","
-            "\"name\":\"%s\","
-            "\"value\":" CALCULATED_NUMBER_FORMAT ","
-
-            "\"timestamp\": %u}\n", 
-                prefix,
-                hostname,
-                tags_pre, tags, tags_post,
-
-                st->id,
-                st->name,
-                st->family,
-                st->context,
-                st->type,
-                st->units,
-
-                rd->id,
-                rd->name,
-                value, 
-                
-                (uint32_t) last_t
-        );
-        
-        return 1;
-    }
-    return 0;
-}
-
-static inline int process_json_response(BUFFER *b) {
-    return discard_response(b, "json");
-}
-
-
-// ----------------------------------------------------------------------------
 // the backend thread
 
 static SIMPLE_PATTERN *charts_pattern = NULL;
 static SIMPLE_PATTERN *hosts_pattern = NULL;
 
-inline int backends_can_send_rrdset(uint32_t options, RRDSET *st) {
+inline int backends_can_send_rrdset(BACKEND_OPTIONS backend_options, RRDSET *st) {
     RRDHOST *host = st->rrdhost;
+    (void)host;
 
     if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_BACKEND_IGNORE)))
         return 0;
@@ -503,7 +192,7 @@ inline int backends_can_send_rrdset(uint32_t options, RRDSET *st) {
         return 0;
     }
 
-    if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE && !((options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED))) {
+    if(unlikely(st->rrd_memory_mode == RRD_MEMORY_MODE_NONE && !(BACKEND_OPTIONS_DATA_SOURCE(backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED))) {
         debug(D_BACKEND, "BACKEND: not sending chart '%s' of host '%s' because its memory mode is '%s' and the backend requires database access.", st->id, host->hostname, rrd_memory_mode_name(host->rrd_memory_mode));
         return 0;
     }
@@ -511,24 +200,24 @@ inline int backends_can_send_rrdset(uint32_t options, RRDSET *st) {
     return 1;
 }
 
-inline uint32_t backend_parse_data_source(const char *source, uint32_t mode) {
+inline BACKEND_OPTIONS backend_parse_data_source(const char *source, BACKEND_OPTIONS backend_options) {
     if(!strcmp(source, "raw") || !strcmp(source, "as collected") || !strcmp(source, "as-collected") || !strcmp(source, "as_collected") || !strcmp(source, "ascollected")) {
-        mode |= BACKEND_SOURCE_DATA_AS_COLLECTED;
-        mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AS_COLLECTED);
+        backend_options |= BACKEND_SOURCE_DATA_AS_COLLECTED;
+        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AS_COLLECTED);
     }
     else if(!strcmp(source, "average")) {
-        mode |= BACKEND_SOURCE_DATA_AVERAGE;
-        mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AVERAGE);
+        backend_options |= BACKEND_SOURCE_DATA_AVERAGE;
+        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_AVERAGE);
     }
     else if(!strcmp(source, "sum") || !strcmp(source, "volume")) {
-        mode |= BACKEND_SOURCE_DATA_SUM;
-        mode &= ~(BACKEND_SOURCE_BITS ^ BACKEND_SOURCE_DATA_SUM);
+        backend_options |= BACKEND_SOURCE_DATA_SUM;
+        backend_options &= ~(BACKEND_OPTIONS_SOURCE_BITS ^ BACKEND_SOURCE_DATA_SUM);
     }
     else {
         error("BACKEND: invalid data source method '%s'.", source);
     }
 
-    return mode;
+    return backend_options;
 }
 
 static void backends_main_cleanup(void *ptr) {
@@ -546,7 +235,7 @@ void *backends_main(void *ptr) {
     int default_port = 0;
     int sock = -1;
     BUFFER *b = buffer_create(1), *response = buffer_create(1);
-    int (*backend_request_formatter)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, uint32_t) = NULL;
+    int (*backend_request_formatter)(BUFFER *, const char *, RRDHOST *, const char *, RRDSET *, RRDDIM *, time_t, time_t, BACKEND_OPTIONS) = NULL;
     int (*backend_response_checker)(BUFFER *) = NULL;
 
     // ------------------------------------------------------------------------
@@ -556,35 +245,39 @@ void *backends_main(void *ptr) {
             .tv_sec = 0,
             .tv_usec = 0
     };
-    int enabled             = config_get_boolean(CONFIG_SECTION_BACKEND, "enabled", 0);
-    const char *source      = config_get(CONFIG_SECTION_BACKEND, "data source", "average");
-    const char *type        = config_get(CONFIG_SECTION_BACKEND, "type", "graphite");
-    const char *destination = config_get(CONFIG_SECTION_BACKEND, "destination", "localhost");
-    backend_prefix          = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata");
-    const char *hostname    = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname);
-    backend_update_every    = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", backend_update_every);
-    int buffer_on_failures  = (int)config_get_number(CONFIG_SECTION_BACKEND, "buffer on failures", 10);
-    long timeoutms          = config_get_number(CONFIG_SECTION_BACKEND, "timeout ms", backend_update_every * 2 * 1000);
-    backend_send_names      = config_get_boolean(CONFIG_SECTION_BACKEND, "send names instead of ids", backend_send_names);
+    int enabled                 = config_get_boolean(CONFIG_SECTION_BACKEND, "enabled", 0);
+    const char *source          = config_get(CONFIG_SECTION_BACKEND, "data source", "average");
+    const char *type            = config_get(CONFIG_SECTION_BACKEND, "type", "graphite");
+    const char *destination     = config_get(CONFIG_SECTION_BACKEND, "destination", "localhost");
+    global_backend_prefix       = config_get(CONFIG_SECTION_BACKEND, "prefix", "netdata");
+    const char *hostname        = config_get(CONFIG_SECTION_BACKEND, "hostname", localhost->hostname);
+    global_backend_update_every = (int)config_get_number(CONFIG_SECTION_BACKEND, "update every", global_backend_update_every);
+    int buffer_on_failures      = (int)config_get_number(CONFIG_SECTION_BACKEND, "buffer on failures", 10);
+    long timeoutms              = config_get_number(CONFIG_SECTION_BACKEND, "timeout ms", global_backend_update_every * 2 * 1000);
+
+    if(config_get_boolean(CONFIG_SECTION_BACKEND, "send names instead of ids", (global_backend_options & BACKEND_OPTION_SEND_NAMES)))
+        global_backend_options |= BACKEND_OPTION_SEND_NAMES;
+    else
+        global_backend_options &= ~BACKEND_OPTION_SEND_NAMES;
 
     charts_pattern = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send charts matching", "*"), NULL, SIMPLE_PATTERN_EXACT);
-    hosts_pattern = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send hosts matching", "localhost *"), NULL, SIMPLE_PATTERN_EXACT);
+    hosts_pattern  = simple_pattern_create(config_get(CONFIG_SECTION_BACKEND, "send hosts matching", "localhost *"), NULL, SIMPLE_PATTERN_EXACT);
 
 
     // ------------------------------------------------------------------------
     // validate configuration options
     // and prepare for sending data to our backend
 
-    backend_options = backend_parse_data_source(source, backend_options);
+    global_backend_options = backend_parse_data_source(source, global_backend_options);
 
     if(timeoutms < 1) {
-        error("BACKEND: invalid timeout %ld ms given. Assuming %d ms.", timeoutms, backend_update_every * 2 * 1000);
-        timeoutms = backend_update_every * 2 * 1000;
+        error("BACKEND: invalid timeout %ld ms given. Assuming %d ms.", timeoutms, global_backend_update_every * 2 * 1000);
+        timeoutms = global_backend_update_every * 2 * 1000;
     }
     timeout.tv_sec  = (timeoutms * 1000) / 1000000;
     timeout.tv_usec = (timeoutms * 1000) % 1000000;
 
-    if(!enabled || backend_update_every < 1)
+    if(!enabled || global_backend_update_every < 1)
         goto cleanup;
 
     // ------------------------------------------------------------------------
@@ -595,7 +288,7 @@ void *backends_main(void *ptr) {
         default_port = 2003;
         backend_response_checker = process_graphite_response;
 
-        if((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED)
+        if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
             backend_request_formatter = format_dimension_collected_graphite_plaintext;
         else
             backend_request_formatter = format_dimension_stored_graphite_plaintext;
@@ -606,7 +299,7 @@ void *backends_main(void *ptr) {
         default_port = 4242;
         backend_response_checker = process_opentsdb_response;
 
-        if((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED)
+        if(BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
             backend_request_formatter = format_dimension_collected_opentsdb_telnet;
         else
             backend_request_formatter = format_dimension_stored_opentsdb_telnet;
@@ -617,7 +310,7 @@ void *backends_main(void *ptr) {
         default_port = 5448;
         backend_response_checker = process_json_response;
 
-        if ((backend_options & BACKEND_SOURCE_BITS) == BACKEND_SOURCE_DATA_AS_COLLECTED)
+        if (BACKEND_OPTIONS_DATA_SOURCE(global_backend_options) == BACKEND_SOURCE_DATA_AS_COLLECTED)
             backend_request_formatter = format_dimension_collected_json_plaintext;
         else
             backend_request_formatter = format_dimension_stored_json_plaintext;
@@ -651,21 +344,21 @@ void *backends_main(void *ptr) {
             chart_transmission_failures = 0,
             chart_data_lost_events = 0,
             chart_lost_bytes = 0,
-            chart_backend_reconnects = 0,
-            chart_backend_latency = 0;
+            chart_backend_reconnects = 0;
+            // chart_backend_latency = 0;
 
-    RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", "backends", NULL, 130600, backend_update_every, RRDSET_TYPE_LINE);
+    RRDSET *chart_metrics = rrdset_create_localhost("netdata", "backend_metrics", NULL, "backend", NULL, "Netdata Buffered Metrics", "metrics", "backends", NULL, 130600, global_backend_update_every, RRDSET_TYPE_LINE);
     rrddim_add(chart_metrics, "buffered", NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_metrics, "lost",     NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_metrics, "sent",     NULL,  1, 1, RRD_ALGORITHM_ABSOLUTE);
 
-    RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", "backends", NULL, 130610, backend_update_every, RRDSET_TYPE_AREA);
+    RRDSET *chart_bytes = rrdset_create_localhost("netdata", "backend_bytes", NULL, "backend", NULL, "Netdata Backend Data Size", "KB", "backends", NULL, 130610, global_backend_update_every, RRDSET_TYPE_AREA);
     rrddim_add(chart_bytes, "buffered", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_bytes, "lost",     NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_bytes, "sent",     NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_bytes, "received", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
 
-    RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", "backends", NULL, 130630, backend_update_every, RRDSET_TYPE_LINE);
+    RRDSET *chart_ops = rrdset_create_localhost("netdata", "backend_ops", NULL, "backend", NULL, "Netdata Backend Operations", "operations", "backends", NULL, 130630, global_backend_update_every, RRDSET_TYPE_LINE);
     rrddim_add(chart_ops, "write",     NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_ops, "discard",   NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
     rrddim_add(chart_ops, "reconnect", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
@@ -679,11 +372,11 @@ void *backends_main(void *ptr) {
      *
      * issue #1432 and https://www.softlab.ntua.gr/facilities/documentation/unix/unix-socket-faq/unix-socket-faq-2.html
      *
-    RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", "backends", NULL, 130620, backend_update_every, RRDSET_TYPE_AREA);
+    RRDSET *chart_latency = rrdset_create_localhost("netdata", "backend_latency", NULL, "backend", NULL, "Netdata Backend Latency", "ms", "backends", NULL, 130620, global_backend_update_every, RRDSET_TYPE_AREA);
     rrddim_add(chart_latency, "latency",   NULL,  1, 1000, RRD_ALGORITHM_ABSOLUTE);
     */
 
-    RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", "backends", NULL, 130630, backend_update_every, RRDSET_TYPE_STACKED);
+    RRDSET *chart_rusage = rrdset_create_localhost("netdata", "backend_thread_cpu", NULL, "backend", NULL, "NetData Backend Thread CPU usage", "milliseconds/s", "backends", NULL, 130630, global_backend_update_every, RRDSET_TYPE_STACKED);
     rrddim_add(chart_rusage, "user",   NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
     rrddim_add(chart_rusage, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
 
@@ -691,9 +384,9 @@ void *backends_main(void *ptr) {
     // ------------------------------------------------------------------------
     // prepare the backend main loop
 
-    info("BACKEND: configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, backend_update_every, hostname, backend_prefix);
+    info("BACKEND: configured ('%s' on '%s' sending '%s' data, every %d seconds, as host '%s', with prefix '%s')", type, destination, source, global_backend_update_every, hostname, global_backend_prefix);
 
-    usec_t step_ut = backend_update_every * USEC_PER_SEC;
+    usec_t step_ut = global_backend_update_every * USEC_PER_SEC;
     time_t after = now_realtime_sec();
     int failures = 0;
     heartbeat_t hb;
@@ -746,7 +439,7 @@ void *backends_main(void *ptr) {
 
             RRDSET *st;
             rrdset_foreach_read(st, host) {
-                if(likely(backends_can_send_rrdset(backend_options, st))) {
+                if(likely(backends_can_send_rrdset(global_backend_options, st))) {
                     rrdset_rdlock(st);
 
                     count_charts++;
@@ -754,7 +447,7 @@ void *backends_main(void *ptr) {
                     RRDDIM *rd;
                     rrddim_foreach_read(rd, st) {
                         if (likely(rd->last_collected_time.tv_sec >= after)) {
-                            chart_buffered_metrics += backend_request_formatter(b, backend_prefix, host, __hostname, st, rd, after, before, backend_options);
+                            chart_buffered_metrics += backend_request_formatter(b, global_backend_prefix, host, __hostname, st, rd, after, before, global_backend_options);
                             count_dims++;
                         }
                         else {
@@ -792,12 +485,12 @@ void *backends_main(void *ptr) {
         chart_transmission_failures =
         chart_data_lost_events =
         chart_lost_bytes =
-        chart_backend_reconnects =
-        chart_backend_latency = 0;
+        chart_backend_reconnects = 0;
+        // chart_backend_latency = 0;
 
         if(unlikely(netdata_exit)) break;
 
-        //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b)); // FIXME
+        //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b));
         //fprintf(stderr, "after = %lu, before = %lu\n", after, before);
 
         // prepare for the next iteration
@@ -843,13 +536,13 @@ void *backends_main(void *ptr) {
         // if we are not connected, connect to a backend server
 
         if(unlikely(sock == -1)) {
-            usec_t start_ut = now_monotonic_usec();
+            // usec_t start_ut = now_monotonic_usec();
             size_t reconnects = 0;
 
             sock = connect_to_one_of(destination, default_port, &timeout, &reconnects, NULL, 0);
 
             chart_backend_reconnects += reconnects;
-            chart_backend_latency += now_monotonic_usec() - start_ut;
+            // chart_backend_latency += now_monotonic_usec() - start_ut;
         }
 
         if(unlikely(netdata_exit)) break;
@@ -859,14 +552,14 @@ void *backends_main(void *ptr) {
 
         if(likely(sock != -1)) {
             size_t len = buffer_strlen(b);
-            usec_t start_ut = now_monotonic_usec();
+            // usec_t start_ut = now_monotonic_usec();
             int flags = 0;
 #ifdef MSG_NOSIGNAL
             flags += MSG_NOSIGNAL;
 #endif
 
             ssize_t written = send(sock, buffer_tostring(b), len, flags);
-            chart_backend_latency += now_monotonic_usec() - start_ut;
+            // chart_backend_latency += now_monotonic_usec() - start_ut;
             if(written != -1 && (size_t)written == len) {
                 // we sent the data successfully
                 chart_transmission_successes++;