Merging upstream version 1.30.0.

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

11 files changed, 137 insertions, 74 deletions

diff --git a/web/api/exporters/shell/README.md b/web/api/exporters/shell/README.md
index b919045f2..9d44a3707 100644
--- a/web/api/exporters/shell/README.md
+++ b/web/api/exporters/shell/README.md
@@ -38,14 +38,12 @@ echo ${NETDATA_SYSTEM_CPU_VISIBLETOTAL}
 
 # what about alarms?
 set | grep "^NETDATA_ALARM_SYSTEM_SWAP_"
-NETDATA_ALARM_SYSTEM_SWAP_RAM_IN_SWAP_STATUS=CRITICAL
-NETDATA_ALARM_SYSTEM_SWAP_RAM_IN_SWAP_VALUE=53
 NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_STATUS=CLEAR
 NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_VALUE=51
 
-# let's get the current status of the alarm 'ram in swap'
-echo ${NETDATA_ALARM_SYSTEM_SWAP_RAM_IN_SWAP_STATUS}
-CRITICAL
+# let's get the current status of the alarm 'used swap'
+echo ${NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_STATUS}
+CLEAR
 
 # is it fast?
 time curl -s 'http://localhost:19999/api/v1/allmetrics' >/dev/null
diff --git a/web/api/formatters/json/json.c b/web/api/formatters/json/json.c
index f28eb5738..bf311e22c 100644
--- a/web/api/formatters/json/json.c
+++ b/web/api/formatters/json/json.c
@@ -5,8 +5,14 @@
 #define JSON_DATES_JS 1
 #define JSON_DATES_TIMESTAMP 2
 
-void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable, RRDDIM *temp_rd) {
-    rrdset_check_rdlock(r->st);
+void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable,  struct context_param *context_param_list)
+{
+    RRDDIM *temp_rd = context_param_list ? context_param_list->rd : NULL;
+
+    int should_lock = (!context_param_list || !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE));
+
+    if (should_lock)
+        rrdset_check_rdlock(r->st);
 
     //info("RRD2JSON(): %s: BEGIN", r->st->id);
     int row_annotations = 0, dates, dates_with_new = 0;
diff --git a/web/api/formatters/json/json.h b/web/api/formatters/json/json.h
index 6d73a3ffe..5c4e11371 100644
--- a/web/api/formatters/json/json.h
+++ b/web/api/formatters/json/json.h
@@ -5,6 +5,6 @@
 
 #include "../rrd2json.h"
 
-extern void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable, RRDDIM *temp_rd);
+extern void rrdr2json(RRDR *r, BUFFER *wb, RRDR_OPTIONS options, int datatable, struct context_param *context_param_list);
 
 #endif //NETDATA_API_FORMATTER_JSON_H
diff --git a/web/api/formatters/json_wrapper.c b/web/api/formatters/json_wrapper.c
index cf4f1099a..1d9c2472a 100644
--- a/web/api/formatters/json_wrapper.c
+++ b/web/api/formatters/json_wrapper.c
@@ -2,8 +2,16 @@
 
 #include "json_wrapper.h"
 
-void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value, RRDDIM *temp_rd, char *chart_label_key) {
-    rrdset_check_rdlock(r->st);
+void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value,
+                             struct context_param *context_param_list, char *chart_label_key)
+{
+
+    RRDDIM *temp_rd = context_param_list ? context_param_list->rd : NULL;
+    int should_lock = (!context_param_list || !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE));
+    uint8_t context_mode = (!context_param_list || (context_param_list->flags & CONTEXT_FLAGS_CONTEXT));
+
+    if (should_lock)
+        rrdset_check_rdlock(r->st);
 
     long rows = rrdr_rows(r);
     long c, i;
@@ -22,7 +30,8 @@ void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS
         sq[0] = '"';
     }
 
-    rrdset_rdlock(r->st);
+    if (should_lock)
+        rrdset_rdlock(r->st);
     buffer_sprintf(wb, "{\n"
                        "   %sapi%s: 1,\n"
                        "   %sid%s: %s%s%s,\n"
@@ -35,16 +44,17 @@ void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS
                        "   %safter%s: %u,\n"
                        "   %sdimension_names%s: ["
                    , kq, kq
-                   , kq, kq, sq, temp_rd?r->st->context:r->st->id, sq
-                   , kq, kq, sq, temp_rd?r->st->context:r->st->name, sq
+                   , kq, kq, sq, context_mode && temp_rd?r->st->context:r->st->id, sq
+                   , kq, kq, sq, context_mode && temp_rd?r->st->context:r->st->name, sq
                    , kq, kq, r->update_every
                    , kq, kq, r->st->update_every
-                   , kq, kq, (uint32_t)rrdset_first_entry_t_nolock(r->st)
-                   , kq, kq, (uint32_t)rrdset_last_entry_t_nolock(r->st)
+                   , kq, kq, (uint32_t) (context_param_list ? context_param_list->first_entry_t : rrdset_first_entry_t_nolock(r->st))
+                   , kq, kq, (uint32_t) (context_param_list ? context_param_list->last_entry_t : rrdset_last_entry_t_nolock(r->st))
                    , kq, kq, (uint32_t)r->before
                    , kq, kq, (uint32_t)r->after
                    , kq, kq);
-    rrdset_unlock(r->st);
+    if (should_lock)
+        rrdset_unlock(r->st);
 
     for(c = 0, i = 0, rd = temp_rd?temp_rd:r->st->dimensions; rd && c < r->d ;c++, rd = rd->next) {
         if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
@@ -89,7 +99,7 @@ void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS
     buffer_strcat(wb, "],\n");
 
     // Composite charts
-    if (temp_rd) {
+    if (context_mode && temp_rd) {
         buffer_sprintf(
             wb,
             "   %schart_ids%s: [",
diff --git a/web/api/formatters/json_wrapper.h b/web/api/formatters/json_wrapper.h
index d48d5d1ae..14662db74 100644
--- a/web/api/formatters/json_wrapper.h
+++ b/web/api/formatters/json_wrapper.h
@@ -5,7 +5,7 @@
 
 #include "rrd2json.h"
 
-extern void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value, RRDDIM *temp_rd, char *chart_key);
+extern void rrdr_json_wrapper_begin(RRDR *r, BUFFER *wb, uint32_t format, RRDR_OPTIONS options, int string_value, struct context_param *context_param_list, char *chart_key);
 extern void rrdr_json_wrapper_end(RRDR *r, BUFFER *wb, uint32_t format, uint32_t options, int string_value);
 
 #endif //NETDATA_API_FORMATTER_JSON_WRAPPER_H
diff --git a/web/api/formatters/rrd2json.c b/web/api/formatters/rrd2json.c
index d8e248066..5b12c89ba 100644
--- a/web/api/formatters/rrd2json.c
+++ b/web/api/formatters/rrd2json.c
@@ -2,7 +2,28 @@
 
 #include "web/api/web_api_v1.h"
 
-static inline void free_temp_rrddim(RRDDIM *temp_rd)
+static inline void free_single_rrdrim(RRDDIM *temp_rd, int archive_mode)
+{
+    if (unlikely(!temp_rd))
+        return;
+
+    freez((char *)temp_rd->id);
+    freez((char *)temp_rd->name);
+
+    if (unlikely(archive_mode)) {
+        temp_rd->rrdset->counter--;
+        if (!temp_rd->rrdset->counter) {
+            freez((char *)temp_rd->rrdset->name);
+            freez(temp_rd->rrdset->context);
+            freez(temp_rd->rrdset);
+        }
+    }
+    freez(temp_rd->state->metric_uuid);
+    freez(temp_rd->state);
+    freez(temp_rd);
+}
+
+static inline void free_rrddim_list(RRDDIM *temp_rd, int archive_mode)
 {
     if (unlikely(!temp_rd))
         return;
@@ -10,14 +31,7 @@ static inline void free_temp_rrddim(RRDDIM *temp_rd)
     RRDDIM *t;
     while (temp_rd) {
         t = temp_rd->next;
-        freez((char *)temp_rd->id);
-        freez((char *)temp_rd->name);
-#ifdef ENABLE_DBENGINE
-        if (temp_rd->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE)
-            freez(temp_rd->state->metric_uuid);
-#endif
-        freez(temp_rd->state);
-        freez(temp_rd);
+        free_single_rrdrim(temp_rd, archive_mode);
         temp_rd = t;
     }
 }
@@ -27,7 +41,7 @@ void free_context_param_list(struct context_param **param_list)
     if (unlikely(!param_list || !*param_list))
         return;
 
-    free_temp_rrddim(((*param_list)->rd));
+    free_rrddim_list(((*param_list)->rd), (*param_list)->flags & CONTEXT_FLAGS_ARCHIVE);
     freez((*param_list));
     *param_list = NULL;
 }
@@ -36,21 +50,17 @@ void rebuild_context_param_list(struct context_param *context_param_list, time_t
 {
     RRDDIM *temp_rd = context_param_list->rd;
     RRDDIM *new_rd_list = NULL, *t;
+    int is_archived = (context_param_list->flags & CONTEXT_FLAGS_ARCHIVE);
     while (temp_rd) {
         t = temp_rd->next;
-        if (rrdset_last_entry_t(temp_rd->rrdset) >= after_requested) {
+        RRDSET *st = temp_rd->rrdset;
+        time_t last_entry_t = is_archived ? st->last_entry_t : rrdset_last_entry_t(st);
+
+        if (last_entry_t >= after_requested) {
             temp_rd->next = new_rd_list;
             new_rd_list = temp_rd;
-        } else {
-            freez((char *)temp_rd->id);
-            freez((char *)temp_rd->name);
-#ifdef ENABLE_DBENGINE
-            if (temp_rd->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE)
-                freez(temp_rd->state->metric_uuid);
-#endif
-            freez(temp_rd->state);
-            freez(temp_rd);
-        }
+        } else
+            free_single_rrdrim(temp_rd, is_archived);
         temp_rd = t;
     }
     context_param_list->rd = new_rd_list;
@@ -65,6 +75,7 @@ void build_context_param_list(struct context_param **param_list, RRDSET *st)
         *param_list = mallocz(sizeof(struct context_param));
         (*param_list)->first_entry_t = LONG_MAX;
         (*param_list)->last_entry_t = 0;
+        (*param_list)->flags = CONTEXT_FLAGS_CONTEXT;
         (*param_list)->rd = NULL;
     }
 
@@ -214,9 +225,9 @@ int rrdset2anything_api_v1(
         , struct context_param *context_param_list
         , char *chart_label_key
 ) {
-    time_t last_accessed_time = now_realtime_sec();
-    st->last_accessed_time = last_accessed_time;
 
+    if (context_param_list && !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE))
+        st->last_accessed_time = now_realtime_sec();
 
     RRDR *r = rrd2rrdr(st, points, after, before, group_method, group_time, options, dimensions?buffer_tostring(dimensions):NULL, context_param_list);
     if(!r) {
@@ -238,7 +249,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_SSV:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             rrdr2ssv(r, wb, options, "", " ", "");
             rrdr_json_wrapper_end(r, wb, format, options, 1);
         }
@@ -251,7 +262,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_SSV_COMMA:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             rrdr2ssv(r, wb, options, "", ",", "");
             rrdr_json_wrapper_end(r, wb, format, options, 1);
         }
@@ -264,7 +275,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_JS_ARRAY:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
             rrdr2ssv(r, wb, options, "[", ",", "]");
             rrdr_json_wrapper_end(r, wb, format, options, 0);
         }
@@ -277,7 +288,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_CSV:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             rrdr2csv(r, wb, format, options, "", ",", "\\n", "", temp_rd);
             rrdr_json_wrapper_end(r, wb, format, options, 1);
         }
@@ -290,7 +301,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_CSV_MARKDOWN:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             rrdr2csv(r, wb, format, options, "", "|", "\\n", "", temp_rd);
             rrdr_json_wrapper_end(r, wb, format, options, 1);
         }
@@ -303,7 +314,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_CSV_JSON_ARRAY:
         wb->contenttype = CT_APPLICATION_JSON;
         if(options & RRDR_OPTION_JSON_WRAP) {
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
             buffer_strcat(wb, "[\n");
             rrdr2csv(r, wb, format, options + RRDR_OPTION_LABEL_QUOTES, "[", ",", "]", ",\n", temp_rd);
             buffer_strcat(wb, "\n]");
@@ -320,7 +331,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_TSV:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             rrdr2csv(r, wb, format, options, "", "\t", "\\n", "", temp_rd);
             rrdr_json_wrapper_end(r, wb, format, options, 1);
         }
@@ -333,7 +344,7 @@ int rrdset2anything_api_v1(
     case DATASOURCE_HTML:
         if(options & RRDR_OPTION_JSON_WRAP) {
             wb->contenttype = CT_APPLICATION_JSON;
-            rrdr_json_wrapper_begin(r, wb, format, options, 1, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 1, context_param_list, chart_label_key);
             buffer_strcat(wb, "<html>\\n<center>\\n<table border=\\\"0\\\" cellpadding=\\\"5\\\" cellspacing=\\\"5\\\">\\n");
             rrdr2csv(r, wb, format, options, "<tr><td>", "</td><td>", "</td></tr>\\n", "", temp_rd);
             buffer_strcat(wb, "</table>\\n</center>\\n</html>\\n");
@@ -351,9 +362,9 @@ int rrdset2anything_api_v1(
         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
 
         if(options & RRDR_OPTION_JSON_WRAP)
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
 
-        rrdr2json(r, wb, options, 1, temp_rd);
+        rrdr2json(r, wb, options, 1, context_param_list);
 
         if(options & RRDR_OPTION_JSON_WRAP)
             rrdr_json_wrapper_end(r, wb, format, options, 0);
@@ -363,9 +374,9 @@ int rrdset2anything_api_v1(
         wb->contenttype = CT_APPLICATION_JSON;
 
         if(options & RRDR_OPTION_JSON_WRAP)
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
 
-        rrdr2json(r, wb, options, 1, temp_rd);
+        rrdr2json(r, wb, options, 1, context_param_list);
 
         if(options & RRDR_OPTION_JSON_WRAP)
             rrdr_json_wrapper_end(r, wb, format, options, 0);
@@ -374,9 +385,9 @@ int rrdset2anything_api_v1(
     case DATASOURCE_JSONP:
         wb->contenttype = CT_APPLICATION_X_JAVASCRIPT;
         if(options & RRDR_OPTION_JSON_WRAP)
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
 
-        rrdr2json(r, wb, options, 0, temp_rd);
+        rrdr2json(r, wb, options, 0, context_param_list);
 
         if(options & RRDR_OPTION_JSON_WRAP)
             rrdr_json_wrapper_end(r, wb, format, options, 0);
@@ -387,9 +398,9 @@ int rrdset2anything_api_v1(
         wb->contenttype = CT_APPLICATION_JSON;
 
         if(options & RRDR_OPTION_JSON_WRAP)
-            rrdr_json_wrapper_begin(r, wb, format, options, 0, temp_rd, chart_label_key);
+            rrdr_json_wrapper_begin(r, wb, format, options, 0, context_param_list, chart_label_key);
 
-        rrdr2json(r, wb, options, 0, temp_rd);
+        rrdr2json(r, wb, options, 0, context_param_list);
 
         if(options & RRDR_OPTION_JSON_WRAP)
             rrdr_json_wrapper_end(r, wb, format, options, 0);
diff --git a/web/api/formatters/value/value.c b/web/api/formatters/value/value.c
index aea6c162b..a69af6165 100644
--- a/web/api/formatters/value/value.c
+++ b/web/api/formatters/value/value.c
@@ -4,7 +4,8 @@
 
 
 inline calculated_number rrdr2value(RRDR *r, long i, RRDR_OPTIONS options, int *all_values_are_null) {
-    rrdset_check_rdlock(r->st);
+    if (r->st_needs_lock)
+        rrdset_check_rdlock(r->st);
 
     long c;
     RRDDIM *d;
diff --git a/web/api/queries/query.c b/web/api/queries/query.c
index 663e4bd14..2a27a94fc 100644
--- a/web/api/queries/query.c
+++ b/web/api/queries/query.c
@@ -281,8 +281,14 @@ RRDR_GROUPING web_client_api_request_v1_data_group(const char *name, RRDR_GROUPI
 
 // ----------------------------------------------------------------------------
 
-static void rrdr_disable_not_selected_dimensions(RRDR *r, RRDR_OPTIONS options, const char *dims, RRDDIM *temp_rd) {
-    rrdset_check_rdlock(r->st);
+static void rrdr_disable_not_selected_dimensions(RRDR *r, RRDR_OPTIONS options, const char *dims,
+                                                 struct context_param *context_param_list)
+{
+    RRDDIM *temp_rd = context_param_list ? context_param_list->rd : NULL;
+    int should_lock = (!context_param_list || !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE));
+
+    if (should_lock)
+        rrdset_check_rdlock(r->st);
 
     if(unlikely(!dims || !*dims || (dims[0] == '*' && dims[1] == '\0'))) return;
 
@@ -758,8 +764,8 @@ static int rrdr_convert_before_after_to_absolute(
     }
 
     // allow relative for before (smaller than API_RELATIVE_TIME_MAX)
-    if(abs(before_requested) <= API_RELATIVE_TIME_MAX) {
-        if(abs(before_requested) % update_every) {
+    if(ABS(before_requested) <= API_RELATIVE_TIME_MAX) {
+        if(ABS(before_requested) % update_every) {
             // make sure it is multiple of st->update_every
             if(before_requested < 0) before_requested = before_requested - update_every -
                                                         before_requested % update_every;
@@ -772,9 +778,9 @@ static int rrdr_convert_before_after_to_absolute(
     }
 
     // allow relative for after (smaller than API_RELATIVE_TIME_MAX)
-    if(abs(after_requested) <= API_RELATIVE_TIME_MAX) {
+    if(ABS(after_requested) <= API_RELATIVE_TIME_MAX) {
         if(after_requested == 0) after_requested = -update_every;
-        if(abs(after_requested) % update_every) {
+        if(ABS(after_requested) % update_every) {
             // make sure it is multiple of st->update_every
             if(after_requested < 0) after_requested = after_requested - update_every - after_requested % update_every;
             else after_requested = after_requested + update_every - after_requested % update_every;
@@ -1060,10 +1066,11 @@ static RRDR *rrd2rrdr_fixedstep(
     // -------------------------------------------------------------------------
     // disable the not-wanted dimensions
 
-    rrdset_check_rdlock(st);
+    if (context_param_list && !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE))
+        rrdset_check_rdlock(st);
 
     if(dimensions)
-        rrdr_disable_not_selected_dimensions(r, options, dimensions, temp_rd);
+        rrdr_disable_not_selected_dimensions(r, options, dimensions, context_param_list);
 
 
     // -------------------------------------------------------------------------
@@ -1435,11 +1442,11 @@ static RRDR *rrd2rrdr_variablestep(
 
     // -------------------------------------------------------------------------
     // disable the not-wanted dimensions
-
-    rrdset_check_rdlock(st);
+    if (context_param_list && !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE))
+        rrdset_check_rdlock(st);
 
     if(dimensions)
-        rrdr_disable_not_selected_dimensions(r, options, dimensions, temp_rd);
+        rrdr_disable_not_selected_dimensions(r, options, dimensions, context_param_list);
 
 
     // -------------------------------------------------------------------------
@@ -1591,8 +1598,12 @@ RRDR *rrd2rrdr(
         if (first_entry_t > after_requested)
             first_entry_t = after_requested;
 
-    if (context_param_list)
+    if (context_param_list && !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE)) {
         rebuild_context_param_list(context_param_list, after_requested);
+        st = context_param_list->rd ? context_param_list->rd->rrdset : NULL;
+        if (unlikely(!st))
+            return NULL;
+    }
 
 #ifdef ENABLE_DBENGINE
     if (st->rrd_memory_mode == RRD_MEMORY_MODE_DBENGINE) {
diff --git a/web/api/queries/rrdr.c b/web/api/queries/rrdr.c
index ef237fa02..b64868222 100644
--- a/web/api/queries/rrdr.c
+++ b/web/api/queries/rrdr.c
@@ -100,7 +100,7 @@ inline void rrdr_free(RRDR *r)
 
 RRDR *rrdr_create(struct rrdset *st, long n, struct context_param *context_param_list)
 {
-    if(unlikely(!st)) {
+    if (unlikely(!st)) {
         error("NULL value given!");
         return NULL;
     }
@@ -108,7 +108,10 @@ RRDR *rrdr_create(struct rrdset *st, long n, struct context_param *context_param
     RRDR *r = callocz(1, sizeof(RRDR));
     r->st = st;
 
-    rrdr_lock_rrdset(r);
+    if (!context_param_list || !(context_param_list->flags & CONTEXT_FLAGS_ARCHIVE)) {
+        rrdr_lock_rrdset(r);
+        r->st_needs_lock = 1;
+    }
 
     RRDDIM *temp_rd =  context_param_list ? context_param_list->rd : NULL;
     RRDDIM *rd;
diff --git a/web/api/queries/rrdr.h b/web/api/queries/rrdr.h
index 4d349c305..d95c10857 100644
--- a/web/api/queries/rrdr.h
+++ b/web/api/queries/rrdr.h
@@ -73,6 +73,7 @@ typedef struct rrdresult {
     time_t after;
 
     int has_st_lock;        // if st is read locked by us
+    uint8_t st_needs_lock;  // if ST should be locked
 
     // internal rrd2rrdr() members below this point
     struct {
diff --git a/web/api/web_api_v1.c b/web/api/web_api_v1.c
index 73ac15d30..1d8217bbd 100644
--- a/web/api/web_api_v1.c
+++ b/web/api/web_api_v1.c
@@ -276,6 +276,7 @@ inline int web_client_api_request_v1_alarm_count(RRDHOST *host, struct web_clien
 
 inline int web_client_api_request_v1_alarm_log(RRDHOST *host, struct web_client *w, char *url) {
     uint32_t after = 0;
+    char *chart = NULL;
 
     while(url) {
         char *value = mystrsep(&url, "&");
@@ -285,12 +286,13 @@ inline int web_client_api_request_v1_alarm_log(RRDHOST *host, struct web_client
         if(!name || !*name) continue;
         if(!value || !*value) continue;
 
-        if(!strcmp(name, "after")) after = (uint32_t)strtoul(value, NULL, 0);
+        if (!strcmp(name, "after")) after = (uint32_t)strtoul(value, NULL, 0);
+        else if (!strcmp(name, "chart")) chart = value;
     }
 
     buffer_flush(w->response.data);
     w->response.data->contenttype = CT_APPLICATION_JSON;
-    health_alarm_log2json(host, w->response.data, after);
+    health_alarm_log2json(host, w->response.data, after, chart);
     return HTTP_RESP_OK;
 }
 
@@ -511,6 +513,10 @@ inline int web_client_api_request_v1_data(RRDHOST *host, struct web_client *w, c
         rrdhost_unlock(host);
         if (likely(context_param_list && context_param_list->rd))  // Just set the first one
             st = context_param_list->rd->rrdset;
+        else {
+            if (!chart_label_key)
+                sql_build_context_param_list(&context_param_list, host, context, NULL);
+        }
     }
     else {
         st = rrdset_find(host, chart);
@@ -518,6 +524,17 @@ inline int web_client_api_request_v1_data(RRDHOST *host, struct web_client *w, c
             st = rrdset_find_byname(host, chart);
         if (likely(st))
             st->last_accessed_time = now_realtime_sec();
+        else
+            sql_build_context_param_list(&context_param_list, host, NULL, chart);
+    }
+
+    if (!st) {
+        if (likely(context_param_list && context_param_list->rd && context_param_list->rd->rrdset))
+            st = context_param_list->rd->rrdset;
+        else {
+            free_context_param_list(&context_param_list);
+            context_param_list = NULL;
+        }
     }
 
     if (!st && !context_param_list) {
@@ -961,6 +978,11 @@ inline int web_client_api_request_v1_info_fill_buffer(RRDHOST *host, BUFFER *wb)
 
 #ifdef ENABLE_ACLK
     buffer_strcat(wb, "\t\"cloud-available\": true,\n");
+#ifdef ACLK_NG
+    buffer_strcat(wb, "\t\"aclk-implementation\": \"Next Generation\",\n");
+#else
+    buffer_strcat(wb, "\t\"aclk-implementation\": \"legacy\",\n");
+#endif
 #else
     buffer_strcat(wb, "\t\"cloud-available\": false,\n");
 #endif