Add missing comma to demosites.html

[netdata.git] / src / backends.c

diff --git a/src/backends.c b/src/backends.c
index 9b91b7f0a5ddac65bfc9b226977820045e0253d8..844c334e8df40637c78fe9ea08d5ebd192d86cbb 100644 (file)
--- a/src/backends.c
+++ b/src/backends.c
@@ -8,9 +8,8 @@ static inline calculated_number backend_calculate_value_from_stored_data(RRDSET
     time_t first_t = rrdset_first_entry_t(st);
     time_t last_t = rrdset_last_entry_t(st);
 
-    if(unlikely(before - after < st->update_every && after != after - after % st->update_every))
-        // when st->update_every is bigger than the frequency we send data to backend
-        // skip the iterations that are not aligned to the database
+    if(unlikely(before < first_t || after > last_t))
+        // the chart has not been updated in the wanted timeframe
         return NAN;
 
     // align the time-frame
@@ -349,6 +348,10 @@ void *backends_main(void *ptr) {
         //fprintf(stderr, "\nBACKEND BEGIN:\n%s\nBACKEND END\n", buffer_tostring(b)); // FIXME
         //fprintf(stderr, "after = %lu, before = %lu\n", after, before);
 
+        // prepare for the next iteration
+        // to add incrementally data to buffer
+        after = before;
+
         // ------------------------------------------------------------------------
         // if we are connected, receive a response, without blocking
 
@@ -454,12 +457,6 @@ void *backends_main(void *ptr) {
                 close(sock);
                 sock = -1;
             }
-
-            // either the buffer is empty
-            // or is holding the data we couldn't send
-            // so, make sure the next iteration will continue
-            // from where we are now
-            after = before;
         }
         else {
             error("Failed to update database backend '%s'", destination);