Add parallel node collection functionality, via the `parallel_mode=al…

…l` config option

ds-collector/collector.conf.in

@@ -79,6 +79,13 @@
 #
 #hostName=""
 
+# if you want nodes to be collected in parallel, specify
+#  all – for collecting all nodes at the same time, fastest and dangerous
+#  rack – not yet supported
+#  none – every node sequentially, the default behaviour
+#
+#parallel_mode="none"
+
 # the provided issue id to reference the artifacts
 # a generic issueId will be generated if not provided here
 #

ds-collector/ds-collector

@@ -929,9 +929,20 @@ get_infos() {
     for host in ${cassandraNodes} ; do
       hostName=$host
       if [[ "$hostName" != \#* ]] && [ "$hostName" ] && [[ ! " ${skipNodes[*]} " =~ " $hostName " ]]; then
-        get_info
+        if [ "$parallel_mode" = "all" ]; then
+          get_info 2>&1 > "${host}.log" &
+        else
+          get_info
+        fi
       fi
     done
+    if [ "$parallel_mode" = "all" ]; then
+      wait
+      for host in ${cassandraNodes} ; do
+        echo "\n === ${host} ===\n"
+        awk -v host="${host}" '{print host " " $0}' "${host}.log"
+      done
+    fi
   else
     get_info
   fi