diff --git a/scripts/base/frameworks/measurement/cluster.bro b/scripts/base/frameworks/measurement/cluster.bro
index 9c35b85b32..481b306417 100644
--- a/scripts/base/frameworks/measurement/cluster.bro
+++ b/scripts/base/frameworks/measurement/cluster.bro
@@ -33,70 +33,78 @@ export {
 	## The goal for this option is also meant to be temporary.
 	const enable_intermediate_updates = T &redef;
 
-	# Event sent by the manager in a cluster to initiate the 
-	# collection of metrics values for a measurement.
+	## Event sent by the manager in a cluster to initiate the 
+	## collection of metrics values for a measurement.
 	global cluster_measurement_request: event(uid: string, mid: string);
 
-	# Event sent by nodes that are collecting metrics after receiving
-	# a request for the metric measurement from the manager.
+	## Event sent by nodes that are collecting metrics after receiving
+	## a request for the metric measurement from the manager.
 	global cluster_measurement_response: event(uid: string, mid: string, data: ResultTable, done: bool);
 
-	# This event is sent by the manager in a cluster to initiate the
-	# collection of a single key value from a measurement.  It's typically
-	# used to get intermediate updates before the break interval triggers
-	# to speed detection of a value crossing a threshold.
+	## This event is sent by the manager in a cluster to initiate the
+	## collection of a single key value from a measurement.  It's typically
+	## used to get intermediate updates before the break interval triggers
+	## to speed detection of a value crossing a threshold.
 	global cluster_key_request: event(uid: string, mid: string, key: Key);
 
-	# This event is sent by nodes in response to a 
-	# :bro:id:`Measurement::cluster_key_request` event.
-	global cluster_key_response: event(uid: string, mid: string, key: Key, result: ResultTable);
+	## This event is sent by nodes in response to a 
+	## :bro:id:`Measurement::cluster_key_request` event.
+	global cluster_key_response: event(uid: string, mid: string, key: Key, result: Result);
 
-	# This is sent by workers to indicate that they crossed the percent of the 
-	# current threshold by the percentage defined globally in 
-	# :bro:id:`Measurement::cluster_request_global_view_percent`
+	## This is sent by workers to indicate that they crossed the percent of the 
+	## current threshold by the percentage defined globally in 
+	## :bro:id:`Measurement::cluster_request_global_view_percent`
 	global cluster_key_intermediate_response: event(mid: string, key: Measurement::Key);
 
-	# This event is scheduled internally on workers to send result chunks.
-	global send_data: event(uid: string, id: string, measurement_name: string, data: ResultTable);
+	## This event is scheduled internally on workers to send result chunks.
+	global send_data: event(uid: string, mid: string, data: ResultTable);
 }
 
 # Add events to the cluster framework to make this work.
 redef Cluster::manager2worker_events += /Measurement::cluster_(measurement_request|key_request)/;
+redef Cluster::manager2worker_events += /Measurement::new_measurement/;
 redef Cluster::worker2manager_events += /Measurement::cluster_(measurement_response|key_response|key_intermediate_response)/;
 
 @if ( Cluster::local_node_type() != Cluster::MANAGER )
-# This variable is maintained to know what keysthey have recently sent as 
+# This variable is maintained to know what keys have recently sent as 
 # intermediate updates so they don't overwhelm their manager. The count that is
 # yielded is the number of times the percentage threshold has been crossed and
 # an intermediate result has been received.
-global recent_global_view_keys: table[string, string, Key] of count &create_expire=1min &default=0;
+global recent_global_view_keys: table[string, Key] of count &create_expire=1min &default=0;
+
+event bro_init() &priority=-100
+	{
+	# The manager is the only host allowed to track these.
+	measurement_store = table();
+	reducer_store = table();
+	}
 
 # This is done on all non-manager node types in the event that a metric is 
 # being collected somewhere other than a worker.
-function data_added(measurement: Filter, key: Key, val: Result)
+function data_added(m: Measurement, key: Key, result: Result)
 	{
 	# If an intermediate update for this value was sent recently, don't send
 	# it again.
-	if ( [measurement$id, measurement$name, key] in recent_global_view_keys )
+	if ( [m$id, key] in recent_global_view_keys )
 		return;
 
 	# If val is 5 and global view % is 0.1 (10%), pct_val will be 50.  If that
 	# crosses the full threshold then it's a candidate to send as an 
 	# intermediate update.
 	if ( enable_intermediate_updates && 
-	     check_thresholds(measurement, key, val, cluster_request_global_view_percent) )
+	     check_thresholds(m, key, result, cluster_request_global_view_percent) )
 		{
 		# kick off intermediate update
-		event Measurement::cluster_key_intermediate_response(measurement$id, measurement$name, key);
-		++recent_global_view_keys[measurement$id, measurement$name, key];
+		event Measurement::cluster_key_intermediate_response(m$id, key);
+		++recent_global_view_keys[m$id, key];
 		}
 	}
 
-event Measurement::send_data(uid: string, id: string, data: ResultTable)
+event Measurement::send_data(uid: string, mid: string, data: ResultTable)
 	{
 	#print fmt("WORKER %s: sending data for uid %s...", Cluster::node, uid);
-	
-	local local_data: ResultTable;
+
+	local local_data: ResultTable = table();
 	local num_added = 0;
 	for ( key in data )
 		{
@@ -114,9 +122,9 @@ event Measurement::send_data(uid: string, id: string, data: ResultTable)
 	if ( |data| == 0 )
 		done = T;
 	
-	event Measurement::cluster_measurement_response(uid, local_data, done);
+	event Measurement::cluster_measurement_response(uid, mid, local_data, done);
 	if ( ! done )
-		event Measurement::send_data(uid, mid, data);
+		schedule 0.01 sec { Measurement::send_data(uid, mid, data) };
 	}
 
 event Measurement::cluster_measurement_request(uid: string, mid: string)
@@ -128,12 +136,13 @@ event Measurement::cluster_measurement_request(uid: string, mid: string)
 	
 	# Lookup the actual measurement and reset it, the reference to the data
 	# currently stored will be maintained internally by the send_data event.
-	reset(measurement_store[mid]);
+	if ( mid in measurement_store )
+		reset(measurement_store[mid]);
 	}
 	
 event Measurement::cluster_key_request(uid: string, mid: string, key: Key)
 	{
-	if ( [mid] in result_store && key in result_store[mid] )
+	if ( mid in result_store && key in result_store[mid] )
 		{
 		#print fmt("WORKER %s: received the cluster_key_request event for %s=%s.", Cluster::node, key2str(key), data);
 		event Measurement::cluster_key_response(uid, mid, key, result_store[mid][key]);
@@ -142,7 +151,7 @@ event Measurement::cluster_key_request(uid: string, mid: string, key: Key)
 		{
 		# We need to send an empty response if we don't have the data so that the manager
 		# can know that it heard back from all of the workers.
-		event Measurement::cluster_key_response(uid, mid, key, [$begin=network_time(), $end=network_time()]);
+		event Measurement::cluster_key_response(uid, mid, key, table());
 		}
 	}
 
@@ -152,62 +161,70 @@ event Measurement::cluster_key_request(uid: string, mid: string, key: Key)
 @if ( Cluster::local_node_type() == Cluster::MANAGER )
 
 # This variable is maintained by manager nodes as they collect and aggregate 
-# results.  It's index on a uid.
+# results.  
+# Index on a uid.
 global measurement_results: table[string] of ResultTable &read_expire=1min;
 
 # This variable is maintained by manager nodes to track how many "dones" they
 # collected per collection unique id.  Once the number of results for a uid 
 # matches the number of peer nodes that results should be coming from, the 
 # result is written out and deleted from here.
+# Indexed on a uid.
 # TODO: add an &expire_func in case not all results are received.
 global done_with: table[string] of count &read_expire=1min &default=0;
 
 # This variable is maintained by managers to track intermediate responses as 
-# they are getting a global view for a certain key. Indexed on a uid.
+# they are getting a global view for a certain key. 
+# Indexed on a uid.
 global key_requests: table[string] of Result &read_expire=1min;
 
 # This variable is maintained by managers to prevent overwhelming communication due
 # to too many intermediate updates.  Each measurement is tracked separately so that 
-# one metric won't overwhelm and degrade other quieter metrics. Indexed on a 
-# measurement id.
+# one won't overwhelm and degrade other quieter measurements. 
+# Indexed on a measurement id.
 global outstanding_global_views: table[string] of count &default=0;
 
+const zero_time = double_to_time(0.0);
 # Managers handle logging.
-event Measurement::finish_period(m: Measurement)
+event Measurement::finish_epoch(m: Measurement)
 	{
-	#print fmt("%.6f MANAGER: breaking %s measurement for %s metric", network_time(), measurement$name, measurement$id);
-	local uid = unique_id("");
-	
-	if ( uid in measurement_results )
-		delete measurement_results[uid];
-	measurement_results[uid] = table();
-	
-	# Request data from peers.
-	event Measurement::cluster_measurement_request(uid, m$id);
-	# Schedule the next finish_period event.
-	schedule m$epoch { Measurement::finish_period(m) };
+	if ( network_time() > zero_time )
+		{
+		#print fmt("%.6f MANAGER: breaking %s measurement for %s metric", network_time(), measurement$name, measurement$id);
+		local uid = unique_id("");
+		
+		if ( uid in measurement_results )
+			delete measurement_results[uid];
+		measurement_results[uid] = table();
+		
+		# Request data from peers.
+		event Measurement::cluster_measurement_request(uid, m$id);
+		}
+
+	# Schedule the next finish_epoch event.
+	schedule m$epoch { Measurement::finish_epoch(m) };
 	}
 
 # This is unlikely to be called often, but it's here in case there are measurements
 # being collected by managers.
 function data_added(m: Measurement, key: Key, result: Result)
 	{
-	#if ( check_thresholds(m, key, val, 1.0) )
-	#	threshold_crossed(m, key, val);
+	if ( check_thresholds(m, key, result, 1.0) )
+		threshold_crossed(m, key, result);
 	}
 	
 event Measurement::cluster_key_response(uid: string, mid: string, key: Key, result: Result)
 	{
-	#print fmt("%0.6f MANAGER: receiving key data from %s - %s=%s", network_time(), get_event_peer()$descr, key2str(key), val);
+	#print fmt("%0.6f MANAGER: receiving key data from %s - %s=%s", network_time(), get_event_peer()$descr, key2str(key), result);
 
 	# We only want to try and do a value merge if there are actually measured datapoints
 	# in the Result.
-	if ( result$num > 0 && uid in key_requests )
-		key_requests[uid] = compose_resultvals(key_requests[uid], result);
+	if ( uid in key_requests )
+		key_requests[uid] = compose_results(key_requests[uid], result);
 	else
 		key_requests[uid] = result;
 
-	# Mark that this worker is done.
+	# Mark that a worker is done.
 	++done_with[uid];
 
 	#print fmt("worker_count:%d :: done_with:%d", Cluster::worker_count, done_with[uid]);
@@ -232,7 +249,7 @@ event Measurement::cluster_key_intermediate_response(mid: string, key: Key)
 	#print fmt("MANAGER: receiving intermediate key data from %s", get_event_peer()$descr);
 	#print fmt("MANAGER: requesting key data for %s", key2str(key));
 
-	if ( [mid] in outstanding_global_views &&
+	if ( mid in outstanding_global_views &&
 	     |outstanding_global_views[mid]| > max_outstanding_global_views )
 		{
 		# Don't do this intermediate update.  Perhaps at some point in the future 
@@ -261,7 +278,7 @@ event Measurement::cluster_measurement_response(uid: string, mid: string, data:
 	for ( key in data )
 		{
 		if ( key in local_data )
-			local_data[key] = compose_resultvals(local_data[key], data[key]);
+			local_data[key] = compose_results(local_data[key], data[key]);
 		else
 			local_data[key] = data[key];
 
@@ -280,8 +297,8 @@ event Measurement::cluster_measurement_response(uid: string, mid: string, data:
 	# If the data has been collected from all peers, we are done and ready to finish.
 	if ( Cluster::worker_count == done_with[uid] )
 		{
-		if ( m?$period_finished )
-			m$period_finished(local_data);
+		if ( m?$epoch_finished )
+			m$epoch_finished(local_data);
 
 		# Clean up
 		delete measurement_results[uid];
@@ -291,4 +308,9 @@ event Measurement::cluster_measurement_response(uid: string, mid: string, data:
 		}
 	}
 
+event remote_connection_handshake_done(p: event_peer) &priority=5
+	{
+	send_id(p, "Measurement::measurement_store");
+	send_id(p, "Measurement::reducer_store");
+	}
 @endif
diff --git a/scripts/base/frameworks/measurement/main.bro b/scripts/base/frameworks/measurement/main.bro
index a7f22ed3b7..a8e2950f5a 100644
--- a/scripts/base/frameworks/measurement/main.bro
+++ b/scripts/base/frameworks/measurement/main.bro
@@ -19,21 +19,21 @@ export {
 		## value in a Host header.  This is an example of a non-host based
 		## metric since multiple IP addresses could respond for the same Host
 		## header value.
-		str:          string &optional;
+		str:  string &optional;
 	
 		## Host is the value to which this metric applies.
-		host:         addr &optional;
-	} &log;
+		host: addr &optional;
+	};
 	
 	## Represents data being added for a single metric data point.
 	## Only supply a single value here at a time.
 	type DataPoint: record {
 		## Count value.
-		num:       count       &optional;
+		num:  count  &optional;
 		## Double value.
-		dbl:       double      &optional;
+		dbl:  double &optional;
 		## String value.
-		str:       string      &optional;
+		str:  string &optional;
 	};
 
 	type Reducer: record {
@@ -45,7 +45,7 @@ export {
 		
 		## A predicate so that you can decide per key if you would like
 		## to accept the data being inserted.
-		pred:           function(key: Measurement::Key, data: Measurement::DataPoint): bool &optional;
+		pred:           function(key: Measurement::Key, point: Measurement::DataPoint): bool &optional;
 		
 		## A function to normalize the key.  This can be used to aggregate or
 		## normalize the entire key.
@@ -54,44 +54,45 @@ export {
 
 	## Value calculated for a data point stream fed into a reducer.
 	## Most of the fields are added by plugins.
-	type Result: record {
+	type ResultVal: record {
 		## The time when the first data point was added to this result value.
-		begin:    time          &log;
+		begin:  time;
 
 		## The time when the last data point was added to this result value.
-		end:      time          &log;
+		end:    time;
 
 		## The number of measurements received.
-		num:      count         &log &default=0;
+		num:    count &default=0;
 	};
 
-	## Type to store a table of measurement results.  First table is
-	## indexed on the measurement Key and the enclosed table is 
-	## indexed on the data id that the Key was relevant for.
-	type ResultTable: table[Key] of table[string] of Result;
+	## Type to store results for multiple reducers.
+	type Result: table[string] of ResultVal;
 
-	## Filters define how the data from a metric is aggregated and handled.  
-	## Filters can be used to set how often the measurements are cut 
-	## and logged or how the data within them is aggregated.
+	## Type to store a table of measurement results indexed by the measurement key.
+	type ResultTable: table[Key] of Result;
+
+	## Measurements represent an aggregation of reducers along with 
+	## mechanisms to handle various situations like the epoch ending
+	## or thresholds being crossed.
 	type Measurement: record {
 		## The interval at which this filter should be "broken" and the
-		## callback called.  The counters are also reset to zero at 
-		## this time so any threshold based detection needs to be set to a 
-		## number that should be expected to happen within this period.
+		## '$epoch_finished' callback called.  The results are also reset 
+		## at this time so any threshold based detection needs to be set to a 
+		## number that should be expected to happen within this epoch.
 		epoch:              interval;
 
 		## The reducers for the measurement indexed by data id.
 		reducers:           set[Reducer];
 
-		## Optionally provide a function to calculate a value from the Result 
+		## Provide a function to calculate a value from the :bro:see:`Result`
 		## structure which will be used for thresholding.
-		threshold_val:      function(result: Measurement::Result): count  &optional;
+		threshold_val:      function(key: Measurement::Key, result: Measurement::Result): count &optional;
 
 		## The threshold value for calling the $threshold_crossed callback.
-		threshold:          count                    &optional;
+		threshold:          count             &optional;
 		
 		## A series of thresholds for calling the $threshold_crossed callback.
-		threshold_series:   vector of count          &optional;
+		threshold_series:   vector of count   &optional;
 
 		## A callback that is called when a threshold is crossed.
 		threshold_crossed:  function(key: Measurement::Key, result: Measurement::Result) &optional;
@@ -100,22 +101,21 @@ export {
 		## It's best to not access any global state outside of the variables
 		## given to the callback because there is no assurance provided as to
 		## where the callback will be executed on clusters.
-		period_finished:    function(data: Measurement::ResultTable) &optional;
+		epoch_finished:    function(rt: Measurement::ResultTable) &optional;
 	};
 	
 	## Create a measurement.
 	global create: function(m: Measurement::Measurement);
 
-	## Add data into a metric.  This should be called when
-	## a script has measured some point value and is ready to increment the
-	## counters.
+	## Add data into a data point stream.  This should be called when
+	## a script has measured some point value.
 	##
-	## id: The metric identifier that the data represents.
+	## id: The stream identifier that the data point represents.
 	##
-	## key: The metric key that the value is to be added to.
+	## key: The measurement key that the value is to be added to.
 	##
-	## data: The data point to send into the stream.
-	global add_data: function(id: string, key: Measurement::Key, data: Measurement::DataPoint);
+	## point: The data point to send into the stream.
+	global add_data: function(id: string, key: Measurement::Key, point: Measurement::DataPoint);
 
 	## Helper function to represent a :bro:type:`Measurement::Key` value as 
 	## a simple string.
@@ -124,15 +124,19 @@ export {
 	##
 	## Returns: A string representation of the metric key.
 	global key2str: function(key: Measurement::Key): string;
-	
+
+	## This event is generated for each new measurement that is created.
+	##
+	## m: The record which describes a measurement.
+	global new_measurement: event(m: Measurement);
 }
 
 redef record Reducer += {
-	# Internal use only.  Measurement ID.
+	# Internal use only.  Provides a reference back to the related Measurement by it's ID.
 	mid: string &optional;
 };
 
-redef record Result += {
+type Thresholding: record {
 	# Internal use only.  Indicates if a simple threshold was already crossed.
 	is_threshold_crossed: bool &default=F;
 
@@ -143,16 +147,22 @@ redef record Result += {
 redef record Measurement += {
 	# Internal use only (mostly for cluster coherency).
 	id: string &optional;
+
+	# Internal use only.  For tracking tresholds per key.
+	threshold_tracker: table[Key] of Thresholding &optional;
 };
 
-# Store of reducers indexed on the data id.
+# Store of measurements indexed on the measurement id.
+global measurement_store: table[string] of Measurement = table();
+
+# Store of reducers indexed on the data point stream id.
 global reducer_store: table[string] of set[Reducer] = table();
 
 # Store of results indexed on the measurement id.
 global result_store: table[string] of ResultTable = table();
 
-# Store of measurements indexed on the measurement id.
-global measurement_store: table[string] of Measurement = table();
+# Store of threshold information.
+global thresholds_store: table[string, Key] of bool = table();
 
 # This is called whenever
 # key values are updated and the new val is given as the `val` argument.
@@ -161,13 +171,15 @@ global measurement_store: table[string] of Measurement = table();
 global data_added: function(m: Measurement, key: Key, result: Result);
 
 # Prototype the hook point for plugins to do calculations.
-global add_to_reducer: hook(r: Reducer, val: double, data: DataPoint, result: Result);
+global add_to_reducer_hook: hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal);
+# Prototype the hook point for plugins to initialize any result values.
+global init_resultval_hook: hook(r: Reducer, rv: ResultVal);
 # Prototype the hook point for plugins to merge Results.
-global compose_resultvals_hook: hook(result: Result, rv1: Result, rv2: Result);
+global compose_resultvals_hook: hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal);
 
 # Event that is used to "finish" measurements and adapt the measurement
 # framework for clustered or non-clustered usage.
-global finish_period: event(m: Measurement);
+global finish_epoch: event(m: Measurement);
 
 function key2str(key: Key): string
 	{
@@ -176,12 +188,19 @@ function key2str(key: Key): string
 		out = fmt("%shost=%s", out, key$host);
 	if ( key?$str )
 		out = fmt("%s%sstr=%s", out, |out|==0 ? "" : ", ", key$str);
-	return fmt("metric_key(%s)", out);
+	return fmt("measurement_key(%s)", out);
 	}
 
-function compose_resultvals(rv1: Result, rv2: Result): Result
+function init_resultval(r: Reducer): ResultVal
 	{
-	local result: Result;
+	local rv: ResultVal = [$begin=network_time(), $end=network_time()];
+	hook init_resultval_hook(r, rv);
+	return rv;
+	}
+
+function compose_resultvals(rv1: ResultVal, rv2: ResultVal): ResultVal
+	{
+	local result: ResultVal;
 
 	# Merge $begin (take the earliest one)
 	result$begin = (rv1$begin < rv2$begin) ? rv1$begin : rv2$begin;
@@ -192,18 +211,40 @@ function compose_resultvals(rv1: Result, rv2: Result): Result
 	# Merge $num
 	result$num = rv1$num + rv2$num;
 
-	# Merge $threshold_series_index
-	result$threshold_series_index = (rv1$threshold_series_index > rv2$threshold_series_index) ? rv1$threshold_series_index : rv2$threshold_series_index;
-
-	# Merge $is_threshold_crossed
-	if ( rv1$is_threshold_crossed || rv2$is_threshold_crossed )
-		result$is_threshold_crossed = T;
-
 	hook compose_resultvals_hook(result, rv1, rv2);
 
 	return result;
 	}
+
+function compose_results(r1: Result, r2: Result): Result
+	{
+	local result: Result = table();
+
+	if ( |r1| > |r2| )
+		{
+		for ( data_id in r1 )
+			{
+			if ( data_id in r2 )
+				result[data_id] = compose_resultvals(r1[data_id], r2[data_id]);
+			else
+				result[data_id] = r1[data_id];
+			}
+		}
+	else
+		{
+		for ( data_id in r2 )
+			{
+			if ( data_id in r1 )
+				result[data_id] = compose_resultvals(r1[data_id], r2[data_id]);
+			else
+				result[data_id] = r2[data_id];
+			}
+		}
 	
+	return result;
+	}
+
+
 function reset(m: Measurement)
 	{
 	if ( m$id in result_store )
@@ -214,7 +255,10 @@ function reset(m: Measurement)
 
 function create(m: Measurement)
 	{
-	m$id=unique_id("");
+	if ( ! m?$id )
+		m$id=unique_id("");
+	local tmp: table[Key] of Thresholding = table();
+	m$threshold_tracker = tmp;
 	measurement_store[m$id] = m;
 
 	for ( reducer in m$reducers )
@@ -226,20 +270,20 @@ function create(m: Measurement)
 		}
 
 	reset(m);
-	schedule m$epoch { Measurement::finish_period(m) };
+	schedule m$epoch { Measurement::finish_epoch(m) };
 	}
 
-function add_data(data_id: string, key: Key, data: DataPoint)
+function add_data(id: string, key: Key, point: DataPoint)
 	{
 	# Try to add the data to all of the defined reducers.
-	if ( data_id !in reducer_store )
+	if ( id !in reducer_store )
 		return;
 
-	for ( r in reducer_store[data_id] )
+	for ( r in reducer_store[id] )
 		{
 		# If this reducer has a predicate, run the predicate 
 		# and skip this key if the predicate return false.
-		if ( r?$pred && ! r$pred(key, data) )
+		if ( r?$pred && ! r$pred(key, point) )
 			next;
 		
 		if ( r?$normalize_key )
@@ -249,20 +293,21 @@ function add_data(data_id: string, key: Key, data: DataPoint)
 		local results = result_store[m$id];
 		if ( key !in results )
 			results[key] = table();
-		if ( data_id !in results[key] )
-			results[key][data_id] = [$begin=network_time(), $end=network_time()];
+		if ( id !in results[key] )
+			results[key][id] = init_resultval(r);
 
-		local result = results[key][data_id];
-		++result$num;
+		local result = results[key];
+		local result_val = result[id];
+		++result_val$num;
 		# Continually update the $end field.
-		result$end=network_time();
+		result_val$end=network_time();
 
 		# If a string was given, fall back to 1.0 as the value.
 		local val = 1.0;
-		if ( data?$num || data?$dbl )
-			val = data?$dbl ? data$dbl : data$num;
+		if ( point?$num || point?$dbl )
+			val = point?$dbl ? point$dbl : point$num;
 
-		hook add_to_reducer(r, val, data, result);
+		hook add_to_reducer_hook(r, val, point, result_val);
 		data_added(m, key, result);
 		}
 	}
@@ -274,28 +319,37 @@ function check_thresholds(m: Measurement, key: Key, result: Result, modify_pct:
 	if ( ! (m?$threshold || m?$threshold_series) )
 		return F;
 
-	local watch = 0.0;
-	#if ( val?$unique )
-	#	watch = val$unique;
-	#else if ( val?$sum )
-	#	watch = val$sum;
+	if ( key !in m$threshold_tracker )
+		{
+		local tmp: Thresholding;
+		m$threshold_tracker[key] = tmp;
+		}
 
-	if ( m?$threshold_val )
-		watch = m$threshold_val(result);
+	# Add in the extra ResultVals to make threshold_vals easier to write.
+	if ( |m$reducers| != |result| )
+		{
+		for ( reducer in m$reducers )
+			{
+			if ( reducer$stream !in result )
+				result[reducer$stream] = init_resultval(reducer);
+			}
+		}
+
+	local watch = m$threshold_val(key, result);
 
 	if ( modify_pct < 1.0 && modify_pct > 0.0 )
-		watch = watch/modify_pct;
+		watch = double_to_count(floor(watch/modify_pct));
 
-	if ( ! result$is_threshold_crossed &&
-	     m?$threshold && watch >= m$threshold )
+	local tt = m$threshold_tracker[key];
+	if ( m?$threshold && ! tt$is_threshold_crossed && watch >= m$threshold )
 		{
-		# A default threshold was given and the value crossed it.
+		# Value crossed the threshold.
 		return T;
 		}
 
 	if ( m?$threshold_series &&
-	     |m$threshold_series| >= result$threshold_series_index &&
-	     watch >= m$threshold_series[result$threshold_series_index] )
+	     |m$threshold_series| >= tt$threshold_series_index &&
+	     watch >= m$threshold_series[tt$threshold_series_index] )
 		{
 		# A threshold series was given and the value crossed the next 
 		# value in the series.
@@ -307,17 +361,29 @@ function check_thresholds(m: Measurement, key: Key, result: Result, modify_pct:
 
 function threshold_crossed(m: Measurement, key: Key, result: Result)
 	{
+	# If there is no callback, there is no point in any of this.
 	if ( ! m?$threshold_crossed )
 		return;
 
 	#if ( val?$sample_queue )
 	#	val$samples = Queue::get_str_vector(val$sample_queue);
 
+	# Add in the extra ResultVals to make threshold_crossed callbacks easier to write.
+	if ( |m$reducers| != |result| )
+		{
+		for ( reducer in m$reducers )
+			{
+			if ( reducer$stream !in result )
+				result[reducer$stream] = init_resultval(reducer);
+			}
+		}
+
 	m$threshold_crossed(key, result);
-	result$is_threshold_crossed = T;
+	local tt = m$threshold_tracker[key];
+	tt$is_threshold_crossed = T;
 
 	# Bump up to the next threshold series index if a threshold series is being used.
 	if ( m?$threshold_series )
-		++result$threshold_series_index;
+		++tt$threshold_series_index;
 	}
 
diff --git a/scripts/base/frameworks/measurement/non-cluster.bro b/scripts/base/frameworks/measurement/non-cluster.bro
index 7a0a2a2c3e..35ff9dc935 100644
--- a/scripts/base/frameworks/measurement/non-cluster.bro
+++ b/scripts/base/frameworks/measurement/non-cluster.bro
@@ -2,18 +2,18 @@
 
 module Measurement;
 
-event Measurement::finish_period(m: Measurement)
+event Measurement::finish_epoch(m: Measurement)
 	{
 	if ( m$id in result_store )
 		{
 		local data = result_store[m$id];
-		if ( m?$period_finished )
-			m$period_finished(data);
+		if ( m?$epoch_finished )
+			m$epoch_finished(data);
 
 		reset(m);
 		}
-	
-	schedule m$epoch { Measurement::finish_period(m) };
+
+	schedule m$epoch { Measurement::finish_epoch(m) };
 	}
 	
 	
diff --git a/scripts/base/frameworks/measurement/plugins/average.bro b/scripts/base/frameworks/measurement/plugins/average.bro
index 629cb2fc7b..172e8c788d 100644
--- a/scripts/base/frameworks/measurement/plugins/average.bro
+++ b/scripts/base/frameworks/measurement/plugins/average.bro
@@ -7,24 +7,24 @@ export {
 		AVERAGE
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this calculates the average of all values.
-		average: double &log &optional;
+		average: double &optional;
 	};
 }
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
 	{
 	if ( AVERAGE in r$apply )
 		{
-		if ( ! result?$average ) 
-			result$average = val;
+		if ( ! rv?$average )
+			rv$average = val;
 		else
-			result$average += (val - result$average) / result$num;
+			rv$average += (val - rv$average) / rv$num;
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	if ( rv1?$average && rv2?$average )
 		result$average = ((rv1$average*rv1$num) + (rv2$average*rv2$num))/(rv1$num+rv2$num);
diff --git a/scripts/base/frameworks/measurement/plugins/max.bro b/scripts/base/frameworks/measurement/plugins/max.bro
index 5138e3f684..02b536f849 100644
--- a/scripts/base/frameworks/measurement/plugins/max.bro
+++ b/scripts/base/frameworks/measurement/plugins/max.bro
@@ -7,24 +7,24 @@ export {
 		MAX
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this tracks the maximum value given.
-		max:      double        &log &optional;
+		max: double &optional;
 	};
 }
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
 	{
 	if ( MAX in r$apply )
 		{
-		if ( ! result?$max ) 
-			result$max = val;
-		else if ( val > result$max )
-			result$max = val;
+		if ( ! rv?$max ) 
+			rv$max = val;
+		else if ( val > rv$max )
+			rv$max = val;
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	if ( rv1?$max && rv2?$max )
 		result$max = (rv1$max > rv2$max) ? rv1$max : rv2$max;
diff --git a/scripts/base/frameworks/measurement/plugins/min.bro b/scripts/base/frameworks/measurement/plugins/min.bro
index ebdbb39373..944ee9fcb4 100644
--- a/scripts/base/frameworks/measurement/plugins/min.bro
+++ b/scripts/base/frameworks/measurement/plugins/min.bro
@@ -7,24 +7,24 @@ export {
 		MIN
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this tracks the minimum value given.
-		min:      double        &log &optional;
+		min: double &optional;
 	};
 }
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
 	{
 	if ( MIN in r$apply )
 		{
-		if ( ! result?$min ) 
-			result$min = val;
-		else if ( val < result$min )
-			result$min = val;
+		if ( ! rv?$min ) 
+			rv$min = val;
+		else if ( val < rv$min )
+			rv$min = val;
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	if ( rv1?$min && rv2?$min )
 		result$min = (rv1$min < rv2$min) ? rv1$min : rv2$min;
diff --git a/scripts/base/frameworks/measurement/plugins/sample.bro b/scripts/base/frameworks/measurement/plugins/sample.bro
index 3edd92ce13..e0084e88d1 100644
--- a/scripts/base/frameworks/measurement/plugins/sample.bro
+++ b/scripts/base/frameworks/measurement/plugins/sample.bro
@@ -8,7 +8,7 @@ export {
 		samples: count &default=0;
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## A sample of something being measured.  This is helpful in 
 		## some cases for collecting information to do further detection
 		## or better logging for forensic purposes.
@@ -16,24 +16,24 @@ export {
 	};
 }
 
-redef record Result += {
+redef record ResultVal += {
 	# Internal use only.  This is the queue where samples
 	# are maintained since the queue is self managing for
 	# the number of samples requested.
 	sample_queue: Queue::Queue &optional;
 };
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
 	{
 	if ( r$samples > 0 )
 		{
-		if ( ! result?$sample_queue )
-			result$sample_queue = Queue::init([$max_len=r$samples]);
-		Queue::push(result$sample_queue, data$str);
+		if ( ! rv?$sample_queue )
+			rv$sample_queue = Queue::init([$max_len=r$samples]);
+		Queue::push(rv$sample_queue, data$str);
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	# Merge $sample_queue
 	if ( rv1?$sample_queue && rv2?$sample_queue )
diff --git a/scripts/base/frameworks/measurement/plugins/std-dev.bro b/scripts/base/frameworks/measurement/plugins/std-dev.bro
index 6d13d7fc51..bcf2cdcb00 100644
--- a/scripts/base/frameworks/measurement/plugins/std-dev.bro
+++ b/scripts/base/frameworks/measurement/plugins/std-dev.bro
@@ -9,28 +9,31 @@ export {
 		STD_DEV
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this calculates the standard deviation.
-		std_dev:  double &log &optional;
+		std_dev: double &optional;
 	};
 }
 
+function calc_std_dev(rv: ResultVal)
+	{
+	if ( rv?$variance )
+		rv$std_dev = sqrt(rv$variance);
+	}
+
 # This depends on the variance plugin which uses priority -5
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal) &priority=-10
 	{
 	if ( STD_DEV in r$apply )
 		{
-		if ( result?$variance )
-			result$std_dev = sqrt(result$variance);
+		if ( rv?$variance )
+			calc_std_dev(rv);
+		else
+			rv$std_dev = 0.0;
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result) &priority=-10
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal) &priority=-10
 	{
-	if ( rv1?$sum || rv2?$sum )
-		{
-		result$sum = rv1?$sum ? rv1$sum : 0;
-		if ( rv2?$sum )
-			result$sum += rv2$sum;
-		}
-	}
\ No newline at end of file
+	calc_std_dev(result);
+	}
diff --git a/scripts/base/frameworks/measurement/plugins/sum.bro b/scripts/base/frameworks/measurement/plugins/sum.bro
index 7e8b6ff692..8f989317d8 100644
--- a/scripts/base/frameworks/measurement/plugins/sum.bro
+++ b/scripts/base/frameworks/measurement/plugins/sum.bro
@@ -8,23 +8,32 @@ export {
 		SUM
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this tracks the sum of all values.
-		sum:      double        &log &optional;
+		sum: double &default=0.0;
 	};
+
+	type threshold_function: function(key: Measurement::Key, result: Measurement::Result): count;
+	global sum_threshold: function(data_id: string): threshold_function;
 }
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+function sum_threshold(data_id: string): threshold_function
 	{
-	if ( SUM in r$apply )
+	return function(key: Measurement::Key, result: Measurement::Result): count
 		{
-		if ( ! result?$sum ) 
-			result$sum = 0;
-		result$sum += val;
-		}
+		print fmt("data_id: %s", data_id);
+		print result;
+		return double_to_count(result[data_id]$sum);
+		};
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
+	{
+	if ( SUM in r$apply )
+		rv$sum += val;
+	}
+
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	if ( rv1?$sum || rv2?$sum )
 		{
diff --git a/scripts/base/frameworks/measurement/plugins/unique.bro b/scripts/base/frameworks/measurement/plugins/unique.bro
index 4f30206a4e..5160f0df91 100644
--- a/scripts/base/frameworks/measurement/plugins/unique.bro
+++ b/scripts/base/frameworks/measurement/plugins/unique.bro
@@ -7,14 +7,14 @@ export {
 		UNIQUE
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## If cardinality is being tracked, the number of unique
 		## items is tracked here.
-		unique: count &log &optional;
+		unique: count &optional;
 	};
 }
 
-redef record Result += {
+redef record ResultVal += {
 	# Internal use only.  This is not meant to be publically available 
 	# because we don't want to trust that we can inspect the values 
 	# since we will like move to a probalistic data structure in the future.
@@ -22,18 +22,18 @@ redef record Result += {
 	unique_vals: set[DataPoint] &optional;
 };
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal)
 	{
 	if ( UNIQUE in r$apply )
 		{
-		if ( ! result?$unique_vals ) 
-			result$unique_vals=set();
-		add result$unique_vals[data];
-		result$unique = |result$unique_vals|;
+		if ( ! rv?$unique_vals ) 
+			rv$unique_vals=set();
+		add rv$unique_vals[data];
+		rv$unique = |rv$unique_vals|;
 		}
 	}
 
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result)
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
 	{
 	if ( rv1?$unique_vals || rv2?$unique_vals )
 		{
diff --git a/scripts/base/frameworks/measurement/plugins/variance.bro b/scripts/base/frameworks/measurement/plugins/variance.bro
index 07a7293539..dc94f39840 100644
--- a/scripts/base/frameworks/measurement/plugins/variance.bro
+++ b/scripts/base/frameworks/measurement/plugins/variance.bro
@@ -8,40 +8,40 @@ export {
 		VARIANCE
 	};
 
-	redef record Result += {
+	redef record ResultVal += {
 		## For numeric data, this calculates the variance.
-		variance: double &log &optional;
+		variance: double &optional;
 	};
 }
 
-redef record Result += {
+redef record ResultVal += {
 	# Internal use only.  Used for incrementally calculating variance.
 	prev_avg: double &optional;
 
 	# Internal use only.  For calculating incremental variance.
-	var_s: double &optional;
+	var_s: double &default=0.0;
 };
 
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result)
+function calc_variance(rv: ResultVal)
 	{
-	if ( VARIANCE in r$apply )
-		result$prev_avg = result$average;
+	rv$variance = (rv$num > 1) ? rv$var_s/(rv$num-1) : 0.0;
 	}
 
 # Reduced priority since this depends on the average
-hook add_to_reducer(r: Reducer, val: double, data: DataPoint, result: Result) &priority=-5
+hook add_to_reducer_hook(r: Reducer, val: double, data: DataPoint, rv: ResultVal) &priority=-5
 	{
 	if ( VARIANCE in r$apply )
 		{
-		if ( ! result?$var_s )
-			result$var_s = 0.0;
-		result$var_s += (val - result$prev_avg) * (val - result$average);
-		result$variance = (val > 0) ? result$var_s/val : 0.0;
+		if ( rv$num > 1 )
+			rv$var_s += ((val - rv$prev_avg) * (val - rv$average));
+
+		calc_variance(rv);
+		rv$prev_avg = rv$average;
 		}
 	}
 
 # Reduced priority since this depends on the average
-hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result) &priority=-5
+hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal) &priority=-5
 	{
 	if ( rv1?$var_s && rv2?$var_s )
 		{
@@ -62,4 +62,6 @@ hook compose_resultvals_hook(result: Result, rv1: Result, rv2: Result) &priority
 		result$prev_avg = rv1$prev_avg;
 	else if ( rv2?$prev_avg )
 		result$prev_avg = rv2$prev_avg;
+
+	calc_variance(result);
 	}
\ No newline at end of file
diff --git a/testing/btest/Baseline/scripts.base.frameworks.measurement.basic-cluster/manager-1..stdout b/testing/btest/Baseline/scripts.base.frameworks.measurement.basic-cluster/manager-1..stdout
new file mode 100644
index 0000000000..ea8904d2e6
--- /dev/null
+++ b/testing/btest/Baseline/scripts.base.frameworks.measurement.basic-cluster/manager-1..stdout
@@ -0,0 +1,4 @@
+Host: 6.5.4.3 - num:2 - sum:6.0 - avg:3.0 - max:5.0 - min:1.0 - var:8.0 - std_dev:2.8 - unique:2
+Host: 10.10.10.10 - num:1 - sum:5.0 - avg:5.0 - max:5.0 - min:5.0 - var:0.0 - std_dev:0.0 - unique:1
+Host: 1.2.3.4 - num:9 - sum:437.0 - avg:48.6 - max:95.0 - min:3.0 - var:758.8 - std_dev:27.5 - unique:8
+Host: 7.2.1.5 - num:2 - sum:145.0 - avg:72.5 - max:91.0 - min:54.0 - var:684.5 - std_dev:26.2 - unique:2
diff --git a/testing/btest/Baseline/scripts.base.frameworks.measurement.basic/.stdout b/testing/btest/Baseline/scripts.base.frameworks.measurement.basic/.stdout
new file mode 100644
index 0000000000..208b6103b7
--- /dev/null
+++ b/testing/btest/Baseline/scripts.base.frameworks.measurement.basic/.stdout
@@ -0,0 +1,3 @@
+Host: 6.5.4.3 - num:1 - sum:2.0 - var:0.0 - avg:2.0 - max:2.0 - min:2.0 - std_dev:0.0 - unique:1
+Host: 1.2.3.4 - num:5 - sum:221.0 - var:1144.2 - avg:44.2 - max:94.0 - min:5.0 - std_dev:33.8 - unique:4
+Host: 7.2.1.5 - num:1 - sum:1.0 - var:0.0 - avg:1.0 - max:1.0 - min:1.0 - std_dev:0.0 - unique:1
diff --git a/testing/btest/Baseline/scripts.base.frameworks.measurement.cluster-intermediate-update/manager-1..stdout b/testing/btest/Baseline/scripts.base.frameworks.measurement.cluster-intermediate-update/manager-1..stdout
new file mode 100644
index 0000000000..2a53389dc3
--- /dev/null
+++ b/testing/btest/Baseline/scripts.base.frameworks.measurement.cluster-intermediate-update/manager-1..stdout
@@ -0,0 +1 @@
+A test metric threshold was crossed with a value of: 100.0
diff --git a/testing/btest/Baseline/scripts.base.frameworks.measurement.thresholding/.stdout b/testing/btest/Baseline/scripts.base.frameworks.measurement.thresholding/.stdout
new file mode 100644
index 0000000000..09c65c3864
--- /dev/null
+++ b/testing/btest/Baseline/scripts.base.frameworks.measurement.thresholding/.stdout
@@ -0,0 +1,6 @@
+THRESHOLD_SERIES: hit a threshold series value at 3 for measurement_key(host=1.2.3.4)
+THRESHOLD: hit a threshold value at 6 for measurement_key(host=1.2.3.4)
+THRESHOLD_SERIES: hit a threshold series value at 6 for measurement_key(host=1.2.3.4)
+THRESHOLD: hit a threshold value at 1001 for measurement_key(host=7.2.1.5)
+THRESHOLD_SERIES: hit a threshold series value at 1001 for measurement_key(host=7.2.1.5)
+THRESHOLD WITH RATIO BETWEEN REDUCERS: hit a threshold value at 55x for measurement_key(host=7.2.1.5)
diff --git a/testing/btest/scripts/base/frameworks/measurement/basic-cluster.bro b/testing/btest/scripts/base/frameworks/measurement/basic-cluster.bro
new file mode 100644
index 0000000000..e2f5e4e7d5
--- /dev/null
+++ b/testing/btest/scripts/base/frameworks/measurement/basic-cluster.bro
@@ -0,0 +1,83 @@
+# @TEST-SERIALIZE: comm
+#
+# @TEST-EXEC: btest-bg-run manager-1 BROPATH=$BROPATH:.. CLUSTER_NODE=manager-1 bro %INPUT
+# @TEST-EXEC: sleep 1
+# @TEST-EXEC: btest-bg-run worker-1  BROPATH=$BROPATH:.. CLUSTER_NODE=worker-1 bro %INPUT
+# @TEST-EXEC: btest-bg-run worker-2  BROPATH=$BROPATH:.. CLUSTER_NODE=worker-2 bro %INPUT
+# @TEST-EXEC: btest-bg-wait 15
+
+# @TEST-EXEC: btest-diff manager-1/.stdout
+
+@TEST-START-FILE cluster-layout.bro
+redef Cluster::nodes = {
+	["manager-1"] = [$node_type=Cluster::MANAGER, $ip=127.0.0.1, $p=37757/tcp, $workers=set("worker-1", "worker-2")],
+	["worker-1"]  = [$node_type=Cluster::WORKER,  $ip=127.0.0.1, $p=37760/tcp, $manager="manager-1", $interface="eth0"],
+	["worker-2"]  = [$node_type=Cluster::WORKER,  $ip=127.0.0.1, $p=37761/tcp, $manager="manager-1", $interface="eth1"],
+};
+@TEST-END-FILE
+
+redef Log::default_rotation_interval = 0secs;
+
+global n = 0;
+
+event bro_init() &priority=5
+	{
+	local r1: Measurement::Reducer = [$stream="test.metric", $apply=set(Measurement::SUM, Measurement::MIN, Measurement::MAX, Measurement::AVERAGE, Measurement::STD_DEV, Measurement::VARIANCE, Measurement::UNIQUE)];
+	Measurement::create([$epoch=5secs,
+	                     $reducers=set(r1),
+	                     $epoch_finished(rt: Measurement::ResultTable) =
+	                     	{
+	                     	for ( key in rt )
+	                     		{
+	                     		local r = rt[key]["test.metric"];
+	                     		print fmt("Host: %s - num:%d - sum:%.1f - avg:%.1f - max:%.1f - min:%.1f - var:%.1f - std_dev:%.1f - unique:%d", key$host, r$num, r$sum, r$average, r$max, r$min, r$variance, r$std_dev, r$unique);
+	                     		}
+
+	                     	terminate();
+	                     	}
+	                     ]);
+	}
+
+event remote_connection_closed(p: event_peer)
+	{
+	terminate();
+	}
+
+global ready_for_data: event();
+redef Cluster::manager2worker_events += /^ready_for_data$/;
+
+event ready_for_data()
+	{
+	if ( Cluster::node == "worker-1" )
+		{
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=34]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=30]);
+		Measurement::add_data("test.metric", [$host=6.5.4.3], [$num=1]);
+		Measurement::add_data("test.metric", [$host=7.2.1.5], [$num=54]);
+		}
+	if ( Cluster::node == "worker-2" )
+		{
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=75]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=30]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=57]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=52]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=61]);
+		Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=95]);
+		Measurement::add_data("test.metric", [$host=6.5.4.3], [$num=5]);
+		Measurement::add_data("test.metric", [$host=7.2.1.5], [$num=91]);
+		Measurement::add_data("test.metric", [$host=10.10.10.10], [$num=5]);
+		}
+	}
+
+@if ( Cluster::local_node_type() == Cluster::MANAGER )
+
+global peer_count = 0;
+event remote_connection_handshake_done(p: event_peer) &priority=-5
+	{
+	++peer_count;
+	if ( peer_count == 2 )
+		event ready_for_data();
+	}
+
+@endif
diff --git a/testing/btest/scripts/base/frameworks/measurement/basic.bro b/testing/btest/scripts/base/frameworks/measurement/basic.bro
new file mode 100644
index 0000000000..e9dd21e0ef
--- /dev/null
+++ b/testing/btest/scripts/base/frameworks/measurement/basic.bro
@@ -0,0 +1,34 @@
+# @TEST-EXEC: bro %INPUT
+# @TEST-EXEC: btest-diff .stdout
+
+event bro_init() &priority=5
+	{
+	local r1: Measurement::Reducer = [$stream="test.metric", 
+	                                  $apply=set(Measurement::SUM, 
+	                                             Measurement::VARIANCE, 
+	                                             Measurement::AVERAGE, 
+	                                             Measurement::MAX, 
+	                                             Measurement::MIN, 
+	                                             Measurement::STD_DEV,
+	                                             Measurement::UNIQUE)];
+	Measurement::create([$epoch=3secs,
+	                     $reducers=set(r1),
+	                     $epoch_finished(data: Measurement::ResultTable) = 
+	                     	{
+	                     	for ( key in data )
+	                     		{
+	                     		local r = data[key]["test.metric"];
+	                     		print fmt("Host: %s - num:%d - sum:%.1f - var:%.1f - avg:%.1f - max:%.1f - min:%.1f - std_dev:%.1f - unique:%d", key$host, r$num, r$sum, r$variance, r$average, r$max, r$min, r$std_dev, r$unique);
+	                     		}
+	                     	}
+		 ]);
+
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=5]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=22]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=94]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=50]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=50]);
+
+	Measurement::add_data("test.metric", [$host=6.5.4.3], [$num=2]);
+	Measurement::add_data("test.metric", [$host=7.2.1.5], [$num=1]);
+	}
diff --git a/testing/btest/scripts/base/frameworks/metrics/cluster-intermediate-update.bro b/testing/btest/scripts/base/frameworks/measurement/cluster-intermediate-update.bro
similarity index 56%
rename from testing/btest/scripts/base/frameworks/metrics/cluster-intermediate-update.bro
rename to testing/btest/scripts/base/frameworks/measurement/cluster-intermediate-update.bro
index b16645dbe6..56f44db2eb 100644
--- a/testing/btest/scripts/base/frameworks/metrics/cluster-intermediate-update.bro
+++ b/testing/btest/scripts/base/frameworks/measurement/cluster-intermediate-update.bro
@@ -19,14 +19,20 @@ redef Log::default_rotation_interval = 0secs;
 
 event bro_init() &priority=5
 	{
-	Metrics::add_filter("test.metric",
-	                    [$every=1hr,
-	                     $measure=set(Metrics::SUM),
+	local r1: Measurement::Reducer = [$stream="test.metric", $apply=set(Measurement::SUM)];
+	Measurement::create([$epoch=1hr,
+	                     $reducers=set(r1),
+	                     $threshold_val(key: Measurement::Key, result: Measurement::Result) =
+	                     	{
+	                     	return double_to_count(result["test.metric"]$sum);
+	                     	},
 	                     $threshold=100,
-	                     $threshold_crossed(index: Metrics::Index, val: Metrics::ResultVal) = {
-	                     	print "A test metric threshold was crossed!";
+	                     $threshold_crossed(key: Measurement::Key, result: Measurement::Result) =
+	                     	{
+	                     	print fmt("A test metric threshold was crossed with a value of: %.1f", result["test.metric"]$sum);
 	                     	terminate();
-	                     }]);
+	                     	}
+	                    ]);
 	}
 
 event remote_connection_closed(p: event_peer)
@@ -39,13 +45,16 @@ event do_metrics(i: count)
 	# Worker-1 will trigger an intermediate update and then if everything
 	# works correctly, the data from worker-2 will hit the threshold and
 	# should trigger the notice.
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=i]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=i]);
 	}
 
-event bro_init()
+event remote_connection_handshake_done(p: event_peer)
 	{
-	if ( Cluster::node == "worker-1" )
-		schedule 2sec { do_metrics(99) };
-	if ( Cluster::node == "worker-2" )
-		event do_metrics(1);
+	if ( p$descr == "manager-1" )
+		{
+		if ( Cluster::node == "worker-1" )
+			schedule 0.1sec { do_metrics(1) };
+		if ( Cluster::node == "worker-2" )
+			schedule 0.5sec { do_metrics(99) };
+		}
 	}
diff --git a/testing/btest/scripts/base/frameworks/measurement/thresholding.bro b/testing/btest/scripts/base/frameworks/measurement/thresholding.bro
new file mode 100644
index 0000000000..d25350930e
--- /dev/null
+++ b/testing/btest/scripts/base/frameworks/measurement/thresholding.bro
@@ -0,0 +1,73 @@
+# @TEST-EXEC: bro %INPUT
+# @TEST-EXEC: btest-diff .stdout
+
+redef enum Notice::Type += {
+	Test_Notice,
+};
+
+event bro_init() &priority=5
+	{
+	local r1: Measurement::Reducer = [$stream="test.metric", $apply=set(Measurement::SUM)];
+	Measurement::create([$epoch=3secs,
+	                     $reducers=set(r1),
+	                     #$threshold_val = Measurement::sum_threshold("test.metric"),
+	                     $threshold_val(key: Measurement::Key, result: Measurement::Result) =
+	                     	{ 
+	                     	return double_to_count(result["test.metric"]$sum);
+	                     	},
+	                     $threshold=5,
+	                     $threshold_crossed(key: Measurement::Key, result: Measurement::Result) = 
+	                     	{
+	                     	local r = result["test.metric"];
+	                     	print fmt("THRESHOLD: hit a threshold value at %.0f for %s", r$sum, Measurement::key2str(key));
+	                     	}
+	                     ]);
+
+	local r2: Measurement::Reducer = [$stream="test.metric", $apply=set(Measurement::SUM)];
+	Measurement::create([$epoch=3secs,
+	                     $reducers=set(r2),
+	                     #$threshold_val = Measurement::sum_threshold("test.metric"),
+	                     $threshold_val(key: Measurement::Key, result: Measurement::Result) =
+	                     	{ 
+	                     	return double_to_count(result["test.metric"]$sum); 
+	                     	},
+	                     $threshold_series=vector(3,6,800),
+	                     $threshold_crossed(key: Measurement::Key, result: Measurement::Result) = 
+	                     	{
+	                     	local r = result["test.metric"];
+	                     	print fmt("THRESHOLD_SERIES: hit a threshold series value at %.0f for %s", r$sum, Measurement::key2str(key));
+	                     	}
+	                     ]);
+
+	local r3: Measurement::Reducer = [$stream="test.metric", $apply=set(Measurement::SUM)];
+	local r4: Measurement::Reducer = [$stream="test.metric2", $apply=set(Measurement::SUM)];
+	Measurement::create([$epoch=3secs,
+	                     $reducers=set(r3, r4),
+	                     $threshold_val(key: Measurement::Key, result: Measurement::Result) =
+	                     	{ 
+	                     	# Calculate a ratio between sums of two reducers.
+	                     	if ( "test.metric2" in result && "test.metric" in result &&
+	                     	     result["test.metric"]$sum > 0 )
+	                     		return double_to_count(result["test.metric2"]$sum / result["test.metric"]$sum);
+	                     	else
+	                     		return 0;
+	                     	},
+	                     # Looking for metric2 sum to be 5 times the sum of metric
+	                     $threshold=5, 
+	                     $threshold_crossed(key: Measurement::Key, result: Measurement::Result) =
+	                     	{
+	                     	local thold = result["test.metric2"]$sum / result["test.metric"]$sum;
+	                     	print fmt("THRESHOLD WITH RATIO BETWEEN REDUCERS: hit a threshold value at %.0fx for %s", thold, Measurement::key2str(key));
+	                     	}
+	                     ]);
+
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
+	Measurement::add_data("test.metric", [$host=6.5.4.3], [$num=2]);
+	Measurement::add_data("test.metric", [$host=7.2.1.5], [$num=1]);
+	Measurement::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
+	Measurement::add_data("test.metric", [$host=7.2.1.5], [$num=1000]);
+	Measurement::add_data("test.metric2", [$host=7.2.1.5], [$num=10]);
+	Measurement::add_data("test.metric2", [$host=7.2.1.5], [$num=1000]);
+	Measurement::add_data("test.metric2", [$host=7.2.1.5], [$num=54321]);
+
+	}
diff --git a/testing/btest/scripts/base/frameworks/metrics/basic-cluster.bro b/testing/btest/scripts/base/frameworks/metrics/basic-cluster.bro
deleted file mode 100644
index c68a4f7beb..0000000000
--- a/testing/btest/scripts/base/frameworks/metrics/basic-cluster.bro
+++ /dev/null
@@ -1,88 +0,0 @@
-# @TEST-SERIALIZE: comm
-#
-# @TEST-EXEC: btest-bg-run manager-1 BROPATH=$BROPATH:.. CLUSTER_NODE=manager-1 bro %INPUT
-# @TEST-EXEC: btest-bg-run proxy-1   BROPATH=$BROPATH:.. CLUSTER_NODE=proxy-1 bro %INPUT
-# @TEST-EXEC: sleep 1
-# @TEST-EXEC: btest-bg-run worker-1  BROPATH=$BROPATH:.. CLUSTER_NODE=worker-1 bro %INPUT
-# @TEST-EXEC: btest-bg-run worker-2  BROPATH=$BROPATH:.. CLUSTER_NODE=worker-2 bro %INPUT
-# @TEST-EXEC: btest-bg-wait 15
-# @TEST-EXEC: btest-diff manager-1/metrics.log
-
-@TEST-START-FILE cluster-layout.bro
-redef Cluster::nodes = {
-	["manager-1"] = [$node_type=Cluster::MANAGER, $ip=127.0.0.1, $p=37757/tcp, $workers=set("worker-1", "worker-2")],
-	["proxy-1"]   = [$node_type=Cluster::PROXY,   $ip=127.0.0.1, $p=37758/tcp, $manager="manager-1", $workers=set("worker-1", "worker-2")],
-	["worker-1"]  = [$node_type=Cluster::WORKER,  $ip=127.0.0.1, $p=37760/tcp, $manager="manager-1", $proxy="proxy-1", $interface="eth0"],
-	["worker-2"]  = [$node_type=Cluster::WORKER,  $ip=127.0.0.1, $p=37761/tcp, $manager="manager-1", $proxy="proxy-1", $interface="eth1"],
-};
-@TEST-END-FILE
-
-redef Log::default_rotation_interval = 0secs;
-
-global n = 0;
-
-event bro_init() &priority=5
-	{
-	Metrics::add_filter("test.metric", 
-	                    [$every=3secs,
-	                     $measure=set(Metrics::SUM, Metrics::MIN, Metrics::MAX, Metrics::AVG, Metrics::STD_DEV, Metrics::VARIANCE, Metrics::UNIQUE),
-	                     $period_finished(ts: time, metric_name: string, filter_name: string, data: Metrics::MetricTable) =
-	                     	{
-	                     	Metrics::write_log(ts, metric_name, filter_name, data);
-	                     	if ( ++n == 3 )
-	                     		{
-	                     		terminate_communication();
-	                     		terminate();
-	                     		}
-	                     	}
-	                     	]);
-	}
-
-event remote_connection_closed(p: event_peer)
-	{
-	terminate();
-	}
-
-global ready_for_data: event();
-
-redef Cluster::manager2worker_events += /ready_for_data/;
-
-@if ( Cluster::local_node_type() == Cluster::WORKER )
-
-event ready_for_data()
-	{
-	if ( Cluster::node == "worker-1" )
-		{
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=34]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=30]);
-		Metrics::add_data("test.metric", [$host=6.5.4.3], [$num=1]);
-		Metrics::add_data("test.metric", [$host=7.2.1.5], [$num=54]);
-		}
-	if ( Cluster::node == "worker-2" )
-		{
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=75]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=30]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=57]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=52]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=61]);
-		Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=95]);
-		Metrics::add_data("test.metric", [$host=6.5.4.3], [$num=5]);
-		Metrics::add_data("test.metric", [$host=7.2.1.5], [$num=91]);
-		}
-	}
-
-@endif
-
-@if ( Cluster::local_node_type() == Cluster::MANAGER )
-
-global peer_count = 0;
-
-event remote_connection_handshake_done(p: event_peer)
-	{
-	++peer_count;
-	if ( peer_count == 3 )
-		event ready_for_data();
-	}
-
-@endif
diff --git a/testing/btest/scripts/base/frameworks/metrics/basic.bro b/testing/btest/scripts/base/frameworks/metrics/basic.bro
deleted file mode 100644
index e665f2ea5c..0000000000
--- a/testing/btest/scripts/base/frameworks/metrics/basic.bro
+++ /dev/null
@@ -1,20 +0,0 @@
-# @TEST-EXEC: bro %INPUT
-# @TEST-EXEC: btest-diff metrics.log
-
-event bro_init() &priority=5
-	{
-	Metrics::add_filter("test.metric", 
-		[$name="foo-bar",
-		 $every=3secs,
-		 $measure=set(Metrics::SUM, Metrics::VARIANCE, Metrics::AVG, Metrics::MAX, Metrics::MIN, Metrics::STD_DEV),
-		 $period_finished=Metrics::write_log]);
-
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=5]);
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=22]);
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=94]);
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=50]);
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=50]);
-
-	Metrics::add_data("test.metric", [$host=6.5.4.3], [$num=2]);
-	Metrics::add_data("test.metric", [$host=7.2.1.5], [$num=1]);
-	}
diff --git a/testing/btest/scripts/base/frameworks/metrics/thresholding.bro b/testing/btest/scripts/base/frameworks/metrics/thresholding.bro
deleted file mode 100644
index f39443fc2a..0000000000
--- a/testing/btest/scripts/base/frameworks/metrics/thresholding.bro
+++ /dev/null
@@ -1,44 +0,0 @@
-# @TEST-EXEC: bro %INPUT
-# @TEST-EXEC: btest-diff .stdout
-
-
-redef enum Notice::Type += {
-	Test_Notice,
-};
-
-event bro_init() &priority=5
-	{
-	Metrics::add_filter("test.metric", 
-	                    [$name="foobar",
-	                     $every=3secs,
-	                     $measure=set(Metrics::SUM),
-	                     $threshold=5,
-	                     $threshold_crossed(index: Metrics::Index, val: Metrics::ResultVal) = {
-	                     	print fmt("THRESHOLD: hit a threshold value at %.0f for %s", val$sum, Metrics::index2str(index));
-	                     }]);
-
-	Metrics::add_filter("test.metric", 
-	                    [$name="foobar2",
-	                     $every=3secs,
-	                     $measure=set(Metrics::SUM),
-	                     $threshold_series=vector(3,6,800),
-	                     $threshold_crossed(index: Metrics::Index, val: Metrics::ResultVal) = {
-	                     	print fmt("THRESHOLD_SERIES: hit a threshold series value at %.0f for %s", val$sum, Metrics::index2str(index));
-		                 }]);
-	Metrics::add_filter("test.metric", 
-	                    [$every=3secs,
-	                     $measure=set(Metrics::SUM),
-	                     $threshold_func(index: Metrics::Index, val: Metrics::ResultVal) = {
-	                     	# This causes any data added to be cross the threshold.
-	                     	return T;
-	                     },
-	                     $threshold_crossed(index: Metrics::Index, val: Metrics::ResultVal) = {
-	                     	print fmt("THRESHOLD_FUNC: hit a threshold function value at %.0f for %s", val$sum, Metrics::index2str(index));
-	                     }]);
-
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
-	Metrics::add_data("test.metric", [$host=6.5.4.3], [$num=2]);
-	Metrics::add_data("test.metric", [$host=7.2.1.5], [$num=1]);
-	Metrics::add_data("test.metric", [$host=1.2.3.4], [$num=3]);
-	Metrics::add_data("test.metric", [$host=7.2.1.5], [$num=1000]);
-	}