xinyuiscool commented on code in PR #26437:
URL: https://github.com/apache/beam/pull/26437#discussion_r1184102173
##########
runners/samza/src/main/java/org/apache/beam/runners/samza/SamzaPipelineOptions.java:
##########
@@ -111,6 +111,12 @@ public interface SamzaPipelineOptions extends
PipelineOptions {
void setEnableMetrics(Boolean enableMetrics);
+ @Description("Enable/disable Beam Transform throughput, latency metrics in
Samza Runner")
+ @Default.Boolean(true)
Review Comment:
Let's keep default to be false so we can enable it only for jobs need this.
##########
runners/samza/src/main/java/org/apache/beam/runners/samza/translation/TranslationContext.java:
##########
@@ -145,9 +150,30 @@ protected <KeyT, OutT> void registerInputMessageStreams(
}
public <OutT> void registerMessageStream(PValue pvalue,
MessageStream<OpMessage<OutT>> stream) {
+ registerMessageStream(pvalue, stream, true);
+ }
+
+ public <OutT> void registerMessageStreamWithoutMetricOp(
+ PValue pvalue, MessageStream<OpMessage<OutT>> stream) {
+ registerMessageStream(pvalue, stream, false);
Review Comment:
Please remove this boolean flag. We should attach the MetricOp if the
TransformMetric is enabled. But inside the op, we can decide what to do with it.
##########
runners/samza/src/main/java/org/apache/beam/runners/samza/runtime/SamzaInputMetricOp.java:
##########
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.beam.runners.samza.runtime;
+
+import java.math.BigInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.atomic.AtomicReference;
+import org.apache.beam.runners.samza.metrics.BeamTransformMetricRegistry;
+import org.apache.beam.sdk.util.WindowedValue;
+import org.joda.time.Instant;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * SamzaInputMetricOp is a {@link SamzaMetricOp} that emits & maintains
default transform metrics
+ * for input PCollection to the transform. It emits the input throughput and
maintains avg arrival
+ * time for input PCollection per watermark.
+ *
+ * <p>Assumes that {@code SamzaInputMetricOp#processWatermark(Instant,
OpEmitter)} is exclusive of
+ * {@code SamzaInputMetricOp#processElement(Instant, OpEmitter)}.
Specifically, the processWatermark
+ * method assumes that no calls to processElement will be made during its
execution, and vice versa.
+ *
+ * @param <T> The type of the elements in the input PCollection.
+ */
+public class SamzaInputMetricOp<T> extends SamzaMetricOp<T> {
Review Comment:
Can we consolidate them in one Op and do the computation based on the inputs
and outputs present?
##########
runners/samza/src/main/java/org/apache/beam/runners/samza/translation/TranslationContext.java:
##########
@@ -145,9 +150,30 @@ protected <KeyT, OutT> void registerInputMessageStreams(
}
public <OutT> void registerMessageStream(PValue pvalue,
MessageStream<OpMessage<OutT>> stream) {
+ registerMessageStream(pvalue, stream, true);
+ }
+
+ public <OutT> void registerMessageStreamWithoutMetricOp(
+ PValue pvalue, MessageStream<OpMessage<OutT>> stream) {
+ registerMessageStream(pvalue, stream, false);
+ }
+
+ private <OutT> void registerMessageStream(
+ PValue pvalue, MessageStream<OpMessage<OutT>> stream, boolean
attachTransformMetricOp) {
if (messsageStreams.containsKey(pvalue)) {
throw new IllegalArgumentException("Stream already registered for
pvalue: " + pvalue);
}
+ // add a step to attach OutputMetricOp if registered for Op Stream
+ final Boolean userOverride =
getPipelineOptions().getEnableTransformMetrics();
Review Comment:
Update the var name.
##########
runners/samza/src/main/java/org/apache/beam/runners/samza/metrics/BeamTransformMetricRegistry.java:
##########
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.beam.runners.samza.metrics;
+
+import java.io.Serializable;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.stream.Collectors;
+import org.apache.samza.context.Context;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * BeamTransformMetricRegistry is a registry that maintains the metrics for
each transform. It
+ * maintains the average arrival time for each PCollection for a primitive
transform.
+ *
+ * <p>For a non-data shuffling primitive transform, the average arrival time
is calculated per
+ * watermark, per PCollection {@link org.apache.beam.sdk.values.PValue} and
updated in
+ * avgArrivalTimeMap
+ */
+public class BeamTransformMetricRegistry implements Serializable {
+ private static final Logger LOG =
LoggerFactory.getLogger(BeamTransformMetricRegistry.class);
+
+ // TransformName -> PValue for pCollection -> Map<WatermarkId,
AvgArrivalTime>
+ private ConcurrentHashMap<String, ConcurrentHashMap<String,
ConcurrentHashMap<Long, Long>>>
Review Comment:
In essense, we are keeping track of each PCollection's timestamp, regardless
of using per transform or not. In the above graph, we should use the latency
due to traversing 4 first. Otherwise we are not reporting correctly the
latency. In another world we might do some optimization to execute 4 and 5 in
parallel, then we won't be able see the latency improvement. I think this
should be a simple equation, basically `timestamp(input PC) - timestamp(output
PC)` for each PTransform.
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