Detect subNode phase updates to reduce evaluation frequency of ArrayN…

…ode (#4535) * detecting subNode or task phase updates to increment TaskPhaseVersion on ArrayNode state Signed-off-by: Daniel Rammer <daniel@union.ai> * not writting empty file on no inputs Signed-off-by: Daniel Rammer <daniel@union.ai> --------- Signed-off-by: Daniel Rammer <daniel@union.ai>
flyteorg · Dec 8, 2023 · b50ba87 · b50ba87
1 parent f440278
commit b50ba87
Show file tree

Hide file tree

Showing 3 changed files with 16 additions and 9 deletions.
diff --git a/flytepropeller/pkg/controller/nodes/array/handler.go b/flytepropeller/pkg/controller/nodes/array/handler.go
@@ -169,7 +169,7 @@ func (a *arrayNodeHandler) Handle(ctx context.Context, nCtx interfaces.NodeExecu
 	arrayNodeState := nCtx.NodeStateReader().GetArrayNodeState()
 	currentArrayNodePhase := arrayNodeState.Phase
 
-	taskPhaseVersion := arrayNodeState.TaskPhaseVersion
+	incrementTaskPhaseVersion := false
 	eventRecorder := newArrayEventRecorder(nCtx.EventsRecorder())
 
 	switch currentArrayNodePhase {
@@ -246,6 +246,7 @@ func (a *arrayNodeHandler) Handle(ctx context.Context, nCtx interfaces.NodeExecu
 		messageCollector := errorcollector.NewErrorMessageCollector()
 		for i, nodePhaseUint64 := range arrayNodeState.SubNodePhases.GetItems() {
 			nodePhase := v1alpha1.NodePhase(nodePhaseUint64)
+			taskPhase := int(arrayNodeState.SubNodeTaskPhases.GetItem(i))
 
 			// do not process nodes in terminal state
 			if isTerminalNodePhase(nodePhase) {
@@ -283,6 +284,11 @@ func (a *arrayNodeHandler) Handle(ctx context.Context, nCtx interfaces.NodeExecu
 			}
 			arrayNodeState.SubNodeRetryAttempts.SetItem(i, uint64(subNodeStatus.GetAttempts()))
 			arrayNodeState.SubNodeSystemFailures.SetItem(i, uint64(subNodeStatus.GetSystemFailures()))
+
+			// increment task phase version if subNode phase or task phase changed
+			if subNodeStatus.GetPhase() != nodePhase || subNodeStatus.GetTaskNodeStatus().GetPhase() != taskPhase {
+				incrementTaskPhaseVersion = true
+			}
 		}
 
 		// process phases of subNodes to determine overall `ArrayNode` phase
@@ -429,17 +435,15 @@ func (a *arrayNodeHandler) Handle(ctx context.Context, nCtx interfaces.NodeExecu
 			taskPhase = idlcore.TaskExecution_FAILED
 		}
 
-		// need to increment taskPhaseVersion if arrayNodeState.Phase does not change, otherwise
-		// reset to 0. by incrementing this always we report an event and ensure processing
-		// every time the ArrayNode is evaluated. if this overhead becomes too large, we will need
-		// to revisit and only increment when any subNode state changes.
+		// if the ArrayNode phase has changed we need to reset the taskPhaseVersion to 0, otherwise
+		// increment it if we detect any changes in subNode state.
 		if currentArrayNodePhase != arrayNodeState.Phase {
 			arrayNodeState.TaskPhaseVersion = 0
-		} else {
-			arrayNodeState.TaskPhaseVersion = taskPhaseVersion + 1
+		} else if incrementTaskPhaseVersion {
+			arrayNodeState.TaskPhaseVersion = arrayNodeState.TaskPhaseVersion + 1
 		}
 
-		if err := eventRecorder.finalize(ctx, nCtx, taskPhase, taskPhaseVersion, a.eventConfig); err != nil {
+		if err := eventRecorder.finalize(ctx, nCtx, taskPhase, arrayNodeState.TaskPhaseVersion, a.eventConfig); err != nil {
 			logger.Errorf(ctx, "ArrayNode event recording failed: [%s]", err.Error())
 			return handler.UnknownTransition, err
 		}

diff --git a/flytepropeller/pkg/controller/nodes/executor.go b/flytepropeller/pkg/controller/nodes/executor.go
@@ -753,7 +753,7 @@ func (c *nodeExecutor) preExecute(ctx context.Context, dag executors.DAGStructur
 				return handler.PhaseInfoFailure(core.ExecutionError_SYSTEM, "BindingResolutionFailure", err.Error(), nil), nil
 			}
 
-			if nodeInputs != nil {
+			if nodeInputs != nil && len(nodeInputs.Literals) > 0 {
 				inputsFile := v1alpha1.GetInputsFile(dataDir)
 				if err := c.store.WriteProtobuf(ctx, inputsFile, storage.Options{}, nodeInputs); err != nil {
 					c.metrics.InputsWriteFailure.Inc(ctx)

diff --git a/flytestdlib/storage/cached_rawstore.go b/flytestdlib/storage/cached_rawstore.go
@@ -35,6 +35,9 @@ type cachedRawStore struct {
 
 // Head gets metadata about the reference. This should generally be a lightweight operation.
 func (s *cachedRawStore) Head(ctx context.Context, reference DataReference) (Metadata, error) {
+	ctx, span := otelutils.NewSpan(ctx, otelutils.BlobstoreClientTracer, "flytestdlib.storage.cachedRawStore/Head")
+	defer span.End()
+
 	key := []byte(reference)
 	if oRaw, err := s.cache.Get(key); err == nil {
 		s.metrics.CacheHit.Inc()