himanshug commented on a change in pull request #9350: Overlord to support
autoscalers per indexer/middlemanager category
URL: https://github.com/apache/druid/pull/9350#discussion_r395934763
##########
File path:
indexing-service/src/main/java/org/apache/druid/indexing/overlord/autoscaling/SimpleWorkerProvisioningStrategy.java
##########
@@ -102,69 +102,170 @@ public Provisioner makeProvisioner(WorkerTaskRunner
runner)
private final WorkerTaskRunner runner;
private final ScalingStats scalingStats = new
ScalingStats(config.getNumEventsToTrack());
- private final Set<String> currentlyProvisioning = new HashSet<>();
- private final Set<String> currentlyTerminating = new HashSet<>();
+ private final Map<String, Set<String>> currentlyProvisioningMap = new
HashMap<>();
+ private final Map<String, Set<String>> currentlyTerminatingMap = new
HashMap<>();
- private int targetWorkerCount = -1;
- private DateTime lastProvisionTime = DateTimes.nowUtc();
- private DateTime lastTerminateTime = lastProvisionTime;
+ private final Map<String, Integer> targetWorkerCountMap = new HashMap<>();
+ private final Map<String, DateTime> lastProvisionTimeMap = new HashMap<>();
+ private final Map<String, DateTime> lastTerminateTimeMap = new HashMap<>();
SimpleProvisioner(WorkerTaskRunner runner)
{
this.runner = runner;
}
+ private Map<String, List<TaskRunnerWorkItem>> groupTasksByCategories(
+ Collection<? extends TaskRunnerWorkItem> pendingTasks,
+ WorkerTaskRunner runner,
+ WorkerCategorySpec workerCategorySpec
+ )
+ {
+ Collection<Task> pendingTasksPayload = runner.getPendingTaskPayloads();
+ Map<String, List<Task>> taskPayloadsById = pendingTasksPayload.stream()
+
.collect(Collectors.groupingBy(Task::getId));
+
+ return pendingTasks.stream().collect(Collectors.groupingBy(task -> {
+ List<Task> taskPayloads = taskPayloadsById.get(task.getTaskId());
+ if (taskPayloads == null || taskPayloads.isEmpty()) {
+ return DefaultWorkerBehaviorConfig.DEFAULT_AUTOSCALER_CATEGORY;
+ }
+ return WorkerSelectUtils.getTaskCategory(
+ taskPayloads.get(0),
+ workerCategorySpec,
+ DefaultWorkerBehaviorConfig.DEFAULT_AUTOSCALER_CATEGORY
+ );
+ }));
+ }
+
@Override
public synchronized boolean doProvision()
{
Collection<? extends TaskRunnerWorkItem> pendingTasks =
runner.getPendingTasks();
+ log.debug("Pending tasks: %d %s", pendingTasks.size(), pendingTasks);
Collection<ImmutableWorkerInfo> workers = runner.getWorkers();
+ log.debug("Workers: %d %s", workers.size(), workers);
boolean didProvision = false;
- final DefaultWorkerBehaviorConfig workerConfig =
-
PendingTaskBasedWorkerProvisioningStrategy.getDefaultWorkerBehaviorConfig(workerConfigRef,
"provision", log);
+ final DefaultWorkerBehaviorConfig workerConfig =
ProvisioningUtil.getDefaultWorkerBehaviorConfig(
+ workerConfigRef,
+ "provision"
+ );
if (workerConfig == null) {
+ log.info("No worker config found. Skip provisioning.");
return false;
}
+ WorkerCategorySpec workerCategorySpec =
ProvisioningUtil.getWorkerCategorySpec(workerConfig);
+
+ // Group tasks by categories
+ Map<String, List<TaskRunnerWorkItem>> tasksByCategories =
groupTasksByCategories(
+ pendingTasks,
+ runner,
+ workerCategorySpec
+ );
+
+ Map<String, List<ImmutableWorkerInfo>> workersByCategories =
ProvisioningUtil.getWorkersByCategories(workers);
+
+ // Merge categories of tasks and workers
+ Set<String> allCategories = new HashSet<>(tasksByCategories.keySet());
+ allCategories.addAll(workersByCategories.keySet());
+
+ log.debug(
+ "Pending Tasks of %d categories (%s), Workers of %d categories (%s).
%d common categories: %s",
+ tasksByCategories.size(),
+ tasksByCategories.keySet(),
+ workersByCategories.size(),
+ workersByCategories.keySet(),
+ allCategories.size(),
+ allCategories
+ );
+
+ if (allCategories.isEmpty()) {
+ // Likely empty categories means initialization.
+ // Just try to spinup required amount of workers of each non empty
autoscalers
+ return initAutoscalers(workerConfig);
+ }
+
+ Map<String, AutoScaler> autoscalersByCategory =
ProvisioningUtil.mapAutoscalerByCategory(workerConfig.getAutoScalers());
+
+ for (String category : allCategories) {
+ List<? extends TaskRunnerWorkItem> categoryTasks =
tasksByCategories.getOrDefault(
+ category,
+ Collections.emptyList()
+ );
+ AutoScaler categoryAutoscaler =
ProvisioningUtil.getAutoscalerByCategory(category, autoscalersByCategory);
+
+ if (categoryAutoscaler == null) {
+ log.error("No autoScaler available, cannot execute doProvision for
workers of category %s", category);
+ continue;
+ }
+ // Correct category name by selected autoscaler
+ category = ProvisioningUtil.getAutoscalerCategory(categoryAutoscaler);
+
+ List<ImmutableWorkerInfo> categoryWorkers =
workersByCategories.getOrDefault(category, Collections.emptyList());
+ currentlyProvisioningMap.putIfAbsent(category, new HashSet<>());
+ Set<String> currentlyProvisioning =
this.currentlyProvisioningMap.get(category);
+ currentlyTerminatingMap.putIfAbsent(category, new HashSet<>());
+ Set<String> currentlyTerminating =
this.currentlyTerminatingMap.get(category);
+
+ didProvision = doProvision(
Review comment:
thanks for checking, I haven't looked that refactoring in details but I
believe you.
for the antlr error to go away, do "mvn clean install -DskipTests" in `core`
module whenever you switch branches.
> I am supposed to mark a conversation as resolved if I believe to have
addressed a review comment or whether it is rather meant to be the reviewer's
privilege to do that.
it is a new feature in github and I don't think there is any formal
agreement in Druid community over this. But, I would say, PR author should
feel free to mark the conversation resolved when they think that they addressed
it. If Reviewer doesn't agree then they can mark it "unresolved" and
conversation can be further resumed.
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