raghavyadav01 commented on code in PR #15266:
URL: https://github.com/apache/pinot/pull/15266#discussion_r2023466733
##########
pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java:
##########
@@ -1264,116 +1264,95 @@ public void testIsExternalViewConverged() {
boolean[] falseAndTrue = new boolean[]{false, true};
// Empty segment states should match
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Do not check segment that does not exist in IdealState
Map<String, String> instanceStateMap = new TreeMap<>();
instanceStateMap.put("instance1", ONLINE);
externalViewSegmentStates.put("segment1", instanceStateMap);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Do not check segment that is OFFLINE in IdealState
instanceStateMap = new TreeMap<>();
instanceStateMap.put("instance1", OFFLINE);
idealStateSegmentStates.put("segment2", instanceStateMap);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Should fail when a segment has CONSUMING instance in IdealState but
does not exist in ExternalView
instanceStateMap.put("instance2", CONSUMING);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Should fail when instance state does not exist
instanceStateMap = new TreeMap<>();
externalViewSegmentStates.put("segment2", instanceStateMap);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Should fail when instance state does not match
instanceStateMap.put("instance2", OFFLINE);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertFalse(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
// Should pass when instance state matches
instanceStateMap.put("instance2", CONSUMING);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
- }
+ for (boolean bestEfforts : falseAndTrue) {
+ assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, bestEfforts, null));
}
- // When there are extra instances in ExternalView, should pass in regular
mode but fail in low disk mode
+ // When there are extra instances in ExternalView, should fail (always
wait for extra instances to be removed)
instanceStateMap.put("instance3", CONSUMING);
for (boolean bestEfforts : falseAndTrue) {
- assertTrue(
- TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
- false, bestEfforts, null));
assertFalse(
TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
- true, bestEfforts, null));
+ bestEfforts, null));
}
// When instance state is ERROR in ExternalView, should fail in regular
mode but pass in best-efforts mode
instanceStateMap.put("instance2", ERROR);
instanceStateMap.remove("instance3");
- for (boolean lowDiskMode : falseAndTrue) {
- try {
- TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
- lowDiskMode, false, null);
- fail();
- } catch (Exception e) {
- // Expected
- }
- assertTrue(
- TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
- lowDiskMode, true, null));
+ try {
+ TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
+ false, null);
+ fail();
+ } catch (Exception e) {
+ // Expected
}
+ assertTrue(
+ TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates, idealStateSegmentStates,
+ true, null));
- // When the extra instance is in ERROR state, should throw exception in
low disk mode when best-efforts is disabled
+ // When the extra instance is in ERROR state, should throw exception when
best-efforts is disabled
instanceStateMap.put("instance2", CONSUMING);
instanceStateMap.put("instance3", ERROR);
- for (boolean lowDiskMode : falseAndTrue) {
- for (boolean bestEfforts : falseAndTrue) {
- if (lowDiskMode && !bestEfforts) {
- try {
- TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, true, false, null);
- fail();
- } catch (Exception e) {
- // Expected
- }
- } else {
- assertTrue(TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
- idealStateSegmentStates, lowDiskMode, bestEfforts, null));
+ for (boolean bestEfforts : falseAndTrue) {
+ if (!bestEfforts) {
+ try {
+ TableRebalancer.isExternalViewConverged(offlineTableName,
externalViewSegmentStates,
+ idealStateSegmentStates, false, null);
+ fail();
+ } catch (Exception e) {
+ // Expected
Review Comment:
Will there be a value adding log here? It might flood if it is too
aggressive.
##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java:
##########
@@ -68,31 +70,67 @@ public ZkBasedTableRebalanceObserver(String
tableNameWithType, String rebalanceJ
@Override
public void onTrigger(Trigger trigger, Map<String, Map<String, String>>
currentState,
- Map<String, Map<String, String>> targetState) {
+ Map<String, Map<String, String>> targetState, RebalanceContext
rebalanceContext) {
boolean updatedStatsInZk = false;
_controllerMetrics.setValueOfTableGauge(_tableNameWithType,
ControllerGauge.TABLE_REBALANCE_IN_PROGRESS, 1);
+ TableRebalanceProgressStats.RebalanceStateStats latest;
+ TableRebalanceProgressStats.RebalanceProgressStats latestProgress;
switch (trigger) {
case START_TRIGGER:
- updateOnStart(currentState, targetState);
+ updateOnStart(currentState, targetState, rebalanceContext);
trackStatsInZk();
updatedStatsInZk = true;
break;
// Write to Zk if there's change since previous stats computation
case IDEAL_STATE_CHANGE_TRIGGER:
- TableRebalanceProgressStats.RebalanceStateStats latest =
- getDifferenceBetweenTableRebalanceStates(targetState,
currentState);
+ latest = getDifferenceBetweenTableRebalanceStates(targetState,
currentState);
+ latestProgress = calculateOverallProgressStats(targetState,
+ currentState, rebalanceContext,
Trigger.IDEAL_STATE_CHANGE_TRIGGER, _tableRebalanceProgressStats);
if
(TableRebalanceProgressStats.statsDiffer(_tableRebalanceProgressStats.getCurrentToTargetConvergence(),
- latest)) {
- _tableRebalanceProgressStats.setCurrentToTargetConvergence(latest);
+ latest) || TableRebalanceProgressStats.progressStatsDiffer(
+ _tableRebalanceProgressStats.getRebalanceProgressStatsOverall(),
latestProgress)) {
+ if (TableRebalanceProgressStats.statsDiffer(
+
_tableRebalanceProgressStats.getExternalViewToIdealStateConvergence(), latest))
{
+ _tableRebalanceProgressStats.setCurrentToTargetConvergence(latest);
Review Comment:
By regressed I mean can the stats go back or become negative.
##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/rebalance/ZkBasedTableRebalanceObserver.java:
##########
@@ -271,17 +315,279 @@ public static
TableRebalanceProgressStats.RebalanceStateStats getDifferenceBetwe
String instanceName = instanceStateEntry.getKey();
String sourceInstanceState = sourceInstanceStateMap.get(instanceName);
if (!targetStateInstanceState.equals(sourceInstanceState)) {
- rebalanceStats._replicasToRebalance++;
+ rebalanceStats._totalSegmentsToRebalance++;
hasSegmentConverged = false;
}
}
if (!hasSegmentConverged) {
- rebalanceStats._segmentsToRebalance++;
+ rebalanceStats._uniqueSegmentsToRebalance++;
}
}
int totalSegments = targetState.size();
- rebalanceStats._percentSegmentsToRebalance =
- (totalSegments == 0) ? 0 : ((double)
rebalanceStats._segmentsToRebalance / totalSegments) * 100.0;
+ rebalanceStats._percentRemainingSegmentsToRebalance =
+ (totalSegments == 0) ? 0 : ((double)
rebalanceStats._uniqueSegmentsToRebalance / totalSegments) * 100.0;
return rebalanceStats;
}
+
+ /**
+ * Updates the overall progress stats based on the current step's progress
stats. This should be called
+ * during the EV-IS convergence trigger to ensure the overall stats reflect
the changes as they are made.
+ * @param rebalanceProgressStats the rebalance stats
+ * @param lastStepStats step level stats from the last iteration
+ * @param latestStepStats latest step level stats calculated in this
iteration
+ * @return the newly calculated overall progress stats
+ */
+ @VisibleForTesting
+ static TableRebalanceProgressStats.RebalanceProgressStats
updateOverallProgressStatsFromStep(
+ TableRebalanceProgressStats rebalanceProgressStats,
+ TableRebalanceProgressStats.RebalanceProgressStats lastStepStats,
+ TableRebalanceProgressStats.RebalanceProgressStats latestStepStats) {
+ int numAdditionalSegmentsAdded =
+ latestStepStats._totalSegmentsToBeAdded -
lastStepStats._totalSegmentsToBeAdded;
+ int numAdditionalSegmentsDeleted =
+ latestStepStats._totalSegmentsToBeDeleted -
lastStepStats._totalSegmentsToBeDeleted;
+ int numSegmentAddsProcessedInLastStep =
Math.abs(lastStepStats._totalRemainingSegmentsToBeAdded
+ - latestStepStats._totalRemainingSegmentsToBeAdded);
+ int numSegmentDeletesProcessedInLastStep =
Math.abs(lastStepStats._totalRemainingSegmentsToBeDeleted
+ - latestStepStats._totalRemainingSegmentsToBeDeleted);
+ int numberNewUntrackedSegmentsAdded =
latestStepStats._totalUniqueNewUntrackedSegmentsDuringRebalance
+ - lastStepStats._totalUniqueNewUntrackedSegmentsDuringRebalance;
+
+ TableRebalanceProgressStats.RebalanceProgressStats overallProgressStats =
+ rebalanceProgressStats.getRebalanceProgressStatsOverall();
+
+ TableRebalanceProgressStats.RebalanceProgressStats newOverallProgressStats
=
+ new TableRebalanceProgressStats.RebalanceProgressStats();
+
+ newOverallProgressStats._totalSegmentsToBeAdded =
overallProgressStats._totalSegmentsToBeAdded
+ + numAdditionalSegmentsAdded;
+ newOverallProgressStats._totalSegmentsToBeDeleted =
overallProgressStats._totalSegmentsToBeDeleted
+ + numAdditionalSegmentsDeleted;
+ newOverallProgressStats._totalRemainingSegmentsToBeAdded =
numAdditionalSegmentsAdded == 0
+ ? overallProgressStats._totalRemainingSegmentsToBeAdded -
numSegmentAddsProcessedInLastStep
+ : overallProgressStats._totalRemainingSegmentsToBeAdded +
numSegmentAddsProcessedInLastStep;
+ newOverallProgressStats._totalRemainingSegmentsToBeDeleted =
numAdditionalSegmentsDeleted == 0
+ ? overallProgressStats._totalRemainingSegmentsToBeDeleted -
numSegmentDeletesProcessedInLastStep
+ : overallProgressStats._totalRemainingSegmentsToBeAdded +
numSegmentDeletesProcessedInLastStep;
+ newOverallProgressStats._totalRemainingSegmentsToConverge =
latestStepStats._totalRemainingSegmentsToConverge;
+ newOverallProgressStats._totalUniqueNewUntrackedSegmentsDuringRebalance =
+ overallProgressStats._totalUniqueNewUntrackedSegmentsDuringRebalance +
numberNewUntrackedSegmentsAdded;
+ newOverallProgressStats._percentageTotalSegmentsAddsRemaining =
+
calculatePercentageChange(newOverallProgressStats._totalSegmentsToBeAdded,
Review Comment:
Thanks. Looks good.
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