somandal commented on code in PR #15110:
URL: https://github.com/apache/pinot/pull/15110#discussion_r1972438842
##########
pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerClusterStatelessTest.java:
##########
@@ -886,6 +886,226 @@ public void testRebalanceWithTiersAndInstanceAssignments()
_helixResourceManager.deleteOfflineTable(TIERED_TABLE_NAME);
}
+ @Test
+ public void testRebalanceWithMinimizeDataMovementBalanced() throws Exception
{
+ int numServers = 6;
+ for (int i = 0; i < numServers; i++) {
+ addFakeServerInstanceToAutoJoinHelixCluster(SERVER_INSTANCE_ID_PREFIX +
i, true);
+ }
+
+ // Create the table with default balanced segment assignment
+ TableConfig tableConfig =
+ new
TableConfigBuilder(TableType.OFFLINE).setTableName(RAW_TABLE_NAME).setNumReplicas(NUM_REPLICAS).build();
+
+ addDummySchema(RAW_TABLE_NAME);
+ _helixResourceManager.addTable(tableConfig);
+
+ // Add the segments
+ int numSegments = 10;
+ long nowInDays = TimeUnit.MILLISECONDS.toDays(System.currentTimeMillis());
+
+ for (int i = 0; i < numSegments; i++) {
+ _helixResourceManager.addNewSegment(OFFLINE_TIERED_TABLE_NAME,
+
SegmentMetadataMockUtils.mockSegmentMetadataWithEndTimeInfo(TIERED_TABLE_NAME,
SEGMENT_NAME_PREFIX + i,
+ nowInDays), null);
+ }
+
+ Map<String, Map<String, String>> oldSegmentAssignment =
+
_helixResourceManager.getTableIdealState(OFFLINE_TIERED_TABLE_NAME).getRecord().getMapFields();
+
+ TableRebalancer tableRebalancer = new TableRebalancer(_helixManager);
+
+ // Try dry-run summary mode
+ RebalanceConfig rebalanceConfig = new RebalanceConfig();
+ rebalanceConfig.setDryRun(true);
+ rebalanceConfig.setSummary(true);
+ rebalanceConfig.setReassignInstances(true);
+ rebalanceConfig.setMinimizeDataMovement(true);
+ RebalanceResult rebalanceResult = tableRebalancer.rebalance(tableConfig,
rebalanceConfig, null);
+
+ RebalanceSummaryResult rebalanceSummaryResult =
rebalanceResult.getRebalanceSummaryResult();
+ assertNotNull(rebalanceSummaryResult);
+ assertNotNull(rebalanceSummaryResult.getServerInfo());
+ RebalanceSummaryResult.ServerInfo rebalanceServerInfo =
rebalanceSummaryResult.getServerInfo();
+ assertEquals(rebalanceResult.getStatus(), RebalanceResult.Status.NO_OP);
+
assertEquals(rebalanceServerInfo.getNumServers().getExpectedValueAfterRebalance(),
numServers);
+
+ rebalanceResult = tableRebalancer.rebalance(tableConfig, new
RebalanceConfig(), null);
+ assertEquals(rebalanceResult.getStatus(), RebalanceResult.Status.NO_OP);
+ // Segment assignment should not change
+ assertEquals(rebalanceResult.getSegmentAssignment(), oldSegmentAssignment);
+
+ // add one server instance
+ addFakeServerInstanceToAutoJoinHelixCluster(SERVER_INSTANCE_ID_PREFIX,
true);
+
+ // Table without instance assignment config should work fine (ignore) with
the minimizeDataMovement flag set
+ // Try dry-run summary mode
+ rebalanceConfig = new RebalanceConfig();
+ rebalanceConfig.setDryRun(true);
+ rebalanceConfig.setSummary(true);
+ rebalanceConfig.setReassignInstances(true);
+ rebalanceConfig.setMinimizeDataMovement(true);
+ rebalanceResult = tableRebalancer.rebalance(tableConfig, rebalanceConfig,
null);
+
+ rebalanceSummaryResult = rebalanceResult.getRebalanceSummaryResult();
+ assertNotNull(rebalanceSummaryResult);
+ assertNotNull(rebalanceSummaryResult.getServerInfo());
+ rebalanceServerInfo = rebalanceSummaryResult.getServerInfo();
+ // Should see the added server
+ assertEquals(rebalanceResult.getStatus(), RebalanceResult.Status.DONE);
+
assertEquals(rebalanceServerInfo.getNumServers().getValueBeforeRebalance(),
numServers);
+
assertEquals(rebalanceServerInfo.getNumServers().getExpectedValueAfterRebalance(),
numServers + 1);
+
+
+ // Check if the instance assignment is the same as the one without
minimizeDataMovement flag set
+ rebalanceConfig = new RebalanceConfig();
+ rebalanceConfig.setDryRun(true);
+ rebalanceConfig.setSummary(true);
+ rebalanceConfig.setReassignInstances(true);
+ rebalanceConfig.setMinimizeDataMovement(false);
+ RebalanceResult rebalanceResultWithoutMinimized =
tableRebalancer.rebalance(tableConfig, rebalanceConfig, null);
+
+ assertEquals(rebalanceResult.getInstanceAssignment(),
rebalanceResultWithoutMinimized.getInstanceAssignment());
+
+ // Rebalance
+ rebalanceConfig = new RebalanceConfig();
+ rebalanceConfig.setReassignInstances(true);
+ rebalanceConfig.setMinimizeDataMovement(true);
+ rebalanceResult = tableRebalancer.rebalance(tableConfig, rebalanceConfig,
null);
+ // Should see the added server in the instance assignment
+ assertEquals(rebalanceResult.getStatus(), RebalanceResult.Status.DONE);
+
assertEquals(rebalanceResult.getInstanceAssignment().get(InstancePartitionsType.OFFLINE).getInstances(0,
0).size(), numServers + 1);
+
+ }
+
+ @Test
+ public void testRebalanceWithMinimizeDataMovementInstanceAssignments()
+ throws Exception {
+ int numServers = 6;
+ for (int i = 0; i < numServers; i++) {
+ addFakeServerInstanceToAutoJoinHelixCluster(SERVER_INSTANCE_ID_PREFIX +
i, true);
+ }
+
+ // One instance per replica group, no partition
+ InstanceAssignmentConfig instanceAssignmentConfig = new
InstanceAssignmentConfig(
+ new InstanceTagPoolConfig(TagNameUtils.getOfflineTagForTenant(null),
false, 0, null), null,
+ new InstanceReplicaGroupPartitionConfig(true, 0, NUM_REPLICAS, 1, 0,
0, false,
+ null), null, false);
+
+ // Create the table with default balanced segment assignment
+ TableConfig tableConfig =
+ new
TableConfigBuilder(TableType.OFFLINE).setTableName(RAW_TABLE_NAME).setNumReplicas(NUM_REPLICAS)
+ .setInstanceAssignmentConfigMap(Map.of("OFFLINE",
instanceAssignmentConfig)).build();
+
+ addDummySchema(RAW_TABLE_NAME);
+ _helixResourceManager.addTable(tableConfig);
+
+ // Add the segments
+ int numSegments = 10;
+ long nowInDays = TimeUnit.MILLISECONDS.toDays(System.currentTimeMillis());
+
+ for (int i = 0; i < numSegments; i++) {
+ _helixResourceManager.addNewSegment(OFFLINE_TABLE_NAME,
+
SegmentMetadataMockUtils.mockSegmentMetadataWithEndTimeInfo(RAW_TABLE_NAME,
SEGMENT_NAME_PREFIX + i,
+ nowInDays), null);
+ }
+
+ Map<String, Map<String, String>> oldSegmentAssignment =
+
_helixResourceManager.getTableIdealState(OFFLINE_TIERED_TABLE_NAME).getRecord().getMapFields();
Review Comment:
nit: is this the correct table? `OFFLINE_TIERED_TABLE_NAME`?
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