somandal commented on code in PR #15617:
URL: https://github.com/apache/pinot/pull/15617#discussion_r2085025521
##########
pinot-controller/src/test/java/org/apache/pinot/controller/helix/core/rebalance/TableRebalancerTest.java:
##########
@@ -1438,4 +1464,1011 @@ public void testIsExternalViewConverged() {
}
}
}
+
+ @Test
+ public void testAssignmentWithServerBatching() {
+ // Using LLC segment naming so that batching can be tested for both
non-strict replica group and strict replica
+ // group based assignment. Otherwise, the partitionId might have to be
fetched from ZK SegmentMetadata which will
+ // not exist since these aren't actual tables
+ // Current assignment:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host3": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host3": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // }
+ // }
+ Map<String, Map<String, String>> currentAssignment = new TreeMap<>();
+ currentAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host2", "host3"), ONLINE));
+ currentAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host3", "host4"), ONLINE));
+ currentAssignment.put("segment__3__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host2", "host3"), ONLINE));
+ currentAssignment.put("segment__4__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host3", "host4"), ONLINE));
+
+ // Target assignment 1:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // }
+ // }
+ Map<String, Map<String, String>> targetAssignment = new TreeMap<>();
+ targetAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host5"), ONLINE));
+ targetAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__3__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host5"), ONLINE));
+ targetAssignment.put("segment__4__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+
+ // Number of segments to offload:
+ // {
+ // "host1": 0,
+ // "host2": 2,
+ // "host3": 2,
+ // "host4": 0,
+ // "host5": -2,
+ // "host6": -2
+ // }
+ Map<String, Integer> numSegmentsToOffloadMap =
+ TableRebalancer.getNumSegmentsToOffloadMap(currentAssignment,
targetAssignment);
+ assertEquals(numSegmentsToOffloadMap.size(), 6);
+ assertEquals((int) numSegmentsToOffloadMap.get("host1"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host2"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host3"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host4"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host5"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host6"), -2);
+
+ // Next assignment with 2 minimum available replicas with or without
strict replica-group should reach the target
+ // assignment after two steps. Batch size = 1, unique partitionIds
+ for (boolean enableStrictReplicaGroup : Arrays.asList(false, true)) {
+ Object2IntOpenHashMap<String> segmentToPartitionIdMap = new
Object2IntOpenHashMap<>();
+ Map<String, Map<String, String>> nextAssignment =
+ TableRebalancer.getNextAssignment(currentAssignment,
targetAssignment, 2, enableStrictReplicaGroup, false,
+ 1, segmentToPartitionIdMap, SIMPLE_PARTITION_FETCHER);
+ assertNotEquals(nextAssignment, targetAssignment);
+ assertEquals(nextAssignment.get("segment__1__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host3", "host5")));
+ assertEquals(nextAssignment.get("segment__2__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host4", "host6")));
+ assertEquals(nextAssignment.get("segment__3__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host2", "host3")));
+ assertEquals(nextAssignment.get("segment__4__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host3", "host4")));
+ nextAssignment =
+ TableRebalancer.getNextAssignment(nextAssignment, targetAssignment,
2, enableStrictReplicaGroup, false,
+ 1, segmentToPartitionIdMap, SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment, targetAssignment);
+ }
+
+ // Next assignment with 2 minimum available replicas with our without
strict replica-group should reach the target
+ // assignment after one steps. Batch size = 2, unique partitionIds
+ for (boolean enableStrictReplicaGroup : Arrays.asList(false, true)) {
+ Object2IntOpenHashMap<String> segmentToPartitionIdMap = new
Object2IntOpenHashMap<>();
+ Map<String, Map<String, String>> nextAssignment =
+ TableRebalancer.getNextAssignment(currentAssignment,
targetAssignment, 2, enableStrictReplicaGroup, false,
+ 2, segmentToPartitionIdMap, SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment, targetAssignment);
+ }
+
+ // Target assignment 2:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // }
+ // }
+ targetAssignment = new TreeMap<>();
+ targetAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host4", "host5"), ONLINE));
+ targetAssignment.put("segment__3__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__4__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host4", "host5"), ONLINE));
+
+ // Number of segments to offload:
+ // {
+ // "host1": 0,
+ // "host2": 2,
+ // "host3": 4,
+ // "host4": -2,
+ // "host5": -2,
+ // "host6": -2
+ // }
+ numSegmentsToOffloadMap =
TableRebalancer.getNumSegmentsToOffloadMap(currentAssignment, targetAssignment);
+ assertEquals(numSegmentsToOffloadMap.size(), 6);
+ assertEquals((int) numSegmentsToOffloadMap.get("host1"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host2"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host3"), 4);
+ assertEquals((int) numSegmentsToOffloadMap.get("host4"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host5"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host6"), -2);
+
+ // Next assignment with 2 minimum available replicas with or without
strict replica-group should finish in 3 steps
+ // with batching with batchSizePerServer = 1:
+ //
+ // The first assignment will move "segment1" and "segment2" by one host at
a time, and since the other segments
+ // if added will go beyond batchSizePerServer, they'll be picked up on the
next two assignments (host4 and host2):
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host3": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // }
+ // }
+ // Second Assignment (host6, host1, host4, and host5 get 1 segment each):
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host5": "ONLINE"
+ // }
+ // }
+ //
+ // The third assignment should reach the target assignment
+ for (boolean enableStrictReplicaGroup : Arrays.asList(false, true)) {
+ Map<String, Map<String, String>> nextAssignment =
+ TableRebalancer.getNextAssignment(currentAssignment,
targetAssignment, 2, enableStrictReplicaGroup, false,
+ 1, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment.get("segment__1__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host2", "host4")));
+ assertEquals(nextAssignment.get("segment__2__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host4", "host5")));
+ assertEquals(nextAssignment.get("segment__3__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host2", "host3")));
+ assertEquals(nextAssignment.get("segment__4__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host3", "host4")));
+
+ nextAssignment =
+ TableRebalancer.getNextAssignment(nextAssignment, targetAssignment,
2, enableStrictReplicaGroup, false,
+ 1, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment.get("segment__1__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host4", "host6")));
+ assertEquals(nextAssignment.get("segment__2__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host4", "host5")));
+ assertEquals(nextAssignment.get("segment__3__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host2", "host4")));
+ assertEquals(nextAssignment.get("segment__4__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host4", "host5")));
+
+ nextAssignment =
+ TableRebalancer.getNextAssignment(nextAssignment, targetAssignment,
2, enableStrictReplicaGroup, false,
+ 1, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment, targetAssignment);
+ }
+
+ // Target assignment 3:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // }
+ // }
+ targetAssignment = new TreeMap<>();
+ targetAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host4"), ONLINE));
+ targetAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host4"), ONLINE));
+ targetAssignment.put("segment__3__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host4"), ONLINE));
+ targetAssignment.put("segment__4__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host4"), ONLINE));
+
+ // Number of segments to offload:
+ // {
+ // "host1": -2,
+ // "host2": 4,
+ // "host3": 0,
+ // "host4": -2
+ // }
+ numSegmentsToOffloadMap =
TableRebalancer.getNumSegmentsToOffloadMap(currentAssignment, targetAssignment);
+ assertEquals(numSegmentsToOffloadMap.size(), 4);
+ assertEquals((int) numSegmentsToOffloadMap.get("host1"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host2"), 4);
+ assertEquals((int) numSegmentsToOffloadMap.get("host3"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host4"), -2);
+
+ // Next assignment with 2 minimum available replicas without strict
replica-group should reach the target assignment
+ // in 1 step using batchSizePerServer = 2
+ Map<String, Map<String, String>> nextAssignment =
+ TableRebalancer.getNextAssignment(currentAssignment, targetAssignment,
2, false, false,
+ 2, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment, targetAssignment);
+
+ // Next assignment with 2 minimum available replicas with strict
replica-group should finish in 2 steps even with
+ // batchSizePerServer = 2:
+ //
+ // The first assignment will bring "segment1" and "segment3" to the target
state. It cannot bring "segment2" and
+ // "segment4" to the target state because "host1" and "host4" might be
unavailable for strict replica-group routing,
+ // which breaks the minimum available replicas requirement:
+ // {
+ // "segment1": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment2": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment3": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment4": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // }
+ // }
+ //
+ // The second assignment should reach the target assignment
+ nextAssignment = TableRebalancer.getNextAssignment(currentAssignment,
targetAssignment, 2, true, false,
+ 2, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment.get("segment__1__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host3", "host4")));
+ assertEquals(nextAssignment.get("segment__2__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host3", "host4")));
+ assertEquals(nextAssignment.get("segment__3__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host3", "host4")));
+ assertEquals(nextAssignment.get("segment__4__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host3", "host4")));
+ nextAssignment = TableRebalancer.getNextAssignment(nextAssignment,
targetAssignment, 2, true, false,
+ 2, new Object2IntOpenHashMap<>(), SIMPLE_PARTITION_FETCHER);
+ assertEquals(nextAssignment, targetAssignment);
+
+ // Try assignment with overlapping partitions across segments, especially
for strict replica group based.
+ // Non-strict replica group based should not matter
+ // Current assignment:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host3": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // },
+ // "segment__1__1__98347869999L": {
+ // "host1": "ONLINE",
+ // "host2": "ONLINE",
+ // "host3": "ONLINE"
+ // },
+ // "segment__2__1__98347869999L": {
+ // "host2": "ONLINE",
+ // "host3": "ONLINE",
+ // "host4": "ONLINE"
+ // }
+ // }
+ currentAssignment = new TreeMap<>();
+ currentAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host2", "host3"), ONLINE));
+ currentAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host3", "host4"), ONLINE));
+ currentAssignment.put("segment__1__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host2", "host3"), ONLINE));
+ currentAssignment.put("segment__2__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host3", "host4"), ONLINE));
+
+ // Target assignment 1 with just 2 overall partitions instead of 4 unique
ones:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__1__1__98347869999L": {
+ // "host1": "ONLINE",
+ // "host3": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__2__1__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // }
+ // }
+ targetAssignment = new TreeMap<>();
+ targetAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host5"), ONLINE));
+ targetAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__1__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host3", "host5"), ONLINE));
+ targetAssignment.put("segment__2__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+
+ // Number of segments to offload:
+ // {
+ // "host1": 0,
+ // "host2": 2,
+ // "host3": 2,
+ // "host4": 0,
+ // "host5": -2,
+ // "host6": -2
+ // }
+ numSegmentsToOffloadMap =
+ TableRebalancer.getNumSegmentsToOffloadMap(currentAssignment,
targetAssignment);
+ assertEquals(numSegmentsToOffloadMap.size(), 6);
+ assertEquals((int) numSegmentsToOffloadMap.get("host1"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host2"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host3"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host4"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host5"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host6"), -2);
+
+ // Next assignment with 2 minimum available replicas without strict
replica-group should reach the target
+ // assignment after two steps. With strict replica groups it should reach
the target assignment immediately since
+ // the full partition must be selected for movement. Batch size = 1,
unique partitionIds
+ for (boolean enableStrictReplicaGroup : Arrays.asList(false, true)) {
+ Object2IntOpenHashMap<String> segmentToPartitionIdMap = new
Object2IntOpenHashMap<>();
+ nextAssignment =
+ TableRebalancer.getNextAssignment(currentAssignment,
targetAssignment, 2, enableStrictReplicaGroup, false,
+ 1, segmentToPartitionIdMap, SIMPLE_PARTITION_FETCHER);
+ if (!enableStrictReplicaGroup) {
+ // Nothing should change, since we don't select based on partitions
for non-strict replica groups
+ assertNotEquals(nextAssignment, targetAssignment);
+
assertEquals(nextAssignment.get("segment__1__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host3", "host5")));
+
assertEquals(nextAssignment.get("segment__2__0__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host4", "host6")));
+
assertEquals(nextAssignment.get("segment__1__1__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host1", "host2", "host3")));
+
assertEquals(nextAssignment.get("segment__2__1__98347869999L").keySet(),
+ new TreeSet<>(Arrays.asList("host2", "host3", "host4")));
+ nextAssignment =
+ TableRebalancer.getNextAssignment(nextAssignment,
targetAssignment, 2, enableStrictReplicaGroup, false,
+ 1, segmentToPartitionIdMap, SIMPLE_PARTITION_FETCHER);
+ }
+ assertEquals(nextAssignment, targetAssignment);
+ }
+
+ // Target assignment 2 with just 2 unique partitions:
+ // {
+ // "segment__1__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__2__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // },
+ // "segment__3__0__98347869999L": {
+ // "host2": "ONLINE",
+ // "host4": "ONLINE",
+ // "host6": "ONLINE"
+ // },
+ // "segment__4__0__98347869999L": {
+ // "host1": "ONLINE",
+ // "host4": "ONLINE",
+ // "host5": "ONLINE"
+ // }
+ // }
+ targetAssignment = new TreeMap<>();
+ targetAssignment.put("segment__1__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__2__0__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host4", "host5"), ONLINE));
+ targetAssignment.put("segment__1__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host2",
"host4", "host6"), ONLINE));
+ targetAssignment.put("segment__2__1__98347869999L",
+ SegmentAssignmentUtils.getInstanceStateMap(Arrays.asList("host1",
"host4", "host5"), ONLINE));
+
+ // Number of segments to offload:
+ // {
+ // "host1": 0,
+ // "host2": 2,
+ // "host3": 4,
+ // "host4": -2,
+ // "host5": -2,
+ // "host6": -2
+ // }
+ numSegmentsToOffloadMap =
+ TableRebalancer.getNumSegmentsToOffloadMap(currentAssignment,
targetAssignment);
+ assertEquals(numSegmentsToOffloadMap.size(), 6);
+ assertEquals((int) numSegmentsToOffloadMap.get("host1"), 0);
+ assertEquals((int) numSegmentsToOffloadMap.get("host2"), 2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host3"), 4);
+ assertEquals((int) numSegmentsToOffloadMap.get("host4"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host5"), -2);
+ assertEquals((int) numSegmentsToOffloadMap.get("host6"), -2);
+
+ // Next assignment with 2 minimum available replicas without strict
replica-group should reach the target
+ // assignment after two steps. With strict replica groups it should reach
the target assignment immediately since
Review Comment:
yes that's right, fixed (so many copy paste errors 😂 )
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