Package io.druid.server.coordinator

Examples of io.druid.server.coordinator.ServerHolder

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      for (int iter = 0; iter < maxSegmentsToMove; iter++) {
        final BalancerSegmentHolder segmentToMove = strategy.pickSegmentToMove(serverHolderList);

        if (segmentToMove != null && params.getAvailableSegments().contains(segmentToMove.getSegment())) {
          final ServerHolder holder = strategy.findNewSegmentHomeBalancer(segmentToMove.getSegment(), serverHolderList);

          if (holder != null) {
            moveSegment(segmentToMove, holder.getServer(), params);
          }
        }
      }
      stats.addToTieredStat("movedCount", tier, currentlyMovingSegments.get(tier).size());
      if (params.getCoordinatorDynamicConfig().emitBalancingStats()) {
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    final DataSegment segmentToMove = segment.getSegment();
    final String segmentName = segmentToMove.getIdentifier();

    if (!toPeon.getSegmentsToLoad().contains(segmentToMove) &&
        (toServer.getSegment(segmentName) == null) &&
        new ServerHolder(toServer, toPeon).getAvailableSize() > segmentToMove.getSize()) {
      log.info("Moving [%s] from [%s] to [%s]", segmentName, fromServer.getName(), toServer.getName());

      LoadPeonCallback callback = null;
      try {
        currentlyMovingSegments.get(toServer.getTier()).put(segmentName, segment);
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      if (replicate && !replicationManager.canCreateReplicant(tier)) {
        break;
      }

      final ServerHolder holder = strategy.findNewSegmentHomeReplicator(segment, serverHolderList);

      if (holder == null) {
        log.warn(
            "Not enough [%s] servers or node capacity to assign segment[%s]! Expected Replicants[%d]",
            tier,
            segment.getIdentifier(),
            expectedReplicantsInTier
        );
        break;
      }

      if (replicate) {
        replicationManager.registerReplicantCreation(
            tier, segment.getIdentifier(), holder.getServer().getHost()
        );
      }

      holder.getPeon().loadSegment(
          segment,
          new LoadPeonCallback()
          {
            @Override
            public void execute()
            {
              replicationManager.unregisterReplicantCreation(
                  tier,
                  segment.getIdentifier(),
                  holder.getServer().getHost()
              );
            }
          }
      );
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        return stats;
      }

      List<ServerHolder> droppedServers = Lists.newArrayList();
      while (loadedNumReplicantsForTier > expectedNumReplicantsForTier) {
        final ServerHolder holder = serverQueue.pollLast();
        if (holder == null) {
          log.warn("Wtf, holder was null?  I have no servers serving [%s]?", segment.getIdentifier());
          break;
        }

        if (holder.isServingSegment(segment)) {
          if (expectedNumReplicantsForTier > 0) { // don't throttle unless we are removing extra replicants
            if (!replicationManager.canDestroyReplicant(tier)) {
              serverQueue.add(holder);
              break;
            }

            replicationManager.registerReplicantTermination(
                tier,
                segment.getIdentifier(),
                holder.getServer().getHost()
            );
          }

          holder.getPeon().dropSegment(
              segment,
              new LoadPeonCallback()
              {
                @Override
                public void execute()
                {
                  replicationManager.unregisterReplicantTermination(
                      tier,
                      segment.getIdentifier(),
                      holder.getServer().getHost()
                  );
                }
              }
          );
          --loadedNumReplicantsForTier;
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      }

      EasyMock.expect(druidServer.getSegments()).andReturn(segments).anyTimes();

      EasyMock.replay(druidServer);
      serverHolderList.add(new ServerHolder(druidServer, fromPeon));
    }

    // The best server to be available for next segment assignment has only 98 Segments
    LoadQueuePeonTester fromPeon = new LoadQueuePeonTester();
    ImmutableDruidServer druidServer = EasyMock.createMock(ImmutableDruidServer.class);
    EasyMock.expect(druidServer.getName()).andReturn("BEST_SERVER").anyTimes();
    EasyMock.expect(druidServer.getCurrSize()).andReturn(3000L).anyTimes();
    EasyMock.expect(druidServer.getMaxSize()).andReturn(10000000L).anyTimes();

    EasyMock.expect(druidServer.getSegment(EasyMock.<String>anyObject())).andReturn(null).anyTimes();
    Map<String, DataSegment> segments = Maps.newHashMap();
    for (int j = 0; j < (maxSegments - 2); j++) {
      DataSegment segment = getSegment(j);
      segments.put(segment.getIdentifier(), segment);
      EasyMock.expect(druidServer.getSegment(segment.getIdentifier())).andReturn(segment).anyTimes();
    }
    EasyMock.expect(druidServer.getSegments()).andReturn(segments).anyTimes();

    EasyMock.replay(druidServer);
    serverHolderList.add(new ServerHolder(druidServer, fromPeon));
  }
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    setupDummyCluster(10, 20);
    DataSegment segment = getSegment(1000);

    final DateTime referenceTimestamp = new DateTime("2014-01-01");
    BalancerStrategy strategy = new CostBalancerStrategy(referenceTimestamp, 4);
    ServerHolder holder = strategy.findNewSegmentHomeReplicator(segment, serverHolderList);
    Assert.assertNotNull("Should be able to find a place for new segment!!", holder);
    Assert.assertEquals("Best Server should be BEST_SERVER", "BEST_SERVER", holder.getServer().getName());
  }
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    setupDummyCluster(10, 20);
    DataSegment segment = getSegment(1000);

    final DateTime referenceTimestamp = new DateTime("2014-01-01");
    BalancerStrategy strategy = new CostBalancerStrategy(referenceTimestamp, 1);
    ServerHolder holder = strategy.findNewSegmentHomeReplicator(segment, serverHolderList);
    Assert.assertNotNull("Should be able to find a place for new segment!!", holder);
    Assert.assertEquals("Best Server should be BEST_SERVER", "BEST_SERVER", holder.getServer().getName());
  }
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    DruidCluster druidCluster = new DruidCluster(
        ImmutableMap.of(
            "hot",
            MinMaxPriorityQueue.orderedBy(Ordering.natural().reverse()).create(
                Arrays.asList(
                    new ServerHolder(
                        new DruidServer(
                            "serverHot",
                            "hostHot",
                            1000,
                            "historical",
                            "hot",
                            0
                        ).toImmutableDruidServer(),
                        mockPeon
                    )
                )
            ),
            DruidServer.DEFAULT_TIER,
            MinMaxPriorityQueue.orderedBy(Ordering.natural().reverse()).create(
                Arrays.asList(
                    new ServerHolder(
                        new DruidServer(
                            "serverNorm",
                            "hostNorm",
                            1000,
                            "historical",
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    DruidCluster druidCluster = new DruidCluster(
        ImmutableMap.of(
            "hot",
            MinMaxPriorityQueue.orderedBy(Ordering.natural().reverse()).create(
                Arrays.asList(
                    new ServerHolder(
                        server1.toImmutableDruidServer(),
                        mockPeon
                    )
                )
            ),
            DruidServer.DEFAULT_TIER,
            MinMaxPriorityQueue.orderedBy(Ordering.natural().reverse()).create(
                Arrays.asList(
                    new ServerHolder(
                        server2.toImmutableDruidServer(),
                        mockPeon
                    )
                )
            )
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Related Classes of io.druid.server.coordinator.ServerHolder

  • io.druid.server.coordination.CostBalancerStrategyTest
  • io.druid.server.coordinator.helper.DruidCoordinatorBalancer
  • io.druid.server.coordinator.rules.LoadRule
  • io.druid.server.coordinator.rules.LoadRuleTest
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