Examples with BroadcastDistributionRule org.apache.druid.server.coordinator.rules.BroadcastDistributionRule used on opensource projects

Example 1 with BroadcastDistributionRule

use of org.apache.druid.server.coordinator.rules.BroadcastDistributionRule in project druid by druid-io.

the class UnloadUnusedSegments method handleUnusedSegmentsForServer.

private void handleUnusedSegmentsForServer(ServerHolder serverHolder, Set<DataSegment> usedSegments, DruidCoordinatorRuntimeParams params, CoordinatorStats stats, boolean dropBroadcastOnly, Map<String, Boolean> broadcastStatusByDatasource) {
    ImmutableDruidServer server = serverHolder.getServer();
    for (ImmutableDruidDataSource dataSource : server.getDataSources()) {
        boolean isBroadcastDatasource = broadcastStatusByDatasource.computeIfAbsent(dataSource.getName(), (dataSourceName) -> {
            List<Rule> rules = params.getDatabaseRuleManager().getRulesWithDefault(dataSource.getName());
            for (Rule rule : rules) {
                // A datasource is considered a broadcast datasource if it has any broadcast rules.
                if (rule instanceof BroadcastDistributionRule) {
                    return true;
                }
            }
            return false;
        });
        // the set of segments that were created by a task/indexer here, and exclude them.
        if (dropBroadcastOnly && !isBroadcastDatasource) {
            continue;
        }
        for (DataSegment segment : dataSource.getSegments()) {
            if (!usedSegments.contains(segment)) {
                LoadQueuePeon queuePeon = params.getLoadManagementPeons().get(server.getName());
                if (!queuePeon.getSegmentsToDrop().contains(segment)) {
                    queuePeon.dropSegment(segment, () -> {
                    });
                    stats.addToTieredStat("unneededCount", server.getTier(), 1);
                    log.info("Dropping uneeded segment [%s] from server [%s] in tier [%s]", segment.getId(), server.getName(), server.getTier());
                }
            }
        }
    }
}

Example 2 with BroadcastDistributionRule

use of org.apache.druid.server.coordinator.rules.BroadcastDistributionRule in project druid by druid-io.

the class RunRules method run.

@Override
public DruidCoordinatorRuntimeParams run(DruidCoordinatorRuntimeParams params) {
    replicatorThrottler.updateParams(coordinator.getDynamicConfigs().getReplicationThrottleLimit(), coordinator.getDynamicConfigs().getReplicantLifetime(), false);
    CoordinatorStats stats = new CoordinatorStats();
    DruidCluster cluster = params.getDruidCluster();
    if (cluster.isEmpty()) {
        log.warn("Uh... I have no servers. Not assigning anything...");
        return params;
    }
    // Get used segments which are overshadowed by other used segments. Those would not need to be loaded and
    // eventually will be unloaded from Historical servers. Segments overshadowed by *served* used segments are marked
    // as unused in MarkAsUnusedOvershadowedSegments, and then eventually Coordinator sends commands to Historical nodes
    // to unload such segments in UnloadUnusedSegments.
    Set<SegmentId> overshadowed = params.getDataSourcesSnapshot().getOvershadowedSegments();
    for (String tier : cluster.getTierNames()) {
        replicatorThrottler.updateReplicationState(tier);
    }
    DruidCoordinatorRuntimeParams paramsWithReplicationManager = params.buildFromExistingWithoutSegmentsMetadata().withReplicationManager(replicatorThrottler).build();
    // Run through all matched rules for used segments
    DateTime now = DateTimes.nowUtc();
    MetadataRuleManager databaseRuleManager = paramsWithReplicationManager.getDatabaseRuleManager();
    final List<SegmentId> segmentsWithMissingRules = Lists.newArrayListWithCapacity(MAX_MISSING_RULES);
    int missingRules = 0;
    final Set<String> broadcastDatasources = new HashSet<>();
    for (ImmutableDruidDataSource dataSource : params.getDataSourcesSnapshot().getDataSourcesMap().values()) {
        List<Rule> rules = databaseRuleManager.getRulesWithDefault(dataSource.getName());
        for (Rule rule : rules) {
            // executes before BalanceSegments.
            if (rule instanceof BroadcastDistributionRule) {
                broadcastDatasources.add(dataSource.getName());
                break;
            }
        }
    }
    for (DataSegment segment : params.getUsedSegments()) {
        if (overshadowed.contains(segment.getId())) {
            // Skipping overshadowed segments
            continue;
        }
        List<Rule> rules = databaseRuleManager.getRulesWithDefault(segment.getDataSource());
        boolean foundMatchingRule = false;
        for (Rule rule : rules) {
            if (rule.appliesTo(segment, now)) {
                if (stats.getGlobalStat("totalNonPrimaryReplicantsLoaded") >= paramsWithReplicationManager.getCoordinatorDynamicConfig().getMaxNonPrimaryReplicantsToLoad() && !paramsWithReplicationManager.getReplicationManager().isLoadPrimaryReplicantsOnly()) {
                    log.info("Maximum number of non-primary replicants [%d] have been loaded for the current RunRules execution. Only loading primary replicants from here on for this coordinator run cycle.", paramsWithReplicationManager.getCoordinatorDynamicConfig().getMaxNonPrimaryReplicantsToLoad());
                    paramsWithReplicationManager.getReplicationManager().setLoadPrimaryReplicantsOnly(true);
                }
                stats.accumulate(rule.run(coordinator, paramsWithReplicationManager, segment));
                foundMatchingRule = true;
                break;
            }
        }
        if (!foundMatchingRule) {
            if (segmentsWithMissingRules.size() < MAX_MISSING_RULES) {
                segmentsWithMissingRules.add(segment.getId());
            }
            missingRules++;
        }
    }
    if (!segmentsWithMissingRules.isEmpty()) {
        log.makeAlert("Unable to find matching rules!").addData("segmentsWithMissingRulesCount", missingRules).addData("segmentsWithMissingRules", segmentsWithMissingRules).emit();
    }
    return params.buildFromExisting().withCoordinatorStats(stats).withBroadcastDatasources(broadcastDatasources).build();
}