Examples with GranularitySpec io.druid.segment.indexing.granularity.GranularitySpec used on opensource projects

Example 1 with GranularitySpec

use of io.druid.segment.indexing.granularity.GranularitySpec in project druid by druid-io.

the class IndexTask method generateAndPublishSegments.

private boolean generateAndPublishSegments(final TaskToolbox toolbox, final DataSchema dataSchema, final Map<Interval, List<ShardSpec>> shardSpecs, final String version, final FirehoseFactory firehoseFactory) throws IOException, InterruptedException {
    final GranularitySpec granularitySpec = dataSchema.getGranularitySpec();
    final FireDepartment fireDepartmentForMetrics = new FireDepartment(dataSchema, new RealtimeIOConfig(null, null, null), null);
    final FireDepartmentMetrics fireDepartmentMetrics = fireDepartmentForMetrics.getMetrics();
    final Map<String, ShardSpec> sequenceNameToShardSpecMap = Maps.newHashMap();
    if (toolbox.getMonitorScheduler() != null) {
        toolbox.getMonitorScheduler().addMonitor(new RealtimeMetricsMonitor(ImmutableList.of(fireDepartmentForMetrics), ImmutableMap.of(DruidMetrics.TASK_ID, new String[] { getId() })));
    }
    final SegmentAllocator segmentAllocator;
    if (ingestionSchema.getIOConfig().isAppendToExisting()) {
        segmentAllocator = new ActionBasedSegmentAllocator(toolbox.getTaskActionClient(), dataSchema);
    } else {
        segmentAllocator = new SegmentAllocator() {

            @Override
            public SegmentIdentifier allocate(DateTime timestamp, String sequenceName, String previousSegmentId) throws IOException {
                Optional<Interval> interval = granularitySpec.bucketInterval(timestamp);
                if (!interval.isPresent()) {
                    throw new ISE("Could not find interval for timestamp [%s]", timestamp);
                }
                ShardSpec shardSpec = sequenceNameToShardSpecMap.get(sequenceName);
                if (shardSpec == null) {
                    throw new ISE("Could not find ShardSpec for sequenceName [%s]", sequenceName);
                }
                return new SegmentIdentifier(getDataSource(), interval.get(), version, shardSpec);
            }
        };
    }
    try (final Appenderator appenderator = newAppenderator(fireDepartmentMetrics, toolbox, dataSchema);
        final FiniteAppenderatorDriver driver = newDriver(appenderator, toolbox, segmentAllocator, fireDepartmentMetrics);
        final Firehose firehose = firehoseFactory.connect(dataSchema.getParser())) {
        final Supplier<Committer> committerSupplier = Committers.supplierFromFirehose(firehose);
        final Map<Interval, ShardSpecLookup> shardSpecLookups = Maps.newHashMap();
        if (driver.startJob() != null) {
            driver.clear();
        }
        try {
            while (firehose.hasMore()) {
                try {
                    final InputRow inputRow = firehose.nextRow();
                    final Optional<Interval> optInterval = granularitySpec.bucketInterval(inputRow.getTimestamp());
                    if (!optInterval.isPresent()) {
                        fireDepartmentMetrics.incrementThrownAway();
                        continue;
                    }
                    final Interval interval = optInterval.get();
                    if (!shardSpecLookups.containsKey(interval)) {
                        final List<ShardSpec> intervalShardSpecs = shardSpecs.get(interval);
                        if (intervalShardSpecs == null || intervalShardSpecs.isEmpty()) {
                            throw new ISE("Failed to get shardSpec for interval[%s]", interval);
                        }
                        shardSpecLookups.put(interval, intervalShardSpecs.get(0).getLookup(intervalShardSpecs));
                    }
                    final ShardSpec shardSpec = shardSpecLookups.get(interval).getShardSpec(inputRow.getTimestampFromEpoch(), inputRow);
                    final String sequenceName = String.format("index_%s_%s_%d", interval, version, shardSpec.getPartitionNum());
                    if (!sequenceNameToShardSpecMap.containsKey(sequenceName)) {
                        final ShardSpec shardSpecForPublishing = ingestionSchema.getTuningConfig().isForceExtendableShardSpecs() || ingestionSchema.getIOConfig().isAppendToExisting() ? new NumberedShardSpec(shardSpec.getPartitionNum(), shardSpecs.get(interval).size()) : shardSpec;
                        sequenceNameToShardSpecMap.put(sequenceName, shardSpecForPublishing);
                    }
                    final SegmentIdentifier identifier = driver.add(inputRow, sequenceName, committerSupplier);
                    if (identifier == null) {
                        throw new ISE("Could not allocate segment for row with timestamp[%s]", inputRow.getTimestamp());
                    }
                    fireDepartmentMetrics.incrementProcessed();
                } catch (ParseException e) {
                    if (ingestionSchema.getTuningConfig().isReportParseExceptions()) {
                        throw e;
                    } else {
                        fireDepartmentMetrics.incrementUnparseable();
                    }
                }
            }
        } finally {
            driver.persist(committerSupplier.get());
        }
        final TransactionalSegmentPublisher publisher = new TransactionalSegmentPublisher() {

            @Override
            public boolean publishSegments(Set<DataSegment> segments, Object commitMetadata) throws IOException {
                final SegmentTransactionalInsertAction action = new SegmentTransactionalInsertAction(segments, null, null);
                return toolbox.getTaskActionClient().submit(action).isSuccess();
            }
        };
        final SegmentsAndMetadata published = driver.finish(publisher, committerSupplier.get());
        if (published == null) {
            log.error("Failed to publish segments, aborting!");
            return false;
        } else {
            log.info("Published segments[%s]", Joiner.on(", ").join(Iterables.transform(published.getSegments(), new Function<DataSegment, String>() {

                @Override
                public String apply(DataSegment input) {
                    return input.getIdentifier();
                }
            })));
            return true;
        }
    }
}

Example 2 with GranularitySpec

use of io.druid.segment.indexing.granularity.GranularitySpec in project druid by druid-io.

the class IndexTask method determineShardSpecs.

/**
   * Determines the number of shards for each interval using a hash of queryGranularity timestamp + all dimensions (i.e
   * hash-based partitioning). In the future we may want to also support single-dimension partitioning.
   */
private Map<Interval, List<ShardSpec>> determineShardSpecs(final TaskToolbox toolbox, final FirehoseFactory firehoseFactory) throws IOException {
    final ObjectMapper jsonMapper = toolbox.getObjectMapper();
    final GranularitySpec granularitySpec = ingestionSchema.getDataSchema().getGranularitySpec();
    final Granularity queryGranularity = granularitySpec.getQueryGranularity();
    final boolean determineNumPartitions = ingestionSchema.getTuningConfig().getNumShards() == null;
    final boolean determineIntervals = !ingestionSchema.getDataSchema().getGranularitySpec().bucketIntervals().isPresent();
    final Map<Interval, List<ShardSpec>> shardSpecs = Maps.newHashMap();
    // if we were given number of shards per interval and the intervals, we don't need to scan the data
    if (!determineNumPartitions && !determineIntervals) {
        log.info("numShards and intervals provided, skipping determine partition scan");
        final SortedSet<Interval> intervals = ingestionSchema.getDataSchema().getGranularitySpec().bucketIntervals().get();
        final int numShards = ingestionSchema.getTuningConfig().getNumShards();
        for (Interval interval : intervals) {
            final List<ShardSpec> intervalShardSpecs = Lists.newArrayListWithCapacity(numShards);
            if (numShards > 1) {
                for (int i = 0; i < numShards; i++) {
                    intervalShardSpecs.add(new HashBasedNumberedShardSpec(i, numShards, null, jsonMapper));
                }
            } else {
                intervalShardSpecs.add(NoneShardSpec.instance());
            }
            shardSpecs.put(interval, intervalShardSpecs);
        }
        return shardSpecs;
    }
    // determine intervals containing data and prime HLL collectors
    final Map<Interval, Optional<HyperLogLogCollector>> hllCollectors = Maps.newHashMap();
    int thrownAway = 0;
    log.info("Determining intervals and shardSpecs");
    long determineShardSpecsStartMillis = System.currentTimeMillis();
    try (final Firehose firehose = firehoseFactory.connect(ingestionSchema.getDataSchema().getParser())) {
        while (firehose.hasMore()) {
            final InputRow inputRow = firehose.nextRow();
            final Interval interval;
            if (determineIntervals) {
                interval = granularitySpec.getSegmentGranularity().bucket(inputRow.getTimestamp());
            } else {
                final Optional<Interval> optInterval = granularitySpec.bucketInterval(inputRow.getTimestamp());
                if (!optInterval.isPresent()) {
                    thrownAway++;
                    continue;
                }
                interval = optInterval.get();
            }
            if (!determineNumPartitions) {
                // for the interval and don't instantiate a HLL collector
                if (!hllCollectors.containsKey(interval)) {
                    hllCollectors.put(interval, Optional.<HyperLogLogCollector>absent());
                }
                continue;
            }
            if (!hllCollectors.containsKey(interval)) {
                hllCollectors.put(interval, Optional.of(HyperLogLogCollector.makeLatestCollector()));
            }
            List<Object> groupKey = Rows.toGroupKey(queryGranularity.bucketStart(inputRow.getTimestamp()).getMillis(), inputRow);
            hllCollectors.get(interval).get().add(hashFunction.hashBytes(jsonMapper.writeValueAsBytes(groupKey)).asBytes());
        }
    }
    if (thrownAway > 0) {
        log.warn("Unable to to find a matching interval for [%,d] events", thrownAway);
    }
    final ImmutableSortedMap<Interval, Optional<HyperLogLogCollector>> sortedMap = ImmutableSortedMap.copyOf(hllCollectors, Comparators.intervalsByStartThenEnd());
    for (final Map.Entry<Interval, Optional<HyperLogLogCollector>> entry : sortedMap.entrySet()) {
        final Interval interval = entry.getKey();
        final Optional<HyperLogLogCollector> collector = entry.getValue();
        final int numShards;
        if (determineNumPartitions) {
            final long numRows = new Double(collector.get().estimateCardinality()).longValue();
            numShards = (int) Math.ceil((double) numRows / ingestionSchema.getTuningConfig().getTargetPartitionSize());
            log.info("Estimated [%,d] rows of data for interval [%s], creating [%,d] shards", numRows, interval, numShards);
        } else {
            numShards = ingestionSchema.getTuningConfig().getNumShards();
            log.info("Creating [%,d] shards for interval [%s]", numShards, interval);
        }
        final List<ShardSpec> intervalShardSpecs = Lists.newArrayListWithCapacity(numShards);
        if (numShards > 1) {
            for (int i = 0; i < numShards; i++) {
                intervalShardSpecs.add(new HashBasedNumberedShardSpec(i, numShards, null, jsonMapper));
            }
        } else {
            intervalShardSpecs.add(NoneShardSpec.instance());
        }
        shardSpecs.put(interval, intervalShardSpecs);
    }
    log.info("Found intervals and shardSpecs in %,dms", System.currentTimeMillis() - determineShardSpecsStartMillis);
    return shardSpecs;
}