Apache Druid v0.18.1 Documentation
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2021-04-05 22:32:30
Apache Avro
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Configuration
Configuration reference
Logging
Extensions
Design
Metadata storage
Design
Deep storage
Processes and servers
Segments
ZooKeeper
Development
Versioning
Developing on Druid
Experimental features
Creating extensions
Build from source
JavaScript functionality
Getting started
Single server deployment
Introduction to Apache Druid
Quickstart
Clustered deployment
Docker
Hidden
Overlord Process
Graphite Emitter
Approximate Histogram aggregators
Rackspace Cloud Files
Apache Druid vs Kudu
Moving Average Query
HDFS
Moment Sketches for Approximate Quantiles module
ORC Extension
DistinctCount Aggregator
Select
InfluxDB Emitter
Globally Cached Lookups
Coordinator Process
Google Cloud Storage
Apache Parquet Extension
StatsD Emitter
Apache Druid vs. Key/Value Stores (HBase/Cassandra/OpenTSDB)
Apache Kafka Lookups
DataSketches Quantiles Sketch module
Apache Druid vs Spark
Druid Redis Cache
Broker
Apache Druid vs Elasticsearch
Timestamp Min/Max aggregators
Cardinality/HyperUnique aggregators
DataSketches Theta Sketch module
Apache Druid vs SQL-on-Hadoop
Apache Cassandra
Materialized View
DataSketches HLL Sketch module
T-Digest Quantiles Sketch module
DataSketches extension
Bloom Filter
DataSketches Tuple Sketch module
InfluxDB Line Protocol Parser
Historical Process
Simple SSLContext Provider Module
Realtime Process
Ambari Metrics Emitter
PostgreSQL Metadata Store
Router Process
Authentication and Authorization
Protobuf
Apache Druid vs Redshift
OpenTSDB Emitter
Microsoft SQLServer
S3-compatible
Indexer Process
Microsoft Azure
Test Stats Aggregators
Thrift
Kafka Emitter
MiddleManager Process
Peons
Apache Avro
Basic Security
MySQL Metadata Store
Kerberos
Cached Lookup Module
Indexing Service
Stats aggregator
Ingestion
Data management
Ingestion
Data formats
Schema design tips
Batch ingestion
Native batch
Troubleshooting FAQ
Task reference
Hadoop-based
Stream ingestion
Amazon Kinesis
Apache Kafka
Tranquility
Misc
Papers
Operations
reset-cluster tool
insert-segment-to-db tool
pull-deps tool
Rolling updates
API reference
Metrics
Password providers
Basic cluster tuning
High availability
Retaining or automatically dropping data
HTTP compression
Alerts
Management UIs
Working with different versions of Apache Hadoop
TLS support
dump-segment tool
Misc
Content for build.sbt
Web console
Export Metadata Tool
Deep storage migration
Getting started with Apache Druid
Metadata Migration
Segment Size Optimization
Querying
Druid SQL
Native queries
Query execution
Concepts
Query caching
Multi-value dimensions
Datasources
Context parameters
Lookups
Joins
Multitenancy
Native query components
Filters
Dimensions
Virtual columns
Sorting and limiting (groupBy)
Spatial filters
Granularities
String comparators
Sorting (topN)
Post-aggregations
Having filters (groupBy)
Aggregations
Expressions
Native query types
DatasourceMetadata
TopN
SegmentMetadata
GroupBy
Scan
TimeBoundary
Timeseries
Search
Tutorials
Configuring data retention
Loading files natively
Writing an ingestion spec
Compacting segments
Transforming input data
Deleting data
Querying data
Roll-up
Load from Apache Kafka
Updating existing data
Load from Apache Hadoop
Kerberized HDFS deep storage
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