Apache Druid v0.21.1 Documentation
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DataSketches extension
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2021-09-24 08:10:02
DataSketches extension
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Configuration
Extensions
Logging
Configuration reference
Design
Processes and servers
Deep storage
Segments
Metadata storage
ZooKeeper
Design
Development
Versioning
Experimental features
Developing on Druid
Build from source
JavaScript functionality
Creating extensions
Getting started
Quickstart
Clustered deployment
Docker
Introduction to Apache Druid
Single server deployment
Hidden
ORC Extension
Apache Cassandra
PostgreSQL Metadata Store
Microsoft SQLServer
MiddleManager Process
InfluxDB Emitter
Apache Kafka Lookups
Authentication and Authorization
Coordinator Process
Google Cloud Storage
HDFS
Overlord Process
StatsD Emitter
Peons
DataSketches HLL Sketch module
Druid Redis Cache
DataSketches Tuple Sketch module
Apache Druid vs. Key/Value Stores (HBase/Cassandra/OpenTSDB)
Kafka Emitter
Aliyun OSS
Apache Druid vs SQL-on-Hadoop
MySQL Metadata Store
Apache Druid vs Spark
DataSketches Quantiles Sketch module
DistinctCount Aggregator
Apache Ranger Security
Kerberos
GCE Extensions
Stats aggregator
Simple SSLContext Provider Module
Moving Average Query
OpenTSDB Emitter
Apache Druid vs Kudu
Rackspace Cloud Files
Globally Cached Lookups
Apache Druid vs Elasticsearch
Realtime Process
Druid pac4j based Security extension
Cardinality/HyperUnique aggregators
Router Process
Moment Sketches for Approximate Quantiles module
Historical Process
Bloom Filter
Indexer Process
Broker
Test Stats Aggregators
Thrift
Basic Security
Timestamp Min/Max aggregators
Protobuf
Graphite Emitter
Apache Avro
Materialized View
Cached Lookup Module
Select
DataSketches Theta Sketch module
Ambari Metrics Emitter
Approximate Histogram aggregators
InfluxDB Line Protocol Parser
S3-compatible
Apache Druid vs Redshift
Indexing Service
Microsoft Azure
Apache Parquet Extension
T-Digest Quantiles Sketch module
DataSketches extension
Ingestion
Data management
Schema design tips
Ingestion
Data formats
Batch ingestion
Hadoop-based
Native batch
Task reference
Troubleshooting FAQ
Stream ingestion
Tranquility
Apache Kafka
Amazon Kinesis
Misc
Papers
Operations
Web console
Getting started with Apache Druid
Misc
reset-cluster tool
Content for build.sbt
insert-segment-to-db tool
pull-deps tool
Deep storage migration
Legacy Management UIs
Metadata Migration
Export Metadata Tool
dump-segment tool
Performance tuning
Segment Size Optimization
Retaining or automatically dropping data
Metrics
High availability
Alerts
Working with different versions of Apache Hadoop
API reference
HTTP compression
Rolling updates
Basic cluster tuning
Security
TLS support
Security overview
Password providers
LDAP auth
User authentication and authorization
Querying
Druid SQL
Query execution
Native queries
Concepts
Multitenancy
Multi-value dimensions
Datasources
Query caching
Context parameters
Joins
Lookups
Native query components
Virtual columns
Filters
Spatial filters
Sorting (topN)
String comparators
Post-aggregations
Aggregations
Expressions
Dimensions
Having filters (groupBy)
Granularities
Sorting and limiting (groupBy)
Native query types
Timeseries
DatasourceMetadata
TopN
Search
Scan
TimeBoundary
SegmentMetadata
GroupBy
Tutorials
Load from Apache Hadoop
Querying data
Deleting data
Transforming input data
Updating existing data
Configuring data retention
Roll-up
Compacting segments
Load from Apache Kafka
Kerberized HDFS deep storage
Writing an ingestion spec
Loading files natively
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