IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

Elasticsearch Guide

Elasticsearch Guide: other versions:
What is Elasticsearch?
- Data in: documents and indices
- Information out: search and analyze
- Scalability and resilience
What’s new in 8.8
Set up Elasticsearch
- Installing Elasticsearch
- Run Elasticsearch locally
- Configuring Elasticsearch
- Important system configuration
- Bootstrap Checks
- Bootstrap Checks for X-Pack
- Starting Elasticsearch
- Stopping Elasticsearch
- Discovery and cluster formation
- Add and remove nodes in your cluster
- Full-cluster restart and rolling restart
- Remote clusters
- Plugins
Upgrade Elasticsearch
- Archived settings
- Reading indices from older Elasticsearch versions
Index modules
- Analysis
- Index Shard Allocation
- Index blocks
- Mapper
- Merge
- Similarity module
- Slow Log
- Store
  - Preloading data into the file system cache
- Translog
- History retention
- Index Sorting
  - Use index sorting to speed up conjunctions
- Indexing pressure
Mapping
- Dynamic mapping
  - Dynamic field mapping
  - Dynamic templates
- Explicit mapping
- Runtime fields
- Field data types
  - Aggregate metric
  - Alias
  - Arrays
  - Binary
  - Boolean
  - Completion
  - Date
  - Date nanoseconds
  - Dense vector
  - Flattened
  - Geopoint
  - Geoshape
  - Histogram
  - IP
  - Join
  - Keyword
  - Nested
  - Numeric
  - Object
  - Percolator
  - Point
  - Range
  - Rank feature
  - Rank features
  - Search-as-you-type
  - Shape
  - Text
  - Token count
  - Unsigned long
  - Version
- Metadata fields
- Mapping parameters
- Mapping limit settings
- Removal of mapping types
Text analysis
- Overview
- Concepts
- Configure text analysis
- Built-in analyzer reference
  - Fingerprint
  - Keyword
  - Language
  - Pattern
  - Simple
  - Standard
  - Stop
  - Whitespace
- Tokenizer reference
  - Character group
  - Classic
  - Edge n-gram
  - Keyword
  - Letter
  - Lowercase
  - N-gram
  - Path hierarchy
  - Pattern
  - Simple pattern
  - Simple pattern split
  - Standard
  - Thai
  - UAX URL email
  - Whitespace
- Token filter reference
- Character filters reference
- Normalizers
Index templates
- Simulate multi-component templates
- Config ignore_missing_component_templates
  - Usage example
Data streams
- Set up a data stream
- Use a data stream
- Modify a data stream
- Time series data stream (TSDS)
Ingest pipelines
- Example: Parse logs
- Enrich your data
- Processor reference
  - Append
  - Attachment
  - Bytes
  - Circle
  - Community ID
  - Convert
  - CSV
  - Date
  - Date index name
  - Dissect
  - Dot expander
  - Drop
  - Enrich
  - Fail
  - Fingerprint
  - Foreach
  - Geo-grid
  - GeoIP
  - Grok
  - Gsub
  - HTML strip
  - Inference
  - Join
  - JSON
  - KV
  - Lowercase
  - Network direction
  - Pipeline
  - Redact
  - Registered domain
  - Remove
  - Rename
  - Reroute
  - Script
  - Set
  - Set security user
  - Sort
  - Split
  - Trim
  - Uppercase
  - URL decode
  - URI parts
  - User agent
Aliases
Search your data
- Collapse search results
- Filter search results
- Highlighting
- Long-running searches
- Near real-time search
- Paginate search results
- Retrieve inner hits
- Retrieve selected fields
- Search across clusters
- Search multiple data streams and indices
- Search shard routing
- Search templates
- Sort search results
- kNN search
- Semantic search with ELSER
Query DSL
- Query and filter context
- Compound queries
- Full text queries
- Geo queries
- Shape queries
  - Shape
- Joining queries
  - Nested
  - Has child
  - Has parent
  - Parent ID
- Match all
- Span queries
- Specialized queries
- Term-level queries
  - Exists
  - Fuzzy
  - IDs
  - Prefix
  - Range
  - Regexp
  - Term
  - Terms
  - Terms set
  - Wildcard
- Text expansion
- minimum_should_match parameter
- rewrite parameter
- Regular expression syntax
Aggregations
- Bucket aggregations
- Metrics aggregations
  - Avg
  - Boxplot
  - Cardinality
  - Extended stats
  - Geo-bounds
  - Geo-centroid
  - Geo-Line
  - Cartesian-bounds
  - Cartesian-centroid
  - Matrix stats
  - Max
  - Median absolute deviation
  - Min
  - Percentile ranks
  - Percentiles
  - Rate
  - Scripted metric
  - Stats
  - String stats
  - Sum
  - T-test
  - Top hits
  - Top metrics
  - Value count
  - Weighted avg
- Pipeline aggregations
Geospatial analysis
EQL
- Syntax reference
- Function reference
- Pipe reference
- Example: Detect threats with EQL
SQL
- Overview
- Getting Started with SQL
- Conventions and Terminology
  - Mapping concepts across SQL and Elasticsearch
- Security
- SQL REST API
- SQL Translate API
- SQL CLI
- SQL JDBC
  - API usage
- SQL ODBC
  - Driver installation
  - Configuration
- SQL Client Applications
- SQL Language
- Functions and Operators
- Reserved keywords
- SQL Limitations
Scripting
- Painless scripting language
- How to write scripts
- Access fields in a document
- Common scripting use cases
  - Field extraction
- Accessing document fields and special variables
- Scripting and security
- Lucene expressions language
- Advanced scripts using script engines
Data management
- ILM: Manage the index lifecycle
- Tutorial: Customize built-in policies
- Tutorial: Automate rollover
- Index management in Kibana
- Overview
- Concepts
- Index lifecycle actions
  - Allocate
  - Delete
  - Force merge
  - Migrate
  - Read only
  - Rollover
  - Downsample
  - Searchable snapshot
  - Set priority
  - Shrink
  - Unfollow
  - Wait for snapshot
- Configure a lifecycle policy
- Migrate index allocation filters to node roles
- Troubleshooting index lifecycle management errors
- Start and stop index lifecycle management
- Manage existing indices
- Skip rollover
- Restore a managed data stream or index
- Data tiers
Autoscaling
- Autoscaling deciders
Monitor a cluster
- Overview
- How it works
- Monitoring in a production environment
- Collecting monitoring data with Elastic Agent
- Collecting monitoring data with Metricbeat
- Collecting log data with Filebeat
- Configuring data streams/indices for monitoring
- Legacy collection methods
Roll up or transform your data
- Rolling up historical data
- Transforming data
Set up a cluster for high availability
- Designing for resilience
  - Resilience in small clusters
  - Resilience in larger clusters
- Cross-cluster replication
Snapshot and restore
- Register a repository
- Create a snapshot
- Restore a snapshot
- Searchable snapshots
Secure the Elastic Stack
- Elasticsearch security principles
- Start the Elastic Stack with security enabled automatically
- Manually configure security
- Updating node security certificates
  - With the same CA
  - With a different CA
- User authentication
- User authorization
- Enable audit logging
- Restricting connections with IP filtering
- Securing clients and integrations
- Operator privileges
- Troubleshooting
- Limitations
Watcher
- Getting started with Watcher
- How Watcher works
- Encrypting sensitive data in Watcher
- Inputs
- Triggers
  - Schedule trigger
- Conditions
- Actions
- Transforms
- Managing watches
- Example watches
  - Watching the status of an Elasticsearch cluster
- Limitations
Command line tools
- elasticsearch-certgen
- elasticsearch-certutil
- elasticsearch-create-enrollment-token
- elasticsearch-croneval
- elasticsearch-keystore
- elasticsearch-node
- elasticsearch-reconfigure-node
- elasticsearch-reset-password
- elasticsearch-saml-metadata
- elasticsearch-service-tokens
- elasticsearch-setup-passwords
- elasticsearch-shard
- elasticsearch-syskeygen
- elasticsearch-users
How to
- General recommendations
- Recipes
- Tune for indexing speed
- Tune for search speed
- Tune approximate kNN search
- Tune for disk usage
- Size your shards
- Use Elasticsearch for time series data
Troubleshooting
- Fix common cluster issues
  - Watermark errors
  - Circuit breaker errors
  - High CPU usage
  - High JVM memory pressure
  - Red or yellow cluster status
  - Rejected requests
  - Task queue backlog
  - Mapping explosion
  - Hot spotting
- Diagnose unassigned shards
- Add a missing tier to the system
- Allow Elasticsearch to allocate the data in the system
- Allow Elasticsearch to allocate the index
- Indices mix index allocation filters with data tiers node roles to move through data tiers
- Not enough nodes to allocate all shard replicas
- Total number of shards for an index on a single node exceeded
- Total number of shards per node has been reached
- Troubleshooting corruption
- Fix data nodes out of disk
  - Increase the disk capacity of data nodes
  - Decrease the disk usage of data nodes
- Fix master nodes out of disk
- Fix other role nodes out of disk
- Start index lifecycle management
- Start Snapshot Lifecycle Management
- Restore from snapshot
- Multiple deployments writing to the same snapshot repository
- Addressing repeated snapshot policy failures
- Troubleshooting discovery
- Troubleshooting monitoring
- Troubleshooting transforms
- Troubleshooting Watcher
- Troubleshooting searches
- Troubleshooting shards capacity health issues
REST APIs
- API conventions
- Common options
- REST API compatibility
- Autoscaling APIs
  - Create or update autoscaling policy
  - Get autoscaling capacity
  - Delete autoscaling policy
  - Get autoscaling policy
- Behavioral Analytics APIs
  - Put Analytics Collection
  - Delete Analytics Collection
  - List Analytics Collections
  - Post Analytics Collection Event
- Compact and aligned text (CAT) APIs
  - cat aliases
  - cat allocation
  - cat anomaly detectors
  - cat component templates
  - cat count
  - cat data frame analytics
  - cat datafeeds
  - cat fielddata
  - cat health
  - cat indices
  - cat master
  - cat nodeattrs
  - cat nodes
  - cat pending tasks
  - cat plugins
  - cat recovery
  - cat repositories
  - cat segments
  - cat shards
  - cat snapshots
  - cat task management
  - cat templates
  - cat thread pool
  - cat trained model
  - cat transforms
- Cluster APIs
  - Cluster allocation explain
  - Cluster get settings
  - Cluster health
  - Health
  - Cluster reroute
  - Cluster state
  - Cluster stats
  - Cluster update settings
  - Nodes feature usage
  - Nodes hot threads
  - Nodes info
  - Prevalidate node removal
  - Nodes reload secure settings
  - Nodes stats
  - Pending cluster tasks
  - Remote cluster info
  - Task management
  - Voting configuration exclusions
  - Create or update desired nodes
  - Get desired nodes
  - Delete desired nodes
  - Get desired balance
  - Delete/reset desired balance
- Cross-cluster replication APIs
  - Get CCR stats
  - Create follower
  - Pause follower
  - Resume follower
  - Unfollow
  - Forget follower
  - Get follower stats
  - Get follower info
  - Create auto-follow pattern
  - Delete auto-follow pattern
  - Get auto-follow pattern
  - Pause auto-follow pattern
  - Resume auto-follow pattern
- Data stream APIs
  - Create data stream
  - Delete data stream
  - Get data stream
  - Migrate to data stream
  - Data stream stats
  - Promote data stream
  - Modify data streams
  - Downsample
- Document APIs
  - Reading and Writing documents
  - Index
  - Get
  - Delete
  - Delete by query
  - Update
  - Update by query
  - Multi get
  - Bulk
  - Reindex
  - Term vectors
  - Multi term vectors
  - ?refresh
  - Optimistic concurrency control
- Enrich APIs
  - Create enrich policy
  - Delete enrich policy
  - Get enrich policy
  - Execute enrich policy
  - Enrich stats
- EQL APIs
  - Delete async EQL search
  - EQL search
  - Get async EQL search
  - Get async EQL search status
- Features APIs
  - Get features
  - Reset features
- Fleet APIs
  - Get global checkpoints
  - Fleet search
  - Fleet search
- Find structure API
- Graph explore API
- Index APIs
  - Alias exists
  - Aliases
  - Analyze
  - Analyze index disk usage
  - Clear cache
  - Clone index
  - Close index
  - Create index
  - Create or update alias
  - Create or update component template
  - Create or update index template
  - Create or update index template (legacy)
  - Delete component template
  - Delete dangling index
  - Delete alias
  - Delete index
  - Delete index template
  - Delete index template (legacy)
  - Exists
  - Field usage stats
  - Flush
  - Force merge
  - Get alias
  - Get component template
  - Get field mapping
  - Get index
  - Get index settings
  - Get index template
  - Get index template (legacy)
  - Get mapping
  - Import dangling index
  - Index recovery
  - Index segments
  - Index shard stores
  - Index stats
  - Index template exists (legacy)
  - List dangling indices
  - Open index
  - Refresh
  - Resolve index
  - Rollover
  - Shrink index
  - Simulate index
  - Simulate template
  - Split index
  - Unfreeze index
  - Update index settings
  - Update mapping
- Index lifecycle management APIs
  - Create or update lifecycle policy
  - Get policy
  - Delete policy
  - Move to step
  - Remove policy
  - Retry policy
  - Get index lifecycle management status
  - Explain lifecycle
  - Start index lifecycle management
  - Stop index lifecycle management
  - Migrate indices, ILM policies, and legacy, composable and component templates to data tiers routing
- Ingest APIs
  - Create or update pipeline
  - Delete pipeline
  - GeoIP stats
  - Get pipeline
  - Simulate pipeline
- Info API
- Licensing APIs
  - Delete license
  - Get license
  - Get trial status
  - Start trial
  - Get basic status
  - Start basic
  - Update license
- Logstash APIs
  - Create or update Logstash pipeline
  - Delete Logstash pipeline
  - Get Logstash pipeline
- Machine learning APIs
  - Get machine learning info
  - Get machine learning memory stats
  - Set upgrade mode
- Machine learning anomaly detection APIs
  - Add events to calendar
  - Add jobs to calendar
  - Close jobs
  - Create jobs
  - Create calendars
  - Create datafeeds
  - Create filters
  - Delete calendars
  - Delete datafeeds
  - Delete events from calendar
  - Delete filters
  - Delete forecasts
  - Delete jobs
  - Delete jobs from calendar
  - Delete model snapshots
  - Delete expired data
  - Estimate model memory
  - Flush jobs
  - Forecast jobs
  - Get buckets
  - Get calendars
  - Get categories
  - Get datafeeds
  - Get datafeed statistics
  - Get influencers
  - Get jobs
  - Get job statistics
  - Get model snapshots
  - Get model snapshot upgrade statistics
  - Get overall buckets
  - Get scheduled events
  - Get filters
  - Get records
  - Open jobs
  - Post data to jobs
  - Preview datafeeds
  - Reset jobs
  - Revert model snapshots
  - Start datafeeds
  - Stop datafeeds
  - Update datafeeds
  - Update filters
  - Update jobs
  - Update model snapshots
  - Upgrade model snapshots
- Machine learning data frame analytics APIs
  - Create data frame analytics jobs
  - Delete data frame analytics jobs
  - Evaluate data frame analytics
  - Explain data frame analytics
  - Get data frame analytics jobs
  - Get data frame analytics jobs stats
  - Preview data frame analytics
  - Start data frame analytics jobs
  - Stop data frame analytics jobs
  - Update data frame analytics jobs
- Machine learning trained model APIs
  - Clear trained model deployment cache
  - Create or update trained model aliases
  - Create part of a trained model
  - Create trained models
  - Create trained model vocabulary
  - Delete trained model aliases
  - Delete trained models
  - Get trained models
  - Get trained models stats
  - Infer trained model
  - Start trained model deployment
  - Stop trained model deployment
  - Update trained model deployment
- Migration APIs
  - Deprecation info
  - Feature migration
- Node lifecycle APIs
  - Put shutdown API
  - Get shutdown API
  - Delete shutdown API
- Reload search analyzers API
- Repositories metering APIs
  - Get repositories metering information
  - Clear repositories metering archive
- Rollup APIs
  - Create rollup jobs
  - Delete rollup jobs
  - Get job
  - Get rollup caps
  - Get rollup index caps
  - Rollup search
  - Start rollup jobs
  - Stop rollup jobs
- Script APIs
  - Create or update stored script
  - Delete stored script
  - Get script contexts
  - Get script languages
  - Get stored script
- Search APIs
  - Search
  - Async search
  - Point in time
  - kNN search
  - Reciprocal rank fusion
  - Scroll
  - Clear scroll
  - Search template
  - Multi search template
  - Render search template
  - Search shards
  - Suggesters
  - Multi search
  - Count
  - Validate
  - Terms enum
  - Explain
  - Profile
  - Field capabilities
  - Ranking evaluation
  - Vector tile search
- Search Application APIs
  - Put Search Application
  - Get Search Application
  - List Search Applications
  - Delete Search Application
  - Search Application Search
- Searchable snapshots APIs
  - Mount snapshot
  - Cache stats
  - Searchable snapshot statistics
  - Clear cache
- Security APIs
  - Authenticate
  - Change passwords
  - Clear cache
  - Clear roles cache
  - Clear privileges cache
  - Clear API key cache
  - Clear service account token caches
  - Create API keys
  - Create or update application privileges
  - Create or update role mappings
  - Create or update roles
  - Create or update users
  - Create service account tokens
  - Delegate PKI authentication
  - Delete application privileges
  - Delete role mappings
  - Delete roles
  - Delete service account token
  - Delete users
  - Disable users
  - Enable users
  - Enroll Kibana
  - Enroll node
  - Get API key information
  - Get application privileges
  - Get builtin privileges
  - Get role mappings
  - Get roles
  - Get service accounts
  - Get service account credentials
  - Get token
  - Get user privileges
  - Get users
  - Grant API keys
  - Has privileges
  - Invalidate API key
  - Invalidate token
  - OpenID Connect prepare authentication
  - OpenID Connect authenticate
  - OpenID Connect logout
  - Query API key information
  - Update API key
  - Bulk update API keys
  - SAML prepare authentication
  - SAML authenticate
  - SAML logout
  - SAML invalidate
  - SAML complete logout
  - SAML service provider metadata
  - SSL certificate
  - Activate user profile
  - Disable user profile
  - Enable user profile
  - Get user profiles
  - Suggest user profile
  - Update user profile data
  - Has privileges user profile
- Snapshot and restore APIs
  - Create or update snapshot repository
  - Verify snapshot repository
  - Repository analysis
  - Get snapshot repository
  - Delete snapshot repository
  - Clean up snapshot repository
  - Clone snapshot
  - Create snapshot
  - Get snapshot
  - Get snapshot status
  - Restore snapshot
  - Delete snapshot
- Snapshot lifecycle management APIs
  - Create or update policy
  - Get policy
  - Delete policy
  - Execute snapshot lifecycle policy
  - Execute snapshot retention policy
  - Get snapshot lifecycle management status
  - Get snapshot lifecycle stats
  - Start snapshot lifecycle management
  - Stop snapshot lifecycle management
- SQL APIs
  - Clear SQL cursor
  - Delete async SQL search
  - Get async SQL search
  - Get async SQL search status
  - SQL search
  - SQL translate
- Transform APIs
  - Create transform
  - Delete transform
  - Get transforms
  - Get transform statistics
  - Preview transform
  - Reset transform
  - Schedule now transform
  - Start transform
  - Stop transforms
  - Update transform
  - Upgrade transforms
- Usage API
- Watcher APIs
  - Ack watch
  - Activate watch
  - Deactivate watch
  - Delete watch
  - Execute watch
  - Get watch
  - Get Watcher stats
  - Query watches
  - Create or update watch
  - Update Watcher settings
  - Get Watcher settings
  - Start watch service
  - Stop watch service
- Definitions
  - Role mapping resources
- Data Lifecycle Management APIs
  - Put Data Stream Lifecycle
  - Get Data Stream Lifecycle
  - Delete Data Stream Lifecycle
  - Explain Data Lifecycle
Migration guide
- 8.8
- 8.7
- 8.6
- 8.5
- 8.4
- 8.3
- 8.2
- 8.1
- 8.0
  - Java time migration guide
  - Transient settings migration guide
Release notes
- Elasticsearch version 8.8.2
- Elasticsearch version 8.8.1
- Elasticsearch version 8.8.0
- Elasticsearch version 8.7.1
- Elasticsearch version 8.7.0
- Elasticsearch version 8.6.2
- Elasticsearch version 8.6.1
- Elasticsearch version 8.6.0
- Elasticsearch version 8.5.3
- Elasticsearch version 8.5.2
- Elasticsearch version 8.5.1
- Elasticsearch version 8.5.0
- Elasticsearch version 8.4.3
- Elasticsearch version 8.4.2
- Elasticsearch version 8.4.1
- Elasticsearch version 8.4.0
- Elasticsearch version 8.3.3
- Elasticsearch version 8.3.2
- Elasticsearch version 8.3.1
- Elasticsearch version 8.3.0
- Elasticsearch version 8.2.3
- Elasticsearch version 8.2.2
- Elasticsearch version 8.2.1
- Elasticsearch version 8.2.0
- Elasticsearch version 8.1.3
- Elasticsearch version 8.1.2
- Elasticsearch version 8.1.1
- Elasticsearch version 8.1.0
- Elasticsearch version 8.0.1
- Elasticsearch version 8.0.0
- Elasticsearch version 8.0.0-rc2
- Elasticsearch version 8.0.0-rc1
- Elasticsearch version 8.0.0-beta1
- Elasticsearch version 8.0.0-alpha2
- Elasticsearch version 8.0.0-alpha1
Dependencies and versions

Search and analyze your data

Elasticsearch is the search and analytics engine that powers the Elastic Stack.

Introduction What's new Release notes

Get to know Elasticsearch

Install, manage, and secure

Ingest data

Search and analyze

Search your data
Query data with the Query DSL, EQL, or SQL
Aggregations
Geospatial analysis
Machine Learning
Alerting

Elasticsearch Guide

Search and analyze your data

Get to know Elasticsearch

Install, manage, and secure

Ingest data

Search and analyze

Data management

APIs and developer docs

Explore by use case

Search my data

Observe my data

Protect my environment