Elasticsearch Guide: other versions:
What is Elasticsearch?
- Data in: documents and indices
- Information out: search and analyze
- Scalability and resilience
What’s new in 8.5
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
Data streams
- Set up a data stream
- Use a data stream
- Change mappings and settings for 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
  - GeoIP
  - Grok
  - Gsub
  - HTML strip
  - Inference
  - Join
  - JSON
  - KV
  - Lowercase
  - Network direction
  - Pipeline
  - Registered domain
  - Remove
  - Rename
  - 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
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
- 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
  - 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
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 Metricbeat
- Collecting log data with Filebeat
- Configuring 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
  - Watching event data
- 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
  - Error: disk usage exceeded flood-stage watermark, index has read-only-allow-delete block
  - Circuit breaker errors
  - High CPU usage
  - High JVM memory pressure
  - Red or yellow cluster status
  - Rejected requests
  - Task queue backlog
- 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
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
- Compact and aligned text (CAT) APIs
  - cat aliases
  - cat allocation
  - cat anomaly detectors
  - 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
  - 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
- 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
- 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
  - 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
- 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
  - 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
  - Start watch service
  - Stop watch service
- Definitions
  - Role mapping resources
Migration guide
- 8.5
- 8.4
- 8.3
- 8.2
- 8.1
- 8.0
  - Java time migration guide
  - Transient settings migration guide
Release notes
- Elasticsearch version 8.5.3
- 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

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

« Cross-cluster replication overview _parent field »

› ›

Upgrade API

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Upgrade API

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The _upgrade API is no longer useful and will be removed. For information about upgrading, see Upgrading Elasticsearch.

« Cross-cluster replication overview _parent field »

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