- Elasticsearch Guide: other versions:
- Getting Started
- Set up Elasticsearch
- Installing Elasticsearch
- Configuring Elasticsearch
- Important Elasticsearch configuration
- Important System Configuration
- Bootstrap Checks
- Heap size check
- File descriptor check
- Memory lock check
- Maximum number of threads check
- Maximum size virtual memory check
- Max file size check
- Maximum map count check
- Client JVM check
- Use serial collector check
- System call filter check
- OnError and OnOutOfMemoryError checks
- Early-access check
- G1GC check
- All permission check
- Stopping Elasticsearch
- Upgrade Elasticsearch
- Set up X-Pack
- Breaking changes
- Breaking changes in 6.0
- Aggregations changes
- Analysis changes
- Cat API changes
- Clients changes
- Cluster changes
- Document API changes
- Geo changes
- Indices changes
- Ingest changes
- Java API changes
- Mapping changes
- Packaging changes
- Percolator changes
- Plugins changes
- Reindex changes
- REST changes
- Scripting changes
- Search and Query DSL changes
- Settings changes
- Stats and info changes
- Breaking changes in 6.1
- Breaking changes in 6.2
- Breaking changes in 6.0
- X-Pack Breaking Changes
- API Conventions
- Document APIs
- Search APIs
- Aggregations
- Metrics Aggregations
- Avg Aggregation
- Cardinality Aggregation
- Extended Stats Aggregation
- Geo Bounds Aggregation
- Geo Centroid Aggregation
- Max Aggregation
- Min Aggregation
- Percentiles Aggregation
- Percentile Ranks Aggregation
- Scripted Metric Aggregation
- Stats Aggregation
- Sum Aggregation
- Top Hits Aggregation
- Value Count Aggregation
- Bucket Aggregations
- Adjacency Matrix Aggregation
- Children Aggregation
- Composite Aggregation
- Date Histogram Aggregation
- Date Range Aggregation
- Diversified Sampler Aggregation
- Filter Aggregation
- Filters Aggregation
- Geo Distance Aggregation
- GeoHash grid Aggregation
- Global Aggregation
- Histogram Aggregation
- IP Range Aggregation
- Missing Aggregation
- Nested Aggregation
- Range Aggregation
- Reverse nested Aggregation
- Sampler Aggregation
- Significant Terms Aggregation
- Significant Text Aggregation
- Terms Aggregation
- Pipeline Aggregations
- Avg Bucket Aggregation
- Derivative Aggregation
- Max Bucket Aggregation
- Min Bucket Aggregation
- Sum Bucket Aggregation
- Stats Bucket Aggregation
- Extended Stats Bucket Aggregation
- Percentiles Bucket Aggregation
- Moving Average Aggregation
- Cumulative Sum Aggregation
- Bucket Script Aggregation
- Bucket Selector Aggregation
- Bucket Sort Aggregation
- Serial Differencing Aggregation
- Matrix Aggregations
- Caching heavy aggregations
- Returning only aggregation results
- Aggregation Metadata
- Returning the type of the aggregation
- Metrics Aggregations
- Indices APIs
- Create Index
- Delete Index
- Get Index
- Indices Exists
- Open / Close Index API
- Shrink Index
- Split Index
- Rollover Index
- Put Mapping
- Get Mapping
- Get Field Mapping
- Types Exists
- Index Aliases
- Update Indices Settings
- Get Settings
- Analyze
- Index Templates
- Indices Stats
- Indices Segments
- Indices Recovery
- Indices Shard Stores
- Clear Cache
- Flush
- Refresh
- Force Merge
- cat APIs
- Cluster APIs
- Query DSL
- Mapping
- Analysis
- Anatomy of an analyzer
- Testing analyzers
- Analyzers
- Normalizers
- Tokenizers
- Standard Tokenizer
- Letter Tokenizer
- Lowercase Tokenizer
- Whitespace Tokenizer
- UAX URL Email Tokenizer
- Classic Tokenizer
- Thai Tokenizer
- NGram Tokenizer
- Edge NGram Tokenizer
- Keyword Tokenizer
- Pattern Tokenizer
- Simple Pattern Tokenizer
- Simple Pattern Split Tokenizer
- Path Hierarchy Tokenizer
- Path Hierarchy Tokenizer Examples
- Token Filters
- Standard Token Filter
- ASCII Folding Token Filter
- Flatten Graph Token Filter
- Length Token Filter
- Lowercase Token Filter
- Uppercase Token Filter
- NGram Token Filter
- Edge NGram Token Filter
- Porter Stem Token Filter
- Shingle Token Filter
- Stop Token Filter
- Word Delimiter Token Filter
- Word Delimiter Graph Token Filter
- Stemmer Token Filter
- Stemmer Override Token Filter
- Keyword Marker Token Filter
- Keyword Repeat Token Filter
- KStem Token Filter
- Snowball Token Filter
- Phonetic Token Filter
- Synonym Token Filter
- Synonym Graph Token Filter
- Compound Word Token Filters
- Reverse Token Filter
- Elision Token Filter
- Truncate Token Filter
- Unique Token Filter
- Pattern Capture Token Filter
- Pattern Replace Token Filter
- Trim Token Filter
- Limit Token Count Token Filter
- Hunspell Token Filter
- Common Grams Token Filter
- Normalization Token Filter
- CJK Width Token Filter
- CJK Bigram Token Filter
- Delimited Payload Token Filter
- Keep Words Token Filter
- Keep Types Token Filter
- Classic Token Filter
- Apostrophe Token Filter
- Decimal Digit Token Filter
- Fingerprint Token Filter
- Minhash Token Filter
- Character Filters
- Modules
- Index Modules
- Ingest Node
- Pipeline Definition
- Ingest APIs
- Accessing Data in Pipelines
- Handling Failures in Pipelines
- Processors
- Append Processor
- Convert Processor
- Date Processor
- Date Index Name Processor
- Fail Processor
- Foreach Processor
- Grok Processor
- Gsub Processor
- Join Processor
- JSON Processor
- KV Processor
- Lowercase Processor
- Remove Processor
- Rename Processor
- Script Processor
- Set Processor
- Split Processor
- Sort Processor
- Trim Processor
- Uppercase Processor
- Dot Expander Processor
- URL Decode Processor
- Monitoring Elasticsearch
- X-Pack APIs
- Info API
- Explore API
- Licensing APIs
- Migration APIs
- Machine Learning APIs
- Add Events to Calendar
- Add Jobs to Calendar
- Close Jobs
- Create Calendar
- Create Datafeeds
- Create Jobs
- Delete Calendar
- Delete Datafeeds
- Delete Events from Calendar
- Delete Jobs
- Delete Jobs from Calendar
- Delete Model Snapshots
- Flush Jobs
- Forecast Jobs
- Get Calendars
- Get Buckets
- Get Overall Buckets
- Get Categories
- Get Datafeeds
- Get Datafeed Statistics
- Get Influencers
- Get Jobs
- Get Job Statistics
- Get Model Snapshots
- Get Scheduled Events
- Get Records
- Open Jobs
- Post Data to Jobs
- Preview Datafeeds
- Revert Model Snapshots
- Start Datafeeds
- Stop Datafeeds
- Update Datafeeds
- Update Jobs
- Update Model Snapshots
- Security APIs
- Watcher APIs
- Definitions
- X-Pack Commands
- How To
- Testing
- Glossary of terms
- Elasticsearch Release Notes
- Elasticsearch version 6.2.4
- Elasticsearch version 6.2.3
- Elasticsearch version 6.2.2
- Elasticsearch version 6.2.1
- Elasticsearch version 6.2.0
- Elasticsearch version 6.1.4
- Elasticsearch version 6.1.3
- Elasticsearch version 6.1.2
- Elasticsearch version 6.1.1
- Elasticsearch version 6.1.0
- Elasticsearch version 6.0.1
- Elasticsearch version 6.0.0
- Elasticsearch version 6.0.0-rc2
- Elasticsearch version 6.0.0-rc1
- Elasticsearch version 6.0.0-beta2
- Elasticsearch version 6.0.0-beta1
- Elasticsearch version 6.0.0-alpha2
- Elasticsearch version 6.0.0-alpha1
- Elasticsearch version 6.0.0-alpha1 (Changes previously released in 5.x)
- X-Pack Release Notes
- Elasticsearch X-Pack version 6.2.4
- Elasticsearch X-Pack version 6.2.3
- Elasticsearch X-Pack version 6.2.2
- Elasticsearch X-Pack version 6.2.1
- Elasticsearch X-Pack version 6.2.0
- Elasticsearch X-Pack version 6.1.4
- Elasticsearch X-Pack version 6.1.3
- Elasticsearch X-Pack version 6.1.2
- Elasticsearch X-Pack version 6.1.1
- Elasticsearch X-Pack version 6.1.0
- Elasticsearch X-Pack version 6.0.1
- Elasticsearch X-Pack version 6.0.0
- Elasticsearch X-Pack version 6.0.0-rc2
- Elasticsearch X-Pack version 6.0.0-rc1
- Elasticsearch X-Pack version 6.0.0-beta2
- Elasticsearch X-Pack version 6.0.0-beta1
- Elasticsearch X-Pack version 6.0.0-alpha2
- Elasticsearch X-Pack version 6.0.0-alpha1
WARNING: Version 6.2 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
- Machine Learning
-
- Added the ability to identify scheduled events and prevent anomaly detection during these periods. For more information, see Calendars and Scheduled Events.
- Security
-
- X-Pack security now supports user authentication using SAML Single Sign on. For more information, see SAML Authentication.
- Watcher
-
- Added a transform input for chained input. For more information, see Transforming Chained Input Data.
- Machine Learning
-
- Increased tokenization flexibility for categorization. Now all Elasticsearch analyzer functionality is available, which opens up the possibility of sensibly categorizing non-English log messages. For more information, see Customizing the Categorization Analyzer.
- Improved the sensitivity of the analysis to high variance data with lots of values near zero.
- Improved the decay rate of the model memory by using a weighted moving average.
-
Machine learning indices created after upgrading to 6.2 have the
auto_expand_replicas: 0-1
setting rather than a fixed setting of 1 replica. As a result, machine learning indices created after upgrading to 6.2 can have a green status on single node clusters. There is no impact in multi-node clusters. - Changed the credentials that are used by datafeeds. When X-Pack security is enabled, a datafeed stores the roles of the user who created or updated the datafeed at that time. This means that if those roles are updated, the datafeed subsequently runs with the new permissions that are associated with the roles. However, if the user’s roles are adjusted after creating or updating the datafeed then the datafeed continues to run with the permissions that are associated with the original roles. For more information, see Datafeeds.
-
Added a new
scheduled
forecast status, which indicates that the forecast has not started yet.
- Monitoring
-
-
X-Pack monitoring indices (
.monitoring
) created after upgrading to 6.2 have theauto_expand_replicas: 0-1
setting rather than a fixed setting of 1 replica. As a result, monitoring indices created after upgrading to 6.2 can have a green status on single node clusters. There is no impact in multi-node clusters. - Added a cluster alert that triggers whenever a node is added, removed, or restarted.
-
X-Pack monitoring indices (
- Security
-
- Added the ability to refresh tokens that were created by the token API. The API provides information about a refresh token, which you can use within 24 hours of its creation to extend the life of a token. For more information, see Token Management APIs.
-
Added principal and role information to
access_granted
,access_denied
,run_as_granted
, andrun_as_denied
audit events. For more information about these events, see Auditing Security Events. - Added audit event ignore policies, which are a way to tune the verbosity of an audit trail. These policies define rules for ignoring audit events that match specific attribute values. For more information, see Logfile Audit Events Ignore Policies.
- Added a certificates API, which enables you to retrieve information about the X.509 certificates that are used to encrypt communications in your Elasticsearch cluster. For more information, see SSL Certificate API.
- Watcher
-
-
Added the ability to set the
index
anddoc_type
dynamically in an index action. For more information, see Index Action. -
Added a
refresh
index action attribute, which enables you to set the refresh policy of the write request. For more information, see Index Action. - Added support for actions in slack attachments, which enables you to add buttons that can be clicked in slack messages. For more information, see Slack Action.
-
Watcher indices (
.watch*
andtriggered_watches
) created after upgrading to 6.2 have theauto_expand_replicas: 0-1
setting rather than a fixed setting of 1 replica. As a result, Watcher indices created after upgrading to 6.2 can have a green status on single node clusters. There is no impact in multi-node clusters.
-
Added the ability to set the
- Machine Learning
-
- Improved error reporting for crashes and resource problems on Linux.
- Improved the detection of seasonal trends in bucket spans longer than 1 hour.
- Updated the forecast API to wait for validation and return an error if the validation fails.
- Set the actual bucket value to 0 in model plots for empty buckets for count and sum functions. The count and sum functions treat empty buckets as 0 rather than unknown for anomaly detection, so it was inconsistent not to do the same for model plots. This inconsistency resulted in problems plotting these buckets in Kibana.
- Security
-
-
Updated the
setup-passwords
command to generate passwords with charactersA-Z
,a-z
, and0-9
, so that they are safe to use in shell scripts. For more information about this command, see setup-passwords. -
Improved the error messages that occur if the
x-pack
directory is missing when you runusers
commands. - Fixed the ordering of realms in a realm chain, which determines the order in which the realms are consulted. For more information, see How Authentication Works.
-
Updated the
- Watcher
-
- Replaced group settings with affix key settings where filters are needed. For more information, see https://github.com/elastic/elasticsearch/pull/28338.
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