AWS OpenSearch
Amazon OpenSearch Service is a managed service for search, analytics, and visualization. Forked from Elasticsearch, it powers log analytics, full-text search, and observability.
What is OpenSearch? (Simple Explanation)
Think of OpenSearch like a Google search engine for your own data. Upload documents, logs, or product catalogs, and your users can search through them with sub-second results.
When Would You Use OpenSearch?
- Application search (full-text, faceted, autocomplete)
- Log analytics and observability
- Security information and event management (SIEM)
- Clickstream and user behavior analysis
- Anomaly detection on time-series data
Who Uses OpenSearch?
From startups to enterprises, OpenSearch powers:
What Makes OpenSearch Powerful
OpenSearch Pricing & Free Tier
Athena: $5/TB scanned. Glue: $0.44/DPU-hour. EMR: from $0.048/vCPU-hour. OpenSearch: from ~$0.028/hour.
OpenSearch Best Practices
- 1Use Athena workgroups to separate query history and control costs per team
- 2Enable Glue Data Catalog encryption and resource-level IAM policies
- 3Use partition projection in Athena instead of MSCK REPAIR TABLE for faster queries
- 4Set query result location to an S3 bucket with lifecycle expiration (7 days)
- 5Monitor with CloudWatch — set alarms on query scan volume to avoid cost surprises
Getting Started with OpenSearch in 5 Minutes
- 1Open the AWS Console and navigate to OpenSearch
- 2Click "Create" or "Get started" to begin configuration
- 3Configure the required settings — name, region, and access permissions
- 4Review and create — monitor the initial status in CloudWatch
OpenSearch CLI Quick Reference
2 production-ready commands. Full CLI Library (225+ services) →
aws opensearch list-domain-names --query 'DomainNames[*].DomainName' --output tableList all OpenSearch domainsaws opensearch describe-domain --domain-name my-domain --query 'DomainStatus.{Endpoint:Endpoint,Version:EngineVersion,Volume:EBSOptions.VolumeSize}'View domain endpoint, version, and storage sizePros & Cons of OpenSearch
Pros
- OpenSearch Dashboards for visualization
- SQL and Piped Processing Language (PPL) support
- UltraWarm and cold storage tiers for cost optimization
- Anomaly detection with machine learning
- Alerting and notifications integration
Cons
- ✕Per-TB pricing (Athena) penalizes ad-hoc exploration of large datasets
- ✕Real-time analytics can get expensive — Kinesis shard costs scale linearly
- ✕Cold start latency on serverless analytics (Athena, EMR Serverless) may not suit sub-second dashboards
OpenSearch vs Alternatives
OpenSearch vs Kinesis
Choose OpenSearch for Application search (full-text, faceted, autocomplete) and Log analytics and observability. It excels at opensearch dashboards for visualization.
Choose Kinesis as an alternative when your requirements differ. Each service in the Analytics category serves different architectural patterns.
Services That Work with OpenSearch
OpenSearch is rarely used alone. It is typically combined with:
Compliance & Security
How AWS OpenSearch fits into major compliance standards. Browse all 41 frameworks →
OpenSearch configuration is audited by CIS Benchmarks v1.5–v3.0 for secure cloud defaults.
NIST 800-53OpenSearch access controls, encryption, and audit logging map to NIST 800-53 AC, SC, and AU control families.
PCI DSS 4.0OpenSearch encryption, access control, and logging support PCI DSS for cardholder data environments.
SOC 2OpenSearch security, availability, and confidentiality controls evaluated under SOC 2 Trust Services Criteria.
ISO 27001OpenSearch configuration and monitoring controls map to ISO 27001 Annex A information security management.
Frequently Asked Questions About OpenSearch
What is AWS OpenSearch?
Amazon OpenSearch Service is a managed service for search, analytics, and visualization. Forked from Elasticsearch, it powers log analytics, full-text search, and observability.
What is OpenSearch used for?
OpenSearch is commonly used for: Application search (full-text, faceted, autocomplete); Log analytics and observability; Security information and event management (SIEM); Clickstream and user behavior analysis; Anomaly detection on time-series data. It's a core service in the analytics category of AWS.
Is OpenSearch free?
Athena: $5/TB scanned. Glue: $0.44/DPU-hour. EMR: from $0.048/vCPU-hour. OpenSearch: from ~$0.028/hour.
What are the key features of OpenSearch?
OpenSearch's most important capabilities include: OpenSearch Dashboards for visualization. SQL and Piped Processing Language (PPL) support. UltraWarm and cold storage tiers for cost optimization. Anomaly detection with machine learning. Alerting and notifications integration. Each of these is designed to help teams application search (full-text, faceted, autocomplete).
How does OpenSearch compare to alternatives?
OpenSearch competes with both AWS-native alternatives (Kinesis, S3, CloudWatch) and third-party equivalents. The right choice depends on your specific requirements for scalability, cost, and operational overhead. See the comparisons section below for detailed guidance.
Which compliance frameworks apply to OpenSearch?
CIS AWS v3.0: OpenSearch configuration is audited by CIS Benchmarks v1.5–v3.0 for secure cloud defaults. NIST 800-53: OpenSearch access controls, encryption, and audit logging map to NIST 800-53 AC, SC, and AU control families. PCI DSS 4.0: OpenSearch encryption, access control, and logging support PCI DSS for cardholder data environments. SOC 2: OpenSearch security, availability, and confidentiality controls evaluated under SOC 2 Trust Services Criteria. ISO 27001: OpenSearch configuration and monitoring controls map to ISO 27001 Annex A information security management.
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