Amazon OpenSearch – Consider Latest Generation i-Family Instances

Amazon OpenSearch service users can significantly reduce infrastructure costs by strategically upgrading to the latest generation i-family instances. Switching from i2 to i3 instances offers improved performance and substantial cost savings.

Why This Policy Matters

Upgrading OpenSearch instances is crucial for:

• Cost Optimization: Achieve up to 58% cost reduction

• Performance Enhancement: Gain 4x higher I/O performance

• Infrastructure Efficiency: Leverage more advanced hardware technologies

• Detailed Cost and Performance Analysis

• Performance Comparison: i2 vs i3 Instances

• Instance TypeMemoryvCPUsMonthly CostPerformance Boost i2.2xlarge.search122 GiB16$1,743Baselinei3.2xlarge.search122 GiB16$7294x I/O Performance

Key Highlights:

58% cost reduction

2x higher disk throughput

Equivalent computational resources

Implementation Guide

Infrastructure as Code Example (Terraform)

Before (Inefficient Configuration)

resource "aws_elasticsearch_domain" "example" {
  domain_name = "legacy-search"
 
  cluster_config {
    instance_type = "i2.2xlarge.search"
  }
}

resource "aws_elasticsearch_domain" "example" {
  domain_name = "legacy-search"
 
  cluster_config {
    instance_type = "i2.2xlarge.search"
  }
}

resource "aws_elasticsearch_domain" "example" {
  domain_name = "legacy-search"
 
  cluster_config {
    instance_type = "i2.2xlarge.search"
  }
}

After (Optimized Configuration)

resource "aws_elasticsearch_domain" "example" {
  domain_name = "modern-search"
 
  cluster_config {
    instance_type = "i3.2xlarge.search"
  }
}

resource "aws_elasticsearch_domain" "example" {
  domain_name = "modern-search"
 
  cluster_config {
    instance_type = "i3.2xlarge.search"
  }
}

resource "aws_elasticsearch_domain" "example" {
  domain_name = "modern-search"
 
  cluster_config {
    instance_type = "i3.2xlarge.search"
  }
}

Manual Migration Steps

• Assess current OpenSearch cluster configuration

• Validate workload compatibility with i3 instances

• Create a migration plan

• Perform a staged rollout

• Monitor performance and cost metrics

Best Practices

• Gradual Migration: Implement changes in phases

• Performance Testing: Validate workload compatibility

• Cost Tracking: Monitor actual savings post-migration

Tools for Implementation

Recommended Tools:

Infracost: Automatically detect and estimate savings for OpenSearch instance upgrades

AWS Cost Explorer

AWS Migration Hub

Real-World Scenarios

• Scenario 1: E-commerce Search Platform

• Before: Running multiple i2.2xlarge.search instances

After: Migrated to i3.2xlarge.search

• Result: 50% infrastructure cost reduction, improved search response times

• Scenario 2: Log Analytics Infrastructure

• Initial State: Legacy i2 instances with high operational costs

• Transformation: Comprehensive i3 instance upgrade

• Outcome: Enhanced performance, significant cost savings

Considerations and Caveats

Potential Challenges:

• Temporary service disruption during migration

• Compatibility requirements with existing workloads

Data migration complexity

Not Recommended When:

• Workloads have specific performance dependencies

• Migration costs outweigh potential savings

• Strict compliance requirements limit upgrades

Frequently Asked Questions (FAQs)

How long does an OpenSearch instance migration typically take?
Migration duration varies but typically ranges from 2-6 hours, depending on cluster size and complexity.

Are there any data loss risks during migration?
When following AWS best practices, risks are minimal. Always perform comprehensive backups before migration.

Can Infracost help identify potential OpenSearch cost optimizations?
Yes, Infracost’s free trial includes automated detection of OpenSearch instance optimization opportunities.

What if my specific workload doesn’t benefit from I3 instances?
Conduct thorough performance testing and consult AWS documentation for workload-specific recommendations.

How often should I review instance generation upgrades?
Recommended review cycle is every 12-18 months to ensure optimal performance and cost efficiency.