Revisions

Apache Solr migration support

You can now migrate from Apache Solr 6, 7, 8, and 9 to Amazon OpenSearch Service or Amazon OpenSearch Serverless NextGen. This expands beyond Elasticsearch migration support. Coverage includes bulk data backfill from Solr snapshots, including multi-shard collections, and SolrCloud capture and replay for supported JSON-format traffic through the Solr transform providers.

May 15, 2026

9× memory reduction for large migrations

Reindex-from-Snapshot (RFS) now streams index data to disk instead of holding it in RAM. Migrations of indexes with 100 GB+ shards now complete reliably without requiring oversized infrastructure.

May 15, 2026

Zero-downtime change data capture (CDC) pipelines on Amazon EKS

Continuous data sync from source to target runs on a configurable schedule (down to 6-hour cycles). This feature supports Elasticsearch 5.x through 8.x with TLS, and Amazon OpenSearch Serverless NextGen. You can keep source and target in sync during the migration window. You can validate the target on production traffic and cut over with confidence.

May 15, 2026

Kubernetes-native workflow orchestration

Migrations run as managed Argo Workflows on Amazon EKS with automatic retries on transient failures, workflow reset and workflow show commands, pre-flight validation, TLS by default, and resilient three-broker Apache Kafka. You can recover from transient failures without manual intervention.

May 15, 2026

Secure-by-default networking

The capture proxy defaults to TLS using cert-manager-issued self-signed certificates. Frontend mTLS (client-certificate) authentication is supported. Plaintext proxy traffic is no longer the default; opt out per proxy with tls.mode: plaintext only when you intentionally want HTTP. TLS no longer requires opt-in configuration.

May 15, 2026

Source reconstruction for indexes with _source disabled

If your source cluster stored indexes without the _source field, Migration Assistant now reconstructs the source documents during migration. This unblocks you if you relied on the _source disabled optimization in Elasticsearch.

May 15, 2026

Migration Assistant 3.0 documentation refresh

Aligned implementation guide with the latest Migration Assistant 3.0 documentation. Source matrix updated to include Elasticsearch 1.x–2.x (backfill-only), Apache Solr 6.x–9.x, and Amazon OpenSearch Serverless NextGen targets. Added self-contained Amazon EKS deployment instructions, Workflow CLI guide, and expanded troubleshooting coverage. Consolidated external references into implementation guide.Architecture refreshed with control-plane and data-plane framing.

May 15, 2026

Migration Assistant 3.0

Amazon EKS deployment is now the recommended deployment option. ECS deployment reached end of support July 15, 2026. Added Apache Solr 8.x as a supported source. Added Workflow CLI for declarative migration configuration, built-in approval gates, and interactive monitoring TUI.

April 2026