landing_page/qdrant-landing/content/documentation/migrate-to-qdrant/from-opensearch.md

title, short_description, description, weight, partition

title	short_description	description	weight	partition
From OpenSearch	Migrate OpenSearch k-NN indexes into Qdrant collections to consolidate vector workloads on a dedicated engine.	Migrate from OpenSearch to Qdrant by streaming k-NN indexes, vectors, and document payloads into Qdrant collections with the Qdrant Migration Tool's connector.	25	ecosystem

Migrate from OpenSearch to Qdrant

What You Need from OpenSearch

• OpenSearch URL — the HTTP endpoint
• Index name — the index containing your vectors
• Credentials — username/password or API key

Concept Mapping

OpenSearch	Qdrant	Notes
Index	Collection	One-to-one mapping
Document	Point	Each document becomes a point
knn_vector field	Vector	Mapped automatically
Document fields	Payload	Non-vector fields become payload
cosinesimil	Cosine	Direct mapping
l2	Euclid	Direct mapping
innerproduct	Dot	Direct mapping

Run the Migration

docker run --net=host --rm -it registry.cloud.qdrant.io/library/qdrant-migration opensearch \
    --opensearch.url 'https://your-opensearch-host:9200' \
    --opensearch.index 'your-index' \
    --opensearch.username 'admin' \
    --opensearch.password 'your-password' \
    --qdrant.url 'https://your-instance.cloud.qdrant.io:6334' \
    --qdrant.api-key 'your-qdrant-api-key' \
    --qdrant.collection 'your-collection'

Using API Key Authentication

docker run --net=host --rm -it registry.cloud.qdrant.io/library/qdrant-migration opensearch \
    --opensearch.url 'https://your-opensearch-host:9200' \
    --opensearch.index 'your-index' \
    --opensearch.api-key 'your-opensearch-api-key' \
    --qdrant.url 'https://your-instance.cloud.qdrant.io:6334' \
    --qdrant.api-key 'your-qdrant-api-key' \
    --qdrant.collection 'your-collection'

All OpenSearch-Specific Flags

Flag	Required	Description
--opensearch.url	Yes	OpenSearch HTTP endpoint
--opensearch.index	Yes	Index to migrate
--opensearch.username	No	Username for basic auth
--opensearch.password	No	Password for basic auth
--opensearch.api-key	No	API key for authentication
--opensearch.insecure-skip-verify	No	Skip TLS certificate verification

Qdrant-Side Options

Flag	Default	Description
--qdrant.id-field	__id__	Payload field name for original OpenSearch document IDs

Gotchas

• OpenSearch vs. Elasticsearch: OpenSearch is a fork of Elasticsearch, so many of the same considerations apply. However, the CLI subcommand is opensearch, not elasticsearch.
• Score normalization: OpenSearch _score values are not directly comparable to Qdrant scores. Use rank-based metrics when verifying your migration.
• Nested documents: OpenSearch nested documents need to be flattened or restructured for Qdrant's payload model.

Next Steps

After migration, verify your data arrived correctly with the Migration Verification Guide.