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OpenSearch 3.0 Released

opensearch.org

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Re: OpenSearch 3.0 Released

#2

Post by simple10 »

Just learning about OpenSearch. Looks like it's a fork of Elasticsearch from 2021 when Elasticsearch changed licensing model. https://github.com/opensearch-project/OpenSearch

Anyone know if it's still a drop in replacement for Elasticsearch? And how does it compare on performance and features?

Re: OpenSearch 3.0 Released

#3

Post by __s »

simple10 wrote: post #2

Just learning about OpenSearch. Looks like it's a fork of Elasticsearch from 2021 when Elasticsearch changed licensing model. https://github.com/opensearch-project/OpenSearch Anyone know if it's still a drop in replacement for Elasticsearch? And how does it compare on performance and features?

It is not a drop in replacement (but almost is)

1.x is compatible with ES 7.10

Re: OpenSearch 3.0 Released

#5

Post by lockhead »

simple10 wrote: post #2

Just learning about OpenSearch. Looks like it's a fork of Elasticsearch from 2021 when Elasticsearch changed licensing model. https://github.com/opensearch-project/OpenSearch Anyone know if it's still a drop in replacement for Elasticsearch? And how does it compare on performance and features?

It's slower on same hardware, but fine, stay away if you need the UI, the Kibana Fork is hellish slow and riddled with bugs.

Re: OpenSearch 3.0 Released

#6

Post by aabhay »

Does anyone use OpenSearch for its knn and vector capabilities? Is it any good? It’s always hard to know with systems like this whether it works at scale until your team is fighting fires.

Re: OpenSearch 3.0 Released

#7

Post by Y-bar »

simple10 wrote: post #2

Just learning about OpenSearch. Looks like it's a fork of Elasticsearch from 2021 when Elasticsearch changed licensing model. https://github.com/opensearch-project/OpenSearch Anyone know if it's still a drop in replacement for Elasticsearch? And how does it compare on performance and features?

It's worth noting that in September 2024 Elasticsearch once again returned to a fully open source license (A GPLv3).

Re: OpenSearch 3.0 Released

#8

Post by darkamaul »

lockhead wrote: post #5
simple10 wrote: post #2

Just learning about OpenSearch. Looks like it's a fork of Elasticsearch from 2021 when Elasticsearch changed licensing model. https://github.com/opensearch-project/OpenSearch Anyone know if it's still a drop in replacement for Elasticsearch? And how does it compare on performance and features?

It's slower on same hardware, but fine, stay away if you need the UI, the Kibana Fork is hellish slow and riddled with bugs.

It’s slightly more complex that this. Both OpenSearch and Elasticsearch have workflows where they excel.

My company did a fairly comprehensive benchmark of the two products [0] if you are interested in comparing performances.

[0] https://blog.trailofbits.com/2025/03/06/benchmarking-opensea...

Re: OpenSearch 3.0 Released

#10

Post by alex_duf »

aabhay wrote: post #6

Does anyone use OpenSearch for its knn and vector capabilities? Is it any good? It’s always hard to know with systems like this whether it works at scale until your team is fighting fires.

It works with some caveats. I've seen it handle searches with millions of documents no problem, but the KNN search requires to load the entirety of the embedding graph in memory. So watch your RAM consumption.

The quality of your results will depend mostly on the quality of your embeddings

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