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OpenSearchCon Europe 2026 has ended
16-17 April 2026 | Prague, Czechia 
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Venue: Bohemia 2 clear filter
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Friday, April 17
 

09:00 CEST

Keynote: Bianca Lewis, Executive Director, OpenSearch Software Foundation, The Linux Foundation
Friday April 17, 2026 09:00 - 09:15 CEST

Speakers
avatar for Bianca Lewis

Bianca Lewis

Executive Director, OpenSearch Software Foundation

Friday April 17, 2026 09:00 - 09:15 CEST
Bohemia 2

09:15 CEST

Sponsored Keynote: AI-Driven Deployment and Monitoring Across Federated Cloud-Edge Sites - Giampaolo Conti, AI Engineer & Benedetto Ginestra, Software Engineer, Adeptic Reply
Friday April 17, 2026 09:15 - 09:30 CEST
The IPCEI-CIS program is shaping the next wave of European cloud-edge innovation by enabling secure and sovereign digital infrastructures.
In this context, Adeptic Reply demonstrates how natural language can be transformed into a fully structured deployment request. We built an open AI powered engine capable of structuring requests being able to be executed on federated cloud-edge sites, composed of a mix of direct-managed and third parties’ nodes.
To keep these complex and inter-connected scenarios under control, we developed an observability layer allowing users to track performance deviations across the federated cloud-edge sites, ensuring reliability and transparency in the application lifecycle.

This session illustrates how structured AI workflows and federated observability come together to support the IPCEI-CIS vision and enable seamless, trustworthy deployment across distributed cloud domains.
Speakers
avatar for Benedetto Ginestra

Benedetto Ginestra

Software Engineer, Adeptic Reply
Software Engineer working with modern technologies to build impactfulsystems. His experience includes challenging domains such as personal mobility enhancement, where technology can directly improve people’s independence and quality of life. He currently contributes to the 8ra initiative... Read More →
avatar for Giampaolo Conti

Giampaolo Conti

AI Engineer, Adeptic Reply
ICT Engineer graduated from Politecnico di Torino, with a solid background incomputer engineering and advanced expertise in AI and machine learning. Currently an AI Engineer at Adeptic Reply, contributing to Europe’s digitalsovereignty by developing cutting‑edge AI solutions within... Read More →
Friday April 17, 2026 09:15 - 09:30 CEST
Bohemia 2

09:55 CEST

Partner Roundtable
Friday April 17, 2026 09:55 - 11:05 CEST
The Partner Roundtable is a great way to interact with OpenSearch leadership and have an open dialogue about the project. We will discuss strategy, challenges and opportunities, community and collaboration, future trends, training and enablement, and project growth. And of course, you are encouraged to openly exchange ideas and experiences, ask questions, share your thoughts, and engage in meaningful discussion.

By invitation only.


Friday April 17, 2026 09:55 - 11:05 CEST
Bohemia 2

11:15 CEST

Upcoming Changes for the OpenSearch Index Authorization Mechanisms - Nils Bandener, Eliatra
Friday April 17, 2026 11:15 - 11:55 CEST
The current index authorization model in OpenSearch has a few quirks and weaknesses; these will be mostly noticeable when working in OpenSearch Dashboards or similar applications with users which have only limited access to indices. Thus, if you do not take care and forget to flip certain switches, you will encounter quite a few "Forbidden" errors in OpenSearch Dashboards.
Over the past year, we have been working on a new index authorization concept for OpenSearch. The goal is a more logical and intuitive authorization model that provides a smoother and more predictable user experience.

This new approach is expected to be introduced as an optional feature in an upcoming OpenSearch release and is planned to become the default in OpenSearch 4.

In this talk, we will explain the new authorization concept, highlight its advantages, and provide practical guidance for cluster administrators on how to roll it out safely without causing service interruptions.
Speakers
avatar for Nils Bandener

Nils Bandener

Software Architect, Eliatra
Freelance software architect with long track record in security and infrastructure software. Interested in finding optimal solutions which combine broad functionality with a user-centric view. Track record of many years in security software via collaborations with Search Guard and... Read More →
Friday April 17, 2026 11:15 - 11:55 CEST
Bohemia 2
  Operating OpenSearch
  • Presentation Slides Attached Yes

12:05 CEST

Road To Maintainership: Shaping OpenSearch's Future - Varun Bansal, AWS
Friday April 17, 2026 12:05 - 12:25 CEST
OpenSearch is welcoming but the path from first PR to maintainer can feel opaque. This session provides a practical, step-by-step playbook for contributing to OpenSearch and growing as a trusted maintainer.

Learn where to start (repos, good-first-issue), how to pick right-sized work, set up your environment, align with coding and testing norms, and craft high-signal PRs that are easy to review. We’ll cover collaboration habits—scoping changes, attending triages, avoiding churn, handling async reviews, documenting decisions—and show how to build credibility fast.

We’ll outline the maintainer path: observable signals (consistency, quality reviews, ownership, reliability, judgment), responsibilities (triage, design guidance, merges, releases, community health), and how nominations happen. Leave with a 30/60/90-day plan, a review-friendly PR template, and a roadmap to grow consistent contributions into visible impact.
Speakers
avatar for Varun Bansal

Varun Bansal

Sr. Software Engineer, AWS
Varun Bansal is a Software Engineer at Amazon OpenSearch Service. With 10 years of experience in software development and cloud technologies, he is passionate about developing and improving the OpenSearch Service, helping customers harness the power of open-source search and analytics... Read More →
avatar for Raghuvansh Raj

Raghuvansh Raj

SDE III, Amazon
Friday April 17, 2026 12:05 - 12:25 CEST
Bohemia 2

13:35 CEST

Fine-tuning Neural Sparse Model for Domain Specific Data From an Existing OpenSearch Index - Aswath Srinivasan & Cedric Pelvet, Amazon Web Services
Friday April 17, 2026 13:35 - 14:15 CEST
This is the sequel talk to the earlier OpenSearchCon talk on the topic “Budget Friendly Semantic Search With Neural Sparse Search”. This follow up talk we will explain shortcomings such as 1/ pre-trained lack the domain knowledge 2/ off-the-shelf-domain-specific-sparse-model are either expensive/proprietary or non-existent

Level 300-400 talk covering,
1/ Intro to Neural Sparse Search
2/ Pre-trained model shortcomings
3/ Fine-tuning pre-trained model using open-source tools
4/ Use Search Relevancy Workbench to compare pre-trained and fine-tuned sparse model search results

A recommended pre-requisite is to watch the earlier presentation on “Budget Friendly Semantic Search With Neural Sparse Search” - https://www.youtube.com/watch?v=kx71KFf-Nv0

Of course its a completely “optional” pre-requisite as the previous talk will be condensed to a 5 minute lightning talk and will serve as the introduction

This talk will be demo-heavy, showcasing the fine-tuning possibilities of sparse encoder models using data from an existing OpenSearch index, which also means that the approach is suitable for even for those niche domains for which even proprietary models are not available in the market
Speakers
avatar for Aswath Srinivasan

Aswath Srinivasan

Senior Search Engine Architect, OpenSearch @ AWS
Aswath Srinivasan is a Senior Search Engine Architect at Amazon Web Services currently based in Munich, Germany. With over 18 years of experience in various search technologies, Aswath currently focuses on OpenSearch. He is a search and open-source enthusiast and helps customers and... Read More →
avatar for Cedric Pelvet

Cedric Pelvet

Principal Specialist Solutions Architect, Amazon Web Services
Cédric Pelvet is a Principal Specialist Solutions Architect at AWS, focusing on AI and near-realtime distributed systems for data like OpenSearch, Kafka and Flink.
Friday April 17, 2026 13:35 - 14:15 CEST
Bohemia 2

14:25 CEST

Scaling Welfare With Open Source: How NAV Migrated To Managed OpenSearch - Dmitry Kan, Aiven & Hans Kristian Flaatten, Norwegian Government
Friday April 17, 2026 14:25 - 15:05 CEST
The Norwegian Labor and Welfare Administration (NAV) manages 1/3 of Norway’s state budget. Supporting their "product-first" paradigm for 20,000 employees required a shift from legacy monoliths to a centralized, self-service observability stack. NAV partnered with Aiven to migrate their logging infrastructure to a managed OpenSearch environment. Aiven has been a strategic partner of NAV by hosting some of NAV’s most critical data services for many years. As a founding member of the OpenSearch Foundation with active maintainers, Aiven provided a unique advantage in helping NAV adopt OpenSearch for their application logging.
This technical deep-dive covers:
* Migration Architecture: High-throughput logging from on-premise to a managed service with zero-downtime
* Scalability & Performance: Shard rebalancing, customized scaling, and automated snapshots
* Data Pipeline: 60TB of log data, and OpenTelemetry traces with Data Prepper
* Operational Stability: Self-healing nodes and alert integrations with Slack.
We will cover usage scenarios of OpenSearch dashboards and take a close look at how Aiven delivers and operates OpenSearch as a managed service at Nav’s scale.
Speakers
avatar for Hans Kristian Flaatten

Hans Kristian Flaatten

Platform Engineer, Norwegian Government
CNCF Abassasor, Google Developer Expert (GDE) for Cloud, Grafana Champion and Platform Engineer at the Norwegian Labor and Welfare Administration (NAV) working on NAIS - a platform built to increase development speed by providing the best experience to build, run and operate appl... Read More →
avatar for Dmitry Kan

Dmitry Kan

Product Director, Search, Aiven
Dmitry is a Product Director at Aiven, leading managed OpenSearch service. Since 2010, he has specialized in search (Lucene, Solr, Elasticsearch), previously co-owning TomTom’s planet-scale map search and building the technology behind AlphaSense. At Silo.AI, he led NLP and web-scale... Read More →
Friday April 17, 2026 14:25 - 15:05 CEST
Bohemia 2
  Operating OpenSearch
  • Presentation Slides Attached Yes

15:30 CEST

From Logs To Signals: Rethinking System Monitoring With OpenSearch - Shruti Chaturvedi, Independent
Friday April 17, 2026 15:30 - 15:50 CEST
Most production monitoring follows the same path: metrics fire an alert, engineers search logs for context, and human reasoning becomes the bottleneck. A global p95 alert triggers, and 10–15 minutes later someone realizes the issue is limited to ap-south-1. Metrics and logs are tightly coupled through manual toil.

This session proposes a simple shift: logs detect first.

Structured JSON logs become system signals. These are indexed into purpose-built OpenSearch indexes, where sliding-window aggregation queries continuously evaluate system state. Queries like “p95 latency by region over 5 minutes” yield precise outcomes such as “REGION_OUTAGE: ap-south-1” instead of noisy global alerts.

Through a live demo, we show how explicit log schemas, index mappings, and Query DSL enable context-rich, machine-driven evaluation without dashboards or ad hoc searches. OpenSearch evaluates signals; actions remain external and decoupled.

The result is reduced human toil, a clearer system state, and a practical pattern that complements existing monitoring stacks without overpromising scale.
Speakers
avatar for Shruti Chaturvedi

Shruti Chaturvedi

DevOps Engineer, Independent
Shruti is a Cloud Engineer who builds bridges—from Git to GPU, from microservices to machine learning. A founding engineer turned DevOps specialist, she has architected multi-cloud systems on AWS and GCP, built self-service developer platforms with Terraform and ArgoCD, and instrumented... Read More →
Friday April 17, 2026 15:30 - 15:50 CEST
Bohemia 2
  Analytics + Security + Observability
  • Presentation Slides Attached Yes

16:00 CEST

Caching for Speed: Practical Performance Optimization in OpenSearch & Lucene - Sagar Upadhyaya & Ankit Jain, Amazon Web Services
Friday April 17, 2026 16:00 - 16:40 CEST
Caching is essential for achieving low latency and high throughput in search systems, yet it’s often misunderstood or misused. OpenSearch and Lucene provide multiple caching layers—such as the request cache, field data cache, and Lucene query cache—each designed for different workloads and access patterns.

In this talk, we break down how OpenSearch caches work, when they help, and common pitfalls that lead to low hit rates or wasted memory. We share lessons from real production systems, showing how tuning, architectural choices, and benchmark-driven evaluation improve cache effectiveness, performance, and resiliency.

We then discuss optimizations across key cache layers — the request cache, field data cache, and Lucene query cache — and the impact they have on real workloads.

Finally, we introduce tiered caching, when it makes sense, how it integrates with existing cache layers, and the trade-offs involved.

This session is intended for engineers who want a practical understanding of caching in OpenSearch and Lucene and actionable guidance for improving search performance in production.
Speakers
avatar for Sagar Upadhyaya

Sagar Upadhyaya

Software engineer at AWS Opensearch, Amazon Web Services
Sagar is a Software Engineer working on Amazon OpenSearch Service. He is an active contributor to the OpenSearch Project, primarily focused on search performance and resiliency-related features.
avatar for Ankit Jain

Ankit Jain

Lucene Committer | OpenSearch Maintainer | AWS OpenSearch, Amazon
Ankit Jain is a Software Engineer on the Amazon OpenSearch Service team, leading performance and scalability initiatives for search infrastructure. He is an active maintainer and committer for the Apache Lucene and OpenSearch projects, with hands-on experience operating large-scale... Read More →
Friday April 17, 2026 16:00 - 16:40 CEST
Bohemia 2

16:50 CEST

Keynote: Closing Remarks - Kris Freedain, Senior Community Manager & Patti Juric, Senior Marketing Content Manager, OpenSearch Project
Friday April 17, 2026 16:50 - 17:00 CEST

Speakers
avatar for Kris Freedain

Kris Freedain

Senior Community Manager, OpenSearch Project
Kris Freedain (he/him) is the Senior Community Manager for the OpenSearch Project, OpenSearch Software Foundation, and technical steering committee. He is also an OpenSearch Ambassador. He has decades of experience in tech, but finds connecting people to be the most fulfilling part... Read More →
avatar for Patti Juric

Patti Juric

Senior Marketing Manager, Content & Partner Strategy, OpenSearch Project
Patti Juric is Senior Marketing Content Manager for the OpenSearch Project, where she leads content, events, and partner strategy. She serves on the OpenSearch Software Foundation Marketing Committee and chairs the Program Committee for the Linux Foundation's Observability Summit... Read More →
Friday April 17, 2026 16:50 - 17:00 CEST
Bohemia 2
 
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