LTAP (Lake Transactional/Analytical Processing)
OLTP, OLAP, HTAP, and now LTAP? I don’t think so.
A new term that popped up at Databricks Data & AI Summit 2026 by Databricks announcement:
Introduced Lake Transactional/Analytical Processing (LTAP), a new data processing architecture that unifies transactions, analytics, streaming, and operational data on a single copy of storage in the lake. With LTAP, enterprises have a single governed foundation to read, reason, and act on, without pipelines, replicas, or the ETL overhead that has defined data infrastructure for decades. Powered by major advances in Lakebase, LTAP provides a new data foundation for the AI application era.
The premise?
You store your data in Postgres but the source of truth is stored in Iceberg/Parquet on S3. [Reddit](You store your data in Postgres but the source of truth is stored in Iceberg/Parquet on S3)
# Architecture
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Monolith vs. Lakehouse (From Postgres with WAL storing changes to object storage - a Change Data Capture approach?) |
Source
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Source and full article of LTAP at From monolith to Lakebase to LTAP: rethinking the database from storage up | Databricks Blog
# Other Opinions
Jack Vanlightly quotes Databricks:
LTAP is the two workloads (OLTP and OLAP) but also two systems (e.g. Postgres and lakehouse/Spark) and some blend of two different storage systems. […] At the time of writing the details on LTAP are scarce, but it seems like LTAP will fall into Shared Tiering.
Also like Jack’s comment on that OLTP and OLAP has different models anyway, as OLTP has 3NF and OLAP usually a Dimensional Model.
To me it’s too close to an the Lakehouse architecture, just with an added real-time engine, Reyden? Or another storage system as Jack writes. I guess it’s more marketing as of now. ClickHouse could or Starlake could be an LTAP by that definition, too.
# Further Reads
- Some more ellaboration from Jack Vanlightly here: Can We Agree on a Storage/Workload Architecture Taxonomy?
- LTAP: what if OLTP and OLAP meet at storage? | ameer’s website, and skeptical around ACID Transactions
- Discussions on Reddit
Origin: Announcement Databricks Data & AI Summit 2026: Databricks Launches LTAP: The First Lake Transactional/Analytical Processing Architecture - Databricks