> ## Documentation Index
> Fetch the complete documentation index at: https://docs.streamnative.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Lakehouse Features Overview

## Feature Matrix

| Feature | Iceberg (SDT) | Delta (SDT) | Iceberg (SBT) | Delta (SBT) |
| - | - | - | - | - |
| Schema Evolution | Supported | Supported | Coming Soon | Coming Soon |
| Partition Key | Configurable | Configurable | Coming Soon | Coming Soon |
| Upsert | Supported | Supported | Coming Soon | Coming Soon |
| Variant Type | Supported (V3) | Supported | Coming Soon | Coming Soon |
| [Data Lineage](/cloud/lakehouse/features/lineage) | Unity Catalog only | Unity Catalog only | -- | -- |
| Streaming Read | -- | -- | Coming Soon | Coming Soon |
| Analytical Query | Supported | Supported | Coming Soon | Coming Soon |

## Supported Cloud Vendors

| Provider | WAL Storage | Lakehouse Table |
| - | - | - |
| AWS S3 | Supported | Supported |
| Google Cloud Storage | Supported | Supported |
| Azure Blob Storage | Supported | Supported |

## Supported Schemas

| Schema Format | Supported |
| - | - |
| Avro | Yes |
| JSON | Yes |
| ProtobufNative (Pulsar) | Yes |
| Protobuf (Kafka) | Yes |

Supported schema registries:

* StreamNative Kafka Schema Registry
* Confluent Schema Registry

## Feature Guides

Each feature has its own detailed guide:

* [Schema Evolution](/cloud/lakehouse/features/schema-evolution) -- How the lakehouse table evolves when the topic schema changes, including Dead Letter Table (DLT) behavior
* [Variant Type](/cloud/lakehouse/features/variant-type) -- Handle semi-structured data with Iceberg / Delta Variant type
* [Partition Key](/cloud/lakehouse/features/iceberg-partition-key) -- Configure table partitioning with Iceberg transforms
* [Upsert](/cloud/lakehouse/features/iceberg-upsert) -- Deduplication and primary key-based updates
* [Persist Extra Metadata](/cloud/lakehouse/features/persist-extra-metadata) -- Persist message-envelope metadata (offset, publish time, properties) as a `__meta` Variant column
* [Persist Key](/cloud/lakehouse/features/persist-key) -- Persist the source message key as a `__key` column
* [Data Lineage](/cloud/lakehouse/features/lineage) -- Trace source topics to their destination tables in Databricks Unity Catalog

## Next Steps

* [Observability](/cloud/lakehouse/lakehouse-observability) -- Monitor lakehouse tables with metrics and Grafana dashboards


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