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

# Databricks

> Access our blockchain data through secure Databricks Delta Sharing.

export const chainCount = '85+';

Allium offers secure access to historical blockchain data via [Databricks Delta Sharing](https://docs.databricks.com/data-sharing/index.html), allowing you to query our data directly in your own Databricks environment.

## What is Delta Sharing?

Delta Sharing is an open protocol that enables secure, realtime data sharing across different platforms and organizations without data duplication.

<Frame caption="Databricks Delta Sharing overview">
  <img src="https://mintcdn.com/allium-e770e2b7/M3SuvBIUs-0g-3vo/images/image-databrick-1.avif?fit=max&auto=format&n=M3SuvBIUs-0g-3vo&q=85&s=c2b62e25bd3d5a520fcb331f9a172cf1" alt="Delta Sharing architecture diagram" width="1377" height="355" data-path="images/image-databrick-1.avif" />
</Frame>

## Data Freshness

<Tabs>
  <Tab title="Batch Data">
    Data freshness for batch processing is typically within **2-3 hours**.
  </Tab>

  <Tab title="Realtime Data">
    Databricks also supports streaming capabilities, achieving **sub-minute latency** for realtime data.

    <Frame caption="End-to-end query latency for Ethereum decoded logs on Databricks">
      <img src="https://mintcdn.com/allium-e770e2b7/M3SuvBIUs-0g-3vo/images/image-databrick-2.png?fit=max&auto=format&n=M3SuvBIUs-0g-3vo&q=85&s=3f0adc7eeb727cd940978e4ee49e0cca" alt="Latency performance chart" width="1255" height="506" data-path="images/image-databrick-2.png" />
    </Frame>
  </Tab>
</Tabs>

## Supported Blockchains and Schemas

Our historical batch data is currently hosted on Databricks with comprehensive blockchain coverage.

<Card title={`[Explorer / Datashares] Blockchains (${chainCount})`} icon="database" href="/historical-data/supported-blockchains" horizontal />

## Getting Started

<Info>
  **Recommended Region**

  We strongly recommend using a Databricks workspace located in AWS **us-east-2** (Ohio) for optimal performance. However, we can set up Delta Share for other regions upon request.
</Info>

<Frame>
  <img src="https://mintcdn.com/allium-e770e2b7/M3SuvBIUs-0g-3vo/images/image-databrick-3.webp?fit=max&auto=format&n=M3SuvBIUs-0g-3vo&q=85&s=c1c94b98a426860a4d30f1ff46a14a2d" alt="Databricks workspace setup" width="1848" height="1716" data-path="images/image-databrick-3.webp" />
</Frame>

<Note>
  Ready to get started? [Contact us](https://www.allium.so/contact) to set up
  your Databricks Delta Share.
</Note>