ADR-003: Blob Storage as MVP Checkpoint Store

Status

Accepted

Context

The checkpoint/lease store must be easy to provision in an Azure environment and have low operational overhead.

Decision

The default checkpoint/lease store for the MVP is Azure Blob Storage.

Rationale

• Works naturally with Azure Functions
• Already present in most environments
• JSON blob inspection is straightforward
• Cost and simplicity are appropriate

Drawbacks

• No advanced query/search capabilities
• Custom logic required if lease primitives are not used directly
• Table Storage or Cosmos DB may be more suitable for large-scale multi-poller scenarios

Follow-up

Consider adding Table/Cosmos store support in v0.4.