JormunDB
A high-performance, DynamoDB-compatible database server written in Odin, backed by RocksDB.
DynamoDB-Compatible Database · Powered by RocksDB + Odin
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## What is JormunDB?
JormunDB (formerly ZynamoDB) is a Self-Hosted DynamoDB replacement that speaks the DynamoDB wire protocol. Point your AWS SDK or CLI at it and use it as a drop-in replacement.
**Why Odin?** The original Zig implementation suffered from explicit allocator threading—every function taking an `allocator` parameter, every allocation needing `errdefer` cleanup. Odin's implicit context allocator system eliminates this ceremony: one `context.allocator = arena_allocator` at the request handler entry and everything downstream just works.
## Features
- ✅ **DynamoDB Wire Protocol**: Works with AWS SDKs and CLI out of the box
- ✅ **Binary Storage**: Efficient TLV encoding for items, varint-prefixed keys
- ✅ **Arena-per-Request**: Zero explicit memory management in business logic
- ✅ **Table Operations**: CreateTable, DeleteTable, DescribeTable, ListTables
- ✅ **Item Operations**: PutItem, GetItem, DeleteItem
- ✅ **Query & Scan**: With pagination support (Limit, ExclusiveStartKey)
- ✅ **Expression Parsing**: KeyConditionExpression for Query operations
- ✅ **Persistent Storage**: RocksDB-backed with full ACID guarantees
- ✅ **Concurrency**: Table-level RW locks for safe concurrent access