LiteDB vs Redis: What are the differences?

<LiteDB vs Redis>

1. **Data Model**: LiteDB uses a document-based data model, storing data in collections similar to JSON documents, while Redis utilizes a key-value data model where every piece of data is stored as a key-value pair.
2. **Persistence**: LiteDB persists data on disk by default, providing durability and consistency, whereas Redis is primarily an in-memory data store with optional persistence mechanisms like snapshots or append-only files.
3. **Query Language**: LiteDB supports a SQL-like query language for querying data, making it easier to retrieve specific information, whereas Redis doesn't have a traditional query language but instead offers various commands for manipulating data.
4. **Scaling**: LiteDB is more suitable for single-server applications or small-scale projects due to its file-based storage engine, while Redis is designed for distributed systems and can scale horizontally by adding more nodes to the cluster.
5. **Data Structures**: Redis provides a wide range of built-in data structures like lists, sets, and sorted sets, enabling advanced data manipulation, whereas LiteDB focuses on simple key-document storage without complex data structures.
6. **Concurrency Control**: LiteDB utilizes a single-writer lock with multiple-reader support, making it suitable for applications with low concurrency requirements, whereas Redis implements optimistic locking and supports high levels of concurrent operations.

In Summary, LiteDB and Redis differ significantly in their data models, persistence mechanisms, query languages, scalability, data structures, and concurrency control strategies.