Question 1

How does rqlite compare to etcd?

Accepted Answer

rqlite is similar to etcd in providing distributed key-value storage but adds full SQL capabilities via SQLite, making it better for relational data modeling. However, etcd might have better performance for pure key-value operations in high-throughput scenarios.

Question 2

Is rqlite good for high write loads?

Accepted Answer

rqlite may not be ideal for extremely high write loads due to SQLite's single-threaded write model, which can limit concurrent write performance. For write-intensive applications, consider databases optimized for parallel writes, though rqlite's tunable durability can help mitigate this.

Question 3

How to set up a multi-node rqlite cluster?

Accepted Answer

You can set up a multi-node cluster using dynamic clustering via DNS, Kubernetes, Docker Compose, or other service discovery methods. The documentation provides detailed guides for each approach, making it straightforward to deploy and manage.

Question 4

Can rqlite handle JSON queries efficiently?

Accepted Answer

Yes, rqlite supports JSON queries through SQLite's JSON1 extension, allowing you to store and query JSON data directly within SQL statements. This makes it suitable for applications blending relational and semi-structured data.

Question 5

What are the backup options for rqlite?

Accepted Answer

rqlite supports hot backups, including automatic backups to cloud storage like AWS S3, MinIO, and Google Cloud. You can also restore directly from SQLite files or cloud storage, ensuring data durability and easy recovery.

Question 6

How to tune consistency in rqlite?

Accepted Answer

rqlite allows tuning read consistency levels, such as strong or weak consistency, via HTTP API parameters like 'level'. This lets you optimize for performance or data freshness, with documentation detailing the trade-offs for different settings.

Question 7

rqlite vs SQLite: when to use which?

Accepted Answer

Use SQLite for single-node, embedded applications where simplicity and low overhead are key. Choose rqlite when you need distributed replication and high availability on top of SQLite's features, such as for critical data in cloud or edge deployments requiring fault tolerance.

RQLite

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