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bolt
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Announcing jammdb: a simple single-file key/value store
This crate started out as just a way for me to learn how boltdb works, while learning Rust at the same time. But somehow people started finding and using it and seem to like the simple API, so I figured I might as well share it in case someone else finds it useful too. If you want to know more about my motivations and the history of this crate, you can read the release notes on version 0.8.0!
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Polygon: Json Database System designed to run on small servers (as low as 16MB) and still be fast and flexible.
Some example of embeddable database could be genji, badger and boltdb
- Resource for making database from scratch
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Ask HN: Books on designing disk-optimized data structures?
Designing Data Intensive applications- specifically chapter 3 and 4 which deal with strategies and algorithms for storing and encoding data to be stored on disk and their pros and cons.
Once you read that, I'll suggest reading the source of a simple embedded key-value database, I wouldn't bother with RDBMs as they are complex beasts and contain way more than you need. BoltDB is a good project to read the source of https://github.com/boltdb/bolt, the whole thing is <10k lines of code and is a full blown production grade system with ACID semantics so packs a lot in those 10k and isn't just merely a toy.
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GitHub examples of Go that's written really well?
Bolt db and Bolt db's author post to go with it.
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Open Source Databases in Go
https://github.com/boltdb/bolt is a ACID B+ tree key-value store
- A Database for 2022
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Single Dependency Stacks
For a single server, SQLite, or boltdb[0]
I've never had to scale horizontally. I develop in Go and you can get very far along with just vertical scaling (aka beefier hardware).
Therefore I can't give concrete examples of a distributed db-as-a-library.
But all that you need is to extend the functions that fetch data to not just fetch from disk but from "peers" as well. For this to work you need servers (instances) to know about each other, and as you add more they also get added to their peers - sort of like a bittorrent network. I don't think it's difficult to do.
SQLite might not be suited for being distributed (although RQlite[1] claims to have done it).
Making a distributed data storage based on boltdb[0] is probably more feasible.
Whatever the case, there's no reason why a data storage engine can't be a library, even if it's distributed.
[0]: https://github.com/boltdb/bolt
[1]: https://github.com/rqlite/rqlite
- How can I batch events in second intervals?
- Give examples of really cool software made by a single developer?
rqlite
- The lightweight, easy-to-use, distributed relational database built on SQLite
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CursusDB – A new scalable distributed document oriented database
Seems like you could do the same with rqlite [1], since SQLite supports JSON.
[1]: https://rqlite.io
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Rqlite 8.0
rqlite[1] creator here, happy to answer any questions about rqlite, this latest release, and how it works.
[1] https://rqlite.io
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Adding new database engine support
I found simple distributed RQlite https://github.com/rqlite/rqlite based on raft and sqlite. How hard is to add it?
- I'm All-In on Server-Side SQLite
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So, you want to deploy on the edge?
rqlite[1] creator here, happy to answer any questions. rqlite also supports read-only nodes, which can also help with reads at the "edge". It probably wouldn't scale to 100s of nodes, it is an option.
"rqlite supports adding read-only nodes. You can use this feature to add read scalability to the cluster if you need a high volume of reads, or want to distribute copies of the data nearer to clients – but don’t want those nodes counted towards the quorum. These types of nodes are also known as non-voting nodes."
[1] https://rqlite.io/
[2] https://rqlite.io/docs/clustering/read-only-nodes/
- LiteFS Cloud: Distributed SQLite with Managed Backups
- Show HN: Rqlite, distributed DB built on SQLite, now runs on MIPS, RISC, PowerPC
- rqlite v7.19.0: the lightweight distributed relational database built on Go, Raft, and SQLite -- now runs on MIPS, PowerPC, and RISC
- rqlite v7.18: the lightweight distributed database built on Go, Raft, and SQLite -- now with new Unified HTTP endpoint for easy reads and writes
What are some alternatives?
buntdb - BuntDB is an embeddable, in-memory key/value database for Go with custom indexing and geospatial support
dqlite - Embeddable, replicated and fault-tolerant SQL engine.
badger - Fast key-value DB in Go.
litestream - Streaming replication for SQLite.
bbolt - An embedded key/value database for Go.
cockroach - CockroachDB - the open source, cloud-native distributed SQL database.
goleveldb - LevelDB key/value database in Go.
etcd - Distributed reliable key-value store for the most critical data of a distributed system [Moved to: https://github.com/etcd-io/etcd]
go-memdb - Golang in-memory database built on immutable radix trees
TinyGo - Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
InfluxDB - Scalable datastore for metrics, events, and real-time analytics
go-cache - An in-memory key:value store/cache (similar to Memcached) library for Go, suitable for single-machine applications.