mm0
sled
mm0 | sled | |
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5 | 37 | |
293 | 7,758 | |
- | - | |
5.7 | 1.8 | |
about 1 month ago | 18 days ago | |
Rust | Rust | |
Creative Commons Zero v1.0 Universal | Apache License 2.0 |
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mm0
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Is Something Bugging You?
Along similar lines, Mario Carneiro wrote a formalisation of a subset of x86 in MetaMath Zero (https://github.com/digama0/mm0/blob/master/examples/x86.mm0) with the ultimate goal of proving that the MetaMath Zero verifier itself is sound. https://arxiv.org/pdf/1910.10703.pdf
(And of course Permutation City is a fiction book all about emulating computers with sound properties!)
- reconnecting with the math world after retirement
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Is it possible to make concrete progress on the alignment problem using an abstract theory of formal control of computer systems? Any help or advice would be really appreciated.
For the first part I have no idea but for the second part I feel like one workable approach is formal control of computer systems. For instance we have a lot of formal mathematical systems (metamath, lean, coq, isabelle etc) and there are attempts to model computer architectures in these systems (there's a cambridge group working on a formalised version of the ARM architecture, and I know Mario Carneiro is working on MM0 which I think has formalised x86) which is all cool.
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Category theory is a universal modeling language
Perhaps look into Metamath Zero / mm0 which.. well I'll just quote from the project [1]:
> Metamath Zero is a language for writing specifications and proofs. Its emphasis is on balancing simplicity of verification and human readability of the specification. That is, it should be easy to see what exactly is the meaning of a proven theorem, but at the same time the language is as pared down as possible to minimize the number of complications in potential verifiers.
> The goal of this project is to build a formally verified (in MM0) verifier for MM0, down to the hardware, to build a strong trust base on which to build verifiers.
[1]: https://github.com/digama0/mm0
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The State of State Machines
IMO an interesting project in this space is: mm0 / MetaMath Zero - Closing the loop in proof verification down to verifying the machine code of the verifier. Goes from first-order logic to peano arithmetic to a model of x86 to a model of the verifier written in x86. Interestingly, it demonstrates that verification of a compact proof can be performed in linear time (!) if the proof is structured correctly. -- https://github.com/digama0/mm0
The fact that proof checking can take linear time (though not proof-finding), and the fact that it incorporates so many 'layers' has emboldened my opinion that such a thing as I described above is possible and has a enormous potential.
sled
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SableDb – a key/value store that uses RocksDB and Redis API (written in Rust)
a few times, seems interesting. The author's also built a lot of other cool concurrency primitives for Rust as well.
[0] https://github.com/spacejam/sled
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Is Something Bugging You?
- Dropbox [3] uses a similar approach but they talk about it a bit more abstractly.
Sans-IO is more documented in Python [4], but str0m [5] and quinn-proto [6] are the best examples in Rust I’m aware of. Note that sans-IO is orthogonal to deterministic test frameworks, but it composes well with them.
With the disclaimer that my opinions are mine and mine alone, and don’t reflect the company I work at —— I do work at a rust shop that has utilized these techniques on some projects.
TigerBeetle is an amazing example and I’ve looked at it before! They are really the best example of this approach outside of FoundationDB I think.
[0]: https://risingwave.com/blog/deterministic-simulation-a-new-e...
[1]: https://risingwave.com/blog/applying-deterministic-simulatio...
[2]: https://dropbox.tech/infrastructure/-testing-our-new-sync-en...
[3]: https://github.com/spacejam/sled
[4]: https://fractalideas.com/blog/sans-io-when-rubber-meets-road...
[5]: https://github.com/algesten/str0m
[6]: https://docs.rs/quinn-proto/0.10.6/quinn_proto/struct.Connec...
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RFC: redb (embedded key-value store) nearing version 1.0
Sled uses bw-tree actually https://github.com/spacejam/sled/wiki/sled-architectural-outlook
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Production grade databases in Rust
There is a valid argument to be made for threads over async in a large percentage of use cases where async is considered the default. If this is what you are referring to however, I don't think they ever referred to async as completely useless: https://github.com/spacejam/sled/issues/1123.
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Best local database that works on all platforms including web?
Have you looked into other pure-Rust databases as well, such as sled or GlueSQL which has an SQL interface on top of sled? I wonder how those would compare to Persy.
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Are there any embedded databases that have multiple-process support?
I'm not sure what you need. Are these of any use? https://github.com/meilisearch/heed https://github.com/spacejam/sled
- Some key-value storage engines in Rust
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Are there a demand for management system of embedded storage like RocksDB? I plan to build one in Rust as the language becoming a core of many popular databases but wonder if there’s a demand. Can’t find any similar project even in other languages.
There is also Sled but as I understand it that is being reworked to use the author's new DB core Marble
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GreptimeDB: a new open source database designed for large-scale time-series data storage and processing, written in rust
There are some databases like sled/FlashDB designed to be embedded to other applications even bare metal microcontrollers. But I do doubt the potential bussiness value of a pure embedded database.
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Ask HN: Serverless” key value store with transactions?
https://github.com/spacejam/sled
To add transaction support, you probably need a good understanding of how the memtable works in Log Structured Merge trees:
What are some alternatives?
RocksDB - A library that provides an embeddable, persistent key-value store for fast storage.
rust-rocksdb - rust wrapper for rocksdb
redis-rs - Redis library for rust
sqlx - 🧰 The Rust SQL Toolkit. An async, pure Rust SQL crate featuring compile-time checked queries without a DSL. Supports PostgreSQL, MySQL, and SQLite.
mini-redis - Incomplete Redis client and server implementation using Tokio - for learning purposes only
heed - A fully typed LMDB wrapper with minimum overhead 🐦
tokio - A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
KeyDB - A Multithreaded Fork of Redis
lmdb-rs - Rust bindings for LMDB
redb - An embedded key-value database in pure Rust
sqlparser-rs - Extensible SQL Lexer and Parser for Rust
rayon - Rayon: A data parallelism library for Rust