LevelDB
sql.js-httpvfs
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LevelDB | sql.js-httpvfs | |
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27 | 15 | |
34,871 | 3,233 | |
1.2% | - | |
0.0 | 1.5 | |
about 1 month ago | about 1 year ago | |
C++ | TypeScript | |
BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
LevelDB
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Codebases to read
I'm partial to how cleanly written https://github.com/google/leveldb is. It is a reasonable size to fully read & grok in not too long.
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SQLite performance tuning: concurrent reads, multiple GBs and 100k SELECTs/s
Google didnt, thus Chrome started replacing sqlite with https://github.com/google/leveldb
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Is there a lightweight, stable and embedded database library?
leveldb?
- Ask HN: What's the best source code you've read?
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LevelDB VS ZoneTree - a user suggested alternative
2 projects | 22 Aug 2022
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Open Source Databases in Go
goleveldb - Implementation of the LevelDB key/value database in Go.
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Warp: Lightweight Multi-Key Transactions for Key-Value Stores
I don't know of any rule of English grammar that would lead to this interpretation. If you do, you should immediately write to the maintainers of these websites:
https://redis.com/nosql/key-value-databases/
https://www.mongodb.com/databases/key-value-database
https://aws.amazon.com/nosql/key-value/
https://etcd.io/docs/v3.4/learning/why/
https://riak.com/products/riak-kv/
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Leveldb File Forensics
https://github.com/google/leveldb -- successfully compiled the tool. This tool seemed the most promising. I tried using the command:
- Ask HN: What are the best key-value self-hosted storage engines?
sql.js-httpvfs
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A future for SQL on the web (2021)
I couldn't find do these wrappers support read-only SQLite databases with HTTP range requests, like in this famous post [1]. Phiresky's wrapper supports it, but it seems to be rebuilding the whole sql.js [2], I'd rather have it as VFS on top of sqlite.org's own WASM module. I like the idea of HTTP range requests, but I don't want to run a fork, that will be unmaintained in few years.
- Cloud Backed SQLite
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Transmission 4.0.0 beta 1 is out
Oh that’s an interesting idea. I saw someone built SQLite over HTTP with the Range header: https://phiresky.github.io/blog/2021/hosting-sqlite-database...
So presumably in a similar manner as https://github.com/phiresky/sql.js-httpvfs you could map SQLite pages to leaf torrents too and get the chunking you are looking for.
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netgrep - An experimental porting of ripgrep on WASM over the HTTP protocol.
But ripgrep has to read the whole file; if your intended use case is searching a blog, I'd recommend using something which makes an index, so you don't need to download everything. For example, sql.js-httpvfs is SQLite ported to wasm, with the DB file read over HTTP. If you use FTS to make an index, it works astonishingly well for text search.
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Datasette Lite: a server-side Python web application running in a browser
How close is Python SQLite and Datasette Lite to accessing a hosted SQL database using HTTP range requests as can be done in sql.js like https://github.com/phiresky/sql.js-httpvfs?
I put together a Pyodide-based web app where users need a few indexed queries from a 600mb SQLite database but it isn't very practical for them to download the whole thing into the browser.
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Ws4sqlite: Query SQLite via HTTP
You can also access sqlite databases directly from an http server that supports range requests (like s3). There are a bunch of implementations of this in different languages including Go[0] and Javascript[1].
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WebVM: Server-less x86 virtual machines in the browser
Hosting SQLite Databases on GitHub Pages" https://news.ycombinator.com/item?id=28021766 : DuckDB can query [and page] Parquet from GitHub, sql.js-httpvfs, sqltorrent, File System Access API (Chrome only so far; IDK about resource quotas and multi-GB datasets), serverless search with WASM workers
https://github.com/phiresky/sql.js-httpvfs :
> sql.js is a light wrapper around SQLite compiled with EMScripten for use in the browser (client-side).
> This repo is a fork of and wrapper around sql.js to provide a read-only HTTP-Range-request based virtual file system for SQLite. It allows hosting an SQLite database on a static file hoster and querying that database from the browser without fully downloading it.
> The virtual file system is an emscripten filesystem with some "smart" logic to accelerate fetching with virtual read heads that speed up when sequential data is fetched. It could also be useful to other applications, the code is in lazyFile.ts. It might also be useful to implement this lazy fetching as an SQLite VFS [*] since then SQLite could be compiled with e.g. WASI SDK without relying on all the emscripten OS emulation.
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Database-Less Torrent Website
It doesn't have to be range requests, you could split the file instead of depending on the range requests. Essentially it's the same as the chunking instructions for hosters who have a maximum file size as is demonstrated here: https://github.com/phiresky/sql.js-httpvfs/blob/master/creat...
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A web database of all AWS IAM actions
They left the sourcemaps in their build, so one can see the code from the Usage section of sql.js-httpvfs (https://github.com/phiresky/sql.js-httpvfs#usage) copy-pasted into App.tsx, but I didn't find any other identifying text
I'd actually guess it was just a copy-paste of the "sqlite over webworker using wasm" demo, backed by the actual sqlite of the actions https://www.awsiam.info/iam.db
What are some alternatives?
RocksDB - A library that provides an embeddable, persistent key-value store for fast storage.
MongoDB - The MongoDB Database
SQLite - Unofficial git mirror of SQLite sources (see link for build instructions)
Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.
LMDB - Read-only mirror of official repo on openldap.org. Issues and pull requests here are ignored. Use OpenLDAP ITS for issues.
CouchDB - Seamless multi-master syncing database with an intuitive HTTP/JSON API, designed for reliability
SQLite - Official Git mirror of the SQLite source tree
Apache Cassandra - Mirror of Apache Cassandra
libmdbx - One of the fastest embeddable key-value ACID database without WAL. libmdbx surpasses the legendary LMDB in terms of reliability, features and performance.
ClickHouse - ClickHouse® is a free analytics DBMS for big data
Apache HBase - Apache HBase
duckdb - DuckDB is an in-process SQL OLAP Database Management System