LevelDB Alternatives
Similar projects and alternatives to LevelDB
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RocksDB
A library that provides an embeddable, persistent key-value store for fast storage.
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Scout APM
Scout APM: A developer's best friend. Try free for 14-days. Scout APM uses tracing logic that ties bottlenecks to source code so you know the exact line of code causing performance issues and can get back to building a great product faster.
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CouchDB
Seamless multi-master syncing database with an intuitive HTTP/JSON API, designed for reliability
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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.
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LMDB
Read-only mirror of official repo on openldap.org. Issues and pull requests here are ignored. Use OpenLDAP ITS for issues.
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minikeyvalue
A distributed key value store in under 1000 lines. Used in production at comma.ai
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openpilot
openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 100 supported car makes and models.
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alasql
AlaSQL.js - JavaScript SQL database for browser and Node.js. Handles both traditional relational tables and nested JSON data (NoSQL). Export, store, and import data from localStorage, IndexedDB, or Excel.
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Reviews and mentions
- Is reading C++ primer back to back enough to understand the source code in LevelDB ?
- Looking for software that can help recover .ldb file types. I dont think testdisk can do it.
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How to set up an Electrum Server on Windows machine?
Here you go: https://github.com/spesmilo/electrumx/ You'll need python 3.7 or later, and LevelDB https://github.com/google/leveldb Both available for Windows so it should work fine :)
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Squeezing More Performance Out Of The Linux Kernel With Clang + LTO
looking at https://github.com/google/leveldb it seems that leveldb will do a lot of disk i/o, which is something that involves the kernel. this appears to point towards some kind of LTO optimization maybe in the filesystem driver, or the actual passing around of the data to be written... something like that.
- Binary Trees are optimal except when they’re not
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Looking for recommendations for a single flat-file document database that integrates with Python.
What about leveldb? Its a key-value store that has some python bindings as well. Might be something if you were gonna go with Mongo.
- What Every Programmer Should Know About SSDs
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Hosting SQLite databases on GitHub Pages (or any static file hoster)
If you just do an occasional key/value lookup, you don't need 1.2 MiB of WebAssembly. [1]
I'd solve it via sharding: divide the database into N pieces via range- or mod-sharding. [1] Choose an N that's large enough for each piece to be reasonably small. When you look up a key, fetch the shard of interest.
You can put each piece into separate files (a little simpler to code, and most static servers will use pre-gzipped files for "Content-Encoding: gzip requests" easily, but you waste more disk space due to internal fragmentation) or one file (with range serving and an index of the byte range offset for each piece).
The format for each piece can be anything, eg json (simple) or an sstable-like format (more efficient). [3]
[1] Content-Length of https://phiresky.github.io/youtube-sponsorship-stats/sql-was...
[2] mod-sharding means: piece[i] has all the keys where hash(key) % N = i.
[3] https://github.com/google/leveldb/blob/master/doc/table_form...
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What is a LSM Tree 🪵?
Born off of that, came LevelDB (2011) by the same authors which uses LSM Tree as its underlying data structure. This gave rise to pluggable storage engines and embedded databases. Around the same time in 2007, Amazon came up with DynamoDB which uses the same underlying LSM Tree structure along with a masterless distributed database design.
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A distributed key value store in under 1000 lines
To avoid some confusion, this is only the "distributed" part. The actual store is handled by the https://github.com/google/leveldb library.
Stats
google/leveldb is an open source project licensed under BSD 3-clause "New" or "Revised" License which is an OSI approved license.
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