https://github.com/verement/lmdb-simple

Simple Haskell API for LMDB
https://github.com/verement/lmdb-simple

database haskell-api haskell-library lmdb

Last synced: about 2 months ago
JSON representation

Simple Haskell API for LMDB

• Host: GitHub
• URL: https://github.com/verement/lmdb-simple
• Owner: verement
• License: bsd-3-clause
• Created: 2017-07-30T03:04:59.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-06-17T21:43:02.000Z (over 5 years ago)
• Last Synced: 2024-04-25T03:22:29.851Z (9 months ago)
• Topics: database, haskell-api, haskell-library, lmdb
• Language: Haskell
• Homepage: https://hackage.haskell.org/package/lmdb-simple
• Size: 43 KB
• Stars: 12
• Watchers: 2
• Forks: 11
• Open Issues: 6
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        

Simple Haskell API for LMDB

===========================

This package allows you to store arbitrary Haskell values in and retrieve them

from a persistent [Lightning Memory-mapped Database][LMDB] on disk.

  [LMDB]: https://symas.com/lightning-memory-mapped-database/

LMDB is a high-performance [ACID][]-compliant no-maintenance read-optimized

key-value store. Any Haskell type with a [`Serialise`][Serialise] instance can

be stored in an LMDB database, or used as a key to index one.

  [ACID]: https://en.wikipedia.org/wiki/ACID

  [Serialise]: https://hackage.haskell.org/package/serialise/docs/Codec-Serialise-Tutorial.html#g:3

This package provides a few different APIs for using LMDB:

  * The basic API provides transactional `put` and `get` functions to store

    and retrieve values from an LMDB database.

  * The extended API provides many functions similar to those in `Data.Map`,

    e.g. `lookup`, `insert`, `delete`, `foldr`, and so on.

  * The `View` API provides a read-only snapshot of an LMDB database that can

    be queried from pure code.

  * The `DBRef` API provides a mutable variable similar to `IORef` that is

    tied to a particular key in an LMDB database.