Metadata-Version: 2.1
Name: moat-kv
Version: 0.70.15
Summary: A distributed no-master key-value store
Author-email: Matthias Urlichs <matthias@urlichs.de>
Project-URL: homepage, https://m-o-a-t.org
Project-URL: repository, https://github.com/M-o-a-T/moat-kv
Keywords: MoaT
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Information Technology
Classifier: License :: OSI Approved :: MIT License
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Framework :: AsyncIO
Classifier: Framework :: Trio
Classifier: Operating System :: POSIX :: Linux
Classifier: Operating System :: MacOS :: MacOS X
Classifier: Operating System :: Microsoft :: Windows
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Database
Classifier: Topic :: Home Automation
Classifier: Topic :: System :: Distributed Computing
Requires-Python: >=3.8
Description-Content-Type: text/x-rst
License-File: LICENSE
License-File: LICENSE.APACHE2
License-File: LICENSE.MIT
Requires-Dist: PyNaCl (>=1.3)
Requires-Dist: anyio (>=3)
Requires-Dist: asyncactor (>=0.21)
Requires-Dist: asyncclick (>7.99)
Requires-Dist: asyncscope (>=0.10.4)
Requires-Dist: asyncserf (>=0.16)
Requires-Dist: attrs (>=20)
Requires-Dist: jsonschema (>=2.5)
Requires-Dist: moat-lib-diffiehellman (~=0.13.1.6)
Requires-Dist: moat-mqtt (~=0.39.4)
Requires-Dist: moat-util (~=0.35.0)
Requires-Dist: psutil
Requires-Dist: range-set (>=0.2)
Requires-Dist: ruyaml (>=0.89)
Requires-Dist: simpleeval (>=0.9.10)
Requires-Dist: trio (>=0.18)
Requires-Dist: exceptiongroup ; python_version < "3.11"
Provides-Extra: dev
Requires-Dist: moat-src (>=0.5.0) ; extra == 'dev'

=======
MoaT-KV
=======

Welcome to `MoaT-KV <https://github.com/MoaT/moat-kv>`__!

MoaT-KV is a master-less distributed key-value storage system. It
circumvents the CAP theorem (you can't have all of consistency, availablilty,
and fault tolerance) using the assumption that a key is typically changed
by one node only. It is thus resistant to partitioning and intended to be
always-on; it will not block or lose updates, even in a partitioned
network.

MoaT-KV comes with several batteries included:

* Basic user management, pattern-based ACLs

* Strong typing, code- and/or `JSON Schema`-based

* Data mangling

* Background code execution

* Seamless recovery even if only one master is running

The underlying communication is based on MQTT. A Serf back-end is also
available. Others are easy to implement.

MoaT-KV was originally called "distkv".

API
===

MoaT-KV offers an efficient msgpack-based interface to access data and to
change internal settings. Most configuration is stored inside MoaT-KV
itself.

Stored data are **not** forced to be strings or binary sequences, but can
be anything that `MsgPack` supports. Keys to storage are multi-level and
support string, integer/float, and tuple keys.


Non-Features
============

MoaT-KV does not support data partitioning. Every node stores the whole
data set and can instantly deliver mostly-uptodate data.

MoaT-KV does not have a disk-based storage backend. Periodic snapshots and
event logs can be used to quickly restore a system, if necessary.

Status
======

MoaT-KV is mostly stable. There are a lot of corner cases that don't
have tests yet.

TODOs:
* some services (esp. command line tools and runners) are under-tested
* there's no good API for errors

TODO
====

* clean up some of the more egregious command line mistakes

* create a page for showcase-ing subprojects (knx owfs akumuli …)

* improve Home Assistant integration

