https://github.com/lithammer/python-jump-consistent-hash
Fast, minimal memory, consistent hash algorithm
https://github.com/lithammer/python-jump-consistent-hash
consistent-hashing python
Last synced: 3 months ago
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Fast, minimal memory, consistent hash algorithm
- Host: GitHub
- URL: https://github.com/lithammer/python-jump-consistent-hash
- Owner: lithammer
- License: mit
- Created: 2015-03-17T09:22:16.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2024-12-01T09:34:18.000Z (7 months ago)
- Last Synced: 2025-03-29T09:11:40.045Z (3 months ago)
- Topics: consistent-hashing, python
- Language: Python
- Homepage: https://pypi.org/project/jump-consistent-hash/
- Size: 206 KB
- Stars: 41
- Watchers: 2
- Forks: 7
- Open Issues: 0
-
Metadata Files:
- Readme: README.rst
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
Jump Consistent Hash
--------------------
.. image:: https://github.com/lithammer/python-jump-consistent-hash/workflows/Python/badge.svg
:alt: Build Status
:target: https://github.com/lithammer/python-jump-consistent-hash/actions
Python and C implementation of the jump consistent hash algorithm by John
Lamping and Eric Veach[1]. Tested on Python 3.8+.
Install
-------
To install Jump Consistent Hash, simply run this simple command in your
terminal of choice::
$ pip install jump-consistent-hash
The C implementation is optional but is about 10x faster than the pure Python
implementation in CPython.
Usage
`````
.. code:: python
>>> import jump
>>> jump.hash(256, 1024)
520
If you want to use a ``str`` as a key instead of an ``int``, you can pass it
through a hash function to compute a real key. Here's a couple of examples
using Python 3:
.. code:: python
>>> import hashlib
>>> int(hashlib.md5(b"127.0.0.1").hexdigest(), 16)
325870950296970981340734819828239218902
>>> int(hashlib.sha1(b"127.0.0.1").hexdigest(), 16)
431133456357828263809343936597625557575256328153
>>> import binascii
>>> binascii.crc32(b"127.0.0.1") & 0xffffffff
3619153832
>>> abs(hash("127.0.0.1"))
7536019783825143230
Links
`````
[1] http://arxiv.org/pdf/1406.2294v1.pdf