proxenos
A Python toolkit for Rendezvous/Highest Random Weight (HRW) hash based routing.
>>> import proxenos.mappers.consul
>>> import proxenos.rendezvous
>>> mapper = proxenos.mappers.consul.ConsulClusterMapper(
... host='localhost', port=8500)
>>> mapper.update()
>>> mapper.cluster
{SocketAddress(host=IPAddress('::'), port=8000),
SocketAddress(host=IPAddress('::'), port=8001),
SocketAddress(host=IPAddress('::'), port=8300),
SocketAddress(host=IPAddress('::'), port=8500)}
>>> mapper.select('github.com', proxenos.rendezvous.HashMethod.SIPHASH)
SocketAddress(host=IPAddress('::'), port=8001)$ proxenos select -b consul -h localhost -p 8500 github.com
0.0.0.0:8300Features
Support for multiple service discovery backends possible. Currently only support for Consul is implemented, but other backends coming eventually.
Supports many different hash functions and PRFs. The default hashing method is the SipHash PRF.
Provides a command-line interface for quickly testing/debugging node selection.
Installation
$ pip install proxenos
$ # If you'd like Murmur3 support, use:
$ pip install proxenos[murmur]Notes
proxenos uses Python’s PRNG for calculating the weight of nodes in a cluster, rather than using a linear congruential generator (LCG) as described in the original paper on Rendezvous hashing. Seeded weights generated are limited to sys.maxsize, which means the resulting weights will differ depending on the platform architecture.
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Release files for proxenos 0.0.3
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