=============================== ZeroMQ - High-Speed Subscribers (Black Box Pattern) =============================== Example of High-Speed Subscribers (Black Box Pattern) in ZeroMQ

• ZeroMQ Guide: http://zguide.zeromq.org/py:chapter5#toc5

"A common use case for pub-sub is distributing large data streams like market data coming from stock exchanges. A typical setup would have a publisher connected to a stock exchange, taking price quotes, and sending them out to a number of subscribers. If there are a handful of subscribers, we could use TCP. If we have a larger number of subscribers, we'd probably use reliable multicast, i.e., PGM." - ZeroMQ Guide

Setup Environment & Run Example (Windows):

git clone https://github.com/ryansmccoy/zmq-high-speed-subs
cd zmq-high-speed-subs
conda create -n zmq-high-speed-subs python=3.8 pyzmq pandas numpy -y
activate zmq-high-speed-subs
pip install -r requirements.txt

Setup Environment & Run Example (Linux):

git clone https://github.com/ryansmccoy/zmq-high-speed-subs
cd zmq-high-speed-subs
conda create -n zmq-high-speed-subs python=3.8 pyzmq pandas numpy -y
source activate zmq-high-speed-subs
pip install -r requirements.txt

To run, open seperate terminal windows, run:

Publisher

$   activate zmq-high-speed-subs
$   python zmq_high_speed_subs\publisher_fakefeed.py

Output:

    2019-07-31 06:21:45,898 INFO     [Publisher-1(30632)]
    2019-07-31 06:21:45,967 INFO     [Publisher-1(30632)]
    2019-07-31 06:21:45,986 INFO     [Publisher-1(30632)] Time Elapsed: 10.1 seconds
    2019-07-31 06:21:46,018 INFO     [Publisher-1(30632)] Messages During Period:       55008
    2019-07-31 06:21:46,026 INFO     [Publisher-1(30632)] Messages Per Second:  5443.9
    2019-07-31 06:21:46,032 INFO     [Publisher-1(30632)]
    2019-07-31 06:21:46,041 INFO     [Publisher-1(30632)] Total Messages Published :    32950459
    2019-07-31 06:21:46,059 INFO     [Publisher-1(30632)]
    2019-07-31 06:21:46,065 INFO     [Publisher-1(30632)]

Subscriber-to-Pusher

$   activate zmq-high-speed-subs
$   python zmq_high_speed_subs/_10_manager.py

Output:

    2019-07-31 04:57:47,588 INFO     [ZMQSubscriber(31384)]
    2019-07-31 04:57:47,588 INFO     [ZMQSubscriber(31384)] Time Elapsed:   10 seconds
    2019-07-31 04:57:47,589 INFO     [ZMQSubscriber(31384)] Messages During Period: 7359215
    2019-07-31 04:57:47,589 INFO     [ZMQSubscriber(31384)] Messages Per Second:    5502.83
    2019-07-31 04:57:47,589 INFO     [ZMQSubscriber(31384)]
    2019-07-31 04:57:47,589 INFO     [ZMQSubscriber(31384)] Total Time Elapsed: 1516.85 seconds
    2019-07-31 04:57:47,590 INFO     [ZMQSubscriber(31384)] Total Messages: 7359215
    2019-07-31 04:57:47,590 INFO     [ZMQSubscriber(31384)] Total Messages Per Second:  4851.64
    2019-07-31 04:57:47,591 INFO     [ZMQSubscriber(31384)]
    2019-07-31 04:57:47,591 INFO     [ZMQSubscriber(31384)] Current _Queue Size:    23
    2019-07-31 04:57:47,592 INFO     [ZMQSubscriber(31384)]

    2019-07-31 04:57:55,951 INFO     [ZMQPusher(45028)]
    2019-07-31 04:57:55,951 INFO     [ZMQPusher(45028)] Time Elapsed:   10 seconds
    2019-07-31 04:57:55,952 INFO     [ZMQPusher(45028)] Messages During Period: 55008
    2019-07-31 04:57:55,952 INFO     [ZMQPusher(45028)] Messages Per Second:    5494.9
    2019-07-31 04:57:55,952 INFO     [ZMQPusher(45028)]
    2019-07-31 04:57:55,953 INFO     [ZMQPusher(45028)] Total Time Elapsed: 1524.16 seconds
    2019-07-31 04:57:55,953 INFO     [ZMQPusher(45028)] Total Messages: 7414199
    2019-07-31 04:57:55,953 INFO     [ZMQPusher(45028)] Total Messages Per Second:  4864.46
    2019-07-31 04:57:55,954 INFO     [ZMQPusher(45028)]
    2019-07-31 04:57:55,954 INFO     [ZMQPusher(45028)] Current _Queue Size:    0
    2019-07-31 04:57:55,954 INFO     [ZMQPusher(45028)]

    2019-07-31 04:57:56,005 INFO     [ZMQPuller (30656)]
    2019-07-31 04:57:56,005 INFO     [ZMQPuller (30656)] Time Elapsed:  10 seconds
    2019-07-31 04:57:56,006 INFO     [ZMQPuller (30656)] Messages During Period:    55000
    2019-07-31 04:57:56,006 INFO     [ZMQPuller (30656)] Messages Per Second:   5484.78
    2019-07-31 04:57:56,006 INFO     [ZMQPuller (30656)]
    2019-07-31 04:57:56,007 INFO     [ZMQPuller (30656)] Total Time Elapsed:    1517.3 seconds
    2019-07-31 04:57:56,007 INFO     [ZMQPuller (30656)] Total Messages Distributed to finished Workers:    7390000
    2019-07-31 04:57:56,008 INFO     [ZMQPuller (30656)] Total Messages Per Second: 4870.48
    2019-07-31 04:57:56,008 INFO     [ZMQPuller (30656)]
    2019-07-31 04:57:56,010 INFO     [ZMQPuller (30656)]    Total Messages in _Queue:    1699
    2019-07-31 04:57:56,010 INFO     [ZMQPuller (30656)]    Currently Running Workers:   12
    2019-07-31 04:57:56,011 INFO     [ZMQPuller (30656)]

    2019-07-31 04:57:53,607 INFO     [Worker    (23848)]
    2019-07-31 04:57:53,607 INFO     [Worker    (23848)] Worker Messages Time Elapsed:  1.71 seconds
    2019-07-31 04:57:53,607 INFO     [Worker    (23848)] Worker Messages:   2501
    2019-07-31 04:57:53,608 INFO     [Worker    (23848)] Worker Messages Per Second:    1458.61
    2019-07-31 04:57:53,608 INFO     [Worker    (23848)]
    2019-07-31 04:57:53,608 INFO     [Worker    (23848)] COMPLETED
    2019-07-31 04:57:53,608 INFO     [Worker    (23848)]

If want to connect to database, rename .env.template to .env and enter your data base info:

# .env
DB_HOST=localhost
DB_DATABASE=zmq-example
DB_TABLE=data
DB_USERNAME=python
DB_PASSWORD=h1ghsp33d

• Free software: MIT license
• Documentation: https://zmq-high-speed-subs.readthedocs.io.