py-turbo 0.2

A pipeline system for efficient execution.

Pyturbo Package

Author: Lijun Yu

Email: [e-mail]

A pipeline system for efficient execution.

Installation

pip install py-turbo

Introduction

Pyturbo utilizes multiple level of abstract to efficiently execute parallel tasks.

• Worker: a process.
• Stage: a group of peer workers processing the same type of tasks.
• Task: a data unit transferred between stages. At each stage, a task is processed by one worker and will result in one or multiple downstream tasks.
• Pipeline: a set of sequential stages.
• Job: a data unit for a pipeline, typically a wrapped task for the first stage.
• Result: output of a job processed by one pipeline, typically a set of output tasks from the last stage.
• System: a set of peer pipelines processing the same type of jobs.

Get Started

from pyturbo import ReorderStage, Stage, System

class Stage1(Stage): # Define a stage

    def __init__(self, resources):
        ... # Optional: set resources and number of workers

    def process(self, task):
        ... # Process function for each worker process. Returns one or a series of downstream tasks.

... # Repeat for Stage2, Stage3

class Stage4(ReorderStage): # Define a reorder stage, typically for the final stage

    def get_sequence_id(self, task):
        ... # Return the order of each task. Start from 0.

    def process(self, task):
        ...

class MySystem(System):

    def get_stages(self, resources):
        ... # Define the stages in a pipeline with given resources.

    def get_results(self, results_gen):
        ... # Define how to extract final results from output tasks.

def main():
    system = MySystem(num_pipeline) # Set debug=True to run in a single process
    system.start() # Build and start system
    system.add_job(...) # Submit one job
    finished_job = system.result_queue.get() # Wait for result
    system.end() # End system

Demo

See demo.py for an example implementation.

Version History

See version.md.