PyTorch Kafka Dataset: A definition of a dataset to get training data from Kafka.

Overview

PyTorch Kafka Dataset: A definition of a dataset to get training data from Kafka.

Objectives

The main objective of this library is to take training data from Kafka to create a PyTorch Dataset. This is useful when we have data distributed in Kafka and we want to train a model with this framework. The structure of data messages in Kafka should be key:value, where key is the label and value the input.

Usage

To use this library, you just have to create a TrainingKafkaDataset with a ControlMessage, boostrapServers, and a group_id. Once the object has been created and the data has been obtained from Kafka, the object is usable as a normal PyTorch Dataset, being for example, iterable with a DataLoader.

ControlMessage is a dictionary, which principal keys are topic and input_config.

In topic, you have to proportionate a comma-separated string with the different topic, partition, start and end offset (those values separated with double dots, like in Kafka). In input_config, you have to indicate the reshapes of the data fetched from Kafka, this is because Kafka works in bytes, and its needed to decode back the inputs of our model.

boostrap_servers and group_id are common parameters used in KafkaConsumers. This parameters are given directly to the KafkaConsumers inside the object.

Here you have an example of creating a TrainingKafkaDataset:

kafkaControlMessage = {'topic': 'pytorch_mnist_test:0:0:20000,pytorch:0:20000:50000,pytorch_mnist_test:0:120000:140000',
                'input_config': {'data_type': 'uint8', 
                                 'label_type': 'uint8', 
                                 'data_reshape': '28 28', 
                                 'label_reshape': ''}, 
                }
bootstrap_server = ["localhost:9094"]
group_id = 'sink'
df = TrainingKafkaDataset(kafkaControlMessage, bootstrap_server, group_id, ToTensor())

Examples

There is a folder with full example of Data Fetching and training of a model, specifically with MNIST dataset.

Owner
ERTIS Research Group
Ertis Research Group
ERTIS Research Group
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