Azure Data Factory vs. Apache Airflow | Know the Differences

What is Azure Data Factory and Apache Airflow?

Data-driven decision-making allows organizations to make strategic decisions and take actions that align with their objectives and goals at the right time. Undoubtedly, organizations are generating petabytes of data but still struggle with automatic data processing, data collection, pipeline creation, and monitoring. Before extracting and understanding data patterns and insights, businesses must address challenges in data preprocessing in ML, real-time streaming applications with Apache Spark, and securing data workflows.

What is Azure Data Factory?

Azure Data Factory (ADF) is a data integration and migration service designed to simplify ETL (Extract, Transform, Load) and ELT (Extract, Load, Transform) workflows. As a fully managed serverless solution, ADF enables organizations to ingest, prepare, and transform data at scale. Microsoft provides ADF as part of Azure’s cloud ecosystem for constructing enterprise-grade data pipelines.

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What are the advantages of Azure Data Factory?

Below given are the advantages of Azure Data Factory:

1. Easy to use: It rehosts and extends SSIS in a few clicks. ADF helps to modernize the SSIS. It makes it easy to move all SSIS packages to the cloud. Moreover, it builds code-free ETL and ELT pipelines with built-in Git and CI/CD support.
2. Cost-effective: ADF is cost-effective by nature as it allows pay-as-you-use. It is a fully managed serverless cloud service that scales on demand.
3. Powerful Integrations: It has 90 built-in connectors that allow it to ingest data from all on-premises and software as a service (SaaS) sources. Prepare and monitor data pipelines code-free at scale.
4. AI-Driven Automation: With autonomous ETL, ADF enhances operational efficiency and supports intelligent data pipelines.

What is Apache Airflow?

Apache Airflow is an open-source workflow orchestration tool that enables the scheduling, monitoring, and execution of complex workflows. It represents data workflows as Directed Acyclic Graphs (DAGs), where tasks are executed based on dependencies. When comparing Azure Data Factory vs. Apache Airflow, Airflow is preferred for its flexibility in custom Python-based workflow automation.

1. Scheduler: It handles triggering schedules workflows and submitting tasks to the executor to run.

2. Executor: It handles the running of tasks. It runs everything inside the scheduler by default, but most production-suitable executors push task execution out to workers.

3. Web Server: It presents a handy user interface to inspect, trigger and debug DAGs behavior and task.

4. DAG file: A folder of DAG files that are read by the scheduler and executor.

5. Metadata database: It is a metadata database that is used by scheduler web server uses a metadata database and executor to store data.

What are the advantages of Apache Airflow?

The advantages of Apache Airflow are described below:

1. Open Source: Apache Airflow is an open-source service wherever improvements can be made quickly. It has no barriers and prolonged procedures.

2. Easy to use: Anyone with Python knowledge can deploy a workflow. It can be used to transfer data, manage infrastructure, build ML models, and more.

3. Robust Integrations: It offers plug-and-play operators that can be used to execute tasks on Google Cloud Platform, Amazon Web Services, Microsoft Azure, and other third-party services. This capability makes Airflow easy to apply to current infrastructure and extends to next-generation technologies.

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Why Choose Apache Airflow or Azure Data Factory for Data Orchestration?

As organizations move into the cloud and big data, data integration and migration will remain essential elements for organizations across industries. ADF helps to address these two issues efficiently and hence enables to focus on data and allow to schedule, monitor, and manage ETL/ELT pipelines with a single view.

Let’s discuss some reasons why the adoption of Azure Data Factory is on the rise:

1. To drive more value

2. Improve business process outcomes

3. Reduce overhead expenses

4. Better decision-making

5. Increase business process agility

6. Cost-effective process

How do Apache Airflow and Azure Data Factory help businesses?

Here it will discuss some customer stories and their view to justify how ADF and Airflow change their business and helps them to reach their goals:

Apache Airflow

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Problem: Big data systems require sophisticated data pipelines that connect to a variety of backend services in order to support complex operations. These workflows must be deployed, monitored, and executed regularly or in response to external events. Organization’s Experience Platform component services designed and developed an orchestration service that allows users to author, schedule, and monitor complex hierarchical workflows for Apache Spark and non-Spark jobs. While working with various applications and managing them, organizations face several issues due to its complexity.

Solution: Apache Airflow allows Organisations Experience Platform to create smooth orchestration services to meet customer requirements. It is built on guiding principles to leverage an off-the-shelf, open-source orchestration engine abstracted to other services via an API and extendable to any application via a pluggable framework. The platform uses the Apache Airflow execution engine for scheduling and executing various workflows. Moreover, it provides insight related to workflows.

ADF

Problem: The organization creates a Saas data solution that organizations can use to make transformative, data-driven decisions. As the data warehouse grew, the maintenance of existing data increasingly required updates to accommodate changes to the data feeds. Keeping updating ETL processes, and data models is a big maintenance effort; therefore, there is a need for a more intelligent approach.

Solution: To solve this problem they use Microsoft technologies that automatically generates data warehouses and performs ETL process for customer specs. This process has drastically reduced the development cost and time.

What is the key feature of Apache Airflow and Azure Data Factory?

Apache Airflow vs. Azure Data Factory: Key Differences and Comparison

Let’s deep dive to compare ADF and Airflow based on some features:

Transformations

1. Azure Data Factory: It supports both pre and post-transformations with a wide range of transformation functions. Transformations can be applied using GUI or Power Query Online in which coding is required,

2. Apache Airflow: Apache Airflow is a tool for authoring, scheduling, and monitoring workflows as directed acyclic graphs of tasks (DAG). DAG is a topological representation that explains how data flows within a system. Apache Airflow manages the execution dependencies among jobs in DAG and supports job failures, retirements, and alerts. Data can be transformed as an action in the workflow using Python.

Connectors: Data sources and Destinations

These tools support a variety of data sources and Destinations

1. Azure Data Factory: ADF could integrate with about 80 data sources, including SaaS platforms, SQL and NoSQL databases, generic protocols, and several file types. Moreover, It supports approximately 20 cloud and on-premises data warehouses and database destinations.

2. Apache Airflow: Apache Airflow orchestrates workflow for ETL and stores data. It can run tasks, which are sets of activities, via operators and templates for tasks that Python functions or scripts can create. These operators can be created for any source or destination. Moreover, it also supports plugins to implement operators and hooks(interfaces to external platforms). It has some built-in plugins for databases and SaaS platforms.

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Support, documentation, and training

Working with these services can be complex, such as data integration; therefore, to support their customer, they offer some support via documentation, forums, and training.

1. Azure Data Factory: ADF provides support by an online request form and forums. It gives official comprehensive documentation. Customers can also contact via phones and Emails. It also offers digital training materials that can be completed.

2. Apache Airflow: Apache Airflow offers documentation with a quick start and how-to guide. It also supports the Slack community and provides some tutorials on its official website.

Pricing

Azure Data Factory: Pricing of Azure Data Factory

1. Frequency of activities: Based on the frequency such as high or low. Low-frequency activity does not execute more than once in a day rather than high-frequency activity can execute more than once in a day.
2. Pipeline activity: It checks whether the pipeline is active or not.
3. Place where activity is running: It tracks where the activity is running, such as on cloud or on-premise.
4. Re-running activities: Activities can be re-run. The cost of rerunning depends on the place where the activity is running.

1. Pipeline orchestration and execution

2. Data flow execution and debugging.

3. Number of Data Factory operations such as creating and monitoring pipeline

Apache Airflow

Apache Airflow is free and open source. It is licensed under Apache License 2.0. Deploying Airflow to a robust and secure production environment has always been challenging. Therefore, several companies, consultants, and cloud services offer enterprise support for deploying and managing Airflow environments, such as AWS, Google, Astronomer, etc. So, its price may vary according to the company. The pricing table of AWS is shown below.