In BIG Data, SMALL Things Matter
Tags: bigdata, development, community, data
Published: 2024-01-02 23:40:52

## Introduction

In the ever-accelerating world of big data, where technological advancements unfold at an unprecedented pace, it's easy to become enamored with cutting-edge solutions. However, amidst the excitement, the critical significance of meticulous planning, the dangers of over-engineering, and the enduring principles of core programming often take a back seat. This article aims to shed light on the often-overlooked aspects that can make or break a big data project — the small things.

## Good Planning and The Imperative of Automated processes

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ohuyni4v2y0ovexvl678.jpg)

In the realm of big data, where processes tend to move at a slower pace compared to other development fields, quality planning is non-negotiable. The sheer volume of data not only impacts processing capabilities but also involves a complex web of cross-dependent teams, resources, and systems. Every change must undergo meticulous analysis, considering not only the happy path but all possible scenarios, including edge cases. Automation has become the backbone of this process, extending from the development lifecycle to observability and, where feasible, even to support and maintenance layers.

### Example:

Consider a data engineering project aiming to build a robust ETL (Extract, Transform, Load) pipeline to handle large volumes of diverse data sources. In the era of big data, meticulous quality planning is paramount to ensure the reliability and efficiency of such pipelines.

Now, imagine a scenario where the team relies on manual processes for data validation and testing. Each change in the pipeline triggers a manual review, involving multiple teams and extensive coordination. This process is not only time-consuming but also prone to human error, especially when dealing with intricate data transformations and dependencies.

The true power of quality planning shines through when automation becomes the cornerstone of the process. By implementing automated testing at every stage of the ETL pipeline, from data ingestion to transformation and loading, the team can catch potential issues early in the development lifecycle. Automated tests simulate real-world scenarios, ensuring that the pipeline not only performs efficiently but also maintains data integrity across diverse datasets.

In contrast to the manual approach, automation accelerates the development cycle, reduces the risk of errors, and enhances the overall quality of the data engineering project. The mantra becomes clear: in the realm of data engineering, where precision is paramount, automation is not just a convenience; it's a necessity for ensuring the success of complex and dynamic pipelines.

## Over Engineering: Technology Alignment with Business Needs

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/yplo746dzek1fyr80zsh.jpg)

The plethora of technologies available to solve similar big data problems presents both opportunities and challenges. The ideal scenario involves selecting a technology that aligns seamlessly with the specific business problem at hand. Technology should be a flexible tool that adapts to the business, not a constraint that dictates how the business operates. Choosing a technology based solely on trends can lead to complex implementations, turning what should be a smooth process into a development nightmare.

### Example:

In the labyrinth of big data technologies, choosing the right tool for the job is crucial. Let's delve into the world of data engineering, where the choice of technology can significantly impact project success. Consider a scenario where a team, enticed by the latest and most complex data processing framework, opts for a solution that promises unparalleled performance and scalability. However, the catch is that this technology comes with a steep learning curve and demands extensive customization.

Despite its technical prowess, the chosen technology does not align seamlessly with the specific business problem at hand. In this case, the business requirements were relatively straightforward: process and analyze incoming data streams for real-time insights. The chosen complex framework, while technically impressive, introduced unnecessary complexities and increased the project's time-to-market.

Opting for a technology solely based on trends and technical capabilities can lead to over-engineering, turning what should be a streamlined data engineering process into a cumbersome development nightmare. A more pragmatic approach would have involved selecting a technology that aligns closely with the business needs, offering the necessary features without introducing unnecessary complexities. This way, the team could have delivered a robust solution more efficiently, meeting both technical and business objectives.

## Logic Is the Core: The Power of Unit Testing

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7q1ebjbzsad1nd88lmyg.jpg)

In the realm of development, especially for those new to object-oriented programming (OOP), the value of unit testing is often underestimated. A fundamental principle every engineer should remember is that logic issues need to be addressed within unit tests, not in higher or shared environments. Robust unit testing not only ensures the reliability of the code but also significantly reduces the time spent on support tasks, a crucial advantage in a field where processes tend to move at a slower pace.

### Example:
Imagine a scenario where a critical data pipeline was not thoroughly tested before deployment. In the rush to meet tight deadlines, the team skipped comprehensive unit testing, relying solely on the assumption that the code worked as intended. The oversight went unnoticed until the system was in production, and a seemingly minor logic error caused a cascading failure. The beauty of unit testing lies in catching such errors before they reach the production environment. In this case, had the team tested the pipeline thoroughly on a local environment, they could have replicated and rectified the issue, avoiding the costly consequences of a failure in a live system.

## Conclusion

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/odchaej7s4ueeumg5j23.jpg)

In the vast landscape of big data projects, it's imperative not to underestimate the impact of seemingly "small" things. Quality planning, steering clear of over-engineering, and adhering to core programming principles are not mere niceties but the pillars supporting successful and sustainable big data endeavors. As we navigate the complexities of big data, let's not forget that sometimes, the smallest details make the biggest difference.