IAM roles are crucial for access management in AWS. This article provides a step-by-step walkthrough for creating a user-specific IAM role, attaching necessary policies, and validating for security and functionality. Step 1: Compose a JSON file named assume-role-policy.json. This policy explicitly defines the trusted entities that can assume the role, effectively safeguarding it against unauthorized access.

Apache Spark is a powerful distributed data processing engine widely used in big data and machine learning applications. Thanks to its enriched API and robust data structures such as DataFrames and Datasets, it offers a higher level of abstraction than traditional map-reduce jobs. Spark Code Execution Journey Parsing Spark SQL queries or DataFrame API methods…

System design interviews can be daunting due to their complexity and the vast knowledge required to excel. Whether you’re a recent graduate or a seasoned engineer, preparing for these interviews necessitates a well-thought-out strategy and access to the right resources. …

As cloud computing continues to evolve, microservices architectures are becoming increasingly complex. To effectively manage this complexity, service meshes are being adopted. In this article, we will explain what a service mesh is, why it is necessary for modern cloud architectures, and how it addresses some of the most pressing…

Reverse ETL is the process of moving data from data warehouses or data lakes back to operational systems, applications, or other data sources. …

Apache Spark, one of the most powerful distributed data processing engines., provides multiple ways to handle corrupted records during the read process. These methods, known as read modes, allow users to decide how to address malformed data. …

In this article, I talk about how to build a system like Twitter. I focus on the problems that come up when very famous people, like Elon Musk, tweet and many people see it at once. I’ll share the basic steps, common issues, and how to keep everything running smoothly…

API, short for Application Programming Interface, is a fundamental concept in software development. It establishes well-defined methods for communication between software components, enabling seamless interaction. APIs define how software components communicate effectively. Key Concepts in APIs: Interface vs. Implementation: An API defines an interface through which one software piece can interact with another, just…

Column selection is a frequently used operation when working with Spark DataFrames. Spark provides two built-in methods select() and selectExpr(), to facilitate this task. In this article, we will discuss how to use both methods, explain their main differences, and provide guidance on when to choose one over the other. …