This document reviews big data analytics (BDA) architecture trends and analysis. It discusses the evolution of data analytics from ancient times to modern technologies like Hadoop and Spark. It describes key features of BDA like flexibility, scalability, and fault tolerance. Common BDA architectures like lambda and kappa architectures are summarized. The lambda architecture uses batch, speed, and serving layers to handle both real-time and batch processing. The kappa architecture simplifies this by removing the batch layer and handling all processing through streaming. Overall, the document provides a high-level overview of BDA architectures and technologies.