I. Introduction
In smart healthcare ecosystems, embedded internet-of-things (IoT) based body wearables generate enormous healthcare big-data (HBD). The generated data is heterogeneous, fragmented, and diverse, and is stored at multiple locations [1], [2]. The HBD data is used for effective decision management systems in the healthcare ecosystem. Moreover, it is essential for telehealthcare, as we witness rapid growth in remote telemedicine post-COVID-19 era.