WG-Storm: a resource-aware scheduler for distributed stream processing engines.

Stream processing engines (SPEs) allow applications to process a large amount of data in real-time. However, to schedule big data applications; the SPEs create several challenges regarding resource utilisation, dynamic configurations, heterogeneous environment, resource awareness, load balancing, etc. As the volume of data increases over time, it also poses a challenge to predict the resource and application requirements for processing. All these factors play an important role, they can cause problems in achieving maximum throughput due to inefficiency in any of them. Most SPEs ignore the topology's structure, which may minimise throughput during scheduling and may increase network latency. In this article, a topology-aware and resource-aware scheduler (named WG-Storm) is proposed based on a directed acyclic graph (DAG) that enhances resource usage and overall throughput using efficient task assignment. WG-Storm is built on Apache Storm. Results are generated using the two linear topologies and compared with the five state-of-art schedulers including A3-Storm, Default, Isolation, Multi-tenant, and Resource-aware. The experimental results show up to 30% increased throughput using the least required computing resources in a heterogeneous cluster.