# Eva: Cost-Efficient Cloud-Based Cluster Scheduling

arXiv: https://arxiv.org/abs/2503.07437 · HTML: https://mlsanity.com/paper/2503.07437/

## Key facts

- Cited by 3 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 10 Mar 2025.

## Built on by (most cited first, 3 of 3)

- [RouteBalance: Fused Model Routing and Load Balancing for Heterogeneous LLM Serving](https://mlsanity.com/paper/2606.17949/) (2026)
- [DiLaServe: High SLO Attainment Serving for Diffusion Language Models](https://mlsanity.com/paper/2606.29094/) (2026)
- [Gleam: Adaptive Network-Efficient CUDA API Remoting for Cross-Device GPU Sharing over LANs](https://mlsanity.com/paper/2607.23115/) (2026)

## Abstract (arXiv)

Cloud computing offers flexibility in resource provisioning, allowing an organization to host its batch processing workloads cost-efficiently by dynamically scaling the size and composition of a cloud-based cluster -- a collection of instances provisioned from the cloud. However, existing schedulers fail to minimize total cost due to suboptimal task and instance scheduling strategies, interference between co-located tasks, and instance provisioning overheads. We present Eva, a scheduler for cloud-based clusters that reduces the overall cost of hosting long-running batch jobs. Eva leverages reservation price from economics to derive the optimal set of instances to provision and task-to-instance assignments. Eva also takes into account performance degradation when co-locating tasks and quantitatively evaluates the trade-off between short-term migration overhead and long-term provision savings when considering a change in cluster configuration. Experiments on AWS EC2 and large-scale trace-driven simulations demonstrate that Eva reduces costs by 42% while incurring only a 15% increase in JCT, compared to provisioning a separate instance for each task.