Mariusz Barczak

The Cloud Storage Acceleration Layer (CSAL), an open-source host-based Flash Translation Layer (FTL) within the Storage Performance Development Kit (SPDK), has redefined cloud storage by transforming random write workloads into sequential patterns, optimizing performance and endurance for high-density NAND SSDs. This proposal introduces an enhanced CSAL framework integrating core scaling with RAID5F—a novel RAID implementation that eliminates the read-modify-write overhead and write hole problem inherent in traditional RAID5. By leveraging multi-core architectures to dynamically distribute CSAL’s write-shaping and data placement tasks, our approach achieves near-linear scalability across CPU cores while maintaining low-latency I/O. RAID5F, built on full-stripe writes and optimized parity computation, ensures data integrity without compromising performance, even under mixed workloads. This new configuration, paired with high-capacity QLC drives, exceeds performance, blends cost-efficiency and provides cutting-edge capabilities. Preliminary simulations and results demonstrate up to 2x throughput gains and a 30% reduction in write amplification compared to baseline CSAL deployments. This work positions CSAL with RAID5F as a cornerstone for next-generation cloud storage, delivering unmatched efficiency and reliability for hyperscale environments.

Mariusz Barczak

Principal Engineer - Storage Software Architect

Solidigm