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Visite de Gohar Irfan

Talk le 12 Décembre 2024

Unleashing The Potential of Datacenter SSDs by Taming Performance Variability

Gohar Irfan PhD student at MIT, accueilli dans l'équipe KrakOS au LIG

Abstract:
Storage disaggregation is widely adopted in today’s datacenters because it significantly improves disk utilization. However, efficiently disaggregating SSDs presents a unique challenge due to their inherent high performance variability. We propose Sandook, a rack-scale disaggregated storage system that dynamically adapts to SSDs’ varying performance. It leverages real-time performance monitoring to adaptively steer I/O requests to the most suitable SSDs on a microsecond timescale. Its logically centralized architecture allows for the simultaneous integration of multiple scheduling policies, including profile-driven load balancing, read/write segregation, and SSD congestion avoidance. Our evaluation demonstrates that Sandook is able to unlock the full performance potential of SSDs, achieving a 1.7× increase in storage IOPS while maintaining sub-millisecond tail latency and a 12–94% improvement in end-to-end application performance without requiring code changes.

Date et lieu

Jeudi 12 Décembre à 10h30
Amphi H de l'Ensimag

Publié le 3 décembre 2024

Mis à jour le 16 janvier 2025