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8:30-10:50 AM
NVME-201-1: PCIe/NVMe Issues (NVMe Track)
Paper Title: Boosting QLC SSD Performance and Endurance for Data Centers

Paper Abstract: NVMe SSDs with QLC NAND offer higher density at lower costs than TLC SSDs albeit with lower write performance and reduced endurance. This makes QLC attractive but unsuitable for workloads with non-negligible write activity. LightOS, the new software-defined storage solution from Lightbits Labs, comes to the rescue. With its global FTL, data reduction, and data protection capabilities, it can increase the endurance of QLC SSDs up to 3x and achieve TLC levels of performance with QLC SSDs. In this talk, we will cover both the promise and challenges of QLC-based SSDs. We will show how LightOS with QLC SSDs delivers on the promise and overcomes the challenges.

Paper Author: Orit Wasserman, Sr Principal Software Engineer, Red Hat

Author Bio: Orit is a principal architect at Lightbits labs, an NVMe/TCP software-defined storage startup, where she is focusing on QLC SSD. Previously at Red Hat, she was a core developer of Ceph object storage, a highly available distributed software-defined storage designed to scale and handle PetaBytes scale. In her previous role at Red Hat she authored and co-maintained live migration for KVM/QEMU. She was also a researcher at IBM Research Labs, where she developed nested virtualization for KVM.