PLM<sup>light</sup>: Emulating Predictable Latency Mode in Regular SSDs

Roy, Tanaya; Gupta, Jit; Kant, Krishna; Pal, Amitangshu; Minturn, D.

doi:10.1109/nca53618.2021.9685772

2021 IEEE 20th International Symposium on Network Computing and Applications (NCA) 2021

DOI: 10.1109/nca53618.2021.9685772

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PLM^light: Emulating Predictable Latency Mode in Regular SSDs

Tanaya Roy

Jit Gupta

Krishna Kant

et al.

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2024

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Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

Gupta,

Kant,

Pal

et al. 2024

ACM Trans. Model. Perform. Eval. Comput. Syst.

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Modern data center storage systems are invariably networked to allow for consolidation and flexible management of storage. They also include high performance storage devices based on flash or other emerging technologies, generally accessed through low-latency and high throughput protocols such as NVMe (or its derivatives) carried over the network. With the increasing complexity and data-centric nature of the applications, properly configuring the quality of service (QoS) for the storage path has become crucial for ensuring the desired application performance. Such QoS is substantially influenced by the QoS in the network path, in the access protocol, and in the storage device. In this paper, we define a new transport level QoS mechanism for the network segment and demonstrate how it can augment and coordinate with the access level QoS mechanism defined for NVMe, and a similar QoS mechanism configured in the device. We show that the transport QoS mechanism not only provides the desired QoS to different classes of storage accesses but is also able to protect the access to the shared persistent memory (PM) devices located along with the storage but requiring much lower latency than storage. We demonstrate that a proper coordinated configuration of the 3 QoS’es on the path is crucial to achieve the desired differentiation depending on where the bottlenecks appear.

show abstract

Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

Gupta,

Kant,

Pal

et al. 2024

ACM Trans. Model. Perform. Eval. Comput. Syst.

View full text Add to dashboard Cite

show abstract

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PLM^light: Emulating Predictable Latency Mode in Regular SSDs

Cited by 1 publication

References 13 publications

Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

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PLMlight: Emulating Predictable Latency Mode in Regular SSDs

Cited by 1 publication

References 13 publications

Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

Configuring and Coordinating End-to-end QoS for Emerging Storage Infrastructure

Contact Info

Product

Resources

About

PLM^light: Emulating Predictable Latency Mode in Regular SSDs