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A Performance Isolation Scheme for Multi-Tenant Shared ZNS SSD

Jianjun Cao, Qidong Ding, Xinpeng Xu, Hanze Zhang and 2 more

Electronics | Jul 29, 2026

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What this paper is about

A tenant pressure-aware performance isolation scheme, called IP-Zone, is proposed that partitions users into independent regions and maximizes zone parallelism through cross-resource allocation and flexible address mapping and improves IOPS and throughput.

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In cloud computing, multi-tenant shared storage is widely used for efficiency. ZNS SSDs have become a popular choice due to their high throughput and low latency. However, they still face challenges: the zone structure is not exposed to tenants, making performance control difficult, and the multi-namespace design can lead to wasted performance when tenant workloads are highly imbalanced. This paper proposes a tenant pressure-aware performance isolation scheme, called IP-Zone, that partitions users into independent regions and maximizes zone parallelism through cross-resource allocation and flexible address mapping. For severely unbalanced loads, a complementary load-aware strategy dynamically reallocates bandwidth among tenants to improve SSD utilization. Experiments show that this scheme improves IOPS and throughput by 34.6% and 25.0% over traditional channel isolation, while average and tail latencies are reduced by 76.3% and 36.0% compared to black-box sharing.

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Authors

Researchers on this paper

Jianjun Cao

first | China Electronics Technology Group Corporation

Qidong Ding

middle | Xi'an Jiaotong University

Xinpeng Xu

middle | China Electronics Technology Group Corporation

Hanze Zhang

middle | Xi'an Jiaotong University | ORCID 0009-0009-0579-5707

Ping She

middle | China Electronics Technology Group Corporation

Shiqiang Nie

last | Xi'an Jiaotong University | ORCID 0000-0003-2215-7159

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Citation

BibTeX

@article{Cao2026Performance,
  title = {A Performance Isolation Scheme for Multi-Tenant Shared ZNS SSD},
  author = {Jianjun Cao and Qidong Ding and Xinpeng Xu and Hanze Zhang and Ping She and Shiqiang Nie},
  journal = {Electronics},
  year = {2026},
  doi = {10.3390/electronics15153348},
  url = {https://doi.org/10.3390/electronics15153348}
}

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