storage

Deploying User-space TCP at Cloud Scale: Three Easy Pieces (to appear)
The TCP protocol remains to be the main workhorse in today’s large-scale data centers. However, the increasingly demanding performance …
Lingjun Zhu, Yifan Shen, Erci Xu (Corresponding), Bo Shi, Ting Fu, Shu Ma, Shuguang Chen, Zhongyu Wang, Hoanan Wu, Zhendan Yang, Xingyu Liao, Wei Lin, Yijun Hou, Rong Liu, Chao Shi, Jiaji Zhu, Jiesheng Wu
When Database Meets New Storage Devices: Understanding and Exposing Performance Mismatches via Configurations
NVMe SSD hugely boosts the I/O speed, with up to GB/s throughput and microsecond-level latency. Unfortunately, DBMS users can often …
Haochen He, Erci Xu, Shanshan Li, Zhouyang Jia, Si Zheng, Yue Yu, Jun Ma, Xiangke Liao
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Perseus: A Fail-Slow Detection Framework for Cloud Storage Systems (awarded Best Paper)
The newly-emerging ‘fail-slow’ failures plague both software and hardware where the victim components are still functioning …
Ruiming Lu, Erci Xu (co-first), Yiming Zhang, Fengyi Zhu, Zhaosheng Zhu, Mengtian Wang, Zongpeng Zhu, Guangtao Xue, Jiwu Shu, Minglu Li, Jiesheng Wu
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SMRSTORE: A Storage Engine for Cloud Object Storage on HM-SMR Drives

Cloud object storage vendors are in the forever pursuit of better cost efficiency. The emerging Shingled Magnetic Recording (SMR) drive …
Su Zhou, Erci Xu (Corresponding), Hao Wu, Yu Du, Jiacheng Cui, Wanyu Fu, Chang Liu, Yingni Wang, Wenbo Wang, Shouqu Sun, Xianfei Wang, Bo Feng, Biyun Zhu, Xin Tong, Weikang Kong, Linyan Liu, Zhongjie Wu, Jinbo Wu, Qingchao Luo, Jiesheng Wu
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NVMe SSD Failures in the Field: the Fail-Stop and the Fail-Slow
NVMe SSD has become a staple in modern datacenters thanks to its high throughput and ultra-low latency. Despite its popularity, the …
Ruiming Lu, Erci Xu (co-first), Yiming Zhang, Zhaosheng Zhu, Mengtian Wang, Zongpeng Zhu, Guangtao Xue, Minglu Li, Jiesheng Wu
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imDedup: A Lossless Deduplication Scheme to Eliminate Fine-grained Redundancy among Images
Images occupy a large amount of storage in data centers. To cope with the explosive growth of the image storage requirement, image …
Cai Deng, Qi Chen, Xiangyu Zou, Erci Xu, Bo Tang, Wen Xia
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Max: A Multicore-Accelerated File System for Flash Storage
The bandwidth of flash storage has been surging in recent years. Employing multicores to fully unleash its abundant bandwidth becomes a …
Xiaojian Liao, Youyou Lu, Erci Xu, Jiwu Shu
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Concordia: Distributed shared memory with in-network cache coherence
Distributed shared memory (DSM) is experiencing a resurgence with emerging fast network stacks. Caching, which is still needed for …
Qing Wang, Youyou Lu, Erci Xu, Junru Li, Youmin Chen, Jiwu Shu
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Write Dependency Disentanglement with HORAE
Storage systems rely on write dependency to achieve atomicity and consistency. However, enforcing write dependency comes at the expense …
Xiaojian Liao, Youyou Lu, Erci Xu, Jiwu Shu
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Lessons and Actions: What We Learned from 10K SSD-Related Storage System Failures

Modern datacenters increasingly use flash-based solid state drives (SSDs) for high performance and low energy cost. However, SSD …
Erci Xu, Mai Zheng, Feng Qin, Yikang Xu, Jiesheng Wu
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