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检索条件"任意字段=Proceedings of the 12th USENIX Conference on Hot Topics in Storage and File Systems"

共 37 条记录，以下是21-30 订阅

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Designing a storage software stack for accelerators 20

Designing a storage software stack for accelerators

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Shinichi Awamoto Erich Focht Michio Honda IIJ and NEC Labs Europe NEC Deutschland University of Edinburgh

Although modern accelerator devices, such as vector engines and SmartNICs, are equipped with general purpose CPUs, access to the storage needs the mediation of the host kernel and CPUs, resulting in latency and throughput penalties. In this paper, we explore the case for direct storage access inside the accelerator applications, and discuss the problem, design options and benefits of this architecture. We demonstrate that our architecture can improve throughputs of LevelDB by 12-89%, and reduce the execution time by 33-46 % in a bioinformatics application in comparison to the baseline where the host system mediates the storage accesses.

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CompoundFS: compounding I/O operations in firmware file systems 20

CompoundFS: compounding I/O operations in firmware file syst...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Yujie Ren Jian Zhang Sudarsun Kannan Rutgers University ShanghaiTech University

We introduce CompoundFS, a firmware-level file system that combines multiple filesystem I/O operations into a single compound operation to reduce software overheads. the overheads include frequent interaction (e.g., system calls), data copy, and the VFS overheads between user-level application and the storage stack. Further, to exploit the compute capability of modern storage, CompoundFS also provides a capability to offload simple I/O data processing operations to the device-level CPUs, which further provides an opportunity to reduce interaction with the filesystem, move data, and free-up host CPU for other operations. Preliminary evaluation of CompoundFS against the state-of-the-art user-level, kernel-level, and firmware-level file systems using microbenchmarks and a real-world application shows up to 178% and 75% performance gains, respectively.

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Understanding and finding crash-consistency bugs in parallel file systems 20

Understanding and finding crash-consistency bugs in parallel...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Jinghan Sun Chen Wang Jian Huang Marc Snir University of Illinois at Urbana-Champaign

Parallel file systems (PFSes) and parallel I/O libraries have been the backbone of high-performance computing (HPC) infrastructures for decades. However, their crash consistency bugs have not been extensively studied, and the corresponding bug-finding or testing tools are lacking. In this paper, we first conduct a thorough bug study on the popular PFSes, such as BeeGFS and OrangeFS, with a cross-stack approach that covers HPC I/O library, PFS, and interactions with local file systems. the study results drive our design of a scalable testing framework, named PFSCHECK. PFSCHECK is easy to use with low performance overhead, as it can automatically generate test cases for triggering potential crash-consistency bugs, and trace essential file operations with low overhead. PFSCHECK is scalable for supporting large-scale HPC clusters, as it can exploit the parallelism to facilitate the verification of persistent storage states.

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A file system for safely interacting with untrusted USB flash drives 20

A file system for safely interacting with untrusted USB flas...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Ke Zhong Zhihao Jiang Ke Ma Sebastian Angel University of Pennsylvania Shanghai Jiao Tong University

this paper introduces RBFuse, a system for interacting with USB flash drives safely in commodity OSes while bypassing the complex and bug-prone USB stack on the host. RBFuse prevents attacks in which malicious USB flash drives exploit low-level USB driver vulnerabilities to compromise the host machine. the simple idea behind RBFuse is to remap the USB stack to a virtual machine and export the flash drive's file system as a mountable virtual file system. the result of this decomposition is that the host can access all the files in the flash drive without speaking USB. this is beneficial from a security standpoint, since the VFS interface is small, has well-defined semantics, and can be formally verified. RBFuse requires no hardware modifications and introduces low overhead.

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Processing in storage class memory 20

Processing in storage class memory

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Joel Nider Craig Mustard Andrada Zoltan Alexandra Fedorova University of British Columbia

storage and memory technologies are experiencing unprecedented transformation. storage-class memory (SCM) delivers near-DRAM performance in non-volatile storage media and became commercially available in 2019. Unfortunately, software is not yet able to fully benefit from such high-performance storage. Processing-in-memory (PIM) aims to overcome the notorious memory wall; at the time of writing, hardware is close to being commercially available. this paper takes a position that PIM will become an integral part of future storage-class memories, so data processing can be performed in-storage, saving memory bandwidth and CPU cycles. Under that assumption, we identify typical data-processing tasks poised for in-storage processing, such as compression, encryption and format conversion. We present evidence supporting our assumption and present some feasibility experiments on new PIM hardware to show the potential.

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SelectiveEC: selective reconstruction in erasure-coded storage systems 20

SelectiveEC: selective reconstruction in erasure-coded stora...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Liangliang Xu Min Lyu Qiliang Li Lingjiang Xie Yinlong Xu University of Science and Technology of China Anhui Province Key Laboratory of High Performance Computing

Erasure coding has been a commonly used approach to provide high reliability with low storage cost. But the skewed load in a recovery batch severely slows down the failure recovery process in storage systems. To this end, we propose a balanced scheduling module, SelectiveEC, which schedules reconstruction tasks out of order by dynamically selecting some stripes to be reconstructed into a batch and selecting source nodes and replacement nodes for each reconstruction task. So it achieves balanced network recovery traffic, computing resources and disk I/Os against single node failure in erasure-coded storage systems. Compared with conventional random reconstruction, SelectiveEC increases the parallelism of recovery process up to 106% and averagely bigger than 97% in our simulation. therefore, SelectiveEC not only speeds up recovery process, but also reduces the interference of failure recovery on the front-end applications.

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Can we store the whole world's data in DNA storage? 20

Can we store the whole world's data in DNA storage?

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Bingzhe Li Nae Young Song Li Ou David H.C. Du Department of Computer Science and Engineering University of Minnesota Twin Cities Department of Pediatrics University of Minnesota Twin Cities

the total amount of data in the world has been increasing rapidly. However, the increase of data storage capacity is much slower than that of data generation. How to store and archive such a huge amount of data becomes critical and challenging. Synthetic Deoxyribonucleic Acid (DNA) storage is one of the promising candidates with high density and long-term preservation for archival storage systems. the existing works have focused on the achievable feasibility of a small amount of data when using DNA as storage. In this paper, we investigate the scalability and potentials of DNA storage when a huge amount of data, like all available data from the world, is to be stored. First, we investigate the feasible storage capability that can be achieved in a single DNA pool/tube based on current and future technologies. then, the indexing of DNA storage is explored. Finally, the metadata overhead based on future technology trends is also investigated.

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the case for benchmarking control operations in cloud native storage 20

The case for benchmarking control operations in cloud native...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Alex Merenstein Vasily Tarasov Ali Anwar Deepavali Bhagwat Lukas Rupprecht Dimitris Skourtis Erez Zadok Stony Brook University IBM Research-Almaden

storage benchmarking tools and methodologies today suffer from a glaring gap--they are incomplete because they omit storage control operations, such as volume creation and deletion, snapshotting, and volume reattachment and resizing. Control operations are becoming a critical part of cloud storage systems, especially in containerized environments like Kubernetes, where such operations can be executed by regular nonprivileged users. While plenty of tools exist that simulate realistic data and metadata workloads, control operations are largely overlooked by the community and existing storage benchmarks do not generate control operations. therefore, for cloud native environments, modern storage benchmarks fall short of serving their main purpose--holistic and realistic performance evaluation. Different storage provisioning solutions implement control operations in different ways, which means we need a unified storage benchmark to contrast and comprehend their performance and expected behaviors. In this position paper, wemotivate the need for a cloud native storage benchmark by demonstrating the effect of control operations on storage provisioning solutions and workloads. We identify the challenges and requirements when implementing such benchmark and present our initial ideas for its design.

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SplitKV: splitting IO paths for different sized key-value items with advanced storage devices 20

SplitKV: splitting IO paths for different sized key-value it...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Shukai Han Dejun Jiang Jin Xiong SKL Computer Architecture ICT CAS University of Chinese Academy of Science

Modern advanced storage devices, such as modern NVMe SSD and non-volatile memory based persistent memory (PM), provide different access features when data size varies. Existing key-value stores adopt unified IO path for all key-value items, which cannot fully exploit the advantages of different advanced storage devices. In this paper, we propose to split IO paths for different sized key-value items. We let small key-value items be written directly to PM and then migrated to SSD. Meanwhile, large key-value items are directly written to SSD. We present and discuss design choices towards challenging issues of splitting IO paths. We build SplitKV, a key-value store prototype to show the benefits of splitting IO paths. the preliminary results show SplitKV outperforms RocksDB, KVell, and NoveLSM under small-large KV mixed workloads.

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Re-think data management software design upon the arrival of storage hardware with built-in transparent compression 20

Re-think data management software design upon the arrival of...

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proceedings of the 12th usenix conference on hot topics in storage and file systems

作者： Ning Zheng Xubin Chen Jiangpeng Li Qi Wu Yang Liu Yong Peng Fei Sun Hao Zhong Tong Zhang ScaleFlux Inc. RPI ScaleFlux Inc. and RPI

this position paper advocates that storage hardware with built-in transparent compression brings new opportunities to innovate data storage management software (e.g., database and filesystem). Modern storage appliances (e.g., all-flash array) and some latest SSDs (solid-state drives) can perform data compression transparently from OS and user applications. Such storage hardware decouples logical storage space utilization efficiency from physical storage space utilization efficiency. this allows data storage management software intentionally waste logical storage space in return for employing simpler data structures, leading to lower implementation complexity and higher performance. Following this theme, we carried out three preliminary case studies in the context of relational database and key-value (KV) store. Initial experimental results well demonstrate the promising potential, and it is our hope that this preliminary study will attract more interest towards exploring this new research area.

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