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Belief-Based Storage Systems

Dusan Ramljak, Krishna Kant
2017 USENIX Workshop on Hot Topics in Storage and File Systems  
Next, in each storage system we could identify at least three grouping levels (e.g. Block level, File level, Groups of files level).  ...  Here, we discuss possible ways to extend this framework towards belief based storage systems.  ... 
dblp:conf/hotstorage/RamljakK17 fatcat:nsrumqjvpzc4xkweeexedymqle

Toward Eidetic Distributed File Systems

Xianzheng Dou, Jason Flinn, Peter M. Chen
2015 USENIX Workshop on Hot Topics in Storage and File Systems  
We propose a new point in the design space of versioning and provenance-aware file systems in which the entire operating system, not just the file system, supports such functionality.  ...  This leads to a new file system design where the log of nondeterministic inputs, not file data, is the fundamental unit of persistent storage.  ...  Thus, the file system should also store the values of data and metadata for current files and directories (in much the same way that a journaling file system stores the current file system state in addition  ... 
dblp:conf/hotstorage/DouFC15 fatcat:netsiet34naihavvlivgh2ahcq

Towards Paravirtualized Network File Systems

Raja Appuswamy, Sergey Legtchenko, Antony I. T. Rowstron
2014 USENIX Workshop on Hot Topics in Storage and File Systems  
The virtualized storage stack used in enterprise data centers provides two mechanisms to enable virtualized applications to store and retrieve data, namely, virtual disks and network file systems.  ...  In doing so, we present paravirtualized NFS, an alternate mechanism for accessing data, highlight its benefits, and outline research challenges involved in realizing it in practice.  ...  of file systems and block schedulers in the guest OS and the storage server.  ... 
dblp:conf/hotstorage/AppuswamyLR14 fatcat:amnlssii35dnhgyx36ojoe5ue4

The Case for Dual-access File Systems over Object Storage

Kunal Lillaney, Vasily Tarasov, David Pease, Randal C. Burns
2019 USENIX Workshop on Hot Topics in Storage and File Systems  
In this position paper we argue that there is a need for dual-access file systems over object storage, and examine some representative use cases which benefit from such systems.  ...  Object storage has emerged as a low-cost and hyperscalable alternative to distributed file systems.  ...  Acknowledgements: This work was funded by grants from IBM Research, NSF (IOS-1707298, OCE-1633124, IIS-1447639) and NIH (1R01NS092474, 1U01NS090449).  ... 
dblp:conf/hotstorage/LillaneyTPB19 fatcat:4k3lmsursnhpjakakbzria2hyi

Processing in Storage Class Memory

Joel Nider, Craig Mustard, Andrada Zoltan, Alexandra Fedorova
2020 USENIX Workshop on Hot Topics in Storage and File Systems  
Storage-class memory (SCM) delivers near-DRAM performance in non-volatile storage media and became commercially available in 2019.  ...  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.  ...  These operations must be performed each time a block is transferred between persistent storage and main memory. 1 Optane NVRAM here was used as a block device with a file system on top (no dax option)  ... 
dblp:conf/hotstorage/NiderMZF20 fatcat:fdml2nzdyzfexbkip5dz4syeka

Open Addressable Device Tiers

Andy Kowles
2017 USENIX Workshop on Hot Topics in Storage and File Systems  
of shingled disks in enterprise storage systems.  ...  Significantly, in another use case example, file systems (or other software) gain rollback capability of one revision for any block which is addressed to Media Cache.  ... 
dblp:conf/hotstorage/Kowles17 fatcat:e7d3byfd2bf2xgwb6qc7hqdlbi

File Systems as Processes

Jing Liu, Andrea C. Arpaci-Dusseau, Remzi H. Arpaci-Dusseau, Sudarsun Kannan
2019 USENIX Workshop on Hot Topics in Storage and File Systems  
We introduce file systems as processes (FSP), a storage architecture designed for modern ultra-fast storage devices.  ...  To study the potential advantages and disadvantages of the FSP approach, we develop DashFS, a prototype user-level file system. We discuss its architecture and show preliminary performance benefits.  ...  Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and may not reflect the views of NSF, DOE, or any other institutions.  ... 
dblp:conf/hotstorage/LiuAAK19 fatcat:khjtcjr5qre5zpycbss2566lga

Understanding the Fault Resilience of File System Checkers

Om Rameshwar Gatla, Mai Zheng
2017 USENIX Workshop on Hot Topics in Storage and File Systems  
We systematically inject emulated faults to interrupt the checkers and examine the impact on the file system images.  ...  Motivated by real accidents, in this paper we study the behavior of file system checkers under faults.  ...  Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of NSF.  ... 
dblp:conf/hotstorage/GatlaZ17 fatcat:o5wkijel2ve2vpi33vt3oldpme

The TokuFS Streaming File System

John Esmet, Michael A. Bender, Martin Farach-Colton, Bradley C. Kuszmaul
2012 USENIX Workshop on Hot Topics in Storage and File Systems  
The TokuFS file system outperforms write-optimized file systems by an order of magnitude on microdata write workloads, and outperforms read-optimized file systems by an order of magnitude on read workloads  ...  Microdata write workloads include creating and destroying many small files, performing small unaligned writes within large files, and updating metadata.  ...  This work was supported by DOE Grant DE-FG02-08ER25853 and by NSF grants 1058565, 0937860, and 0937829.  ... 
dblp:conf/hotstorage/EsmetBFK12 fatcat:6pffexn24ndh3a7he6zr7znlmi

An Empirical Study of File-System Fragmentation in Mobile Storage Systems

Cheng Ji, Li-Pin Chang, Liang Shi, Chao Wu, Qiao Li, Chun Jason Xue
2016 USENIX Workshop on Hot Topics in Storage and File Systems  
In this paper, by conducting an empirical study of filesystem fragmentation on several aged mobile devices, we found that: 1) Files may suffer from severe fragmentation, and database files are among the  ...  most severely fragmented files; 2) Filesystem fragmentation does affect the performance of mobile devices, and the impact varies from devices to devices.  ...  This work is supported by the Fundamental Research Funds for the Central Universities (106112016CDJZR185512 and 106112014CDJZR185502), NSFC (61402059 and 61572411), and National 863 Programs 2015AA015304  ... 
dblp:conf/hotstorage/JiCSWLX16 fatcat:lokjsrhjmffj7iz2dwnd6fpcgu

Efficient QoS for Multi-Tiered Storage Systems

Ahmed Elnably, Hui Wang, Ajay Gulati, Peter J. Varman
2012 USENIX Workshop on Hot Topics in Storage and File Systems  
Multi-tiered storage systems using tiers of SSD and traditional hard disk is one of the fastest growing trends in the storage industry.  ...  In this paper, we first argue that providing QoS in multi-tiered systems is quite challenging and existing solutions aren't good enough for such cases.  ...  In first, we created a simulation model of a multi-tiered storage system using Yacsim [15] simulation environment. We created a system with 1 HD and 1 SSD.  ... 
dblp:conf/hotstorage/Elnably0GV12 fatcat:6idaskekkveefpuzf4533nalhq

On the Importance of Evaluating Storage Systems' $Costs

Zhichao Li, Amanpreet Mukker, Erez Zadok
2014 USENIX Workshop on Hot Topics in Storage and File Systems  
The SSD can be used as cache or as primary storage for hot data. Our system includes tunable parameters to enable trading off performance, energy use, and durability.  ...  We believe that cost should consider the workloads used over the storage systems' expected lifetime. We designed and developed a versatile hybrid storage system under Linux that combines HDD and SSD.  ...  However, the cache device in the caching system only contains hot data.  ... 
dblp:conf/hotstorage/LiMZ14 fatcat:rlibcbfvfncrdhzz53pjquse6m

Parametric Optimization of Storage Systems

Erez Zadok, Aashray Arora, Zhen Cao, Akhilesh Chaganti, Arvind Chaudhary, Sonam Mandal
2015 USENIX Workshop on Hot Topics in Storage and File Systems  
Often, storage systems are deployed with default configurations, rendering them sub-optimal.  ...  Previous research on parameter optimization was either limited to narrow problems or not widely applicable to storage stack parameter optimization in general.  ...  We thank the anonymous reviewers and our shepherd for their helpful comments. This work was made possible in part thanks to NSF awards CNS-1302246, CNS-1305360, CNS-1522834, and IIS-1251137.  ... 
dblp:conf/hotstorage/ZadokACCCM15 fatcat:r2xc2vidtbcehctoy7wett6nq4

CompoundFS: Compounding I/O Operations in Firmware File Systems

Yujie Ren, Jian Zhang, Sudarsun Kannan
2020 USENIX Workshop on Hot Topics in Storage and File Systems  
., system calls), data copy, and the VFS overheads between user-level application and the storage stack.  ...  Preliminary evaluation of Com-poundFS 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%  ...  We also thank Rutgers Panic Lab for giving us access to systems with DC Optane persistent memory. This work is supported by NSF CNS 1850297 award.  ... 
dblp:conf/hotstorage/RenZK20 fatcat:vx5rw66lczej7owyse6gjx2urm

Fair-EDF: A Latency Fairness Framework for Shared Storage Systems

Yuhan Peng, Peter Varman
2019 USENIX Workshop on Hot Topics in Storage and File Systems  
Under overload it selects a minimal number of requests to drop and to choose the dropped requests in a fair manner.  ...  We present Fair-EDF, a framework for latency guarantees in shared storage servers. It provides fairness control while supporting latency guarantees.  ...  Moreover, in clustered storage, requests belonging to a client are directed to different storage servers based on the placement and replication policies of the system.  ... 
dblp:conf/hotstorage/PengV19 fatcat:zyorsokpnfcqlg7y2ekuvo3o6i
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