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HotStorage '23: Proceedings of the 15th ACM Workshop on Hot Topics in Storage and File Systems
ACM2023 Proceeding
Publisher:
  • Association for Computing Machinery
  • New York
  • NY
  • United States
Conference:
HotStorage '23: 15th ACM Workshop on Hot Topics in Storage and File Systems Boston MA USA 9 July 2023
ISBN:
979-8-4007-0224-2
Published:
10 July 2023
Sponsors:
In-Cooperation:
USENIX
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Abstract

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research-article
Neural Cloud Storage: Innovative Cloud Storage Solution for Cold Video

Cloud storage providers offer different pricing tiers based on the access frequency of stored data. This pricing plan offers cost benefits for videos that are accessed less than once per month. However, the stringent requirement falls short in ...

research-article
Open Access
NeSSA: Near-Storage Data Selection for Accelerated Machine Learning Training

Large-scale machine learning (ML) models rely on extremely large datasets to learn their exponentially growing number of parameters. While these models achieve unprecedented success, the increase in training time and hardware resources required is ...

research-article
SAND: A Storage Abstraction for Video-based Deep Learning

Deep learning has gained significant success in video applications such as classification, analytics, and self-supervised learning. However, when scaling out to a large volume of videos, existing approaches suffer from a fundamental limitation; they ...

research-article
Cache in Hand: Expander-Driven CXL Prefetcher for Next Generation CXL-SSD

Integrating compute express link (CXL) with SSDs allows scalable access to large memory but has slower speeds than DRAMs. We present ExPAND, an expander-driven CXL prefetcher that offloads last-level cache (LLC) prefetching from host CPU to CXL-SSDs. ...

research-article
P2Cache: An Application-Directed Page Cache for Improving Performance of Data-Intensive Applications

We propose P2Cache, an application-directed kernel-level page cache that allows an application developer to build a custom kernel-level page cache that matches the I/O characteristics of a target application. P2Cache extends a Linux kernel page cache ...

research-article
When Caching Systems Meet Emerging Storage Devices: A Case Study

Block-layer caching systems improve the I/O performance by using hybrid storage devices; the advent of fast, byte-addressable storage enables caching systems to further leverage new storage tiers (e.g., with persistent memory as the cache device and ...

research-article
Public Access
Do we still need IO schedulers for low-latency disks?

The performance of recent data storage devices has significantly improved over previous generations, with lower latency, greater throughput, and greater parallelism. Since we now have Ultra-Low Latency (ULL) data storage devices capable of providing ...

research-article
Public Access
Deep Note: Can Acoustic Interference Damage the Availability of Hard Disk Storage in Underwater Data Centers?

The growing worldwide attention toward large-scale subsea data centers has garnered substantial interest from commercial entities which have built and deployed underwater prototypes since 2015. These data centers utilize hard disk drives (HDDs) as a ...

research-article
Public Access
Energy Implications of IO Interface Design Choices

With the availability of high performance storage technology, there is extra pressure on the efficiency of IO interfaces. In addition to the popular POSIX synchronous, POSIX asynchronous, and Linux asynchronous (libaio) IO interfaces, there are two ...

research-article
Open Access
Excessive SSD-Internal Parallelism Considered Harmful

Modern SSDs achieve high throughput by utilizing multiple independent channels and chips in parallel. However, we find that excessive parallelism inadvertently amplifies the garbage collection (GC) overhead due to the larger unit of space reclamation. ...

research-article
A Study of Invalid Programming in 3D QLC NAND Flash Memories

3D QLC NAND flash memories are now widely applied in storage systems due to their high density. They adopt the two-step programming strategy to avoid severe program interference. This strategy results in a non-trivial time period between the two ...

research-article
Public Access
Hide-and-Seek: Hiding Secrets in Threshold Voltage Distributions of NAND Flash Memory Cells

In this paper, we propose a new page-writing technique to hide secret information using the threshold voltage variation of programmed memory cells. We demonstrate the proposed technique on the state-of-the-art commercial 3D NAND flash memory chips by ...

research-article
When F2FS Meets Compression-Based SSD!

Compression-based schemes have been widely studied to improve the lifetime and performance of solid-state drives (SSDs). Recently, the most popular flash-friendly file system (F2FS) started supporting compression to maximize the lifetime of NAND flash-...

research-article
Public Access
Input and Output Coverage Needed in File System Testing

File systems need testing to discover bugs and to help ensure reliability. Many file system testing tools are evaluated based on their code coverage. We analyzed recently reported bugs in Ext4 and BtrFS and found a weak correlation between code ...

research-article
Open Access
Is Garbage Collection Overhead Gone? Case study of F2FS on ZNS SSDs

The sequential write nature of ZNS SSDs makes them very well-suited for log-structured file systems. The Flash-Friendly File System (F2FS), is one such log-structured file system and has recently gained support for use with ZNS SSDs. The large F2FS ...

research-article
A Free-Space Adaptive Runtime Zone-Reset Algorithm for Enhanced ZNS Efficiency

While the state-of-the-art runtime zone-reset algorithm of the ZenFS in RocksDB is optimized for the performance of Zone Namespace (ZNS) SSDs, it does not take into account the lifetime constraint of ZNS SSDs. To address this issue, we present FAR, a ...

research-article
An Efficient Order-Preserving Recovery for F2FS with ZNS SSD

Storage devices use write buffers to improve performance, where multiple write requests are processed in parallel and completed in a random order. This may result in data loss in the event of a sudden failure. Therefore, Linux filesystems provide the ...

Contributors
  • IBM Research - Almaden
  • University of Minnesota Twin Cities
  • Northeastern University

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Acceptance Rates

Overall Acceptance Rate 34 of 87 submissions, 39%
YearSubmittedAcceptedRate
HotStorage '22471940%
HotStorage '21401538%
Overall873439%