Zoned namespace solid state drives (ZNS SSDs) provide superior capacity and life span compared to conventional namespace (CNS) SSDs at the same cost. Especially, a small-zone ZNS SSD can achieve a low write amplification factor (WAF) and performance ...

Uncontrolled over-fishing has been exemplified by the UN as a serious ecological challenge and a major threat to sustainable food supplies. Emerging trends within governing bodies point towards digital solutions by deploying CCTV-based video ...

The overall data traffic on the Internet has been rapidly growing, leading to a significantly increased cost of storing the exploding data. Decentralized and distributed file systems such as InterPlanetary File System (IPFS) and BitTorrent have been ...

This paper revisits the value of cache in DRAM-PM heterogeneous memory file systems. The first contribution is a comprehensive analysis of the existing file systems on heterogeneous memory, including cache-based and DAX-based (direct access). We find ...

Serverless platforms offer on-demand computation and represent a significant shift from previous platforms that typically required resources to be pre-allocated (e.g., virtual machines). As serverless platforms have evolved, they have become suitable ...

We present Chipmunk, a new framework to test persistent-memory (PM) file systems for crash-consistency bugs. Using Chipmunk, we discovered 23 new bugs across five PM file systems; most bugs have been confirmed and fixed by developers. The discovered ...

Distributed locks are used to guarantee the distributed client-cache coherence in parallel file systems. However, they lead to poor performance in the case of parallel writes under high-contention workloads. We analyze the distributed lock manager and ...

High-performance clusters and datacenters pose increasingly demanding requirements on storage systems. If these systems do not operate at scale, applications are doomed to become I/O bound and waste compute cycles. To accelerate the data path to remote ...

Persistent memory (PMem) is a low-latency storage technology connected to the processor memory bus. The Direct Access (DAX) interface promises fast access to PMem, mapping it directly to processes' virtual address spaces. However, virtual memory ...

File systems have many configuration parameters. Such flexibility comes at the price of additional complexity which could lead to subtle configuration-related issues. To address the challenge, we study the potential configuration dependencies of a ...

The Resilient File System (ReFS) from Microsoft promises new features such as increased performance and resilience compared to the New Technology File System (NTFS). On the downside, the ReFS drivers are growing more extensive and more complex, ...

While compression can provide significant storage and cost savings, its use within HPC applications is often only of secondary concern. This is in part due to the inflexibility of existing approaches where a single compression algorithm has to be used ...

Modern, large-scale scientific computing runs on complex exascale storage systems that support even more complex data workloads. Understanding the data access and movement patterns is vital for informing the design of future iterations of existing ...

In this work, we developed a new technique called Compulsory Compound Journaling (C2J) to increase the coalescing degree of shared updates in journal transactions. C2J introduces intentional delay in waking up the JBD thread to extend the interval ...

Recently, steganographic techniques for hiding data in file system metadata gained focus. Tools for commonly used file systems were published but the exFAT file system did not get much attention – probably because its structure provides only few ...

Developing and maintaining a file system is time-consuming, typically requiring years of effort. Developers often test compliance with APIs such as POSIX with hand-written regression suites that, alas, examine only a fraction of a file system's state ...

File systems for mobile devices usually preserve data consistency by ordered I/Os. However, maintaining I/O ordering prevents applications from fully exploiting device parallelism and thus degrades the storage performance. In this paper, we propose ...

POSIX-style read() and write() have long been the standard interface for accessing data in files. However, the data copy into and out of memory these methods require imposes an unnecessary overhead when files are stored in fast persistent memories (...

As solid state drives (SSDs) are increasingly replacing hard disk drives, the reliability of storage systems depends on the failure modes of SSDs and the ability of the file system layered on top to handle these failure modes. While the classical paper ...

The design and implementation of traditional file systems typically use the one-to-one mapping of logical files to their physical metadata representations. File system optimizations generally follow this rigid mapping and miss opportunities for an ...