HBench:Java: an application-specific benchmarking framework for Java virtual machines
Proceedings of the ACM 2000 conference on Java Grande
Experiences with VI communication for database storage
ISCA '02 Proceedings of the 29th annual international symposium on Computer architecture
Structure and Performance of the Direct Access File System
ATEC '02 Proceedings of the General Track of the annual conference on USENIX Annual Technical Conference
The Case for Application-Specific Benchmarking
HOTOS '99 Proceedings of the The Seventh Workshop on Hot Topics in Operating Systems
Workload-specific file system benchmarks
Workload-specific file system benchmarks
An Efficient Zero-Copy I/O Framework for UNIX
An Efficient Zero-Copy I/O Framework for UNIX
Making the Most Out of Direct-Access Network Attached Storage
FAST '03 Proceedings of the 2nd USENIX Conference on File and Storage Technologies
Design and implementation of a direct access file system (DAFS) kernel server for FreeBSD
BSDC'02 Proceedings of the BSD Conference 2002 on BSD Conference
Cheating the I/O bottleneck: network storage with Trapeze/Myrinet
ATEC '98 Proceedings of the annual conference on USENIX Annual Technical Conference
ATEC '96 Proceedings of the 1996 annual conference on USENIX Annual Technical Conference
ATEC '99 Proceedings of the annual conference on USENIX Annual Technical Conference
End system optimizations for high-speed TCP
IEEE Communications Magazine
Implementation and performance study of a hardware-VIA-based network adapter on gigabit ethernet
Journal of Systems Architecture: the EUROMICRO Journal
HPCC'06 Proceedings of the Second international conference on High Performance Computing and Communications
Design and implementation of an improved zero-copy file transfer mechanism
PDCAT'04 Proceedings of the 5th international conference on Parallel and Distributed Computing: applications and Technologies
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The Direct Access File System (DAFS) is a distributed file system built on top of direct-access transports (DAT). Direct-access transports are characterized by using remote direct memory access (RDMA) for data transfer and user-level networking. The motivation behind the DAT-enabled distributed file system architecture is the reduction of the CPU overhead on the I/O data path.We have created an implementation of DAFS for the FreeBSD platform. In this paper we describe the performance evaluation study of DAFS that we have performed using this software. The goal of this study is to determine whether the architecture of DAFS brings any fundamental performance benefits to applications compared to traditional distributed file systems, such as NFS. We perform comparison of DAFS to a version of NFS optimized to reduce the I/O overhead. In order to thoroughly understand the impact of DAFS on application performance, we consider a diverse range of applications workloads.We conclude that DAFS can accomplish superior performance for latency-sensitive applications, outperforming NFS by up to a factor of 2. Bandwidth-sensitive applications do equally well on both systems, unless they are CPU-intensive, in which case they perform better on DAFS. We also found that RDMA is a less restrictive mechanism to achieve copy avoidance than that used by the optimized NFS.