Reimplementing the Cedar file system using logging and group commit
SOSP '87 Proceedings of the eleventh ACM Symposium on Operating systems principles
The design and implementation of a log-structured file system
ACM Transactions on Computer Systems (TOCS)
UNIX internals: the new frontiers
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DCD—disk caching disk: a new approach for boosting I/O performance
ISCA '96 Proceedings of the 23rd annual international symposium on Computer architecture
Removal policies in network caches for World-Wide Web documents
Conference proceedings on Applications, technologies, architectures, and protocols for computer communications
On performance of caching proxies (extended abstract)
SIGMETRICS '98/PERFORMANCE '98 Proceedings of the 1998 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
Using System-Level Models to Evaluate I/O Subsystem Designs
IEEE Transactions on Computers
Piggyback server invalidation for proxy cache coherency
WWW7 Proceedings of the seventh international conference on World Wide Web 7
NetCache architecture and deployment
Computer Networks and ISDN Systems - Selected papers of the 3rd international caching workshop
Soft updates: a solution to the metadata update problem in file systems
ACM Transactions on Computer Systems (TOCS)
Scalable internet servers: issues and challenges
ACM SIGMETRICS Performance Evaluation Review
EW 7 Proceedings of the 7th workshop on ACM SIGOPS European workshop: Systems support for worldwide applications
Boosting I/O performance of internet servers with user-level custom file systems
ACM SIGMETRICS Performance Evaluation Review
A performance study of the Squid proxy on HTTP/1.0
World Wide Web
Efficient Algorithms for Persistent Storage Allocation
MSS '01 Proceedings of the Eighteenth IEEE Symposium on Mass Storage Systems and Technologies
Beating the I/O Bottleneck: A Case for Log-Structured File Systems
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Towards higher disk head utilization: extracting free bandwidth from busy disk drives
OSDI'00 Proceedings of the 4th conference on Symposium on Operating System Design & Implementation - Volume 4
Secondary storage management for web proxies
USITS'99 Proceedings of the 2nd conference on USENIX Symposium on Internet Technologies and Systems - Volume 2
Study of piggyback cache validation for proxy caches in the world wide web
USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
The measured access characteristics of world-wide-web client proxy caches
USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
System design issues for internet middleware services: deductions from a large client trace
USITS'97 Proceedings of the USENIX Symposium on Internet Technologies and Systems on USENIX Symposium on Internet Technologies and Systems
File system logging versus clustering: a performance comparison
TCON'95 Proceedings of the USENIX 1995 Technical Conference Proceedings
Embedded inodes and explicit grouping: exploiting disk bandwidth for small files
ATEC '97 Proceedings of the annual conference on USENIX Annual Technical Conference
Reducing the disk I/O of web proxy server caches
ATEC '99 Proceedings of the annual conference on USENIX Annual Technical Conference
The design and implementation of a DCD device driver for Unix
ATEC '99 Proceedings of the annual conference on USENIX Annual Technical Conference
Traffic analysis of a Web proxy caching hierarchy
IEEE Network: The Magazine of Global Internetworking
Tulip: A New Hash Based Cooperative Web Caching Architecture
The Journal of Supercomputing
Web object-based storage management in proxy caches
Future Generation Computer Systems
A light-weight, collaborative temporary file system for clustered Web servers
Journal of Parallel and Distributed Computing - Special issue: 18th International parallel and distributed processing symposium
p2pDating: Real life inspired semantic overlay networks for Web search
Information Processing and Management: an International Journal
TPF: TCP Plugged File System for Efficient Data Delivery over TCP
IEEE Transactions on Computers
Web object-based storage management in proxy caches
Future Generation Computer Systems
Improving the performance of the web proxy server through group prefetching
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
An approach for indexing file names in a directory
Proceedings of the 13th International Conference on Computer Systems and Technologies
| Hi-index | 14.98 |
Web proxy caching servers play a key role in today's Web infrastructure. Previous studies have shown that disk I/O is one of the major performance bottlenecks of proxy servers. Most conventional file systems do not work well for proxy server workloads and have high overheads. This paper presents a novel, User-space, Customized File System, called UCFS, that can drastically improve the I/O performance of proxy servers. UCFS is a user-level software component of a proxy server which manages data on a raw disk or disk partition. Since the entire system runs in the user space, it is easy and inexpensive to implement. It also has good portability and maintainability. UCFS uses efficient in-memory meta-data tables to eliminate almost all I/O overhead of meta-data searches and updates. It also includes a novel file system called Cluster-structured File System (CFS). Similarly to the Log-structured File Systems (LFS), CFS uses large disk transfers to significantly improve disk write performance. However, CFS can also markedly improve file read operations and it does not generate garbage. Comprehensive simulation experiments using five representative real-world traces show that UCFS can significantly improve proxy server performance. For example, UCFS achieves 8-19 times better I/O performance than the state-of-the-art SQUID server running on a Unix Fast File System (FFS), 4-7.5 times better than SQUID on asynchronous FFS, and 3-9 times better than the improved SQUIDML.