The Fellini Multimedia Storage Server

Martin, Cliff G.; Narayanan, P. S.; Özden, Banu; Rastogi, Rajeev; Silberschatz, Abraham

doi:10.1007/978-1-4613-1431-8_5

Cited by 63 publications

(24 citation statements)

References 2 publications

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“…Moreover, no design details are available. Multimedia storage servers provide guaranteed Quality of Service for reading and writing streaming media by implementing specialized data placement and request scheduling algorithms to provide those services [43].…”

Section: Specialized File Systemsmentioning

confidence: 99%

UCFS - a novel User-space, high performance, Customized File System for Web proxy servers

Wang

Min

Zhu

et al. 2002

IEEE Trans. Comput.

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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, Custom-made File System called UCFS that can drastically improve 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). Similar 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.

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Section: Specialized File Systemsmentioning

confidence: 99%

UCFS - a novel User-space, high performance, Customized File System for Web proxy servers

Wang

Min

Zhu

et al. 2002

IEEE Trans. Comput.

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“…In either case, simplifying assumptions are necessarily made (e.g., abstracting out control/signaling overhead, operating system issues such as the interaction between disk and CPU scheduling, multicast join/leave times, and more) to evaluate performance. While there are a number of existing production (e.g., Darwin, RealServer, Windows Media Server, Oracle Video Server) and experimental video server efforts [8][9][10][11][12][13][14][15][16][17][18], all of them use traditional unicast or multicast streaming.…”

Section: Introductionmentioning

confidence: 99%

Periodic broadcast and patching services - implementation, measurement and analysis in an internet streaming video testbed

et al. 2003

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Multimedia streaming applications can consume a significant amount of server and network resources. Periodic broadcast and patching are two approaches that use multicast transmission and client buffering in innovative ways to reduce server and network load, while at the same time allowing asynchronous access to multimedia streams by a large number of clients. Current research in this area has focussed primarily on the algorithmic aspects of these approaches, with evaluation performed via analysis or simulation. In this paper, we describe the design and implementation of a flexible streaming video server and client test bed that implements both periodic broadcast and patching, and explore the issues that arise when implementing these algorithms using laboratory and internet-based test beds. We present measurements detailing the overheads associated with the various server components (signaling, transmission schedule computation, data retrieval and transmission), the interactions between the various components of the architecture, and the overall end-to-end performance. We also discuss the importance of an appropriate server application-level caching policy for reducing the needed disk bandwidth at the server. We conclude with a discussion of the insights gained from our implementation and experimental evaluation.

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“…Among these are multimedia servers and certain database and scienti c computing applications that use external memory (out-of-core) algorithmic techniques to process massive data sets (e.g., 21,14,11]). In such applications, parallel I/O performance is often limited by the bus.…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimizing I/O throughput of multiple disks on a bus

Barve

Shriver²,

Gibbons³

et al. 1999

Proceedings of the 1999 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems

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In modern I/O architectures, multiple disk drives are attach e d t o e a c h I/O controller. A study of the performance of such a r c hitectures under I/O-intensive w orkloads has revealed a performance impairment that results from a p r eviously unknown form of convoy behavior in disk I/O. In this paper, we describe measurements of the read performance of multiple disks that share a SCSI bus under a heavy workload, and develop and validate formulas that accurately characterize the observed performance (to within 12% on several platforms for I/O sizes in the range 16{128 KB). Two terms in the formula clearly characterize the lost performance seen in our experiments. We describe techniques to deal with the performance impairment, via user-level workarounds that achieve greater overlap of bus transfers with disk seeks, and that increase the percentage of transfers that occur at the full bus bandwidth rather than at the lower bandwidth of a disk head. Experiments show bandwidth improvements of 10{20% when using these user-level techniques, but only in the case of large I/Os.

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The Fellini Multimedia Storage Server

Cited by 63 publications

References 2 publications

UCFS - a novel User-space, high performance, Customized File System for Web proxy servers

UCFS - a novel User-space, high performance, Customized File System for Web proxy servers

Periodic broadcast and patching services - implementation, measurement and analysis in an internet streaming video testbed

Modeling and optimizing I/O throughput of multiple disks on a bus

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