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Proceedings Paper

Wide-area-distributed disaster-tolerant file system for multimedia data storage
Author(s): Setsuko Murata; Shigetaro Iwatsu; Masahiro Ueno; Nobuyoshi Izawa; Katsunori Ishii
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Paper Abstract

We propose a new disaster-tolerant file system for multimedia data storage. To protect against natural disasters by eliminating the possibility of simultaneous failure in multiple disks constituting a RAID (redundant array of inexpensive disks) system, our proposed file system features a RAID system with member disks spatially distributed over a wide area. The Fiber Channel standard has the potential to create an up to 10-km separation of member disks by using single-mode optical fiber cables. The prototype system of wide-area distributed file (WDF) consisting of a layered structure of RAID level 1 and RAID level 0 was tested. It has its entire data in a local disk and its mirroring data striped into two fiber-channel-connected disks by using optical fiber cables. The effect of underlying software modules and hardware components on its read/write performance was investigated. Compared with a file system using a local disk, the prototype WDF system shows equivalent read performance by directing all reads to its local disk and its write performance is almost 20$% lower. An on-line transaction processing (OLTP) benchmark was also executed. The WDF system achieved a throughput (transactions per second) similar to that of the file system using a local disk.

Paper Details

Date Published: 23 December 1997
PDF: 9 pages
Proc. SPIE 3312, Storage and Retrieval for Image and Video Databases VI, (23 December 1997); doi: 10.1117/12.298466
Show Author Affiliations
Setsuko Murata, NTT Integrated Information and Energy Systems Labs. (Japan)
Shigetaro Iwatsu, NTT Integrated Information and Energy Systems Labs. (Japan)
Masahiro Ueno, NTT Integrated Information and Energy Systems Labs. (Japan)
Nobuyoshi Izawa, NTT Integrated Information and Energy Systems Labs. (Japan)
Katsunori Ishii, NTT Business Communications Headquarters (Japan)


Published in SPIE Proceedings Vol. 3312:
Storage and Retrieval for Image and Video Databases VI
Ishwar K. Sethi; Ramesh C. Jain, Editor(s)

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