On-line tape backup using an integrated cached disk array
US5829046A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Jun 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/312
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video file server includes an integrated cached disk array storage subsystem and a plurality of stream server computers linking the cached disk array to a data network for the transfer of video data streams. The video file server further includes a controller server for applying an admission control policy to client requests and assigning stream servers to service the client requests. The stream servers include a real-time scheduler for scheduling isochronous tasks, and supports at least one industry standard network file access protocol and one file access protocol for continuous media file access. The cached disk storage subsystem is responsive to video prefetch commands, and the data specified for a prefetch command for a process are retained in an allocated portion of the cache memory from the time that the cached disk storage subsystem has responded to the prefetch command to the time that the cached disk storage subsystem responds to a fetch command specifying the data for the process. The time between prefetching and fetching is selected based on available disk and cache resources. The video file server provides video-on-demand service by maintaining and dynamically alloca…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.