公开(公告)号：DE69514176T2

公开(公告)日：2000-06-21

申请号：DE69514176

申请日：1995-07-10

Applicant: IBM

Inventor： DAN ASIT ,  SITARAM DINKAR

IPC: G06F3/06 ,  G06F12/00 ,  G06F13/00 ,  G11B20/12 ,  H04N7/173 ,  H04N21/472

Abstract: A placement system and method wherein the placement of programs such as movies, audio programs, audio-visual programs and similar types of data, is determined as a function of the bandwidth-space ratio (BSR) of each disk in the system. The BSR of a disk is defined as the bandwidth of the disk divided by the space. The BSR of the programs on the disk is the total expected demand for the programs divided by the space required to store the programs. In a preferred embodiment, a Video Placement Manager (a software task operating under a server's main control program) places the programs on the disks so as to best match the BSR of movies stored on the disk and the BSR of the disk, thus minimizing the waste of both disk bandwidth and disk space.

公开(公告)号：DE69504551T2

公开(公告)日：1999-05-27

申请号：DE69504551

申请日：1995-03-13

Applicant: IBM

Inventor： DAN ASIT ,  SHAHABUDDIN NAYYAR PERWEZ ,  SITARAM DINKAR

IPC: G06F12/00 ,  G06F13/00 ,  G11B20/10 ,  H04N5/765 ,  H04N5/93 ,  H04N7/173 ,  H04N21/472 ,  H04N7/00

Abstract: An integrated scheduling approach that provides VCR control functions to clients without always requiring a separate video stream for all clients. When a client invokes a resume, following a pause, the system uses a hierarchy of methods to handle the request. If an ongoing video stream is available such that the point at which the client is paused will be reached by that stream within a tolerable delay, the client is assigned to the ongoing stream. If no such stream is available, and the client request can not be served from a buffer, the system assigns the client to a reserve stream taken from a pool of reserved server capacity. If no reserved server capacity is available, the client is given priority for assignment to the next stream to become available.

公开(公告)号：CA2142381A1

公开(公告)日：1995-09-16

申请号：CA2142381

申请日：1995-02-13

Applicant: IBM

Inventor： DAN ASIT ,  SHAHABUDDIN NAYYAR P ,  SITARAM DINKAR

IPC: G06F12/00 ,  G06F13/00 ,  G11B20/10 ,  H04N5/765 ,  H04N5/93 ,  H04N7/173 ,  H04N21/472

Abstract: An integrated scheduling approach that provides VCR control functions to clients without always requiring a separate video stream for all clients. When a client invokes a resume, following a pause, the system uses a hierarchy of methods to handle the request. If an ongoing video stream is available such that the point at which the client is paused will be reached by that stream within a tolerable delay, the client is assigned to the ongoing stream. If no such stream is available, and the client request can not be served from a buffer, the system assigns the client to a reserve stream taken from a pool of reserved server capacity. If no reserved server capacity is available, the client is given priority for assignment to the next stream to become available.

公开(公告)号：CA2142380A1

公开(公告)日：1995-09-02

申请号：CA2142380

申请日：1995-02-13

Applicant: IBM

Inventor： DAN ASIT ,  SITARAM DINKAR

IPC: G06F12/08 ,  G06F3/06 ,  H04N7/173 ,  G11B20/10

Abstract: A method for reducing the disk bandwidth capacity required by a multimedia server by selectively retaining blocks that have already been read in by one stream for re-use by another. Due to stream-dependent block buffering, the storage requirement is less than that for whole-movie buffering and because the policy is dynamic, it also adapts rapidly to changing access patterns.