Media server system and process having device independent near-online storage support

• US 6,601,136 B2
• Filed: 10/22/2001
• Issued: 07/29/2003
• Est. Priority Date: 10/30/1998
• Status: Expired due to Term

• Current Assignee: Espial Incorporated (Enghouse Systems Limited)
• Original Assignee: Kasenna, Inc. (Enghouse Systems Limited)
• Inventors: Lauris, Eliahu, Gunaseelan, Lakshminarayanan
• Primary Examiner(s): Yoo, Do Hyun
• Assistant Examiner(s): Peugh, Brian R.
• Application Number:
  US10/037,756
• Publication Number:
  US 20020152364A1
• Time in Patent Office: 645 Days
• Field of Search: 711/112, 711/111, 711/114, 711/169, 709/208, 709/213, 709/217, 709/219, 709/231
• US Class Current: 711/112
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04N 21/21825 involving removable storage units, e.g. tertiary storage such as magnetic tapes or optical disks
• CPC Class Codes: H04N 21/23106 involving caching operations prefetching while addressing of a memory level in which the access to the desired data or data block requires associative addressing means within memory systems or architectures G06F12/0862; caching at an intermediate stage in a data network H04L67/568
• CPC Class Codes: H04N 21/2312 Data placement on disk arrays data placement in general G06F3/0604
• CPC Class Codes: H04N 21/232 Content retrieval operation locally within server, e.g. reading video streams from disk arrays storage management G06F3/0604; details of querying and searching of video data from a database G06F16/739
• CPC Class Codes: H04N 7/17336 Handling of requests in head-ends

Abstract

A media server system and process are disclosed that have device independent near-online storage support. A plurality of media assets are stored in online storage, and a plurality of media assets are stored on tertiary storage devices in tertiary storage to provide near-online storage. A media server, having access to the online storage and the tertiary storage, receives a user request for a media asset. The media server then determines whether the requested media asset needs to be loaded from the tertiary storage. If so, the media server allocates space in the online storage for the requested media asset. A transfer process specific to the tertiary storage devices is then used to transfer content of the requested media asset to the online storage.

Claims

1. A media server system having online storage storing a plurality of media assets, tertiary storage storing a plurality of media assets on tertiary storage devices to provide near-online storage, a media server having access to the online storage and the tertiary storage, the media server operating to receive a user request for a media asset, determine whether the requested media asset needs to be loaded from the tertiary storage, if so, to allocate storage space in the online storage for the requested media asset before transferring content specific to the tertiary storage devices to transfer content of the requested media asset to the online storage, the media server system comprising:

a storage manager that allocates bandwidth on the online storage for transfer of the requested media asset from tertiary storage to online storage, wherein bandwidth allocation comprises allocation for timing-dependent applications including a video content delivery applications timing requirement;

an application program interface, the application program interface including a UNIX file path interface that accesses media assets stored on the tertiary storage devices independent of vendor specific device drivers;

a plurality of transfer services specific to the tertiary storage devices that transfer the requested media asset to the application program interface;

state information associated with the requested media asset the state information protecting the integrity of the requested media asset by indicating that the requested media asset is being transferred and preventing the modification or deletion of the requested media asset, the state information also indicating that the requested media asset is online once it has been transferred from tertiary storage to online storage; and

a pipe data structure created by the transfer service of the tertiary device for transferring content from tertiary storage to online storage, the pipe comprising a first in first out queue that has a read end and a write end, the pipe data structure providing a way to use either the device independent application program interface or one of the device-specific plurality of transfer services to perform the transfer.

2. A media server system according to claim 1, wherein said online storage comprises hard disk storage.

3. A media server system according to claim 1, wherein said tertiary storage devices comprise magnetic tape devices.

4. A media server system according to claim 1, wherein said allocating storage space comprises finding a victim media asset and purging the victim media asset.

5. A media server system according to claim 4, wherein said allocating space further comprises setting a state of the victim media asset to an offline state.

6. A media server system according to claim 4, wherein said victim asset comprises a least recently loaded media asset having backup storage in said tertiary storage.

7. A media server system according to claim 4, wherein said victim asset comprises a least frequently requested media asset having backup storage in said tertiary storage.

8. A media server system according to claim 1, wherein said tertiary storage devices comprise CD-ROM devices and said tertiary storage comprises a CD-ROM jukebox.

9. A media server system having online storage storing a plurality of media assets, tertiary storage storing a plurality of media assets on tertiary storage devices to provide near-online storage, a media server having access to the online storage and the tertiary storage, the media server operating to receive a user request for a media asset, determine whether the requested media asset needs to be loaded from the tertiary storage, if so, to allocate storage space in the online storage for the requested media asset before transferring content specific to the tertiary storage devices to transfer content of the requested media asset to the online storage, the media server system comprising:

a storage manager that allocates bandwidth on the online storage for transfer of the requested media asset from tertiary storage to online storage, wherein bandwidth allocation comprises allocation for timing-dependent applications including a video content delivery applications timing requirement;

an application program interface, the application program including a UNIX file path interface that access media assets stored on the tertiary storage devices independent of vendor specific device drivers;

a plurality of transfer services specific to the tertiary storage devices that transfer the requested media asset to the application program interface;

state information associated with the requested media asset, the state information protecting the integrity of the requested media asset by indicating that the requested media asset is being transferred and preventing the modification of deletion of the requested media asset, the state information also indicating that the requested media asset is online once it has been transferred from tertiary storage to online storage;

a pipe data structure created by the transfer service of the tertiary device for transferring content from tertiary storage to online storage, the pipe comprising a first in first out queue that has a read end and a write end, the pipe data structure providing a way to use either the device independent application program interface or one of the device-specific plurality of transfers services to perform the transfer,

the online storage comprises hard disc storage and the media server further operates to allocate disk bandwidth in the online storage prior to transferring content and to perform asset finalization for the requested media asset after transfer of the content, the asset finalization comprises updating a state of the requested media asset to an online state;

the transfer process is specific to a vendor of the tertiary storage device; and

allocating space compromises finding a victim media asset and purging the victim media asset and setting a state of the victim media asset to and offline state, and the victim asset comprises a least recently loaded media asset having backup storage in the tertiary storage.

10. A media server system according to claim 9, wherein said online storage comprises hard disk storage.

11. A media server system according to claim 9, wherein said tertiary storage devices comprise magnetic tape devices.

12. A media server system having online storage storing a plurality of media assets, tertiary storage storing a plurality of media assets on tertiary storage devices to provide near-online storage, a media server having access to the online storage end the tertiary storage, the media server operating to receive a user request for a media asset determine whether the requested media asset needs to be loaded from the tertiary storage, if so, to allocate storage space in the online storage for the requested media asset before transferring content specific to the tertiary storage devices to transfer content of the requested media asset to the online storage, the media server system comprising:

a storage manager that allocates bandwidth on the online storage for transfer of the requested media asset from tertiary storage to online storage, wherein bandwidth allocation comprises allocation for timing-dependent applications including a video content delivery applications timing requirement;

an application program interface, the application program interface including a UNIX file path interface that accesses media assets stored on the tertiary storage devices independent of vendor specific device drivers;

a plurality of transfer services specific to the tertiary storage devices that transfer the requested media asset to the application program interface;

state information associated with the requested media asset, the state information protecting the integrity of the requested media asset by indicating that the requested media asset is being transferred and preventing the modification or deletion of the requested media asset, the state information also indicating that the requested media asset is online once it has been transferred from tertiary storage to online storage;

a pipe data structure created by the transfer service of the tertiary device for transferring content from tertiary storage to online storage, the pipe comprising a first in first out queue that has a read end and a write end, the pipe data structure providing a way to use either the device independent application program interface or one of the device-specific plurality of transfer services to perform the transfer;

the online storage comprises hard disk storage and the media server further operates to allocate disk bandwidth in the online storage prior to transferring content and to perform asset finalization for the requested media asset after transfer of the content, the asset finalization comprises updating a state of the requested media asset to an online state;

the transfer process is specific to a vendor of the tertiary device; and

allocating space comprises finding a victim media asset and purging the victim media asset and setting a state of the victim media asset to an offline state, and the victim asset comprises a least frequently requested media asset having backup storage in the tertiary storage.

13. A media server system according to claim 12, wherein said online storage comprises hard disk storage.

14. A media server system according to claim 12, wherein said tertiary storage devices comprise magnetic taps devices.