DIGITAL CONTENT DISTRIBUTION UTILIZING DISPERSED STORAGE

• US 20110161781A1
• Filed: 10/13/2010
• Published: 06/30/2011
• Est. Priority Date: 12/29/2009
• Status: Active Grant

• Current Assignee: Pure Storage, Inc.
• Original Assignee: Cleversafe Incorporated (International Business Machines Corporation)
• Inventors: GRUBE, GARY W., RESCH, JASON K., DHUSE, GREG, MARKISON, TIMOTHY W., GLADWIN, S. CHRISTOPHER, ABHIJEET, KUMAR
• Granted Patent: US 8,352,831 B2
• Time in Patent Office: Days
• US Class Current: 714/760
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 2221/2129 Authenticate client device independently of the user
• CPC Class Codes: G06F 2221/2151 Time stamp
• CPC Class Codes: H04L 63/102 Entity profiles
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04N 21/2181 comprising remotely distributed storage units, e.g. when movies are replicated over a plurality of video servers distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: H04N 21/23116 involving data replication, e.g. over plural servers synchronization of replicated data G06F11/1658; error detection or correction by means of data replication G06F11/2053; replication in distributed file systems G06F16/10; replication in distributed file systems G06F16/27; replication or mirroring of data in data networks H04L67/1095
• 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 21/274 Storing end-user multimedia data in response to end-user request , e.g. network recorder

Abstract

A method begins by a processing module determining whether to error encode broadcast data. The method continues with the processing module encoding a portion of the broadcast data using an error coding storage dispersal function to produce a set of encoded broadcast data slices, determining whether to compress the set of encoded broadcast data slices for the set of encoded broadcast data slices, and when the set of encoded broadcast data slices is to be compressed, selecting a subset of encoded broadcast data slices of the set of encoded broadcast data slices, when the broadcast data is to be error encoded.

Claims

1. A method comprises:

determining whether to error encode broadcast data; and

when the broadcast data is to be error encoded;

encoding a portion of the broadcast data using an error coding dispersal storage function to produce a set of encoded broadcast data slices;

for the set of encoded broadcast data slices, determining whether to compress the set of encoded broadcast data slices; and

when the set of encoded broadcast data slices is to be compressed, selecting a subset of encoded broadcast data slices of the set of encoded broadcast data slices.

2. The method of claim 1 further comprises:

during a live broadcast of the broadcast data;

sending the subset of encoded broadcast data slices when the set of encoded broadcast data slices was compressed; and

sending the set of encoded broadcast data slices when the set of encoded broadcast data slices was not compressed.

3. The method of claim 1 further comprises:

sending the set of encoded broadcast data slices to a dispersed storage network (DSN) memory for storage therein.

4. The method of claim 3 further comprises:

during a playback of the broadcast data;

receiving a request from a playback device;

determining a retrieval pattern for the playback device;

retrieving a unique subset of the set of encoded broadcast data slices based on the retrieval pattern; and

sending the unique subset of the set of encoded broadcast data slices to the playback device.

5. The method of claim 1, wherein the determining whether to error encode the broadcast data is based on at least one of:

detecting new broadcast data content;

a predetermined schedule; and

a broadcast data request message.

6. A method comprises:

encoding, when enabled, broadcast data using an error coding dispersal storage function to produce a plurality of sets of encoded broadcast data slices;

storing the plurality of sets of encoded broadcast data slices in a dispersed storage network (DSN) memory;

receiving a playback request regarding the broadcast data from a playback device;

obtaining a unique retrieval matrix for the playback device;

retrieving the plurality of sets of encoded broadcast data slices from the DSN memory in accordance with the unique retrieval matrix to produce a plurality of unique sets of encoded broadcast data; and

sending the plurality of unique sets of encoded broadcast data to the playback device.

7. The method of claim 6, wherein the obtaining the unique retrieval matrix comprises at least one of:

retrieving the unique retrieval matrix from the DSN memory based on an identity of the playback device; and

generating the unique retrieval matrix based on one or more of;

the identity of the playback device;

the error coding dispersal storage function;

a data identifier;

a unique retrieval matrix associated with another playback device; and

a unique retrieval matrix functionality indicator.

8. The method of claim 6, wherein the unique retrieval matrix comprises one or more of:

a pillars list;

a segmenting protocol;

a pre-slice data manipulation function;

a forward error correction encoding function;

a slicing pillar width;

a post-slice data manipulation function;

a write threshold; and

a read threshold.

9. The method of claim 8, wherein the pillars list comprises one of:

a number of pillars, wherein the number is between, and including, a slicing pillar width number and a read threshold number.

10. A computer comprises:

an interface; and

a processing module operable to;

determine whether to error encode broadcast data; and

when the broadcast data is to be error encoded;

encode a portion of the broadcast data using an error coding dispersal storage function to produce a set of encoded broadcast data slices;

for the set of encoded broadcast data slices, determine whether to compress the set of encoded broadcast data slices; and

select a subset of encoded broadcast data slices of the set of encoded broadcast data slices when the set of encoded broadcast data slices is to be compressed.

11. The computer of claim 10, wherein the processing module further functions to:

during a live broadcast of the broadcast data;

send, via the interface, the subset of encoded broadcast data slices when the set of encoded broadcast data slices was compressed; and

send, via the interface, the set of encoded broadcast data slices when the set of encoded broadcast data slices was not compressed.

12. The computer of claim 10, wherein the processing module further functions to:

send, via the interface, the set of encoded broadcast data slices to a dispersed storage network (DSN) memory for storage therein.

13. The computer of claim 12, wherein the processing module further functions to:

during a playback of the broadcast data;

receive, via the interface, a request from a playback device;

determine a retrieval pattern for the playback device;

retrieve, via the interface, a unique subset of the set of encoded broadcast data slices based on the retrieval pattern; and

send, via the interface, the unique subset of the set of encoded broadcast data slices to the playback device.

14. The computer of claim 10, wherein the processing module further functions to determine whether to error encode the broadcast data based on at least one of:

detecting new broadcast data content;

a predetermined schedule; and

a broadcast data request message.

15. A computer comprises:

an interface; and

a processing module operable to;

encode, when enabled, broadcast data using an error coding dispersal storage function to produce a plurality of sets of encoded broadcast data slices;

store, via the interface, the plurality of sets of encoded broadcast data slices in a dispersed storage network (DSN) memory;

receive, via the interface, a playback request regarding the broadcast data from a playback device;

obtain a unique retrieval matrix for the playback device;

retrieve, via the interface, the plurality of sets of encoded broadcast data slices from the DSN memory in accordance with the unique retrieval matrix to produce a plurality of unique sets of encoded broadcast data; and

send, via the interface, the plurality of unique sets of encoded broadcast data to the playback device.

16. The computer of claim 15, wherein the processing module further functions to obtain the unique retrieval matrix by at least one of:

retrieving, via the interface, the unique retrieval matrix from the DSN memory based on an identity of the playback device; and

generating the unique retrieval matrix based on one or more of;

the identity of the playback device;

the error coding dispersal storage function;

a data identifier;

a unique retrieval matrix associated with another playback device; and

a unique retrieval matrix functionality indicator.

17. The computer of claim 15, wherein the unique retrieval matrix comprises one or more of:

a pillars list;

a segmenting protocol;

a pre-slice data manipulation function;

a forward error correction encoding function;

a slicing pillar width;

a post-slice data manipulation function;

a write threshold; and

a read threshold.

18. The computer of claim 17, wherein the pillars list comprises one of:

a number of pillars, wherein the number is between, and including, a slicing pillar width number and a read threshold number.