Computer file system using content-dependent file identifiers
DC CAFC
First Claim
Patent Images
1. A computer-implemented method operable in a file system comprising a plurality of servers, the method comprising the steps of:
- (A) adding a data item to the file system, the data item consisting of a sequence of non-overlapping parts, each part consisting of a corresponding sequence of bits, by;
(A1) for each part in said sequence of parts, determining, using hardware in combination with software, a corresponding digital part identifier, wherein each said digital part identifier for each said part is determined based at least in part on a first function of all of the bits in the sequence of bits comprising the corresponding part, the first function comprising a first hash function;
(A2) determining, using a second function, a digital identifier for the data item, said digital data item identifier being based, at least in part, on the contents of the data item, wherein two identical data items in the file system will have the same digital data item identifier in the file system, said second function comprising a second hash function;
(A3) storing each part in said sequence of parts on multiple servers of said plurality of servers in the file system;
(A4) storing first mapping data that maps the digital data item identifier of the data item to the digital part identifiers of the parts comprising the data item;
(A5) storing second mapping data that maps the digital part identifier of each part in said sequence of parts to corresponding location data that identifies which of the plurality of servers in the file system stores the corresponding part; and
(B) repeating step (A) for each of a plurality of data items; and
(C) attempting to access a particular data item in the file system by;
(C1) obtaining a particular digital data item identifier of the particular data item, said particular digital data item identifier of said particular data item being included in an attempt to access said particular data item in said file system;
(C2) attempting to match, using hardware in combination with software, said particular digital data item identifier of said particular data item with a digital data item identifier in said first mapping data; and
(C3) based at least in part on said attempting to match in step (C2), when said particular digital data item identifier obtained in step (C1) corresponds to an identifier in said first mapping data, using said first mapping data to determine a digital part identifier of each part comprising the particular data item;
(C4) using said second mapping data and at least one digital part identifier determined in step (C3) to determine location data that identifies which of the plurality of servers in the file system stores the corresponding at least one part of the particular data item;
(C5) attempting to access at least one part of the particular data item at one or more servers identified in step (C4) as storing said at least one part.
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1 Petition
Reexamination
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Abstract
A file system includes a plurality of servers to store file data as segments or chunks; and first data that includes file identifiers for files for which the file data are stored as segments; and second data that maps the file identifiers to the segments to which the file identifiers correspond; and location data that identifies which of the plurality of servers stores which of the segments, the location data being keyed on segment identifiers, each segment identifier being based on the data in a corresponding segment.
214 Citations
137 Claims
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1. A computer-implemented method operable in a file system comprising a plurality of servers, the method comprising the steps of:
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(A) adding a data item to the file system, the data item consisting of a sequence of non-overlapping parts, each part consisting of a corresponding sequence of bits, by; (A1) for each part in said sequence of parts, determining, using hardware in combination with software, a corresponding digital part identifier, wherein each said digital part identifier for each said part is determined based at least in part on a first function of all of the bits in the sequence of bits comprising the corresponding part, the first function comprising a first hash function; (A2) determining, using a second function, a digital identifier for the data item, said digital data item identifier being based, at least in part, on the contents of the data item, wherein two identical data items in the file system will have the same digital data item identifier in the file system, said second function comprising a second hash function; (A3) storing each part in said sequence of parts on multiple servers of said plurality of servers in the file system; (A4) storing first mapping data that maps the digital data item identifier of the data item to the digital part identifiers of the parts comprising the data item; (A5) storing second mapping data that maps the digital part identifier of each part in said sequence of parts to corresponding location data that identifies which of the plurality of servers in the file system stores the corresponding part; and (B) repeating step (A) for each of a plurality of data items; and (C) attempting to access a particular data item in the file system by; (C1) obtaining a particular digital data item identifier of the particular data item, said particular digital data item identifier of said particular data item being included in an attempt to access said particular data item in said file system; (C2) attempting to match, using hardware in combination with software, said particular digital data item identifier of said particular data item with a digital data item identifier in said first mapping data; and (C3) based at least in part on said attempting to match in step (C2), when said particular digital data item identifier obtained in step (C1) corresponds to an identifier in said first mapping data, using said first mapping data to determine a digital part identifier of each part comprising the particular data item; (C4) using said second mapping data and at least one digital part identifier determined in step (C3) to determine location data that identifies which of the plurality of servers in the file system stores the corresponding at least one part of the particular data item; (C5) attempting to access at least one part of the particular data item at one or more servers identified in step (C4) as storing said at least one part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 91)
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45. A computer-implemented method operable in a file system comprising (i) a plurality of servers, and (ii) a database, the method comprising the steps of:
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(A) adding a data item to the file system, said data item consisting of a first plurality of parts, wherein each part consists of a corresponding arbitrary sequence of bits, by; (A1) determining, using hardware in combination with software, for each part in said first plurality of parts, a corresponding digital part identifier, each said digital part identifier for each said part being determined based at least in part on a first given function of all of the bits in the sequence of bits comprising the corresponding part, wherein said first given function comprises a first hash function; (A2) determining a digital identifier for the data item, said digital data item identifier being based, at least in part, on a second given function of the data item, wherein two identical data items in the file system will have the same digital data item identifier in the file system as determined by said second given function, and wherein said second given function comprises a second hash function; (A3) replicating each of said first plurality of parts on multiple servers of said plurality of servers in the file system; (A4) storing first mapping data in said database to map the digital data item identifier of the data item to the digital part identifiers of the plurality of parts comprising the data item; (A5) storing second mapping data in said database to map the digital part identifier of each part of said first plurality of parts to corresponding location data that identify which of the plurality of servers in the file system store the corresponding part; and (B) attempting, using hardware in combination with software, to match a particular digital data item identifier of a particular data item with a digital identifier in the database, wherein said particular data item comprises a second plurality of parts; (C) based at least in part on said attempting to match in step (B), determining information corresponding said particular data item from said first mapping data in said database, said information comprising a corresponding digital part identifier for each of said second plurality of parts; and (D) determining, using the second mapping data in the database and the information determined in step (C), for at least one part of said particular data item, location data that identifies which of the plurality of servers in the file system stores the at least one part of the particular data item; and (E) using at least some of said location data determined in step (D) to access the at least one part of said particular data item in the file system. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 82)
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81. A computer-implemented method operable in a file system comprising (i) a plurality of servers;
- (ii) a database; and
(iii) at least one computer connected to the servers, the method comprising;obtaining, at said at least one computer, a first data item identifier for a first data item, said first data item consisting of a first plurality of non-overlapping segments, each of said segments consisting of a corresponding sequence of bits, and each of said segments being stored on multiple servers of said plurality of servers in the file system, said first data item identifier being based at least in part on the data comprising the first data item; and determining, using hardware in combination with software, at least one matching record in the database for the first data item based at least in part on the first data item identifier, the database comprising a plurality of records, where the records in the database correspond to data items, and where the records in the database include;
(i) first data that includes data item identifiers for data items for which the data are stored in the file system as segments; and
(ii) second data, keyed on data item identifiers, that maps the data item identifiers to the segments to which the data item identifiers correspond, and (iii) location data, keyed on segment identifiers, that identifies which of the plurality of servers in the file system stores which of the segments, each of said segment identifiers being based, at least in part, on a hash function of all of the data in a corresponding segment; andbased at least in part on said determining, accessing at least one segment of the first data item from at least one of the plurality of servers in the file system. - View Dependent Claims (92, 93, 94, 95, 96, 97, 98, 99)
- (ii) a database; and
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83. A computer-implemented method operable in a file system comprising (i) a plurality of servers to store file data as segments;
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(ii) first data that includes file identifiers for files for which the file data are stored as segments; and
(iii) second data that maps the file identifiers to the segments to which the file identifiers correspond; and
(iv) location data that identifies which of the plurality of servers stores which of the segments, the method comprising the steps of;(A) receiving a digital data item identifier, said digital data item identifier corresponding to a particular data item, said particular data item consisting of an arbitrary sequence of bits consisting of a first sequence of non-overlapping segments, each of said segments in said first sequence being stored on multiple servers of the plurality of servers in the file system, said digital data item identifier being based at least in part on a hash function of the data comprising the particular data item; (B) hardware in combination with software, attempting to match the digital data item identifier of the particular data item with a digital data item identifier in a database, said database comprising (i) said first data that includes file identifiers for files for which the file data are stored as segments; and
(ii) said second data that maps the file identifiers to the segments to which the file identifiers correspond, and (iii) said location data that identifies which of the plurality of servers stores which of the segments; and(C) based at least in part on said attempting to match in step (B), determining information corresponding to said particular data item, wherein said information corresponding to said particular data item data item includes at least location data that identifies which of the plurality of servers in the file system stores at least one of the segments in the first sequence of non-overlapping segments comprising said particular data item; and (D) using at least some of said location data determined in step (C) to access at least one of the segments of said particular data item in the file system. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90)
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100. A computer-implemented method operable in a file system comprising (i) a plurality of servers;
- (ii) first mapping data; and
(iii) second mapping data,wherein, for each of a plurality of data items in the file system, said data items each consisting of a corresponding sequence of one or more parts, each part in said sequence of parts having a corresponding digital part identifier, wherein each said part consists of a corresponding sequence of bits, and each said digital part identifier for each said part is based at least in part on a message digest function or hash function of the sequence of bits comprising the corresponding part; and wherein each data item has a corresponding digital data item identifier, said digital data item identifier for the data item being based, at least in part, on the contents of the data item, wherein two identical data items in the file system have the same digital data item identifier; and wherein each part is replicated on multiple servers of said plurality of servers; and wherein said first mapping data maps the digital data item identifier of a data item to the digital part identifiers of the parts comprising the data item; and wherein the second mapping data maps the digital part identifier of each part to corresponding location data that identifies which of the plurality of servers stores the corresponding part, the method comprising the steps of; (A1) obtaining a particular digital data item identifier of a particular data item, said particular digital data item identifier of said particular data item being included in an attempt to access said particular data item in said file system; (A2) attempting to match, using hardware in combination with software, said particular digital data item identifier of said particular data item with a digital data item identifier in said first mapping data; and (A3) based at least in part on said attempting to match in step (A2), when said particular digital data item identifier obtained in step (A1) corresponds to an identifier in said first mapping data, using said first mapping data to determine a digital part identifier of each part comprising the particular data item; (A4) using said second mapping data and at least one digital part identifier determined in step (A3) to determine location data that identifies which of the plurality of servers in the file system stores the corresponding at least one part of the particular data item; (A5) attempting to access at least one part of the particular data item at one or more servers identified in step (A4). - View Dependent Claims (101, 102)
- (ii) first mapping data; and
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103. A file system comprising:
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(i) a plurality of servers to store file data as segments; and (ii) first data that includes file identifiers for files for which the file data are stored as segments; and (iii) second data that maps the file identifiers to the segments to which the file identifiers correspond; and (iv) location data that identifies which of the plurality of servers stores which of the segments, said location data being keyed on segment identifiers, each segment identifier being based on all of the data in a corresponding segment; and (v) at least one computer comprising hardware in combination with software and connected to the plurality of servers, the at least one computer programmed; (A) to receive a digital data item identifier, said digital data item identifier corresponding to a particular data item, said particular data item consisting of an arbitrary sequence of bits consisting of a sequence of non-overlapping segments, each of said segments in said sequence being stored on multiple servers of the plurality of servers in the file system, said digital data item identifier being based at least in part on a given function of the data comprising the particular data item, said given function comprising a hash function; (B) to attempt to match the digital data item identifier of the particular data item with a digital data item identifier in a database, said database comprising (i) said first data that includes file identifiers for files for which the file data are stored as segments; and
(ii) said second data that maps the file identifiers to the segments to which the file identifiers correspond, and (iii) said location data that identifies which of the plurality of servers stores which of the segments; and(C) to determine, based at least in part on said attempt to match in (B), segment identifiers corresponding to the particular data item, each segment identifier being based on all of the data in a corresponding segment; (D) to determine, using at least one of the segment identifiers determined in (C), information corresponding to said particular data item, wherein said information corresponding to said particular data item data item includes at least location data that identifies which of the plurality of servers in the file system stores at least one of the segments in the sequence of non-overlapping segments comprising said particular data item; and (E) to use at least some of said location data determined in (D) to access at least one of the segments of said particular data item in the file system.
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104. A device comprising hardware including at least one processor and memory, said device operable in a file system,
wherein each file in the file system has a corresponding digital file identifier, each file in the file system consisting of a corresponding sequence of bits, and the corresponding digital file identifier for each file in the file system being based, at least in part, on given function of all of the bits of the file, said given function comprising a hash or message digest function, and wherein two identical files in the file system have the same digital file identifier as determined using said given function; - and
wherein the file system comprises a plurality of servers to store data as fixed-size chunks, and wherein each file in the file system consists of one or more non-overlapping chunks, each chunk having a corresponding digital chunk identifier, and wherein each chunk is replicated on multiple servers of said plurality of servers, said memory of the device storing at least; (i) first mapping data that maps each of a plurality of digital file identifiers of a plurality of files in the file system to one or more digital chunk identifiers of a corresponding one or more chunks comprising the corresponding file; and (ii) second mapping data that maps digital chunk identifiers of chunks stored on said plurality of servers to corresponding data identifying which of the plurality of servers stores the corresponding chunks, said device comprising software, in combination with said hardware; (A) to receive at said device a request regarding a particular file in the file system; (B) to determine, using the first mapping data and a particular digital file identifier corresponding to the particular file, one or more digital chunk identifiers for a corresponding one or more chunks of the particular file; (C) to determine, using said second mapping data and at least one chunk identifier of the one or more chunk identifiers determined in (B), data identifying which of the plurality of servers in the file system stores at least one of the chunks of the particular digital file; and (D) to provide at least some of said data determined in (C). - View Dependent Claims (105, 106, 107, 108, 109, 110, 111)
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112. A computer-implemented method, operable in a file system comprising (i) a plurality of servers to store file data as fixed-size chunks, and (ii) at least one computer distinct from said plurality of servers,
wherein each file in the file system has a corresponding digital file identifier, the digital file identifier for each file being based, at least in part, on given function of all of the bits of the file, said given function comprising a hash function, wherein two identical files in the file system have the same digital file identifier as determined by said given function; - and
wherein each file in the file system is divided into a corresponding one or more non-overlapping chunks, each chunk having a corresponding digital chunk identifier, and each chunk being replicated on multiple servers of said plurality of servers in said file system, and wherein said at least one computer has; (i) first mapping data that includes digital file identifiers for files in the file system for which the data are stored as one or more chunks, wherein said first mapping data maps digital file identifiers to one or more digital chunk identifiers of a corresponding one or more chunks comprising the corresponding files; and (ii) second mapping data that maps digital chunk identifiers to corresponding data identifying which of the plurality of servers stores the corresponding chunks, the method comprising; (A) receiving, at said at least one computer, and from another computer, a request regarding a particular file in the file system; and (B) responsive to said request; (b1) ascertaining one or more digital chunk identifiers for a corresponding one or more chunks of the particular file, said ascertaining using the first mapping data and a particular digital file identifier corresponding to the particular file, the particular digital file identifier being based, at least in part, on the given function of all of the bits of the particular file; (b2) determining which of the plurality of servers in the file system stores at least one of the chunks of the particular file, said determining using said second mapping data and at least one chunk identifier ascertained in (b1); and (b3) providing from said at least one computer to said other computer at least some information determined in (b2) identifying which of the plurality of servers in the file system stores at least one of the chunks of the particular file. - View Dependent Claims (113, 114, 115, 116, 117)
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118. A computer-implemented method operable in a data processing system, the method comprising the steps of:
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(A) adding a data item to the data processing system, the data item consisting of a sequence of non-overlapping parts, each part consisting of a corresponding arbitrary sequence of bits, by; (A1) for each part in said sequence of parts, determining, using hardware in combination with software, a corresponding digital part name, wherein each said digital part name for each said part is determined based at least in part on a first function of the corresponding part; (A2) determining, using a second function, a digital name for the data item, said digital data item name being based, at least in part, on the contents of the data item, wherein two identical data items in the data processing system will have the same digital data item name in the data processing system, said second function comprising a hash or message digest function; (A3) storing each part in said sequence of parts in multiple locations in the data processing system; (A4) storing first mapping data that maps the digital data item name of the data item to the digital part names of the parts comprising the data item; (A5) storing second mapping data that maps the digital part name of each part in said sequence of parts to corresponding location data that identifies which locations in the data processing system stores the corresponding part; and (B) repeating step (A) for each of a plurality of data items; and (C) attempting to access a particular data item in the data processing system by; (C1) obtaining a particular digital data item name of the particular data item, said particular digital data item name of said particular data item being included in an attempt to access said particular data item in said data processing system; (C2) attempting to match, using hardware in combination with software, said particular digital data item name of said particular data item with a digital data item name in said first mapping data; and (C3) based at least in part on said attempting to match in step (C2), when said particular digital data item name obtained in step (C1) corresponds to an name in said first mapping data, using said first mapping data to determine a digital part name of each part comprising the particular data item; (C4) using said second mapping data and at least one digital part name determined in step (C3) to determine location data that identifies which of the locations in the data processing system stores the corresponding at least one part of the particular data item; (C5) attempting to access at least one part of the particular data item at one or more locations identified in step (C4) as storing said at least one part. - View Dependent Claims (119, 120)
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121. A computer-implemented method operable in a data processing system comprising (i) a plurality of locations, and (ii) a database, the method comprising the steps of:
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(A) adding a data item to the data processing system, said data item consisting of a first plurality of parts, wherein each part consists of a corresponding arbitrary sequence of bits, by; (A1) determining, using hardware in combination with software, for each part in said first plurality of parts, a corresponding digital part name, each said digital part name for each said part being determined based at least in part on a first given function of the corresponding part; (A2) determining a digital data item name for the data item, said digital data item name being based, at least in part, on a second given function of the data item, wherein two identical data items in the data processing system will have the same digital data item name in the data processing system as determined by said second given function, and wherein said second given function comprises a hash or message digest function; (A3) replicating each of said first plurality of parts at multiple locations of said plurality of locations in the data processing system; (A4) storing first mapping data in said database to map the digital data item name of the data item to the digital part names of the plurality of parts comprising the data item; (A5) storing second mapping data in said database to map the digital part name of each part of said first plurality of parts to corresponding location data that identify which of the plurality of locations in the data processing system store the corresponding part; and (B) attempting, using hardware in combination with software, to match a particular digital data item name of a particular data item with a digital name in the database, wherein said particular data item comprises a second plurality of parts; (C) based at least in part on said attempting to match in step (B), determining information corresponding said particular data item from said first mapping data in said database, said information comprising a corresponding digital part name for each of said second plurality of parts; and (D) determining, using the second mapping data in the database and the information determined in step (C), for at least one part of said particular data item, location data that identifies which of the plurality of locations in the data processing system stores the at least one part of the particular data item; and (E) using at least some of said location data determined in step (D) to access the at least one part of said particular data item in the data processing system.
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122. A computer-implemented method operable in a data processing system comprising (i) a plurality of locations to store data item data as parts;
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(ii) first data that includes data item names for data items for which the data are stored as parts; and
(iii) second data that maps the data item names to the parts to which the data item names correspond; and
(iv) location data that identifies which of the plurality of locations stores which of the parts, the method comprising the steps of;(A) receiving a digital data item name, said digital data item name corresponding to a particular data item, said particular data item consisting of an arbitrary sequence of bits consisting of a first sequence of non-overlapping parts, each of said parts in said first sequence being stored at multiple locations of the plurality of locations in the data processing system, said digital data item name being based at least in part on a hash or message digest function of the data comprising the particular data item; (B) hardware in combination with software, attempting to match the digital data item name of the particular data item with a digital data item name in a database, said database comprising (i) said first data that includes data item names for files for which the data item data are stored as parts; and
(ii) said second data that maps the data item names to the parts to which the data item names correspond, and (iii) said location data that identifies which of the plurality of locations stores which of the parts; and(C) based at least in part on said attempting to match in (B), determining information corresponding to said particular data item, wherein said information corresponding to said particular data item data item includes at least location data that identifies which of the plurality of locations in the data processing system stores at least one of the parts in the first sequence of non-overlapping parts comprising said particular data item; and (D) using at least some of said location data determined in step (C) to access at least one of the parts of said particular data item in the data processing system. - View Dependent Claims (123, 124)
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125. A computer-implemented method operable in a data processing system comprising (i) a plurality of locations;
- (ii) a database; and
(iii) at least one processor connected to the locations, the method comprising;obtaining a first data item name for a first data item, said first data item consisting of a first plurality of non-overlapping parts, each of said parts consisting of a corresponding sequence of bits, and each of said parts being stored on multiple locations of said plurality of locations in the data processing system, said first data item name being based at least in part on a function of the data comprising the first data item; and determining, using hardware in combination with software, at least one matching record in the database for the first data item based at least in part on the first data item name, the database comprising a plurality of records, where the records in the database correspond to data items, and where the records in the database include;
(i) first data that includes data item names for data items for which the data are stored in the data processing system as parts; and
(ii) second data, keyed on data item names, that maps the data item names to the parts to which the data item names correspond, and (iii) location data, keyed on part names, that identifies which of the plurality of locations in the data processing system stores which of the parts; andbased at least in part on said determining, accessing at least one part of the first data item from at least one of the plurality of locations in the data processing system.
- (ii) a database; and
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126. A computer-implemented method operable in a data processing system comprising (i) a plurality of locations;
- (ii) first mapping data; and
(iii) second mapping data,wherein, for each of a plurality of data items in the data processing system, said data items each consisting of a corresponding sequence of one or more parts, each part in said sequence of parts having a corresponding digital part name; and wherein each data item has a corresponding digital data item name, said digital data item name for the data item being based, at least in part, on the contents of the data item, wherein two identical data items in the data processing system have the same digital data item name; and wherein each part is replicated on multiple locations of said plurality of locations in said data processing system; and wherein said first mapping data maps the digital data item name of a data item to the digital part names of the parts comprising the data item; and wherein the second mapping data maps the digital part name of each part to corresponding location data that identifies which of the plurality of locations stores the corresponding part, the method comprising the steps of; (A1) obtaining a particular digital data item name of a particular data item, said particular digital data item name of said particular data item having been included in an attempt to access said particular data item in said data processing system; (A2) attempting to match, using hardware in combination with software, said particular digital data item name of said particular data item with a digital data item name in said first mapping data; and (A3) based at least in part on said attempting to match in (A2), when said particular digital data item name obtained in (A1) corresponds to an name in said first mapping data, using said first mapping data to determine a digital part name of each part comprising the particular data item; (A4) using said second mapping data and at least one digital part name determined in (A3) to determine location data that identifies which of the plurality of locations in the data processing system stores the corresponding at least one part of the particular data item; (A5) attempting to access at least one part of the particular data item at one or more locations identified in (A4).
- (ii) first mapping data; and
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127. A data processing system comprising:
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(i) a plurality of locations to store data item data as parts; and (ii) first data that includes data item names for data items for which the data item data are stored as parts; and (iii) second data that maps the data item names to the parts to which the data item names correspond; and (iv) location data that identifies which of the plurality of locations stores which of the parts, said location data being keyed on part names, each part name being based on the data in a corresponding part; and (v) at least one computer comprising hardware in combination with software and connected to the plurality of locations, the at least one computer programmed; (A) to receive a digital data item name, said digital data item name corresponding to a particular data item, said particular data item consisting of an arbitrary sequence of bits consisting of a sequence of non-overlapping parts, each of said parts in said sequence being stored on multiple locations of the plurality of locations in the data processing system, said digital data item name being based at least in part on a given function of the data comprising the particular data item, said given function comprising a hash function; (B) to attempt to match the digital data item name of the particular data item with a digital data item name in a database, said database comprising (i) said first data that includes data item names for data items for which the data item data are stored as parts; and
(ii) said second data that maps the data item names to the parts to which the data item names correspond, and (iii) said location data that identifies which of the plurality of locations stores which of the parts; and(C) to determine, based at least in part on said attempt to match in (B), part names corresponding to the particular data item; (D) to determine, using at least one of the part names determined in (C), information corresponding to said particular data item, wherein said information corresponding to said particular data item data item includes at least location data that identifies which of the plurality of locations in the data processing system stores at least one of the parts in the sequence of non-overlapping parts comprising said particular data item; and (E) to use at least some of said location data determined in (D) to access at least one of the parts of said particular data item in the data processing system.
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128. A device comprising hardware including at least one processor and memory, said device operable in a data processing system,
wherein each data item in the data processing system has a corresponding digital data item name, each data item in the data processing system consisting of a corresponding sequence of bits, and the corresponding digital data item name for each data item in the data processing system being based, at least in part, on given function of all of the bits of the data item, said given function comprising a hash or message digest function, and wherein two identical data items in the data processing system have the same digital data item name as determined using said given function; - and
wherein the data processing system comprises a plurality of locations to store data as fixed-size pieces, and wherein each data item in the data processing system consists of one or more non-overlapping pieces, each piece having a corresponding digital piece name, and wherein each piece is replicated on multiple locations of said plurality of locations, said memory of the device storing at least; (i) first mapping data that maps each of a plurality of digital data item names of a plurality of data items in the data processing system to one or more digital piece names of a corresponding one or more pieces comprising the corresponding data item; and (ii) second mapping data that maps digital piece names of pieces stored on said plurality of locations to corresponding data identifying which of the plurality of locations stores the corresponding pieces, said device comprising software, in combination with said hardware; (A) to receive at said device a request regarding a particular data item in the data processing system; (B) to determine, using the first mapping data and a particular digital data item name corresponding to the particular data item, one or more digital piece names for a corresponding one or more pieces of the particular data item; (C) to determine, using said second mapping data and at least one piece name of the one or more piece names determined in (B), data identifying which of the plurality of locations in the data processing system stores at least one of the pieces of the particular digital data item; and (D) to provide at least some of said data determined in (C). - View Dependent Claims (129, 130, 131, 132)
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133. A computer-implemented method, operable in a data processing system comprising (i) a plurality of locations to store data item data as fixed-size pieces, and (ii) at least one computer distinct from said plurality of locations,
wherein each data item in the data processing system has a corresponding digital data item name, the digital data item name for each data item being based, at least in part, on given function of all of the bits of the data item, said given function comprising a hash function, wherein two identical data items in the data processing system have the same digital data item name as determined by said given function; - and
wherein each data item in the data processing system is divided into a corresponding one or more non-overlapping pieces, each piece having a corresponding digital piece name, and each piece being replicated at multiple locations of said plurality of locations in said data processing system, and wherein said at least one computer has; (i) first mapping data that includes digital data item names for data items in the data processing system for which the data are stored as one or more pieces, wherein said first mapping data maps digital data item names to one or more digital piece names of a corresponding one or more pieces comprising the corresponding data items; and (ii) second mapping data that maps digital piece names to corresponding data identifying which of the plurality of locations stores the corresponding one or more pieces, the method comprising; (A) receiving, at said at least one computer, and from another computer, a request regarding a particular data item in the data processing system; and (B) responsive to said request; (b1) ascertaining one or more digital piece names for a corresponding one or more pieces of the particular data item, said ascertaining using (i) the first mapping data, and (ii) a particular digital data item name corresponding to the particular data item, the particular digital data item name being based, at least in part, on the given function of all of the bits of the particular data item; (b2) determining which of the plurality of locations in the data processing system stores at least one of the one or more pieces of the particular data item, said determining using said second mapping data and at least one piece name ascertained in (b1); and (b3) providing from said at least one computer to said other computer at least some information determined in (b2) identifying which of the plurality of locations in the data processing system stores at least one of the one or more pieces of the particular data item. - View Dependent Claims (134, 135, 136, 137)
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Specification
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Litigation Data
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Current AssigneePersonalWeb Technologies, L.L.C.
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Original AssigneeKinetech, Inc. (Brilliant Digital Entertainment Incorporated), Level 3 Communications LLC (Lumen Technologies, Inc.)
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InventorsLachman, Ronald D., Farber, David A.
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Primary Examiner(s)Pham; Khanh B
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Application NumberUS11/980,677Publication NumberTime in Patent Office1,385 DaysField of Search707/690, 707/698, 707/699US Class Current707/698CPC Class CodesG06F 16/13 File access structures, e.g...G06F 16/164 File meta data generationG06F 16/174 Redundancy elimination perf...Y10S 707/914 VideoY10S 707/915 ImageY10S 707/916 AudioY10S 707/922 CommunicationsY10S 707/959 NetworkY10S 707/961 AssociativeY10S 707/966 DistributedY10S 707/99931 Database or file accessingY10S 707/99932 Access augmentation or opti...Y10S 707/99933 Query processing, i.e. sear...Y10S 707/99942 Manipulating data structure...
