摘要:
A method begins by a set of storage units of a dispersed storage network (DSN) storing a plurality of encoded data slices, where each storage unit stores a unique sub-set of encoded data slices. The method continues with each storage unit dispersed storage error encoding at least a recovery threshold number of encoded data slices to produce a local set of encoded recovery data slices. In response to a retrieval request, the method continues with a device identifying a storage unit of an initial recovery number of storage units having a rebuilding issue and determining whether the rebuilding issue is correctable at a DSN level. When the rebuilding issue is correctable at the DSN level the method continues with the device selecting another storage unit to replace the storage unit to produce a recovery number of storage units and sending retrieve requests to the recovery number of storage units.
摘要:
A method for evolving dispersed storage network (DSN) memory in a DSN begins by a processing module generating tracking information by tracking evolutionary change of storage units of the DSN memory, performance and reliability requirements of the DSN memory, and memory utilization of the DSN memory. The method continues with the processing module, for a given state of evolution of the DSN memory, interpreting the tracking information to produce given state DSN memory data and establishing virtual DSN address boundaries for a set of the storage units for storing data objects in a virtual memory vault of the DSN, where the virtual memory vault is mapped to the set of the storage units, where the data objects are dispersed storage error encoded into pluralities of sets of encoded data slices that are stored in the set of the storage units in accordance with the virtual DSN address boundaries.
摘要:
A method begins by a dispersed storage (DS) processing module receiving data from a plurality of sources and queuing the data for storage in a dispersed storage network (DSN). The method continues with the DS processing module utilizing temporary dispersed storage error encoding parameters for efficient and reliable error encoded temporary storage of the data in the DSN. For a data object of the data temporarily stored in the DSN, the method continues with the DS processing module determining non-temporary storage parameters for the data object, retrieving first encoded data slices regarding the data object from the DSN, reconstructing the data object from the first encoded data slices in accordance with the temporary dispersed storage error encoding parameters, encoding the reconstructed data object in accordance with the non-temporary storage parameters for the data object to produce second encoded data slices, and storing the second encoded data slices in the DSN.
摘要:
A method begins by a processing module storing a set of encoded data slices in storage units. A data segment of data is encoded, in accordance with dispersed storage error encoding parameters, to produce the set of encoded data slices. The dispersed storage error encoding parameters include a decode threshold number and a pillar width number, which is at least twice the decode threshold number. The method continues with the processing module processing a first request for retrieval of the data segment by retrieving a first sub-set of encoded data slices, which includes the decode threshold number, and decoding them to produce a first recovered data segment. The method continues with the processing module processing a second request for retrieval of the data segment by retrieving a second sub-set of encoded data slices, which includes the decode threshold number, and decoding them to produce a second recovered data segment.
摘要:
A method with a computer generating a first set of access requests regarding a first set of encoded data slices and storage units of a dispersed storage network. A first data segment is encoded into the first set of encoded data slices. The method continues with the computer generating a second set of access requests regarding a second set of encoded data slices and the storage units. A second data segment is encoded into the second set of encoded data slices. The method continues with the computer grouping the first set of access requests and the second set of access requests to produce a set of combined requests. The method continues with the computer sending the set of combined requests to the storage units.
摘要:
A method begins with a processing module obtaining data to store and determining whether substantially similar data to the data is stored. When the substantially similar data is not stored, the method continues with the processing module generating a first encryption key based on the data, encoding the first encryption key into encoded data slices in accordance with an error coding dispersal storage function, and storing the encoded data slices in a dispersed storage network (DSN) memory. The method continues with the processing module encrypting the data using an encryption key of the substantially similar data in accordance with an encryption function to produce encrypted data, compressing the encrypted data in accordance with a compression function to produce compressed data, storing the compressed data when the substantially similar data is stored.
摘要:
A method begins by a dispersed storage (DS) processing module receiving data objects from a plurality of authorized users and determining a system level storage efficiency preference for a data object. The method continues with the DS processing module selecting a set of storage nodes of an on-line media storage system based on the system level storage efficiency preference and determining dispersed storage error encoding parameters. The method continues with the DS processing module encoding the data object in accordance with the dispersed storage error encoding parameters to produce encoded data slices and generating system addressing information. The method continues with the DS processing module storing the encoded data slices in the set of storage nodes using the system addressing information and updating a user profile for the authorized user to include the system addressing information.
摘要:
A method begins by a dispersed storage (DS) processing module transmitting a set of write commands for storing a set of encoded data slices in storage units of a dispersed storage network (DSN) and determining whether at least a first threshold number of write responses have been received within a response time period. When the at least the first threshold number of the write responses have been received within the response time period, the method continues with the DS processing module determining whether a total number of responses have been received within another response time period. When the total number of responses have not been received within the other response time period, the method continues with the DS processing module issuing a sub-set of write commit commands corresponding to a response number of encoded data slices for which a response was received.
摘要:
A data object interface to a dispersed data storage network is disclosed. The disclosed interface accepts read and write commands from a client computer and generates network commands that are forwarded to slice servers that form the storage component of the dispersed data storage network. The slice servers then fulfill the read and write commands.
摘要:
A method begins by a processing module sending a transaction verification request to the set of dispersed storage (DS) units, wherein the transaction verification request includes a transaction number that corresponds to a particular dispersed storage network (DSN) access request. The method continues with the processing module receiving transaction verification responses from at least some of the set of DS units to produce received transaction verification responses. The method continues with the processing module identifying an undesired condition with processing the DSN access request and initiating a corrective remedy for the undesired condition when a DS unit of the set of DS units does not provide a desired transaction verification response.