摘要:
Multiple revisions of an encoded data slice are generated, with each revision having the same slice name. Each of the data slices represents the same original data portion, but each is encoded so that no single data slice can be used to reconstruct the original data portion. Appropriate revision numbers are associated with each encoded data slice, and the encoded data slices and associated revision numbers are transmitted for storage in selected storage units of a distributed storage network. If write confirmations are received from at least a write threshold number of storage units, a commit command is transmitted so that the most recently written data slices will be available for access. After a commit command is issued, a current directory used to access the encoded data slices can be sliced, encoded, and stored in the same way as the data slices.
摘要:
A method begins by a processing module dispersed storage error encoding a data segment to produce a set of encoded data slices and dispersed storage error encoding metadata associated with the data segment to produce a set of encoded metadata slices. The method continues with the processing module creating a set of data slice names for the set of encoded data slices and creating a set of metadata slice names based on the set of data slice names. The method continues with the processing module sending the set of encoded data slices and the set of data slice names to a dispersed storage network (DSN) memory for storage therein. The method continues with the processing module sending the set of encoded metadata slices and the set of metadata slice names to the DSN memory for storage therein.
摘要:
A method begins by a processing module detecting a potential dispersed storage network (DSN) protocol issue that effects access of dispersed storage error encoded data within a DSN. The method continues with the processing module identifying a DSN entity based on the DSN protocol issue and generating a DSN protocol inquiry frame. The method continues with the processing module transmitting the DSN protocol inquiry frame to the DSN entity. The method continues with the processing module receiving a DSN protocol response frame from the DSN entity and resolving the DSN protocol issue based on the DSN protocol response frame.
摘要:
A method begins by a processing module generating a payload of a dispersed storage network frame by generating a transaction number field including a transaction number and generating one or more slice payload sections, wherein each slice payload section includes a slice name field to include a slice name corresponding to an encoded data slice, a last known slice revision numbering field including a last known revision number of the slice name, a new slice revision numbering field including a new revision number of the slice name, a slice length field including a length of the encoded data slice, and a slice payload field including the encoded data slice. The method continues with the processing module generating a protocol header including a payload length field and remaining fields of the protocol header.
摘要:
A method begins by a processing module generating a payload section of a dispersed storage network (DSN) frame regarding a read request operation by generating one or more slice name fields of the payload section to include one or more slice names corresponding to one or more encoded data slices and generating a transaction number field of the payload section to include a transaction number corresponding to the read request operation. The method continues with the processing module generating a protocol header of the DSN frame by generating a payload length field of the protocol header to include a payload length that represents a length of the payload section and generating remaining fields of the protocol header.
摘要:
A distributed storage network (DSN) includes a user device and a plurality of DSN memories, wherein each of the DSN memories includes a plurality of storage units. The user device includes at least one network interface to the plurality of DSN memories and at least one processing module that is operable to determine one of the plurality of DSN memories for storing a data object based on a comparison of one or more storage requirements of the data object and one or more DSN attributes of the plurality of DSN memories.
摘要:
A method begins by a processing module generating a payload section of a dispersed storage network (DSN) frame regarding a read request operation by generating one or more slice name fields of the payload section to include one or more slice names corresponding to one or more encoded data slices and generating a transaction number field of the payload section to include a transaction number corresponding to the read request operation. The method continues with the processing module generating a protocol header of the DSN frame by generating a payload length field of the protocol header to include a payload length that represents a length of the payload section and generating remaining fields of the protocol header.
摘要:
A method begins by a processing module identifying an encoded data slice to be rebuilt, selecting a decode threshold number of dispersed storage (DS) units of a storage set of DS units, generating a decode threshold number of key pairs, wherein a key pair of the decode threshold number of key pairs corresponds to a DS unit of the decode threshold number of DS units, and sending partial rebuilding requests to the decode threshold number of DS units, wherein a partial rebuilding request of the partial rebuilding requests includes the key pair. The method continues with the processing module receiving encrypted partial encoded data slices, wherein an encrypted partial encoded data slice received from the corresponding DS unit includes a multiple encryption, using the key pair, of a partial encoded data slice and decoding the encrypted partial encoded data slices to rebuild the encoded data slice.
摘要:
A method begins by a dispersed storage (DS) processing module of a DS unit selecting a data slice for corruption analysis and requesting integrity information for the data slice from one or more other DS units of a dispersed storage network. When the one or more requested integrity information is received, the method continues with the DS processing module analyzing the one or more received integrity information and local integrity information of the data slice stored in the DS unit. When the analysis of the one or more received integrity information and the local integrity information of the data slice is unfavorable, the method continues with the DS processing module identifying the data slice as being corrupted.
摘要:
A distributed storage network (DSN) includes a user device and a plurality of DSN memories, wherein each of the DSN memories includes a plurality of storage units. The user device includes at least one network interface to the plurality of DSN memories and at least one processing module that is operable to determine one of the plurality of DSN memories for storing a data object based on a comparison of one or more storage requirements of the data object and one or more DSN attributes of the plurality of DSN memories.