Abstract: A method includes identifying an existing logical storage vault having existing dispersed storage coding properties for vault transformation, where a first set of storage units support the existing logical storage vault, and a data object of first data objects stored within the first set of storage units is stored as a first plurality of sets of encoded data slices in accordance with the existing dispersed storage coding properties. The method includes identifying a new logical storage vault having new dispersed storage coding properties, wherein storage units support the new logical storage vault. The method includes transforming the first data objects from being in accordance with the existing dispersed storage coding properties to being in accordance with the new dispersed storage coding properties to produce transformed first data objects. The method includes storing the transformed first data objects in the new logical storage vault supported by the storage units.

Abstract: A method includes storing, for each of a plurality of records of a dataset, values corresponding to a first subset of a plurality of fields of the dataset via a first storage mechanism. Values corresponding to a second subset of the plurality of fields are stored vis second storage mechanism that is different from the first storage mechanism based on a data type corresponding to the second subset of the plurality of fields. Execution of a query is facilitated by accessing, via the first storage mechanism, values of a first field included in the first subset of the plurality of fields, and by further accessing, via the second storage mechanism, values of a second field included in the second subset of the plurality of fields. A query resultant for the query is generated based on the values of the first field and the values of the second field.

Abstract: A method for execution by a node of a database system includes receiving a first data block, determining data block processing instruction data for the first data block is not indicated in previously received data blocks, and adding the first data block to an unknown purpose data block cache. Prior to elapsing of a storage time window for storage of the first data block, at least one second data block is received that indicates data block processing instruction data for the first data block. The first data block is processed by applying the data block processing instruction data. A third data block is received and is added to the unknown purpose data block cache. The third data block is removed from the unknown purpose data block cache based on elapsing of a storage time window for storage of the third data block.

Abstract: A method for execution by a database system includes determining physical network topology data of a plurality of nodes of the database system utilized to facilitate query executions. Initial route selection data indicating a set of initial relay nodes for each of a plurality of pairs of the plurality of nodes is based on the physical network topology data by selecting one of a plurality of possible initial route options for the each of the plurality of pairs of the plurality of nodes. The initial route selection data is sent to the plurality of nodes. A query resultant is generated by facilitating execution of a query, via the plurality of nodes, by facilitating routing of data blocks between at least one of the plurality of pairs of the plurality of nodes via a set of intermediate nodes selected based on the initial route selection data in accordance with a dynamic data block routing scheme.

Abstract: A method for execution by a query processing system includes receiving a query request that indicates a query for execution by a database system. A plurality of query execution mode options for execution of the query via the database system can be determined. A plurality of execution success conditions corresponding to the plurality of query execution mode options can be determined. A plurality of resultant correctness guarantee data corresponding to the plurality of query execution mode options based on the plurality of execution success conditions can be generated. Query execution mode selection data can be generated by selecting a query execution mode from the plurality of query execution mode options based having resultant correctness guarantee data that compares favorably to determined resultant correctness requirement data. A resultant for the query can be generated by facilitating execution of the query in accordance with the selected execution mode.

Abstract: A computing device includes an interface configured to interface and communicate with a dispersed storage network (DSN), a memory that stores operational instructions, and processing circuitry operably coupled to the interface and to the memory. The computing device obtains a data identifier associated with a data object and determines DSN address(es) associated with storage of one or more encoded data slice(s) (EDS(s)). The computing device selects slice names based on the DSN address(es) and issues at least a read threshold number of read slice requests using slice names to at least some storage units (SUs). When an insufficient number of EDSs is received, the computing device issues an alternate read slice request to an alternate SU. When a sufficient number of EDSs is received from the alternate SU and the computing device has received at least the read threshold number of EDSs, the computing device reconstructs the data segment.

Abstract: A method includes determining, by a computing device of a storage network, a storage inconsistency exists for a set of encoded data slices based on an indicator of a difference list, where the difference list is regarding storage of the set of encoded data slices within a set of storage units of the storage network and where a data segment is error encoded into the set of encoded data slices. The method further includes determining a storage resolution of a plurality of storage resolutions for the storage inconsistency based on the one or more indicators. The method further includes facilitating the storage resolution to resolve the storage inconsistency for the set of encoded data slices.

Abstract: A method begins by receiving data to be distributedly stored in a storage network and continues by determining a decode threshold value for storage of the data, wherein the data is to be distributedly stored in the storage network. The method continues by determining a preferred encoded data slice size for storage of the data, where the preferred encoded data slice size is based on a minimum performance level requirement and based on the preferred encoded data slice size and the decode threshold value the method continues by determining a preferred segment size for the data. The method then continues by determining a segmentation scheme for the data based on the preferred segment size for the data and segmenting the data into a plurality of data segments in accordance with the segmentation scheme. The method then continues by determining dispersed error encoding parameters for encoding each data segment and encoding each data segment to produce a set of error encoded data slices.

Abstract: A method begins with a processing module obtaining a data object from a user and identifying a plurality of virtual storage vaults (VSVs) for storage of the data object. The method continues with the processing module determining dispersal error encoding parameters associated with a first virtual storage vault and error encoding the data object in accordance with those dispersal error encoding parameters to produce a corresponding plurality of sets of encoded data slices (EDSs), issuing write slice requests for the EDSs and receiving EDS information from at least some of the plurality of VSVs. When the EDS information indicates that a threshold number of VSVs have successfully stored the plurality of sets of encoded data slices within a synchronization timeframe, the method continues with the processing module issuing a favorable response to the user, or when a threshold number of VSVs have not successfully stored the plurality of sets of encoded data slices initiating a retry process.

Abstract: A method for execution by storage network begins by identifying a subset of encoded data slices stored in a set of storage units for enhanced access and interpreting registry data to determine a listing type. The method continues by generating listing slice names for the subset of encoded data slices based on the listing type and sending the listing slice names to the set of storage units, where each storage unit updating storage and/or listing of at least some of the subset of encoded data slices associated with the storage unit based on the listing type and each storage unit issuing slice access information to a requesting entity in response to one or more slice access requests in accordance with the listing type for some of the subset of encoded data slices and the requesting entity receiving slice access information from at least some of the set of storage units.

Abstract: A method for execution by a node in a database system includes determining to send a data block from a node to a destination node of a database system in accordance with execution of a query. An initial route to the destination node that includes a predefined number of relay nodes in a sequential relay ordering is determined. The second relay node in the sequential relay ordering is identified, and a set of intermediate node options that are each capable of receiving data from the node via a direct connection and capable of sending data to the second relay node via a direct connection is identified. One intermediate node is selected from the set of intermediate node options, and the data block is transmitted from the node to the one intermediate node to facilitate sending of the data to the destination node via exactly the predefined number of relay nodes.

Abstract: A method includes receiving a set of difference lists from a set of storage units of the DSN, where the set of storage units store a plurality of sets of encoded data slices, wherein a first difference list identifies first encoded data slices that have first indicators that are different than corresponding first indicators of the first encoded data slices included in a shared common list. The method continues by determining, for a set of encoded data slices of the plurality of sets of encoded data slices, whether a storage inconsistency exists based on one or more indicators associated with the encoded data slice included in the set of difference lists. When the storage inconsistency exists, the method continues by flagging for rebuilding encoded data slices of the set of encoded data slices associated with the storage inconsistency.

Abstract: Methods and systems for use in a dispersed storage network to prioritize data rebuilding operations. In various examples, a device receives data loss information from a set of storage units. Based on the data loss information, data slice errors are detected regarding data stored by the storage units, and corresponding rebuild requests are issued to the storage units. The device also determines a rebuild rate based on a rate of rebuilding associated with the rebuild requests. The device further receives storage error information regarding errors associated with storage requests to the storage units and, based on the data loss information and storage error information, determines a data loss rate. The rebuild rate and the data loss rate are provided to the storage units for use in prioritizing the rebuild requests, such that when the rebuild rate compares unfavorably to the data loss rate, rebuild requests are prioritized over storage requests.

Abstract: A method for execution in a storage network begins by generating a set of query requests for each data segment of a plurality of data segments that includes a corresponding set of slice identifiers of a plurality of sets of slice identifiers, where each slice identifier of the corresponding set of slice identifiers includes a pillar index based on a vault affiliated with the plurality of data segments. The method continues by transmitting the set of query requests to a set of storage units affiliated with the storage network, receiving a plurality of sets of query responses from the storage units, obtaining a data identifier for slice location identification and generating a storage record that includes the data identifier and an identity of the set of storage units. The method then continues by facilitating migration of at least some encoded data slices associated with the plurality of sets of slice identifiers when the storage record compares unfavorably to a storage record requirement.

Abstract: A method for execution by a query processing system includes receiving a query request that indicates a query for execution by a database system. A plurality of query execution mode options for execution of the query via the database system can be determined. A plurality of execution success conditions corresponding to the plurality of query execution mode options can be determined. A plurality of resultant correctness guarantee data corresponding to the plurality of query execution mode options based on the plurality of execution success conditions can be generated. Query execution mode selection data can be generated by selecting a query execution mode from the plurality of query execution mode options based having resultant correctness guarantee data that compares favorably to determined resultant correctness requirement data. A resultant for the query can be generated by facilitating execution of the query in accordance with the selected execution mode.

Abstract: A query processing system operates by determining a set of query rules, receiving a query from a requesting entity, and generating compliance data by determining whether the query complies with the set of query rules prior to an execution of the query. When the compliance data indicates the query complies with the set of query rules: generating a query result by facilitating the execution of the query against a database system; and transmitting the query result to the requesting entity. When the compliance data indicates the query does not comply with the set of query rules: foregoing facilitation of the execution of the query.

Abstract: A query processing system operates by determining a query pricing scheme; receiving a query request from a requesting entity that indicates access to a subset of a plurality of records in a database system; generating query cost data based on the subset of the plurality of records by utilizing the query pricing scheme; and transmitting the query cost data to the requesting entity.

Abstract: A method for execution by a query processing system includes determining a query request that indicates a plurality of operators, where the plurality of operators includes at least one relational algebra operator and further includes at least one non-relational operator. A query operator execution flow is generated from the query request that indicates a serialized ordering of the plurality of operators. A query resultant of the query is generated by facilitating execution of the query via a set of nodes of a database system that each perform a plurality of operator executions in accordance with the query operator execution flow, where a subset of the set of nodes each execute at least one operator execution corresponding to the at least one non-relational operator in accordance with the execution of the query.

Abstract: A method for execution by a node in a database system includes determining to send a data block from a node to a destination node of a database system in accordance with execution of a query. An initial route to the destination node that includes a predefined number of relay nodes in a sequential relay ordering is determined. The second relay node in the sequential relay ordering is identified, and a set of intermediate node options that are each capable of receiving data from the node via a direct connection and capable of sending data to the second relay node via a direct connection is identified. One intermediate node is selected from the set of intermediate node options, and the data block is transmitted from the node to the one intermediate node to facilitate sending of the data to the destination node via exactly the predefined number of relay nodes.

Abstract: A method for execution by a temporary ingress storage system includes receiving a set of records to be processed for long-term storage. The set of records are temporarily stored in a set of memory resources of the temporary ingress storage system during a first temporal period. Execution of a query is facilitated by accessing a subset of the set of records from at least one memory resource of the set of memory resources during the first temporal period. The set of records are processed to generate a set of segments for long-term storage. Migration of the set of records from the temporary ingress storage system to a long-term storage system for during a second temporal period that begins after the first temporal period has elapsed by sending the set of records to the long-term storage system.