摘要:
A method begins by a processing module determining whether a memory device of a dispersed storage (DS) unit is unavailable to produce an unavailable memory device. The method continues with the processing module determining a methodology regarding DS encoded data stored in the unavailable memory device based on one or more dispersed storage network (DSN) conditions to produce a determined methodology when the memory device is unavailable. The method continues with the processing module initiating, in accordance with the determined methodology, a rebuilding function to rebuild the DS encoded data to produce rebuilt DS encoded data when the determined methodology includes a rebuilding component. The method continues with the processing module storing the rebuilt DS encoded data within available memory of the DS unit.
摘要:
A dispersed storage network includes a dispersed storage device to store data. The dispersed storage device includes a processing module operable to slice a data segment of a data object into data slices. The processing module further creates a slice name for each of the data slices. The slice name includes routing information containing a vault identifier that identifies a vault associated with the data object, in which the vault identifies at least one user. The slice name further includes a source data name containing an identifier of the data object.
摘要:
A method begins by a processing module identifying a memory loading mismatch between a first memory device and a second memory device of a dispersed storage unit, wherein the first memory device is assigned a first range of slice names and the second memory device is assigned a second range of slice names. The method continues with the processing module determining an estimated impact to reduce the memory loading mismatch and when the estimated impact compares favorably to an impact threshold, modifying the first and second ranges of slices names to produce a first modified range of slice names for the first memory device and a second modified range of slice names for the second memory device based on the memory loading mismatch and transferring one or more encoded data slices between the first and second memory devices in accordance with the first and second modified ranges of slice names.
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:
An integrated client computer for accessing a dispersed data storage network is disclosed. A client program operating on the client computer accepts commands from a user and in response, issues network messages to a plurality of slice servers implementing a dispersed data storage network. Data slices can be read, written or modified using the disclosed integrated client computer.
摘要:
A dispersed storage device within a dispersed storage network includes a processing module for determining whether to add a new generation for a vault, in which the vault identifies at least one user having data to be stored. When the new generation is to be added to the vault, the processing module further assigns a vault generation identifier to the new generation, assigns a virtual address range of a virtual memory associated with the dispersed storage network to the new generation and maps the virtual address range to a physical memory for storage of the data therein.
摘要:
A dispersed storage network includes a dispersed storage device to store data. The dispersed storage device includes a processing module operable to slice a data segment of a data object into data slices, in which the number of data slices corresponds to a number of pillars for storing the data object. The processing module further creates a slice name for each of the data slices. The slice name includes routing information containing a vault identifier that identifies at least one user of the data object and a slice index based on the vault identifier and a pillar identifier that identifies a pillar associated with the data slice. In addition, the slice name includes a source data name containing an identifier of the data object.
摘要:
A method begins by a processing module storing a plurality of encoded data slices in a plurality of memory devices of a dispersed storage (DS) unit of a dispersed storage network (DSN) memory using a quantity load balancing function to substantially balance a quantity of encoded data slices stored within each of the plurality of memory devices, wherein data size of at least some of the plurality of encoded data slices is different. The method continues with the processing module determining whether an available memory imbalance exists between a first memory device of the plurality of memory devices and a second memory device of the plurality of memory devices. The method continues with the processing module migrating one or more encoded data slices between the first and second memory devices to reduce the available memory imbalance when the available memory imbalance exists.
摘要:
A method begins by a processing module storing a plurality of encoded data slices in a plurality of memory devices of a dispersed storage (DS) unit of a dispersed storage network (DSN) memory using a quantity load balancing function to substantially balance a quantity of encoded data slices stored within each of the plurality of memory devices, wherein data size of at least some of the plurality of encoded data slices is different. The method continues with the processing module determining whether an available memory imbalance exists between a first memory device of the plurality of memory devices and a second memory device of the plurality of memory devices. The method continues with the processing module migrating one or more encoded data slices between the first and second memory devices to reduce the available memory imbalance when the available memory imbalance exists.
摘要:
A distributed storage network includes a distributed storage processing unit, which generates multiple data slices from a single data segment, and multiple different storage units to store the data slices. Each data slice is assigned to a particular storage unit for storage. The distributed storage processing unit determines which of the storage units are in a ready state, and sends data slices to the ready storage units. Data slices assigned to storage units that are not in a ready state are temporarily stored in a temporary memory, e.g. cache memory, until the storage unit becomes ready. If the intended storage unit remains in a non-ready status for too long, the slices stored in cache memory can be sent to a substitute storage unit, or discarded and reconstructed at a later time.