Pure Storage, Inc.

International Business Machines Corporation

Gregory Palinckx

Jason K Resch

Greg R Dhuse

Andrew D Baptist

S Christopher Gladwin

Thomas Franklin Shirley, Jr

Niall John McShane

Russell Paul Kennedy

Robert Clark McCammon

James Sherer

A processing system of a storage network operates by receiving a write request associated with a data object; identifying dispersed storage error encoding parameters; and determining a number of available storage units. When the number of available storage units is determined to exceed a first number, the processing system operates by: determining a first write threshold number in accordance with the dispersed storage error encoding parameters; dispersed error encoding the data object to produce a first write threshold number of encoded data slices; and writing, to available storage units, the first write threshold number of encoded data slices. When the number of available storage units is determined to not exceed the first number, the processing system operates by: determining a second write threshold number in accordance with the dispersed storage error encoding parameters associated, wherein the second write threshold number is less than the first write threshold number; dispersed error encoding the data object to produce a second write threshold number of encoded data slices; and writing, to the available storage units, the second write threshold number of encoded data slices.

Facilitating write requests in a storage network

A method for execution by a dispersed storage and task (DST) processing unit that includes a processor includes determining to access a set of storage units; identifying an information dispersal algorithm (IDA) width and a decode threshold number associated with the set of storage units; determining a number of available storage units of the set of storage units; determining a write threshold number and a read threshold number based on the number of available storage units and in accordance with a consistency approach; and accessing at least some of the available storage units utilizing at least one of the write and read threshold numbers.

Facilitating data consistency in a dispersed storage network

A method begins by a requesting entity sending a normal data segment access request to first and second groups of storage units of a dispersed storage network. The method continues with the requesting entity sending a group failure data segment access request to the first group of storage units when the second group of storage units has less than a decode threshold number of encoded data slices of a set of encoded data slices available. When the second group of storage units has reestablished that the at least the decode threshold number of encoded data slices is available, the method continues with the requesting entity sending a re-integration data segment write request to the first and second groups of storage units and sending a re-integration data segment read request to the first group of storage units.

Consistency based access of data in a dispersed storage network

Growing community of inventors

Cherry Hills Village, CO, United States of America

Gregory Palinckx