VALIDATING STORED ENCODED DATA SLICE INTEGRITY IN A DISPERSED STORAGE NETWORK

摘要

An encoded data slice is received for storage by a dispersed storage and task (DST) execution unit. A plurality of initial integrity values are generated by executing a plurality of integrity check algorithms on the encoded data slice. The encoded data slice and the plurality of initial integrity values are stored in a memory of the DST execution unit. A subset of the plurality of integrity check algorithms are selected in response to a request to retrieve the encoded data slice. At least one final integrity value is generated by executing the subset of the plurality of integrity check algorithms on the encoded data slice stored in memory. An integrity status is generated by comparing the at least one final integrity value to the corresponding subset of the plurality of initial integrity values.

主权项

1. A method for execution by a dispersed storage and task (DST) execution unit that includes a processor, the method comprises:
receiving an encoded data slice for storage by the DST execution unit; generating a plurality of initial integrity values by executing a plurality of integrity check algorithms on the encoded data slice; storing the encoded data slice and the plurality of initial integrity values in a memory of the DST execution unit; selecting a subset of the plurality of integrity check algorithms in response to a request to retrieve the encoded data slice; generating at least one final integrity value by executing the subset of the plurality of integrity check algorithms on the encoded data slice stored in memory; and generating an integrity status by comparing the at least one final integrity value to the corresponding subset of the plurality of initial integrity values.