Highly autonomous dispersed storage system retrieval method
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United States of America Patent
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Nov 24, 2015
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app pub date -
May 29, 2014
filing date -
Oct 30, 2009
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Abstract
A method for accessing data in a directory-less dispersed storage (DS) network. In various embodiments, the method begins when a DS processing unit receives a read request for data stored in accordance with a dispersed storage error encoding function. Estimated storage metadata is determined based on the identity of the data, the identity of the requesting unit, and data storage preferences of the requesting unit. The estimated storage metadata is used to determine a target set of storage units. Next, a retrieval request is sent to one or more storage units of the target set. If a favorable response is received (e.g., a read threshold number of storage units return encoded data slices), the data is decoded and forwarded to the requestor. Otherwise, the storage metadata is re-estimated and used to determine a second target set of storage units for solicitation. This process continues until a favorable response is received.
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