Emc IP Holding Company LLC

Joey C Lei

Mark D Malamut

Adam E Brenner

Arun Murti

One example method includes receiving from a node, in an HSAN that includes multiple nodes, an ADD_DATA request to add an entry to a distributed ledger of the HSAN, the request comprising a user ID that identifies the node, a hash of a data segment, and a storage location of the data segment at the node, performing a challenge-and-response process with the node to verify that the node has a copy of the data that was the subject of the entry, making a determination that a replication factor X has not been met, and adding the entry to the distributed ledger upon successful conclusion of the challenge-and-response process.

Hyper-scale P2P deduplicated storage system using a distributed ledger

One example method includes defining object groups by classifying each object in a backup saveset based on respective object types of the objects such that all objects in an object group are the same object type, assigning a different respective storage media type to each of the object groups, storing each object group at a respective storage target, representing each object group with a respective Merkle tree that includes a base hash, and mapping each base hash to the storage target where the object group associated with the Merkle tree that includes the base hash is stored.

Automatically determining optimal storage medium based on source data characteristics

One example method includes receiving, from an entity, a proposed entry for a ledger, where the ledger is shared and accessible by multiple users and includes a whitelist and a blacklist, determining, or assigning, a credibility score and rate limiter value for the entity, comparing the credibility score and rate limiter value with respective credibility score and rate limiter value thresholds, determining that the credibility score and rate limiter value meet or exceed the respective credibility score and rate limiter value thresholds, and submitting the proposed entry to the ledger.

Data integrity and consensuses with blockchain

One example method includes receiving a group of files, two or more of the files being of different respective file types, creating a backup saveset that includes the group of files, classifying each of the files in the backup saveset based in part on the respective file types of the files, assigning a respective storage media type to each of the classified files in the backup saveset, and transmitting the backup saveset to a storage site.

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Irvine, CA, United States of America

Joey C Lei