Emc IP Holding Company LLC

Shyam Burkule

Ramprasad N Chinthekindi

Kalidas Balakrishnan

Kalyan Chakravarthy Gunda

Subrahmanyam Josyula

Shuang Liang

Jayasekhar Konduru

Yiqiang Ding

A microservice or serverless process consistency check process comprising locating all the necessary metadata and data objects in the cloud by storing the data objects in the cloud and synchronously mirroring the metadata, which is separately stored in local storage, to the cloud. The process generates a list of data objects in the cloud as 'Set A' and the list of metadata objects in the same prefix range as the data objects as 'Set B.' The consistency check then verifies whether all objects in Set A are referred to by objects in set B. In the case where there are gaps between the sets, non-existent objects are marked as missing, and unreferenced objects are marked as orphan objects. The list of missing and orphan objects is then sent back to the backup server for analysis and further processing.

System and method for consistency checks in cloud object stores using microservices

Embodiments of method and system are directed to a best effort method to reconstruct the corrupt files from available nodes or tiers and heal or repair the corrupt files. The method looks for the existence of fingerprints of the lost segments in available tiers on the nodes or across nodes within a cluster. The method discovers the copies of these missing segments, creates an Lp tree referring these discovered segments and creates a virtual file in the namespace. The file is then moved to the destination tier where the corruption exists, thus healing the corruption.

Reconstructing lost data objects by generating virtual user files from available tiers within a node

Embodiments of method and system are directed to a best effort method to reconstruct corrupt files from available nodes or tiers and heal or repair the corrupt files within a cluster of nodes. The method looks for the existence of fingerprints of the lost segments in available tiers on the nodes or across nodes within a cluster. The method discovers the copies of these missing segments, creates an Lp tree referring these discovered segments and creates a virtual file in the namespace. The file is then moved to the destination tier where the corruption exists, thus healing the corruption.

Reconstructing lost data objects by generating virtual user files from available nodes within a cluster

A data storage device includes virtual storage devices, hosted by physical storage devices, and a processor. The processor obtains a data storage request, divides a file specified by the data storage request into blocks, and stores the blocks in the virtual storage devices based on an input output (IO) limitation of the virtual storage devices.

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Santa Clara, CA, United States of America

Shyam Burkule