Veritas Technologies LLC

Pritam Bankar

Shailesh Marathe

Sumit Dighe

Deodatta Barhate

Roshan Kolhe

The disclosed computer-implemented method for switching replication modes in a volume replication system may include (i) in response to deciding to switch from a synchronous replication mode of a volume replication system to an asynchronous replication mode, changing, by a computing device, to the asynchronous replication mode, (ii) associating a new write request to write data to storage, (iii) determining, based on metadata of the existing write request, that the existing write request was issued in the synchronous replication mode, (iv) in response to determining that the existing write request was issued in the synchronous replication mode, processing the existing write request via the synchronous replication, and (v) processing the new write request via the asynchronous replication based on the metadata of the new write request. Various other methods, systems, and computer-readable media are also disclosed.

Systems and methods for switching replication modes in a volume replication system

The disclosed computer-implemented method for selecting a set of storage nodes from a plurality of storage nodes for use in reconstructing data on a faulted node in an erasure-coded system may include determining an average read access latency for a first set of storage nodes, detecting a storage failure a storage node, selecting a subset of the first set of storage nodes, such that the average read access latency for each of the storage nodes within the subset has a lower average read access latency than at least one other node (or as many as all the other nodes) of the available storage nodes, and reconstructing data that was stored on the failed storage node from the subset of the first set of storage nodes. During reconstruction, each of the nodes multiplies their data chunk by a coefficient and transmits the resulting product to an initiator node.

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Pune, India

Pritam Bankar