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AssigneeSymantec Operating Corporation
InventorsGopal Sharma, Oleg Kiselev, Santosh Shankar Rao
Estimating the term…
Systems, methods, apparatus and software can make use of separated I/O processors and strategy processors (implemented in hardware and/or software) to perform virtual device I/O operations. I/O processors operating on cluster nodes, storage appliance ports, or other devices can receive I/O operation requests directed to virtual devices, e.g., volumes or virtual logical units. Information about the request is forwarded to a strategy processor, operating independently or as part of larger volume management software where corresponding physical device I/O operations are determined. The physical device I/O operations can include additional information about the operations, e.g., tag information and summary information, for use in processing the virtual device I/O request. The physical device I/O operations are sent back to the I/O processor which executes the operations and/or passes the operation on to the appropriate storage device. I/O completion messages are sent by the I/O processor in parallel to the source of the I/O request (e.g., a host or application) and to the strategy processor, providing an improvement in I/O latency.
A method implemented in a computer system, comprising:
A computer system comprising:
A computer program product, comprising a computer readable medium storing a plurality of instructions, wherein said instructions, when executed by a processor of a computer system, are configured to cause said processor to:
Dependencies are inferred from the claim text.