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US 9,003,138 B1Granted
Read signature command
AssigneeEMC Corporation
InventorsAssaf Natanzon, Dennis T. Duprey, Karl M. Owen, Leehod Baruch, Jehuda Shemer
Life of this patent
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Abstract
A method, system, and computer program product for providing a first site the ability to execute a read signature command, wherein the read signature command takes a set of arguments, wherein at least one of the arguments corresponds to at least a portion of the first storage medium, and returns a signature value for the at least a portion of the storage medium.
Claims23
A system for data replication, the system comprising:
- a first site, the first site comprising a first storage medium;
- and
- computer-executable logic operating in memory, wherein the computer-executable program logic is configured for execution of:
- providing the first site the ability to execute a read signature command, wherein the read signature command takes a set of arguments, wherein at least one of the arguments corresponds to at least a portion of the first storage medium, and returns a signature value for the at least a portion of the storage medium;
- storing a read signature value for at least a portion of the storage medium;
- upon execution of the read signature command, returning a stored signature value corresponding to a calculated return value;
- and
- invalidating the stored read signature value upon a write to the data stored at the at least a portion of the first storage medium.
5 more elements
A computer implemented method for use data replication, the method comprising:
- providing a first site the ability to execute a read signature command, wherein the read signature command takes a set of arguments, wherein at least one of the arguments corresponds to at least a portion of the first storage medium, and returns a signature value for the at least a portion of the storage medium;
- storing a read signature value for at least a portion of the storage medium;
- upon execution of the read signature command, returning a stored signature value corresponding to a calculated return value;
- and
- invalidating the stored read signature value upon a write to the data stored at the at least a portion of the first storage medium.
2 more elements
A computer program product for use in replication for comprising:
- a non-transitory computer readable medium encoded with computer executable program code for using read signatures in replication, the code configured to enable the execution of:
- providing a first site the ability to execute a read signature command, wherein the read signature command takes a set of arguments, wherein at least one of the arguments corresponds to at least a portion of the first storage medium, and returns a signature value for the at least a portion of the storage medium;
- storing a read signature value for at least a portion of the storage medium;
- upon execution of the read signature command, returning a stored signature value corresponding to a calculated return value;
- and
- invalidating the stored read signature value upon a write to the data stored at the at least a portion of the first storage medium.
3 more elements
Dependencies are inferred from the claim text.