RECONCILIATION IN SYNC REPLICATION
First Claim
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1. A method comprising:
- receiving, by a first node, a first request to write data to a first storage unit coupled to the first node;
replicating the first request to a second node as a replicated first request, wherein the replicated first request causes the second node to perform a second write operation to write the data to a second storage unit coupled to the second node;
receiving a second request to abort the first request;
performing a first abort operation on the first node based upon the second request;
forwarding the second request to the second node to invoke the second node to perform a second abort operation; and
performing a reconciliation operation based upon results of the first abort operation and the second abort operation.
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Abstract
A distributed storage system replicates data for a primary logical storage object on a primary node of the storage system to a secondary logical storage object on a secondary node on the distributed storage system. Failures in writing data to the primary logical storage object or failures in the replication of the data to the secondary logical storage object can cause data that should be synchronized to become divergent. In cases where the data may be divergent, reconciliation operations can be performed to resynchronize the data.
1 Citation
20 Claims
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1. A method comprising:
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receiving, by a first node, a first request to write data to a first storage unit coupled to the first node; replicating the first request to a second node as a replicated first request, wherein the replicated first request causes the second node to perform a second write operation to write the data to a second storage unit coupled to the second node; receiving a second request to abort the first request; performing a first abort operation on the first node based upon the second request; forwarding the second request to the second node to invoke the second node to perform a second abort operation; and performing a reconciliation operation based upon results of the first abort operation and the second abort operation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory machine readable medium having stored thereon instructions for performing a method comprising program code which when executed by a machine, causes the machine to:
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receive a first request to write data to a first storage unit coupled to a first node; replicate the first request to a second node as a replicated first request, wherein the replicated first request causes the second node to perform a second write operation to write the data to a second storage unit coupled to the second node; receive a second request to abort the first request; perform a first abort operation on the first node based upon the second request; forward the second request to the second node to invoke the second node to perform a second abort operation; and perform a reconciliation operation based upon results of the first abort operation and the second abort operation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A device comprising:
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a memory containing machine readable medium comprising program code having stored thereon instructions for performing a method; and a processor coupled to the memory, the processor configured to execute the program code to cause the processor to; receive a first request to write data to a first storage unit coupled to a first node; replicate the first request to a second node as a replicated first request, wherein the replicated first request causes the second node to perform a second write operation to write the data to a second storage unit coupled to the second node; receive a second request to abort the first request; perform a first abort operation on the first node based upon the second request; forward the second request to the second node to invoke the second node to perform a second abort operation; and perform a reconciliation operation based upon results of the first abort operation and the second abort operation. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification