Adaptive quiesce for efficient cross-host consistent CDP checkpoints
First Claim
1. A method for generating cross-host consistent checkpoints for disaster recovery systems, comprising:
- transmitting a write quiesce command to each of a plurality of enterprise host computers, the write quiesce command including a timeout period, wherein each of the plurality of enterprise host computers are operative to write enterprise data to source datastores;
receiving a response from each of the plurality of enterprise host computers, wherein each response indicates whether or not a respective enterprise host computer has successfully stopped writing enterprise data to the source datastores within the timeout period;
determining a response time for each of the plurality of enterprise host computers; and
identifying a longest response time from the plurality of enterprise host computers.
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Accused Products
Abstract
A disaster recovery system, including a target datastore for replicating data written to source datastores, and a checkpoint engine (i) for transmitting, at multiple times, quiesce commands to a plurality of host computers, each quiesce command including a timeout period that is adjusted at each of the multiple times, (ii) for determining, at each of the multiple times, whether acknowledgements indicating that a host has successfully stopped writing enterprise data to the source datastores, have been received from each of the host computers within the timeout period, (iii) for marking, at each of the multiple times, a cross-host checkpoint in the target datastore and reducing the timeout period for the quiesce commands at the next time, if the determining is affirmative, and (iv) for increasing, at each of the multiple times, the timeout period for the quiesce commands transmitted at the next time, if the determining is not affirmative.
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Citations
20 Claims
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1. A method for generating cross-host consistent checkpoints for disaster recovery systems, comprising:
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transmitting a write quiesce command to each of a plurality of enterprise host computers, the write quiesce command including a timeout period, wherein each of the plurality of enterprise host computers are operative to write enterprise data to source datastores; receiving a response from each of the plurality of enterprise host computers, wherein each response indicates whether or not a respective enterprise host computer has successfully stopped writing enterprise data to the source datastores within the timeout period; determining a response time for each of the plurality of enterprise host computers; and identifying a longest response time from the plurality of enterprise host computers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A disaster recovery system for providing continuous data protection to an enterprise, the enterprise comprising a plurality of host computers operative to read enterprise data from source datastores and write enterprise data to source datastores, comprising:
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a target datastore configured to replicate data written to the source datastores; and a checkpoint engine configured to; transmit a write quiesce command having a timeout period to each of a plurality of enterprise host computers, wherein each of the plurality of enterprise host computers are operative to write enterprise data to source datastores; receive a response from at least one of the plurality of enterprise host computers, wherein each response indicates if a respective enterprise host computer has successfully stopped writing enterprise data to the source datastores within the timeout period; determine a response time for each of the plurality of enterprise host computers; and identify a longest response time from the plurality of enterprise host computers. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification