ADAPTIVE QUIESCE FOR EFFICIENT CROSS-HOST CONSISTENT CDP CHECKPOINTS

摘要

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.

主权项

1. A method for generating cross-host consistent checkpoints for disaster recovery systems, comprising:
establishing a first time out period; transmitting write quiesce commands to each of a plurality of enterprise host computers, the write quiesce commands including the first timeout period, wherein each of the plurality of enterprise host computers are operative to write enterprise data to source datastores; receiving responses from each of the plurality of enterprise host computers, wherein each response indicates if a respective enterprise host computer has successfully stopped writing the enterprise data to the source datastores within the first time out period; and comparing a response time from each of the plurality of enterprise host computers to the first time out period; and determining a second time out period based on the responses from at least one of the plurality of enterprise host computers.