Storage array snapshots for logged access replication in a continuous data protection system
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United States of America Patent
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Apr 26, 2016
Grant Date -
Apr 25, 2013
app pub date -
Nov 26, 2012
filing date -
Sep 29, 2010
priority date (Note) -
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Abstract
In one aspect, a method includes providing a continuous data protection system comprising a data protection appliance, a splitter and source volumes on a source side that are replicated to target volumes of a storage array on a target side by using a journal of write transactions; and enabling, in an image access mode, a rolling back of the target volumes on the target side from a first point in time to a selected point in time so that the target volumes contain data for the selected point in time. The selected point in time is earlier than the first point in time and the rolling back includes undoing write transactions in the journal subsequent to the selected point in time; enabling generation of a virtual snapshot of the target volumes for the selected point in time after rolling back the target volumes to the selected point in time; and enabling a user to access the virtual snapshot in the storage array at the selected point in time.
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