Patent ID: 8930311
Filing Date: 2015-01-06
Classification: G06F

Abstract:
1. A method comprising: identifying, at a destination node of a source-driven replication system, a missing extent of a plurality of extents associated with a replicated data set, wherein when the replicated data set is reconstructed at the destination node, the replicated dataset has the same logical layout and a different physical layout than the original data set at a source node; in response to a push inquiry, sending, from the destination node for delivery to the source node, a push inquiry response indicating the missing extent, the push inquiry response for causing a piggyback source engine of the source node to initiate a push of the missing extent; receiving, at the destination node, a data stream including the missing extent responsive to the push inquiry response, wherein the data stream further includes a piggyback flag indicating that the missing extent was included in the push inquiry response.