Push-based piggyback system for source-driven logical replication in a storage environment

A method comprising:

• receiving, at a first node of a source-driven replication system, a first data stream including a plurality of extents associated with a data set;
• identifying, at the first node, a missing extent of the plurality of extents associated with the data set;
• receiving a push inquiry from a second node;
• sending, from the first node for delivery to the second node, a push inquiry response requesting the missing extent, the push inquiry response for causing the second node to initiate a push of data of the missing extent;
• receiving, at the first node, a second data stream including both data of the missing extent requested by the first node and a piggyback flag indicating that the missing extent was requested by the first node through the push inquiry response;
• and
• reconstructing, at the first node, the data set from the plurality of extents and the missing extent on reception of the missing extent.

A first node, comprising:

• a memory having stored thereon instructions for performing a method;
• and
• a processor coupled to the memory, the processor configured to execute the instructions to cause the processor to:
• receive, from a second node, a plurality of extents associated with a replicated data set, wherein the replicated data set is reconstructed at the first node, the replicated data has a same logical layout and a different physical layout as an original data set at the second node;
• identify a missing extent of the plurality of extents associated with the replicated data set;
• receive a push inquiry from the second node;
• send, for delivery to the second node, a push inquiry response requesting the missing extent, wherein the push inquiry response is for causing the second node to initiate a push of data of the missing extent;
• and
• receive a data stream pushed from the second node, the data stream comprising both data of the missing extent requested by the first node and a piggyback flag indicating that the missing extent was requested by the first node through the push inquiry response.