Establishing object atomicity in snapshot based disaster recovery environments

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se, the program instructions readable and/or executable by a controller to cause the controller to perform a method comprising:

• capturing, by the controller, a snapshot of data stored at a primary storage location;
• determining, by the controller, a transaction identification which corresponds to each file operation included in the snapshot, wherein each file operation includes a respective number of sub-operations;
• identifying, by the controller, data included in the snapshot which corresponds to completed ones of the sub-operations;
• using, by the controller, the determined transaction identifications and the identified data to populate entries in a data structure;
• sending, by the controller, the snapshot to a secondary storage location;
• receiving, by the controller, an acknowledgement from the secondary storage location for each of the completed sub-operations that are successfully performed at the secondary storage location;
• and
• updating, by the controller, the data structure based on the received acknowledgements.

A system, comprising:

• a processor;
• and
• logic integrated with the processor, executable by the processor, or integrated with and executable by the processor, the logic being configured to:
• capture, by the processor, a snapshot of data stored at a primary storage location;
• determine, by the processor, a transaction identification which corresponds to each file operation included in the snapshot, wherein each file operation includes a respective number of sub-operations;
• identify, by the processor, data included in the snapshot which corresponds to completed ones of the sub-operations;
• use, by the processor, the determined transaction identifications and the identified data to populate entries in a data structure;
• send, by the processor, the snapshot to a secondary storage location;
• receive, by the processor, an acknowledgement from the secondary storage location for each of the completed sub-operations that are successfully performed at the secondary storage location;
• and
• update, by the processor, the data structure based on the received acknowledgements.