Methods and systems for data resynchronization in a replication environment

A non-transitory computer-readable storage medium, comprising program instructions, which, when executed by one or more processors of a computing system, perform a method comprising:

• detecting occurrence of an event, wherein
• the event is one of a restart event or a startup event of another computing system, and
• the another computing system is at a target site;
• and
• in response to detection of the occurrence of the event,
• determining whether a source data store at a source site and a replicated data store at the target site are unsynchronized, wherein
• source data stored in the source data store has been replicated to replicated data in the replicated data store,
• the determining comprises
• determining whether a data structure indicates that one or more units of data of the source data have not been successfully replicated to the replicated data store,
• the data structure is associated with the source data store, and
• the data structure comprises a merged synchronization data structure, and
• in response to a determination that the source data store and the replicated data store are unsynchronized, performing a resynchronization operation,
• wherein
• the resynchronization operation resynchronizes the source data and the replicated data based, at least in part, on data in the data structure.

A computing system comprising:

• one or more processors;
• and
• a computer-readable storage medium coupled to the one or more processors, comprising program instructions, which, when executed by the one or more processors, perform a method comprising
• detecting occurrence of an event, wherein
• the event is one of a restart event or a startup event of a computing system at a target site, and
• in response to detection of the occurrence of the event,
• determining whether a source data store at a source site and a replicated data store at the target site are unsynchronized, wherein source data stored in the source data store has been replicated to replicated data in the replicated data store,
• the determining comprises
• determining whether a data structure indicates that one or more units of data of the source data have not been successfully replicated to the replicated data store,
• the data structure is associated with the source data store, and
• the data structure comprises a merged synchronization data structure, and
• in response to a determination that the source data store and the replicated data store are unsynchronized, performing a resynchronization operation, wherein
• the resynchronization operation resynchronizes the source data and the replicated databased, at least in part, on data in the data structure.