End-to-end restartability of cross-region replication using a common snapshot

A non-transitory computer-readable medium storing computer-executable instructions that, when executed by one or more processors of a computing system, cause the one or more processors to perform operations comprising:

• performing, by a computing system, a cross-region replication between a source file system in a source region and a target file system in a target region after encountering a triggering event, the source region and the target region being different regions;
• receiving a first request, by the computing system, a first request to terminate the cross-region replication;
• responsive to the first request, synchronizing, by the computing system, operations between the source region and the target region, the synchronizing comprises modifying one of a lifecycle state or a delta state;
• initiating, by the computing system, cleanup operations of resources in at least the source file system or the target file system based at least in part on one of the lifecycle state or the delta state;
• performing, by the computing system, the cleanup operations;
• receiving, by the computing system, a second request to reinitiate cross-region replication and reuse the source file system as a primary region after the cross-region replication, the primary region being an operating region before the triggering event occurred;
• communicating, by the computing system, replication-related information between the source file system and the target file system;
• generating, by the computing system, a first restartable base snapshot in the source file system associated with a first point in time from before the triggering event occurred, the first restartable base snapshot being configured to allow the source file system to operate according to baseline operations after the triggering event;
• generating, by the computing system, a second restartable base snapshot associated with a second point in time from after the triggering event occurred, the second restartable base snapshot being configured to allow the source file system to operate according to baseline operations after the triggering event;
• selecting, by the computing system, one of the first restartable base snapshot associated with the first point in time from before the triggering event occurred or the second restartable base snapshot associated with the second point in time from after the triggering event occurred;
• and
• performing, by the source file system of the computing system, operations corresponding to the cross-region replication using the selected one of the first restartable base snapshot or the second restartable base snapshot without dependency on the target file system.

A system, comprising:

• one or more processors;
• and
• one or more non-transitory computer readable media storing computer-executable instructions that, when executed by the one or more processors, cause the system to:
• perform a cross-region replication between a source file system in a source region and a target file system in a target region after encountering a triggering event, the source region and the target region being different regions;
• receive a first request to terminate the cross-region replication;
• responsive to the first request, synchronize operations between the source region and the target region, wherein the synchronizing comprises modifying one of a lifecycle state or a delta state;
• initiate cleanup operations of resources in at least the source file system or the target file system based at least in part on one of the lifecycle state or the delta state;
• perform the cleanup operations;
• receive a second request to reinitiate cross-region replication and reuse the source file system as a primary region after the cross-region replication, the primary region being an operating region before the triggering event occurred;
• communicate replication-related information between the source file system and the target file system;
• generate a first restartable base snapshot in the source file system associated with a first point in time from before the triggering event occurred, the first restartable base snapshot being configured to allow the source file system to operate according to baseline operations after the triggering event;
• generate a second restartable base snapshot associated with a second point in time from after the triggering event occurred, the second restartable base snapshot being configured to allow the source file system to operate according to baseline operations after the triggering event;
• select one of the first restartable base snapshot associated with the first point in time from before the triggering event occurred or the second restartable base snapshot associated with the second point in time from after the triggering event occurred;
• and
• perform, by the source file system, operations corresponding to the cross-region replication using the selected one of the first restartable base snapshot or the second restartable base snapshot without dependency on the target file system.