Abstract: Responsive to a configuration event, a controller instance generates, according to a current version of a configuration interface between the controller instance and a data instance, a configuration message. The configuration message is obtained, via message service, by remote data instances. The remote data instances attempt to process the configuration message, according to whichever version of the configuration interface the respective data instances are using. Appropriate acknowledgements (based on whether the remote data instances could fully process the configuration message or not) are generated and returned to the controller instance that marks a record for the configuration message as complete for the remote instance or marks the record for the configuration message to be re-sent for the remote instance. After waiting some period of time to allow data instances with out-of-date versions to update, a configuration message update cycle re-sends the message to the appropriate remote data instances.

Abstract: A method of managing snapshots on a storage system includes a storage controller (1) receiving a request to store a first snapshot associated with a first volume among a plurality of volumes on the storage system and (2) determining if an assigned snapshot reserve space remaining associated with the first volume is less than an amount of space that is required to store the first snapshot. In response to the assigned snapshot reserve space remaining being less than the amount of space required, borrowing snapshot reserve space from at least one of an unused assigned space or an unused unassigned space within the storage system and storing at least a portion of the first snapshot to the borrowed snapshot reserve space.

Abstract: A method of managing snapshots on a storage system includes a storage controller (1) receiving a request to store a first snapshot associated with a first volume among a plurality of volumes on the storage system and (2) determining if an assigned snapshot reserve space remaining associated with the first volume is less than an amount of space that is required to store the first snapshot. In response to the assigned snapshot reserve space remaining being less than the amount of space required, borrowing snapshot reserve space from at least one of an unused assigned space or an unused unassigned space within the storage system and storing at least a portion of the first snapshot to the borrowed snapshot reserve space.

Abstract: A method of managing snapshots on a storage system includes a storage controller (1) receiving a request to store a first snapshot associated with a first volume among a plurality of volumes on the storage system and (2) determining if an assigned snapshot reserve space remaining associated with the first volume is less than an amount of space that is required to store the first snapshot. In response to the assigned snapshot reserve space remaining being less than the amount of space required, borrowing snapshot reserve space from at least one of an unused assigned space or an unused unassigned space within the storage system and storing at least a portion of the first snapshot to the borrowed snapshot reserve space.

Abstract: A method of managing snapshots on a storage system includes a storage controller (1) receiving a request to store a first snapshot associated with a first volume among a plurality of volumes on the storage system and (2) determining if an assigned snapshot reserve space remaining associated with the first volume is less than an amount of space that is required to store the first snapshot. In response to the assigned snapshot reserve space remaining being less than the amount of space required, borrowing snapshot reserve space from at least one of an unused assigned space or an unused unassigned space within the storage system and storing at least a portion of the first snapshot to the borrowed snapshot reserve space.