SNAPSHOTS AND FORKS OF STORAGE SYSTEMS USING DISTRIBUTED CONSISTENT DATABASES IMPLEMENTED WITHIN AN OBJECT STORE

摘要

A method is described that includes providing a snapshot counter for a storage system implemented with multiple distributed consistent database instances. The method further includes recognizing the taking of a snapshot of the storage system by incrementing the snapshot counter from a first snapshot counter value to a second snapshot counter value. The method further includes, in response to a first change for one of the distributed consistent databases subsequent to the taking of the snapshot, performing the following: saving state information of the distributed consistent database as the state information existed prior to the change and associating the first snapshot counter value to the state information. Associating the second snapshot counter's value with the distributed consistent database having the first change. Another method for the taking of a snapshot of a distributed consistent database is also described.

主权项

1. A method, comprising:
providing a snapshot counter for a storage system implemented with multiple distributed consistent database instances; recognizing the taking of a snapshot of said storage system by incrementing said snapshot counter from a first snapshot counter value to a second snapshot counter value; in response to a first change for one of said distributed consistent databases subsequent to said taking of said snapshot, performing the following: saving state information of said distributed consistent database as said state information existed prior to said change and associating said first snapshot counter value to said state information; associating said second snapshot counter's value with said distributed consistent database having said first change.