Lifecycle transition validation for storage objects

A system, comprising:

• one or more processors;
• and
• a memory storing instructions that, when executed by the one or more processors,
• cause the one or more processors to:
• determine a lifecycle policy for a storage object of a collection of storage objects of a storage service based at least in part on metadata for the collection indicating a policy assignment sequence number for the lifecycle policy and that the lifecycle policy applies to the storage object when stored in the collection, wherein the lifecycle policy comprises an indication of a lifecycle transition of the storage object, wherein the lifecycle transition comprises a transition from a first service level to a second service level, wherein the first service level and the second service level each, respectively, comprise at least one of:
• a durability level,
• an availability level,
• a performance level indicating expected latencies for storage operations, or
• any combination thereof;
• determine whether to perform a modification operation associated with the storage based at least in part on a comparison of the policy assignment sequence number and a policy modification sequence number indicated in metadata for the storage object;
• initiate the modification operation associated with the storage object in accordance with the lifecycle policy in response to a determination that the policy assignment sequence number matches the policy modification sequence number;
• verify that the modification operation has succeeded;
• and
• provide, in response to a query, an indication of a current service level of the storage object.

A non-transitory, computer-readable storage medium storing instructions that, when executed by one or more processors, cause the one or more processors to:

• determine a lifecycle policy for a storage object of a collection of storage objects of a storage service based at least in part on metadata for the collection indicating a policy assignment sequence number for the lifecycle policy and that the lifecycle policy applies to the storage object when stored in the collection, wherein the lifecycle policy comprises an indication of a lifecycle transition of the storage object, wherein the lifecycle transition comprises a transition from a first service level to a second service level, wherein the first service level and the second service level each, respectively, comprise at least one of:
• a durability level indicating a probability of permanent data loss of the storage object,
• an availability level indicating an amount of time which the storage object is expected to be inaccessible over a particular time period,
• a performance level indicating expected latencies for storage operations,
• a replication level indicating a number of replicas of the storage object to be stored, or
• any combination thereof;
• determine whether to perform a modification operation associated with the storage based at least in part on a comparison of the policy assignment sequence number and a policy modification sequence number indicated in metadata for the storage object;
• initiate the modification operation associated with the storage object in accordance with the lifecycle policy in response to a determination that the policy assignment sequence number matches the policy modification sequence number;
• verify that the modification operation has succeeded;
• and
• provide, in response to a query, an indication of a current service level of the storage object.