Lifecycle transitions in log-coordinated data stores

A method, comprising:

• determining, at a configuration manager of a heterogeneous storage service, one or more lifecycle transitions to be implemented for at least a portion of a first data store of a plurality of data stores for which write requests are coordinated by a log-based transaction manager on behalf of a client, wherein, in accordance with a first lifecycle transition of the one or more lifecycle transitions, a data object is to be transferred to a second data store of the plurality of data stores based at least in part on a transfer criterion, wherein the transition criterion comprises a duration for which the data object has resided in the first data store, and wherein the second data store is selected as a destination of the first lifecycle transition based at least in part on a difference in a service capability between the first data store and the second data store;
• assigning, by the configuration manager, a particular transition agent of one or more transition agents of the heterogeneous storage service to perform the first lifecycle transition;
• and
• in response to detecting, by the particular transition agent and in accordance with the first lifecycle transition, that a particular data object meets the transfer criterion, transferring, by the particular transition agent, the particular data object to the second data store and storing, by the particular transition agent, a transition record indicating that the particular data object has been transferred in accordance with the first lifecycle transition to provide a transition of service capability on behalf of the client.

A non-transitory computer-accessible storage medium storing program instructions that when executed on one or more processors implements a configuration manager of a storage service, wherein the configuration manager is configured to:

• determine an optimization goal for a storage group established on behalf of a client, wherein the storage group comprises a plurality of data stores for which write requests are coordinated by a log-based transaction manager;
• identify, in accordance with the optimization goal, one or more data lifecycle transitions to be implemented for at least a portion of a first data store of the plurality of data stores, wherein, in accordance with a first data lifecycle transition of the one or more data lifecycle transitions, a data object is to be transferred to a second data store of the plurality of data stores based at least in part on a duration for which the data object has resided in the first data store;
• and
• assign, by the configuration manager and responsive to the identification, at least a first transition agent to implement the first lifecycle transition.