Patent attributes
A tiering service that supports cold tier indexing includes a warm tier and a cold tier and a resource manager that automatically relocates data items between the warm tier and the cold tier or removes data items from the cold tier in accordance with a tiering policy. The tiering service also includes a client interface configured to receive a request specifying index criteria for a cold tier index to be created. The tiering service generates a cold tier index based on data items stored in cold tier flat files satisfying the index criteria included in the request to create a cold tier index. Also, the tiering service automatically updates the cold tier index after it is stored in the cold tier as data items are relocated between the warm tier and the cold tier or removed from the cold tier in accordance with the tiering policy. In some embodiments, the tiering service also provides a common interface for accessing the cold tier index and a warm tier index.
