Patent ID: 9507800
Filing Date: 2016-11-29
CPC Classification: G06F

Claim Text:
1. A method, comprising: storing, by a data node of a distributed data processing system, blocks of data on a first data storage system and a second data storage system, the first data storage system to store the blocks of data in a format different from a format of the blocks of data stored in the second storage system; identifying, at the data node and based on a data eviction policy, one or more of the blocks of data stored on the first storage system as cold data; determining, at the data node, whether the cold data is stored on the second storage system; responsive to a determination that the cold data is stored on the second storage system, deleting the cold data from the first storage system; responsive to a determination that the cold data is not stored on the second storage system, storing, by the data node, the cold data on the second storage system and evicting the cold data from the first storage system; obtaining, at the data node, an object identification (ID) associated with the cold data from the second storage system; and storing, by the data node, the object ID of the cold data in the first storage system.