Abstract: Embodiments of the present disclosure relate to hotness based data storage for facilitating garbage collection. For target data to be stored into a flash drive, hotness of the target is determined, which indicates an expected update frequency of the target data. Then the in-use blocks in the flash drive are searched for a matching block for storing the target data, such that hotness of data being stored in the matching block matches the hotness of the target data. If no matching block is found, a free block is selected for storing the target data. The selection of the free block is based on the hotness of the target data and a degree of wear of the free block.

Abstract: Embodiments of the present disclosure relate to hotness based data storage for facilitating garbage collection. For target data to be stored into a flash drive, hotness of the target is determined, which indicates an expected update frequency of the target data. Then the in-use blocks in the flash drive are searched for a matching block for storing the target data, such that hotness of data being stored in the matching block matches the hotness of the target data. If no matching block is found, a free block is selected for storing the target data. The selection of the free block is based on the hotness of the target data and a degree of wear of the free block.

Abstract: A method, migration manager, and system of storage system migration. The method includes creating a first zone including a host system in a first SAN-based storage system and an in-band SAN virtualization storage node. The method creates a second zone including a backend storage system in the first SAN-based storage system and the in-band SAN virtualization storage node. A storage unit exported by the backend storage system is mapped to a virtual storage unit created on the in-band SAN virtualization storage node, and a third zone including the host system and backend storage system in the first SAN-based storage system is canceled. The method is performed without disrupting an existing connection path between the host system and the backend storage system in the first SAN-based storage system. A migration manager of a migration system migrates a first SAN-based storage system into an in-band SAN virtualization storage system.