Abstract: A system can register, by a replication component and with a notification component, for notifications to changes in a group of data in data storage, wherein the notification component is configured to write respective changes in the group of data to a replication stream. The system can retrieve, by the replication component, a change of the changes in the group of data from the replication stream. The system can, in response to determining that the change corresponds to a replication policy, replicate, by the replication component, data of the group of data that corresponds to the change to a target system, wherein the replication component is configured to perform a replication on target systems having respective different storage types.

Abstract: A system can register, by a replication component and with a notification component, for notifications to changes in a group of data in data storage, wherein the notification component is configured to write respective changes in the group of data to a replication stream. The system can retrieve, by the replication component, a change of the changes in the group of data from the replication stream. The system can, in response to determining that the change corresponds to a replication policy, replicate, by the replication component, data of the group of data that corresponds to the change to a target system, wherein the replication component is configured to perform a replication on target systems having respective different storage types.

Abstract: Storage system management is provided. Metadata in a first version at a first time point of the storage system is obtained, here the metadata in the first version describes reference relations between at least one data block in a chunk included in the storage system and at least one object stored in the storage system at the first time point. Metadata in a second version at a second time point of the storage system is obtained, the second time point being after the first time point. The chunk included in the storage system is managed based on a determined difference between the metadata in the first version and the metadata in the second version. By means of the technical solution of the present disclosure, chunks in the storage system may be managed more effectively, and the chunk reclaiming efficiency may be increased.

Abstract: Storage system management is provided. Metadata in a first version at a first time point of the storage system is obtained, here the metadata in the first version describes reference relations between at least one data block in a chunk included in the storage system and at least one object stored in the storage system at the first time point. Metadata in a second version at a second time point of the storage system is obtained, the second time point being after the first time point. The chunk included in the storage system is managed based on a determined difference between the metadata in the first version and the metadata in the second version. By means of the technical solution of the present disclosure, chunks in the storage system may be managed more effectively, and the chunk reclaiming efficiency may be increased.