Abstract: Techniques for data replication involve: in response to a first source state machine associated with a source file system being booted up, booting up a second source state machine associated with the source file system, the first source state machine performing a first operation for resizing a first storage area of data for replication from the source file system; transmitting a resizing message from the second source state machine to a destination file system, to enable the destination file system to perform a second operation for resizing a second storage area for storing the data to be replicated into the destination file system; and in response to the first operation and the second operation being successfully performed, enabling the data for replication from the source file system to be replicated into the destination file system.

Abstract: Techniques for data synchronization involve obtaining a first bitmap about a first storage device, the first storage device including a group of storage areas, a bit in the first bitmap indicating whether data in a corresponding storage area of a first size in the group of storage areas is to be synchronized to a second storage device. The technique further involves, in response to a configuration of the first storage device being changed, determining a second size of a storage area in the group of storage areas. The technique further involves converting the first bitmap into a second bitmap based on the first size and the second size. In addition, the technique further involves synchronizing data from the first storage device to the second storage device based on the second size and the second bitmap.

Abstract: Techniques for data replication involve: in response to a first source state machine associated with a source file system being booted up, booting up a second source state machine associated with the source file system, the first source state machine performing a first operation for resizing a first storage area of data for replication from the source file system; transmitting a resizing message from the second source state machine to a destination file system, to enable the destination file system to perform a second operation for resizing a second storage area for storing the data to be replicated into the destination file system; and in response to the first operation and the second operation being successfully performed, enabling the data for replication from the source file system to be replicated into the destination file system.

Abstract: Techniques for data synchronization involve obtaining a first bitmap about a first storage device, the first storage device including a group of storage areas, a bit in the first bitmap indicating whether data in a corresponding storage area of a first size in the group of storage areas is to be synchronized to a second storage device. The technique further involves, in response to a configuration of the first storage device being changed, determining a second size of a storage area in the group of storage areas. The technique further involves converting the first bitmap into a second bitmap based on the first size and the second size. In addition, the technique further involves synchronizing data from the first storage device to the second storage device based on the second size and the second bitmap.