Abstract: Embodiments of the present disclosure relate to method and device for data read/write. The method comprises: in response to receiving a first read/write request for a first target area, determining whether there is a second read/write request under execution in conflict with the first read/write request, a second target area for the second read/write request at least partially overlapping with the first target area, and at least one of the first read/write request and the second read/write request being a write request; and in response to determining there being the second read/write request in conflict, suspending the first read/write request while maintaining a sub-area of the first target area in an unlocked state, the sub-area not overlapping with the second target area.

Abstract: Implementations of the present disclosure relate to a method, system and computer program product for managing a storage system. Specifically, in one implementation of the present disclosure, there is provided a method for managing a storage system. The method comprises: obtaining topological information of a storage device in a first tier and a storage device in a second tier in the storage system; obtaining a storage rule specifying storage of a data object in the storage device in the first tier or the storage device in the second tier; and in response to determining the storage rule conforming to the topological information, managing the data object in the storage system according to the storage rule. In other implementations of the present disclosure, there is provided a corresponding system and computer program product.

Abstract: Embodiments of the present disclosure relate to method and device for data read/write. The method comprises: in response to receiving a first read/write request for a first target area, determining whether there is a second read/write request under execution in conflict with the first read/write request, a second target area for the second read/write request at least partially overlapping with the first target area, and at least one of the first read/write request and the second read/write request being a write request; and in response to determining there being the second read/write request in conflict, suspending the first read/write request while maintaining a sub-area of the first target area in an unlocked state, the sub-area not overlapping with the second target area.

Abstract: Embodiments of the present disclosure relate to method and device for data read/write. The method comprises: in response to receiving a first read/write request for a first target area, determining whether there is a second read/write request under execution in conflict with the first read/write request, a second target area for the second read/write request at least partially overlapping with the first target area, and at least one of the first read/write request and the second read/write request being a write request; and in response to determining there being the second read/write request in conflict, suspending the first read/write request while maintaining a sub-area of the first target area in an unlocked state, the sub-area not overlapping with the second target area.

Abstract: Embodiments of the present disclosure relate to a method and apparatus for locking a file in a memory. The method comprises enabling a thread to obtain a mixed lock of a file. The method further comprises, in response to enabling the thread to obtain the mixed lock, enabling a further thread to obtain a shared lock of the file, and prevent the further thread from obtaining the exclusive lock or mixed lock of the file. By adding a new mixed lock to a traditional read and write lock, embodiments of the present disclosure improve concurrent access performance of the file system.

Abstract: Embodiments of the present disclosure relate to method and device for data read/write. The method comprises: in response to receiving a first read/write request for a first target area, determining whether there is a second read/write request under execution in conflict with the first read/write request, a second target area for the second read/write request at least partially overlapping with the first target area, and at least one of the first read/write request and the second read/write request being a write request; and in response to determining there being the second read/write request in conflict, suspending the first read/write request while maintaining a sub-area of the first target area in an unlocked state, the sub-area not overlapping with the second target area.

Abstract: Implementations of the present disclosure relate to a method, system and computer program product for managing a storage system. Specifically, in one implementation of the present disclosure, there is provided a method for managing a storage system. The method comprises: obtaining topological information of a storage device in a first tier and a storage device in a second tier in the storage system; obtaining a storage rule specifying storage of a data object in the storage device in the first tier or the storage device in the second tier; and in response to determining the storage rule conforming to the topological information, managing the data object in the storage system according to the storage rule. In other implementations of the present disclosure, there is provided a corresponding system and computer program product.

Abstract: Embodiments of the present disclosure relate to a method and apparatus for locking a file in a memory. The method comprises enabling a thread to obtain a mixed lock of a file. The method further comprises, in response to enabling the thread to obtain the mixed lock, enabling a further thread to obtain a shared lock of the file, and prevent the further thread from obtaining the exclusive lock or mixed lock of the file. By adding a new mixed lock to a traditional read and write lock, embodiments of the present disclosure improve concurrent access performance of the file system.