Online data movement without compromising data integrity

Embodiments are directed to modifying storage capacity within a data store and to modifying resiliency for a data store. In one scenario, a computer system receives a request to move data. The computer system may determine that data is to be moved from an allocation on one data store to a new allocation on another data store. The computer system may create a new allocation on the other data store, where the new allocation is configured to receive data from the first data store. The computer system then moves the data to the new allocation on the second data store as data I/O requests are received at the first data store. Data store access requests are synchronized with the data movement by directing the data store access requests to the first data store, to the second data store or to both data stores depending on the type of access request. 实施例针对修改数据存储库内的存储容量和修改针对数据存储库的弹性。在个场景中，种计算机系统接收对移动数据的请求。所述计算机系统可以确定数据将被从个数据存储库上的分配移动到另个数据存储库上的新的分配。所述计算机系统可以在另个数据存储库上创建新的分配，其中，所述新的分配被配置为接收来自所述第数据存储库的数据。所述计算机系统然后当在所述第数据存储