Data snapshot method, device and equipment

The invention provides a data snapshot method, device and equipment. The method comprises the following steps: determining that a data block is subjected to data updating; judging whether the data block meets a sub-block snapshot condition or not; if yes, determining a to-be-snapshotted sub-block from the data block, wherein the to-be-snapshotted sub-block is a sub-block with data update in the data block; and carrying out snapshot on the data of the to-be-snapshot sub-block in the data block. According to the technical scheme, storage space and storage resources can be saved. 本申请提供一种数据快照方法、装置及设备，该方法包括：确定数据块发生数据更新；判断所述数据块是否符合子块快照条件；如果是，则从所述数据块中确定待快照子块；其中，所述待快照子块是所述数据块中发生数据更新的子块；对所述数据块中的所述待快照子块的数据进行快照。通过本申请的技术方案，能够节省存储空间和存储资源。