| 摘要 |
<p>A method for instantaneously saving an image of storage unit data in a data processing system and transferring it to a save unit. The data image is described by a save counter (29), a root node pointer (28) and a data structure including a root node (12) and nodes (13, 14, 15) containing pointers to other nodes (16, 17, 18) or data blocks (30). The data image is saved by incrementing the save counter by one, copying the root node and updating the root node pointer. The system is particularly suitable for saving computer data.</p> |
