公开(公告)号：US08843718B2

公开(公告)日：2014-09-23

申请号：US13784194

申请日：2013-03-04

Applicant: Netapp, Inc.

Inventor： Ameya Prakash Usgaonkar ,  Kamlesh Advani

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/14

CPC classification number: G06F3/065 ,  G06F3/0608 ,  G06F3/0617 ,  G06F3/0641 ,  G06F3/067 ,  G06F3/0683 ,  G06F11/1435 ,  G06F2201/84

Abstract: A method, apparatus, and system of presentation of a read-only clone Logical Unit Number (LUN) to a host device as a snapshot of a parent LUN are disclosed. In one embodiment, a method includes generating a read-write clone LUN of a parent LUN and coalescing an identical data instance of the read-write clone LUN and the parent LUN in a data block of a volume of a storage system. A block transfer protocol layer is modified to refer the read-write clone LUN as a read-only clone LUN, according to the embodiment. Furthermore, according to the embodiment, the read-only clone LUN is presented to a host device as a snapshot of the parent LUN.

Abstract translation: 公开了将只读克隆的呈现的方法，装置和系统作为父LUN的快照呈现给主机设备的逻辑单元号（LUN）。 在一个实施例中，一种方法包括生成父LUN的读写克隆LUN，并将存储系统卷的数据块中的读写克隆LUN和父LUN的相同数据实例合并。 根据实施例，修改块传输协议层以将读写克隆LUN引用为只读克隆LUN。 此外，根据实施例，只读克隆LUN作为父LUN的快照呈现给主机设备。