公开(公告)号：US20170031771A1

公开(公告)日：2017-02-02

申请号：US14813832

申请日：2015-07-30

Applicant: NetApp, Inc.

Inventor： Charles Binford ,  Mahmoud Jibbe ,  Martin Parrish

IPC: G06F11/14

CPC classification number: G06F11/1451 ,  G06F11/1076 ,  G06F11/14 ,  G06F16/128 ,  G06F2201/84

Abstract: A system, method, and computer program product for the provision of a snapshot repository that grows and shrinks over time. The snapshot repository stores snapshot images. When the used capacity of the repository reaches an upper bound of the repository, the image may be wrapped to the start of the repository if the image stored there previously has been deleted. Otherwise another stripe volume is added from a pool of available volumes and the image continues storage there. As older images are deleted according to a retention policy, stripe volumes that become empty may be dis-associated from their associated LBA range and released to the pool or re-mapped to a lower LBA range of the repository. When the empty stripe volume is at the end of the repository, the ending LBA may be adjusted to the end of the last allocated stripe volume as the volume is released.

Abstract translation: 一种用于提供随时间增长和缩小的快照存储库的系统，方法和计算机程序产品。 快照存储库存储快照映像。 当存储库的使用容量达到存储库的上限时，如果先前存储的映像已经被删除，则映像可以被包装到存储库的开头。 否则，从可用卷池中添加另一个条带卷，并且图像继续存储在那里。 随着旧图像根据保留策略被删除，变空的条带卷可能与其关联的LBA范围不相关，并释放到池中或重新映射到存储库的较低LBA范围。 当空条带卷位于存储库的末尾时，结束的LBA可能会在卷释放后调整到最后分配的条带卷的末尾。