公开(公告)号：US10423641B2

公开(公告)日：2019-09-24

申请号：US15446813

申请日：2017-03-01

Applicant: NetApp, Inc.

Inventor： Eric Bonnell ,  William Hetrick ,  Theresa Lynn Segura ,  Eric Keighin

IPC: G06F16/27 ,  G06F16/22 ,  G06F16/23

Abstract: A system and method for managing distributed coherent datasets using a hierarchical change log is provided. In some embodiments, a distributed storage system is provided that includes a primary storage device containing a primary dataset and a mirror storage device containing a mirror dataset. The mirror dataset includes a coherent copy of the primary dataset. The distributed storage system further includes a hierarchical change log tracking a coherence state for the mirror dataset. The hierarchical change log includes a first sub-log and a second sub-log, and a block range of the first sub-log overlaps a block range of the second sub-log. The hierarchical change log may define a priority relationship between the first sub-log and the second sub-log governing the overlap. The first sub-log and the second sub-log may be independently configured and may be different in one of a representation and a block size.

公开(公告)号：US09607065B2

公开(公告)日：2017-03-28

申请号：US13871518

申请日：2013-04-26

Applicant: NetApp, Inc.

Inventor： Eric Bonnell ,  William Hetrick ,  Theresa Lynn Segura ,  Eric Keighin

IPC: G06F17/30

CPC classification number: G06F17/30575 ,  G06F17/30324 ,  G06F17/30368

Abstract: A system and method for managing distributed coherent datasets using a hierarchical change log is provided. In some embodiments, a distributed storage system is provided that includes a primary storage device containing a primary dataset and a mirror storage device containing a mirror dataset. The mirror dataset includes a coherent copy of the primary dataset. The distributed storage system further includes a hierarchical change log tracking a coherence state for the mirror dataset. The hierarchical change log includes a first sub-log and a second sub-log, and a block range of the first sub-log overlaps a block range of the second sub-log. The hierarchical change log may define a priority relationship between the first sub-log and the second sub-log governing the overlap. The first sub-log and the second sub-log may be independently configured and may be different in one of a representation and a block size.