公开(公告)号：US09563517B1

公开(公告)日：2017-02-07

申请号：US14143778

申请日：2013-12-30

Applicant: EMC Corporation

Inventor： Assaf Natanzon ,  Eran Weiss

IPC: G06F11/14 ,  H04L29/08

CPC classification number: G06F11/1464 ,  G06F11/00 ,  H04L67/1095 ,  H04L67/1097

Abstract: A computer implemented method, system, and program product for creating snapshots instructions at a replication site, the method comprising determining the differences between a first snapshot at a first time of a LUN and a second snapshot at a second time of the LUN, determining the differences between the second snapshot and a third snapshot at a third time of the LUN, creating a redacted snapshot of the second snapshot wherein the redacted snapshot contains pointers to the first snapshot for the common data in the first snapshot and the second snapshot; wherein the redacted snapshot contains pointers to the third snapshot for common data in the second snapshot and the third snapshot; and further wherein the redacted snapshot stored data that is not present in the first snapshot and is not present in the third snapshot.

Abstract translation: 一种用于在复制站点创建快照指令的计算机实现的方法，系统和程序产品，所述方法包括：确定所述LUN的第一时刻的第一快照与所述LUN的第二时间的第二快照之间的差异; 第二次快照与第三次快照之间的差异，创建第二个快照的编辑快照，其中所编辑的快照包含指向第一快照和第二快照中的公共数据的第一快照的指针; 其中所述经修改的快照包含指向所述第三快照中的所述第二快照中的公共数据的指针和所述第三快照; 并且其中所述经编辑的快照存储的数据不存在于所述第一快照中，并且不存在于所述第三快照中。

公开(公告)号：US10372554B1

公开(公告)日：2019-08-06

申请号：US14143825

申请日：2013-12-30

Applicant: EMC Corporation

Inventor： Assaf Natanzon ,  Eran Weiss

IPC: G06F3/06 ,  G06F12/16 ,  G06F11/00 ,  G06F11/14

Abstract: A computer implemented method, system, and computer program product for data replication and restoration. The method includes downloading a plurality of hashes from a cloud corresponding to a set of backed up hashes for a set of chunks, wherein each chunk corresponds to a portion of a LUN at a production site at a point in time, determining a second plurality of hashes for the LUN at the production site, and comparing each of the second plurality of hashes for the LUN at the production site with the plurality of hashes downloaded from the cloud. The method further includes downloading data corresponding to one or more non-matching hashes from the cloud, and restoring the data that was downloaded to the LUN on the production site. Once the LUN has been validated, interception of IOs by a splitter may be stopped.