公开(公告)号：WO2017053220A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/052431

申请日：2016-09-19

Applicant: NETAPP, INC.

Inventor： NGAN, Ching-Yuk, Paul ,  SINGH, Kanwaldeep ,  MU, Yuedong ,  SUNDARARAJAN, Manoj, Kumar V

IPC: G06F17/30 ,  G06F11/14 ,  G06F11/20

CPC classification number: G06F17/30174 ,  G06F11/1471 ,  G06F11/2074 ,  G06F11/2082

Abstract: One or more techniques and/or computing devices are provided for data synchronization. For example, an in-flight log may be maintained to track storage operations that are received by a first storage node, but have not been committed to both first storage of the first storage node and second storage of a second storage node that has a replication relationship, such as a disaster recovery relationship, with the first storage node. A dirty region log may be maintained to track regions within the first storage that have been modified by storage operations that have not been replicated to the second storage. Accordingly, a catchup synchronization phase (e.g., asynchronous replication by a resync scanner) may be performed to replicate storage operations (e.g., replicate data within dirty regions of the first storage that were modified by such storage operations) to the second storage until the first storage and the second storage are synchronized.

Abstract translation: 提供了一种或多种技术和/或计算设备用于数据同步。 例如，可以维护飞行中日志以跟踪由第一存储节点接收但尚未提交到第一存储节点的第一存储和具有复制的第二存储节点的第二存储的存储操作 关系，如灾难恢复关系，与第一个存储节点。 可以维护脏区域日志以跟踪由第一存储器中未被复制到第二存储器的存储操作修改的区域。 因此，可以执行追赶同步阶段（例如，重新同步扫描器的异步复制）以将存储操作（例如，通过这种存储操作修改的第一存储器的脏区域内的复制数据）复制到第二存储器，直到第一存储器 存储和第二个存储被同步。