公开(公告)号：US11188516B2

公开(公告)日：2021-11-30

申请号：US16522419

申请日：2019-07-25

Applicant: Oracle International Corporation

Inventor： Derek Taylor ,  Chi-Kim Hoang ,  Yu-Han Chou ,  Varadarajan Aravamudhan

IPC: G06F16/23 ,  G06F16/27

Abstract: An approach for consistent database recovery for distributed database systems uses “synchronization points”. A synchronization point is a global timestamp for which across all nodes of a distributed database system, the nodes have stored change records for any transaction occurring at and before the synchronization point in persistent logs. Each node may employ asynchronous flushing. However, on a periodic basis, each node coordinates to establish a synchronization point, which may entail ensuring change records for transactions that committed at or before the synchronization point are stored in persistent logs. In effect, a synchronization point represents that any transaction committed at or before the synchronization point has been durably committed.