公开(公告)号：US20220121642A1

公开(公告)日：2022-04-21

申请号：US17644417

申请日：2021-12-15

Applicant: Salesforce.com, inc.

Inventor： Ian VARLEY ,  Scott HANSMA ,  Paul BURSTEIN

IPC: G06F16/23 ,  G06F16/27 ,  G06F16/93 ,  G06F16/954 ,  G06F16/9535

Abstract: A multi-master replication system is disclosed. The multi-master replication system allows a large set of peer instances to collaboratively replicate data to each other. According to an example, a change detection thread running on a first server associated with a first instance of multiple instances of a replicated database monitors for changes to any of multiple records within one or more shared tables of the replicated database. Responsive to detection of a change to a record, an item is stored by the change detection thread onto a queue containing information regarding the change. Groups of changes are packaged into multiple chunks, in which each chunk (i) corresponds to a discrete unit of progress for both change detection and transport; (ii) is associated with multiple changed records; (iii) contains metadata about the multiple changed records; and (iv) does not contain data from the one or more shared tables.