Distributed replication in cluster environments

摘要

Various systems and methods for dividing, accessing, and sending portions of a data structure from one node to another for replication from a primary site to a secondary site are disclosed. The method includes dividing a data structure into portions. The data structure stores information identifying which regions of a data volume have been modified and nodes in a cluster share access to the data volume. The nodes and the data volume are located at the primary site. The method also includes sending a first portion of the data structure to a second node in the cluster. The sending causes the second node to replicate the data identified in the portion of the data structure from the data volume to the secondary site. In one embodiment, the accessing and the sending are performed by a logowner node.

主权项

1. A method comprising:
dividing a data structure into a plurality of portions, wherein
the data structure stores information identifying which regions of a data volume have been modified,a plurality of nodes in a cluster share access to the data volume, andthe plurality of nodes and the data volume are located at a primary site; sending a first portion of the plurality of portions of the data structure to a node of the plurality of nodes in the cluster, wherein
the sending causes the node to replicate data identified in the portion of the data structure to a secondary site, andthe sending is performed by a logowner node of the plurality of nodes; and detecting that a log will overflow, wherein
the log identifies a first plurality of modifications to the data volume and an order in which the first plurality of modifications occurred, and
the data structure identifies one or more modifications that occurred after the detecting that the log will overflow.