Continuous and asynchronous replication of a consistent dataset

摘要

Embodiments of the invention relate to creating and maintaining consistent data sets in a shared pool of configurable computer resources to support disaster recovery support. Data from an application is stored in local data storage and replicated to another data storage. A consistency point of the data is created in both of the data storage, with the consistency point representing an identical data set at a point-in-time. Based upon the created consistency points, a consistent set of application data may be requested to support a read operation for a migrated application.

主权项

1. A method comprising:
writing data from at least one write operation and storing associated write data in a first data site that is in communication with a first data storage system, for each write, identifying file system data and metadata changes; tracking and recording file system data and metadata consisting of the identified changes; asynchronously synchronizing the tracked data and metadata changes to a second data site with a second data storage, the second data site being in communication with the first data site, wherein the second data site is a shared pool of resources separate from the first data site; creating a first consistency point in the first data storage, the first consistency point representing file system data and metadata at a first point-in-time, including quiescing the file system and suspending processing of data and metadata in the message queue local to the first data site prior to creation of the first consistency point; and creating a second consistency point in the second data storage, wherein the second consistency point represents the same file data and metadata as the first consistency point.