Continuous and asynchronous replication of a consistent dataset
AssigneeInternational Business Machines Corporation
InventorsDean Hildebrand, Aameek Singh, Renu Tewari
Life of this patent
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Abstract
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.
Claims5
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.
Dependencies are inferred from the claim text.