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Method and System for Transporting and Adopting Intra-Library Fostered Data

IP.com Disclosure Number: IPCOM000236883D
Publication Date: 2014-May-21
Document File: 2 page(s) / 63K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system is disclosed for transporting and adopting intra-library fostered data by eliminating unnecessary limited system resources.

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This is the abbreviated version, containing approximately 51% of the total text.

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Method and System for Transporting and Adopting Intra-Library Fostered Data

The latest line of tape virtualization products revolutionizes the way mainframe customers utilize tape resources. An important

reason to use tape is for recovery of critical operations in the event of a disaster. A typical grid configuration consists of at least

one production cluster and at least one disaster recovery (DR) cluster. Host data written into the production clusters is replicated to the DR clusters. When a DR cluster in a grid is down due to maintenance or a critical error, the grid can no longer receive or retrieve customer data. The production cluster need to keep host data in a copy queue until the DR cluster returns to an online state before resuming replication. As the host writes more and more data to the production cluster, the copy queue continues to grow in size. The customer is exposed to not possessing a secondary copy of the data.

Disclosed is a method and system for transporting and adopting intra-library fostered data by eliminating unnecessary limited system resources. The limited system resources are associated with receiving temporary replication data and restoring the data to a target owner in a grid. In a storage environment multiple clusters are joined to form a grid. Host data written in the form of logical volumes can be stored on one or more clusters. Storage policies control location where the logical volumes are stored. When a storage policy specifying a copy of a logical volume is to be made to a target cluster that is unable to receive the copy, a source cluster can choose another cluster in the grid to receive temporary copies on a physical tape. Once the target cluster is operational, the target cluster gains knowledge about logical volumes on the physical tape that the target cluster needs to inherit. The physical tape is then ejected from the cluster that received the temporary copies. Thereafter, the ejected tapes are inserted into a physical library connected to the target cluster. The target cluster acknowledges and inherits the logical volume stacked on the inserted tapes by possessing fore knowledge of the inserted tapes. The cluster that received the temporary copies receives confirmation of the logical volume inheritance from the target cluster. Thereafter, the target cluster relea...