Patent ID: 8666947
Filing Date: 2014-03-04
Classification: G06F

Abstract:
1. A method for providing recoverability to a system, the method comprising: protecting a critical partitioned dataset extended (PDSE) by creating a copy of the critical PDSE, referred to as a PDSE copy; providing a critical dataset redundancy (CDR) task with exclusive access to the PDSE copy; initiating a transaction queue for tracking updates to the critical PDSE; adding any updates performed to the critical PDSE to the transaction queue; updating the PDSE copy according to the transaction queue; quiescing the critical PDSE; corralling a plurality of open connections to the critical PDSE in response to the quiescing; completing each of one or more updates resident in the transaction queue to bring the PDSE copy up to a last known uncorrupted state of the critical PDSE; providing a replacement critical PDSE by redirecting the corralled connections to the PDSE copy; protecting the replacement critical PDSE by creating a copy of the replacement critical PDSE, referred to as a replacement PDSE copy; and providing the CDR task with exclusive access to the replacement PDSE copy.