Patent ID: 8898413
Filing Date: 2014-11-25
Classification: G06F

Abstract:
1. A computer-implemented method for increasing computer system availability, the method comprising: making in a real storage, via a computer processor, a point-in-time copy of a first page content stored in a first page data structure by creating a second page content in a second page data structure, the second page content pointing to actual data pointed to by the first page content, wherein the first page content includes a location of a virtual page in a first virtual storage; storing the second page content in the second page data structure, the first page data structure and the second page data structure being stored in the real storage; marking the first page content in the first page data structure with a point-in-time page protection bit, wherein the point-in-time page protection bit prevents a modification of the virtual page; in response to an attempt to modify the virtual page, in the event the first page content in the first page data structure is marked with the point-in-time page protection bit: