Patent ID: 7162498
Filing Date: 2007-01-09
Classification: G06F,Y10S

Abstract:
1. A computer system comprising: a first computer; and a storage apparatus connected to said first computer, said storage apparatus having database stored in a volume thereof, wherein said first computer converts a plurality of tables included in said database, and orders said storage apparatus to copy said volume including said plurality of tables each time any one of said plurality of tables is finished in conversion of said any one of said plurality of tables, and said storage apparatus virtually copies said volume including said plurality of tables on the basis of said order into a plurality of virtual copies; wherein the storage apparatus includes a copy volume to store copy data, at a first time point, of the volume in which said database is stored; wherein the first computer orders the storage apparatus to copy, after the first time point, said volume including the plurality of tables; wherein when any one of said plurality of tables is abnormally stopped in an abnormal end of conversion, the first computer orders the storage apparatus (i) when first recovering contents of any of said plurality of tables that has finished conversion normally, to overwrite a volume of the storage apparatus, in which the database at a time of the abnormal end of conversion is stored, with the virtual copy among the plurality of virtual copies which corresponds to a latest backup data already obtained at the time of the abnormal end of conversion, and then (ii) when recovering contents of the abnormally stopped table, to specify data corresponding to the abnormally stopped table from the copy volume and overwrite the volume, in which the overwritten virtual copy is stored in (i), with the specified data corresponding to the abnormally stopped table from the copy volume.