Patent ID: 7613674
Filing Date: 2009-11-03
Classification: G06F,G06Q

Abstract:
1. A data transfer system comprising: a host computer stored with at least one business program each repeatedly executing a business processing; a first storage apparatus connected to said host computer via a network; and a second storage apparatus connected to said first storage apparatus via the network, in which said first storage apparatus which receives a data storage request from said host computer transmits said data to said second storage apparatus in asynchronism with storing operation of the data into a first storage area owned by said first storage apparatus and backs up said data to said second storage apparatus, wherein: said host computer is configured to transmit said data storage request in response to receiving disaster prediction information; said host computer attaches an identifier indicative of an end of the business processing to a data storage request and transmits the data storage request with the respective identifier to said first storage apparatus; said first storage apparatus calculates a respective data amount of data which is to be backed up to said second storage apparatus but has not yet been sent thereto for every said identifier based upon the respective data storage request issued from said host computer, and transmits both said identifier and said respective data amount as calculated to said host computer, the respective data amounts corresponding to the identifiers are different in accordance with different business processing; said host computer selects at least one specific identifier from the identifiers received from said first storage apparatus based upon said respective data amount received from said first storage apparatus such that data corresponding to the selected identifier can be transmitted within a predetermined time interval, and transmits the selected identifier to said first storage apparatus; and said first storage apparatus transmits data grouped by said selected identifier to said second storage apparatus with a top priority and prior to a disaster occurrence prediction time, and backs up said grouped data into said second storage apparatus.