Patent ID: 8412900
Filing Date: 2013-04-02
Classification: G06F

Abstract:
1. A storage system in which a primary storage control apparatus and a secondary control apparatus are connected by way of a communication network, wherein the primary storage control apparatus and the secondary storage control apparatus are connected by way of at least one first communication path for transmitting a command from the primary storage control apparatus to the secondary storage control apparatus and at least one second communication path for transmitting a command from the secondary storage control apparatus to the primary storage control apparatus, the primary storage control apparatus comprises: a command processing unit for writing write data received from a host computer to a primary volume; a journal data creation unit for creating journal data based on the write data and storing the journal data in a primary journal volume corresponding to the primary volume; a journal data transfer unit for reading journal data from the primary journal volume based on a journal data read request received by way of the second communication path and transferring the read journal data to the second storage control apparatus; and a transfer control unit, which, in specified occasions, controls at least either one of the journal data transfer amount by the journal data transfer unit and the width of the communication band utilized for journal data transfer, and the secondary storage control apparatus comprises: a journal data acquisition unit for issuing the journal data read request, acquiring the journal data from the journal data transfer unit, and storing the acquired the journal data in a secondary journal volume; and a journal processing unit for reading the journal data from the secondary journal volume and writing the journal data to a secondary volume corresponding to the primary volume; and a transfer status determination unit for determining whether the journal data transfer by the journal data transfer unit succeeded or not, and if it is determined by the transfer status determination unit that the journal data transfer failed, the transfer control unit controls at least either one of the journal data transfer amount by the journal data transfer unit and the width of the communication band; wherein the transfer control unit is configured to: