Storage system, storage control device and data transfer method
AssigneeFujitsu Limited
InventorTAKASHI KAWADA
Life of this patent
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Abstract
When a redundancy failures occurs in sequentiality-guaranteed data transfer, data transfer in a short period of time is resumed such that wherein when a factor by which the second storage device stops processing of the storage system is multiple failures of the two or more redundant control devices during a process of developing data to a storage medium in the second storage device, a session managing unit sets inconsistency as the copy session state, and a buffer managing unit sets the buffer data lost state, and when a data transfer process is resumed between the first storage device and the second storage device, the session managing unit sets consistency as the copy session state when the buffer data lost state is set by the buffer managing unit.
Claims9
A storage system that transfers sequentiality-guaranteed data from a first storage device to a second storage device connected via a network, comprising:
- two or more redundant receiving buffers that are respectively disposed in two or more redundant control devices in the second storage device and store data redundantly;
- a session managing unit that manages a copy session state representing whether there is consistency of a copy state of the sequentiality-guaranteed data between the first storage device and the second storage device;
- and
- a buffer managing unit that manages a buffer data lost state representing that the sequentiality-guaranteed data has been lost in any of the two or more redundant receiving buffers,
- wherein when a factor that causes the second storage device to stop processing of the storage system is multiple failures in two or more redundant control devices during a process of developing data in a storage medium of the second storage device, the session managing unit sets inconsistency as the copy session state, and the buffer managing unit sets the buffer data lost state, and
- when a data transfer process is resumed between the first storage device and the second storage device, the session managing unit sets consistency as the copy session state when the buffer data lost state is set by the buffer managing unit.
A storage control device equipped in a first or second storage device in a storage system that transfers sequentiality-guaranteed data from the first storage device to the second storage device connected via a network, comprising:
- two or more redundant receiving buffers in the second storage device;
- a session managing unit that manages a copy session state representing whether there is consistency of a copy state of the sequentiality-guaranteed data between the first storage device and the second storage device;
- and
- a buffer managing unit that manages a buffer data lost state representing that the sequentiality-guaranteed data has been lost in any of the two or more redundant receiving buffers,
- wherein when a factor that causes the second storage device to stop processing of the storage system is multiple failures in two or more redundant control devices during a process of developing data in a storage medium of the second storage device, the session managing unit sets inconsistency as the copy session state, and the buffer managing unit sets the buffer data lost state, and
- when a data transfer process is resumed between the first storage device and the second storage device, the session managing unit sets consistency as the copy session state when the buffer data lost state is set by the buffer managing unit.
A method of transferring sequentiality-guaranteed data from a first storage device to a second storage device, comprising:
- managing a copy session state representing whether there is consistency of a copy state of the sequentiality-guaranteed data between the first storage device and the second storage device;
- and
- managing a buffer data lost state representing that the sequentiality-guaranteed data has been lost in any of the two or more redundant receiving buffers,
- wherein when a factor that causes the second storage device to stop processing of the storage system is multiple failures in two or more redundant control devices during a process of developing data in a storage medium of the second storage device, inconsistency is set as the copy session state and the buffer data lost state is set, and
- when a data transfer process is resumed between the first storage device and the second storage device, consistency is set as the copy session state when the buffer data lost state is set.
Dependencies are inferred from the claim text.