DATA MANAGEMENT DEVICE AND DATA MANAGING METHOD

• US 20100251011A1
• Filed: 03/30/2010
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TAKAGI, Shunsuke, Maruyama, Tetsutaro
• Granted Patent: US 8,028,202 B2
• Time in Patent Office: Days
• US Class Current: 714/6
• CPC Class Codes: G06F 11/004 Error avoidance G06F11/07 and subgroups take precedence
• CPC Class Codes: G06F 11/008 Reliability or availability analysis

Abstract

A data management device accessible to a plurality of memories includes a risk unit which determines risk of failure associated with each of the plurality of memories, a selection unit which selects a memory from among the plurality of memories on the basis of the determined risk and a transmitting unit which transmits a replication instruction to another memory of the plurality of memories. The replication instruction causes replication of the data to be replicated that is stored in the selected memory.

Claims

1. A data management device accessible to a plurality of memories, the data management device comprising:

a receiver which receives warning messages from the plurality of memories;

a risk unit which determines a risk of failure associated with each memory of the plurality of memories on the basis of the received warning messages;

a selection unit which selects a memory of the plurality of memories based on the determined risk of failure associated with each memory of the plurality of memories, the selected memory storing data to be replicated, the data to be replicated being one of master data and replicated data corresponding to the master data; and

a transmitting unit which transmits a replication instruction to the selected memory, the replication instruction causes replication of the data to be replicated in another memory of the plurality of memories.

2. The data management device according to claim 1, wherein

the determined risk of failure of each memory is used to maintain a list ranking the plurality of memories, and

the risk determination unit selects a highest ranked memory as the selected memory, the highest ranked memory corresponding to the memory most likely to fail.

3. The data management device according to claim 1, wherein

the transmitting unit transmits the replication instruction when at least one of the risk of failure determined is higher than a threshold value.

4. The data management device according to claim 1, further comprising:

a replication destination unit which determines the another memory on the basis of at least one of the determined risk and an amount of free capacity of each memory.

5. The data management device according to claim 1, further comprising:

a detecting unit which detects a failed memory from among the plurality of memories, the plurality of memories including master data and replicated data corresponding to the master data; and

a setting unit which, in a case that data stored in the failed memory detected by the detecting unit is master data, sets the replicated data corresponding to the master data as the master data.

6. The data management device according to claim 5, wherein

the plurality of memories further include replicated spare data corresponding to one of the master data and the replicated data, and

the setting unit,

in a case that there exists replicated spare data corresponding to the replicated data set as the master data, sets the replicated spare data as replicated data.

7. The data management device according to claim 5, wherein

the setting unit causes the transmitting unit to transmit a replication instruction to make a memory, other than a memory that stores the data which has been set as the master data, replicate the data which has been set as the master data and store the replicated data.

8. A data managing method executed using a data management device accessible to a plurality of memories, the method comprising:

receiving warning messages from the plurality of memories;

determining a risk of failure associated with each memory of the plurality of memories on the basis of the received warning messages;

selecting a memory from among the plurality of memories on the basis of the determined risk, the selected memory storing data to be replicated; and

transmitting a replication instruction to the selected memory, the replication instruction causes replication of the data to be replicated in another memory of the plurality of memories.

9. The method according to claim 8, further comprising:

maintaining a list ranking the plurality of memories based on the determined risk, and wherein

the selecting selects a highest ranked memory as the selected memory, the highest ranked memory corresponding to the memory most likely to fail.

10. The method according to claim 8, wherein

the transmitting the replication instruction is executed when at least one of the risk of failure determined is higher than a predetermined value.

11. The method according to claim 8, further comprising:

ascertaining the another memory to which the replication instruction is transmitted on the basis of at least one of the determined risk and an amount of free capacity of each memory.

12. A computer readable storage medium storing a data management program to be executed, by a data management device accessible to a plurality of memories, execution of the program causing the data management device to perform a process comprising:

receiving warning messages from the plurality of memories;

determining a risk of failure associated with each memory of the plurality of memories on the basis of the received warning messages;

selecting a memory from among the plurality of memories on the basis of the determined risk, the selected memory storing data to be replicated; and

transmitting a replication instruction to the selected memory, the replication instruction causes replication of the data to be replicated in another memory of the plurality of memories.

13. The storage medium according to claim 12, the program further causing the data management device to perform:

maintaining a list ranking the plurality of memories based on the determined risk, and wherein

the selecting selects a highest ranked memory as the selected memory, the highest ranked memory corresponding to the memory most likely to fail.

14. The storage medium according to claim 12, wherein

the transmitting the replication instruction is executed when at least one of the risk of failure determined is higher than a predetermined value.

15. The storage medium according to claim 12, the program further causing the data management device to perform:

ascertaining the another memory to which the replication instruction is transmitted on the basis of at least one of the determined risk and an amount of free capacity of each memory.