INFORMATION PROCESSING DEVICE, STORAGE PROCESSING METHOD, AND COMPUTER READABLE RECORDING MEDIUM HAVING PROGRAM STORED THEREIN

• US 20140173233A1
• Filed: 11/08/2013
• Published: 06/19/2014
• Est. Priority Date: 12/19/2012
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: HIGASHIYAMA, Takashi
• Granted Patent: US 9,152,329 B2
• Time in Patent Office: Days
• US Class Current: 711/162
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/0778 Dumping, i.e. gathering error/state information after a fault for later diagnosis
• CPC Class Codes: G06F 11/1441 Resetting or repowering
• CPC Class Codes: G06F 11/2015 Redundant power supplies power supply failure G06F1/30
• CPC Class Codes: G06F 16/2343 Locking methods, e.g. distributed locking or locking implementation details
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0674 Disk device

Abstract

An information processing device includes: a calculator that calculates the number of pages used for storing management information in a first storage medium; a storage processor that sets pages corresponding to the calculated number of pages as free pages and stores the management information in the set free pages to thereby store the management information in the first storage medium; and an update processor that performs a process of updating position management information that indicates a storage position of the management information in the first storage medium. The information processing device can quickly write out logs on a memory.

Claims

1. An information processing device comprising:

a first storage medium;

a calculator that calculates the number of pages used for storing management information in the first storage medium;

a storage processor that sets pages corresponding to the calculated number of pages as free pages and stores the management information in the set free pages to thereby store the management information in the first storage medium; and

an update processor that performs a process of updating position management information that indicates a storage position of the management information in the first storage medium.

2. The information processing device according to claim 1, further comprising:

a second storage medium, wherein

the storage processor stores the management information in the second storage medium and stores the management information stored in the second storage medium in the free pages.

3. The information processing device according to claim 1, wherein

the calculator divides a data size of the management information by the size of the pages to calculate the number of pages.

4. The information processing device according to claim 1, further comprising:

a backup power supply that supplies power in a power-cut state of a main power supply, wherein

the calculator, the storage processor, and the update processor perform functions while the backup power supply supplies power.

5. The information processing device according to claim 4, wherein

one page that has already been assigned to the management information is assigned to new management information to update the position management information according to the assignment,

the new management information is stored in the one page to store the management information in the first storage medium, and

when a predicted time required for a process of storing the management information in the first storage medium when the position management information was updated according to the storing is equal to or longer than a time allocatable to storing of the management information in the first storage medium within a remaining discharge time of the backup power supply, the calculator, the storage processor, and the update processor perform the process of storing the management information in the first storage medium.

6. A storage processing method of storing management information in a first storage medium, the method comprising:

calculating the number of pages used for storing the management information in a first storage medium;

setting pages corresponding to the calculated number of pages as free pages and storing the management information in the set free pages to thereby store the management information in the first storage medium; and

updating position management information that indicates a storage position of the management information in the first storage medium.

7. The storage processing method according to claim 6, further comprising:

storing the management information in a second storage medium and storing the management information stored in the second storage medium in the free pages.

8. The storage processing method according to claim 6, further comprising:

dividing a data size of the management information by the size of the pages to calculate the number of pages.

9. The storage processing method according to claim 6, wherein

the calculating of the number of pages, the storing of the management information in the first storage medium, and the updating of the position management information are performed while a backup power supply that supplies power in a power-cut state of a main power supply supplies power.

10. The storage processing method according to claim 9, further comprising:

assigning one page that has already been assigned to the management information to new management information to update the position management information according to the assignment; and

storing the new management information in the one page to store the management information in the first storage medium, wherein

when a predicted time required for a process of storing the management information in the first storage medium when the position management information was updated according to the storing is equal to or longer than a time allocatable to storing of the management information in the first storage medium within a remaining discharge time of the backup power supply, the calculating of the number of pages, the storing of the management information in the first storage medium, and the updating of the position management information are performed

11. A computer readable recording medium having stored therein a program for causing a computer to execute a process, the computer including a first storage medium;

the process comprising;

calculating the number of pages used for storing management information in the first storage medium;

setting pages corresponding to the calculated number of pages as free pages and storing the management information in the set free pages to thereby store the management information in the first storage medium; and

updating position management information that indicates a storage position of the management information in the first storage medium.

12. The computer readable recording medium according to claim 11, wherein

the process further comprises:

storing the management information in a second storage medium and storing the management information stored in the second storage medium in the free pages.

13. The computer readable recording medium according to claim 11, wherein

the process further comprises:

dividing a data size of the management information by the size of the pages to calculate the number of pages.

14. The computer readable recording medium according to claim 11, wherein

the calculating of the number of pages, the storing of the management information in the first storage medium, and the updating of the position management information are performed while a backup power supply that supplies power in a power-cut state of a main power supply supplies power.

15. The computer readable recording medium according to claim 14, wherein

the process further comprises:

assigning one page that has already been assigned to the management information to new management information to update the position management information according to the assignment; and

storing the new management information in the one page to store the management information in the first storage medium, and

when a predicted time required for a process of storing the management information in the first storage medium when the position management information was updated according to the storing is equal to or longer than a time allocatable to storing of the management information in the first storage medium within a remaining discharge time of the backup power supply, the calculating of the number of pages, the storing of the management information in the first storage medium, and the updating of the position management information are performed.