Information processing system, information processing apparatus, and information processing apparatus control method

• US 10,445,189 B2
• Filed: 04/20/2016
• Issued: 10/15/2019
• Est. Priority Date: 06/18/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Masuda, Kouji, Yoshida, Akimasa, Kobashi, Kazunori
• Primary Examiner(s): Shanmugasundaram, Kannan
• Application Number:
  US15/133,253
• Publication Number:
  US 20160371151A1
• Time in Patent Office: 1,273 Days
• CPC Class Codes: G06F 11/00 Error detection; Error correction; Monitoring error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/2094 Redundant storage or storage space G06F11/2056 takes precedence
• CPC Class Codes: G06F 11/2097 maintaining the standby controller/processing unit updated initialisation or re-synchronisation thereof G06F11/1658 and subgroups
• CPC Class Codes: G06F 16/119 Details of migration of file systems migration mechanisms in storage systems G06F3/0647
• CPC Class Codes: G06F 16/214 Database migration support
• CPC Class Codes: G06F 16/2365 Ensuring data consistency and integrity
• CPC Class Codes: G06F 16/27 Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
• CPC Class Codes: G06F 16/955 using information identifiers, e.g. uniform resource locators [URL]
• CPC Class Codes: G06F 2201/80 Database-specific techniques
• CPC Class Codes: G06F 2201/835 Timestamp
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0647 Migration mechanisms
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

A metadata processing unit acquires the first metadata from a first data storing unit at a first frequency and makes a second data storing unit store the first metadata. A file data processing unit specifies, based on the update history of the first metadata, second metadata that is updated on and after the last acquisition date and time of second file data stored in the second data storing unit, acquires the first file data associated with the specified management data at a second frequency that is lower than the first frequency, and makes the second data storing unit store the first file data. A switching unit switches a read/write process that is performed by using the operation data stored in the first data storing unit such that the read/write process is performed by using the second metadata and the second file data in the second data storing unit.

Claims

1. An information processing system comprising:

a first information processing apparatus;

a second information processing apparatus; and

an operation management device, wherein

the first information processing apparatus includes

a first storage that stores therein operation data in which management data that includes therein update date and time and actual data that is associated with the management data are held, and

a first processor coupled to the first storage,

the second information processing apparatus includes

a second storage, and

a second processor coupled to the second storage and configured to

acquire the management data from the first storage at a first frequency and make the second storage store the acquired management data, and

specify, based on an update history of the management data acquired, the management data that is updated on and after the last acquisition date and time of the actual data stored in the second storage, acquire the actual data associated with the specified management data from the first storage at a second frequency that is lower than the first frequency, and make the second storage store the acquired actual data, and

the operation management device includes

a priority storage, and

a processor coupled to the priority storage and configured to

switch a read and write process that is performed by using the operation data stored in the first storage such that the read and write process is performed by using the management data and the actual data that are stored in the second storage,

receive, at the time of migration, a notification indicating that distribution of a synchronization policy has been completed, instruct the first information processing apparatus that is a switching source and the second information processing apparatus that is a switching destination to start the migration, and receive a switching completion notification from the second information processing apparatus that is the switching destination of the migration,

the first processor is further configured to save an update history of the management data that is stored in the first storage, and

the second processor is further configured to specify, at the time of switching performed, based on the update history saved and the update history of the management data acquired, the management data that has not been updated and acquire the specified management data,

the second information processing apparatus includes a synchronization agent that, when the management data that has not been updated is present at the time of the switching, compares a management data update list with a management data update difference, and specifies the management data that is not updated at the time of the switching.

2. The information processing system according to claim 1, further comprising a third information processing apparatus that includes

a third storage, and

a third processor coupled to the third storage and configured to

acquire the management data from the second storage at a third frequency and make the third storage store the acquired management data, and

specify, based on an update history of the management data acquired, the management data that is updated on and after the last acquisition date and time of the actual data stored in the third storage, acquire the actual data associated with the specified management data from the second storage at a fourth frequency that is lower than the third frequency, and make the third storage store the acquired actual data.

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

a plurality number of the second information processing apparatuses is present,

the priority storage stores therein the priority of each of the second information processing apparatuses, and

based on the priority, the first frequency and the second frequency that are used are notified to each of the second information processing apparatuses.

4. The information processing system according to claim 1, wherein

the first frequency corresponds to a frequency of synchronization of metadata when the first information processing apparatus is used as a synchronization source and the second information processing apparatus is used as a synchronization destination, and

the second frequency corresponds to the frequency of synchronization of file data when the first information processing apparatus is used as the synchronization source and the second information processing apparatus is used as the synchronization destination.

5. An information processing apparatus comprising:

a processor configured to

acquire, from a first storage that stores therein operation data in which management data that includes therein update date and time and actual data that is associated with the management data are held, the management data at a first frequency and make a second storage store the acquired management data;

specify, based on an update history of the management data acquired, the management data that is updated on and after the last acquisition date and time of the actual data stored in the second storage, acquire the actual data associated with the specified management data from the first storage at a second frequency that is lower than the first frequency, and make the second storage store the acquired actual data;

receive, at the time of migration, a notification indicating that distribution of a synchronization policy has been completed, instruct a first information processing apparatus that is a switching source and a second information processing apparatus that is a switching destination to start the migration, and receive a switching completion notification from the second information processing apparatus that is the switching destination of the migration,

the first information processing apparatus is further configured to save an update history of the management data that is stored in the first storage, and

the second information processing apparatus is further configured to specify, at the time of switching performed, based on the update history saved and the update history of the management data acquired, the management data that has not been updated and acquire the specified management data,

the second information processing apparatus includes a synchronization agent that, when the management data that has not been updated is present at the time of the switching, compares a management data update list with a management data update difference, and specifies the management data that is not updated at the time of the switching.

6. The information processing apparatus according to claim 5, wherein a read and write process that is performed by using the operation data stored in the first storage is performed by using the management data and the actual data that are stored in the second storage.

7. The information processing apparatus according to claim 5, wherein the first storage is provided in another information processing apparatus that acquires, at a third frequency, operation data stored in a third storage that is different from the first storage and the second storage, that makes the first storage store the acquired operation data, that specifies, based on an update history of the management data in the first storage, the management data that is updated on and after the last acquisition date and time of the actual data stored in the first storage, that acquires the actual data associated with the specified management data from the third storage at a fourth frequency that is lower than the third frequency, and that makes the first storage store the acquired actual data.

8. An information processing apparatus control method comprising:

acquiring, from a first storage that stores therein operation data in which management data that includes therein update date and time and actual data that is associated with the management data are held, the management data at a first frequency;

storing, performed by a second storage, the acquired management data;

saving an update history of the management data that is stored in the second storage;

holding the last update date and time on which the actual data acquired from the first storage is made to be stored by the second storage;

specifying, based on the update history, the management data that is updated on and after the last acquisition date and time at a second frequency that is lower than the first frequency, by a processor;

acquiring the actual data associated with the specified management data;

storing, performed by the second storage, the acquired actual data;

receiving, at the time of migration, a notification indicating that distribution of a synchronization policy has been completed, instructing a first information processing apparatus that is a switching source and a second information processing apparatus that is a switching destination to start the migration, and receiving a switching completion notification from the second information processing apparatus that is the switching destination of the migration,

the first information processing apparatus is further configured to save an update history of the management data that is stored in the first storage, and

the second information processing apparatus is further configured to specify, at the time of switching performed, based on the update history saved and the update history of the management data acquired, the management data that has not been updated and acquire the specified management data,

the second information processing apparatus includes a synchronization agent that, when the management data that has not been updated is present at the time of the switching, compares a management data update list with a management data update difference, and specifies the management data that is not updated at the time of the switching.