RELAY APPARATUS AND RELAY MANAGEMENT APPARATUS

• US 20120151493A1
• Filed: 10/14/2011
• Published: 06/14/2012
• Est. Priority Date: 12/10/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TAKASE, Masaaki
• Granted Patent: US 8,984,522 B2
• Time in Patent Office: Days
• US Class Current: 718/104
• CPC Class Codes: G06F 9/5083 Techniques for rebalancing the load in a distributed system

Abstract

A relay apparatus executes a reallocation process so as to transfer data received from an information processing apparatus allocated to the relay apparatus to a destination apparatus. The reallocation process includes the following operations. The relay apparatus determines reallocatability of the information processing apparatus on the basis of a status of receiving transfer data from the information processing apparatus. The reallocatability represents whether the information processing apparatus is reallocatable to another apparatus. The relay apparatus stores reallocatability information indicating the determined reallocatability in a storage unit. The relay apparatus determines whether to reallocate the information processing apparatus on the basis of the reallocatability information stored in the storage unit. The relay apparatus reallocates the information processing apparatus determined to be reallocated.

Claims

1. A computer-readable, non-transitory medium storing a program that causes a relay apparatus to execute a reallocation process, the relay apparatus transferring data received from an information processing apparatus allocated to the relay apparatus to a destination apparatus, the reallocation process comprising:

determining reallocatability of the information processing apparatus on the basis of a status of receiving transfer data from the information processing apparatus, the reallocatability representing whether the information processing apparatus is reallocatable to another apparatus;

storing reallocatability information indicating the determined reallocatability in a storage unit;

determining whether to reallocate the information processing apparatus on the basis of the reallocatability information stored in the storage unit; and

reallocating the information processing apparatus determined to be reallocated.

2. The computer-readable, non-transitory medium according to claim 1, the reallocation process further comprising:

storing in the storage unit, upon receiving transfer data from the information processing apparatus, transfer amount information indicating an amount of the received transfer data; and

determining the reallocatability as nonreallocatable when a value indicating variation of the amounts of transfer data exceeds a predetermined threshold.

3. The computer-readable, non-transitory medium according to claim 1, the reallocation process further comprising:

determining the reallocatability as nonreallocatable while receiving transfer data from the information processing apparatus.

4. The computer-readable, non-transitory medium according to claim 1, the reallocation process further comprising:

determining the reallocatability as nonreallocatable when a failure has occurred while receiving transfer data from the information processing apparatus.

5. A computer-readable, non-transitory medium storing a program that causes a relay management apparatus to execute a reallocation process, the relay management apparatus managing a plurality of relay apparatuses including a first relay apparatus transferring data received from one of information processing apparatuses allocated to the first relay apparatus to a destination apparatus, the reallocation process comprising:

determining reallocatability of each information processing apparatus allocated to the first relay apparatus on the basis of a status, in the first relay apparatus, of receiving transfer data from the each information processing apparatus, the reallocatability representing whether the each information processing apparatus is reallocatable to a relay apparatus other than the first relay apparatus;

storing reallocatability information indicating the determined reallocatability of the each information processing apparatus in a storage unit;

selecting, upon receiving a request for reallocation from the first relay apparatus, an information processing apparatus to be reallocated on the basis of the reallocatability information stored in the storage unit;

selecting, from among the plurality of relay apparatuses, a second relay apparatus to which the selected information processing apparatus is reallocated; and

reallocating the selected information processing apparatus to the second relay apparatus.

6. The computer-readable, non-transitory medium according to claim 5, the reallocation process further comprising:

storing in the storage unit, upon the first relay apparatus receiving transfer data from the information processing apparatus, transfer amount information indicating an amount of the received transfer data; and

determining the reallocatability as nonreallocatable when a value indicating variation of the amounts of transfer data exceeds a predetermined threshold.

7. The computer-readable, non-transitory medium according to claim 5, the reallocation process further comprising:

determining the reallocatability of the each information processing apparatus as nonreallocatable while the first relay apparatus receiving transfer data from the each information processing apparatus.

8. The computer-readable, non-transitory medium according to claim 5, the reallocation process further comprising:

determining the reallocatability of the each information processing apparatus as nonreallocatable when a failure has occurred in the first relay apparatus while receiving transfer data from the each information processing apparatus.

9. The computer-readable, non-transitory medium according to claim 5, the reallocation process further comprising:

receiving load information indicating a status of loads for each of the plurality of relay apparatuses;

storing the received load information in the storage unit; and

selecting the second relay apparatus having loads smaller than loads of other relay apparatuses on the basis of the stored load information.

10. The computer-readable, non-transitory medium according to claim 5, the reallocation process further comprising:

receiving large-variation load information indicating a status of large-variation loads for each of the plurality of relay apparatuses, the large-variation loads being loads for processing large-variation transfer data, wherein variation of amounts of the large-variation transfer data exceeds a predetermined threshold;

storing the received large-variation load information in the storage unit; and

selecting the second relay apparatus having large-variation loads smaller than large-variation loads of other relay apparatuses on the basis of the stored large-variation load information.

11. A relay apparatus for transferring data received from an information processing apparatus allocated to the relay apparatus to a destination apparatus, the relay apparatus comprising:

a storage unit for storing reallocatability information indicating reallocatability of the information processing apparatus, the reallocatability representing whether the information processing apparatus is reallocatable to another apparatus; and

a processor to

determine the reallocatability of the information processing apparatus on the basis of a status of receiving transfer data from the information processing apparatus,

store reallocatability information indicating the determined reallocatability in the storage unit,

determine whether to reallocate the information processing apparatus on the basis of the reallocatability information stored in the storage unit, and

reallocate the information processing apparatus determined to be reallocated.

12. A relay management apparatus for managing a plurality of relay apparatuses including a first relay apparatus transferring data received from one of information processing apparatuses allocated to the first relay apparatus to a destination apparatus, the relay management apparatus comprising:

a storage unit for storing reallocatability information indicating reallocatability of each information processing apparatus, the reallocatability representing whether the each information processing apparatus is reallocatable to a relay apparatus other than the first relay apparatus; and

a processor to

determine the reallocatability of the each information processing apparatus allocated to the first relay apparatus on the basis of a status, in the first relay apparatus, of receiving transfer data from the each information processing apparatus,

store reallocatability information indicating the determined reallocatability of the each information processing apparatus in the storage unit,

select, upon receiving a request for reallocation from the first relay apparatus, an information processing apparatus to be reallocated on the basis of the reallocatability information stored in the storage unit,

select, from among the plurality of relay apparatuses, a second relay apparatus to which the selected information processing apparatus is reallocated, and

reallocate the selected information processing apparatus to the second relay apparatus.