CONTENTS DELETION/UPDATE APPARATUS, CONTENTS DELETION/UPDATE METHOD AND RECORDING MEDIUM

• US 20100114949A1
• Filed: 10/14/2009
• Published: 05/06/2010
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sakamoto, Takuya
• Granted Patent: US 8,359,330 B2
• Time in Patent Office: Days
• US Class Current: 707/770
• CPC Class Codes: G06F 16/162 Delete operations erasing in storage systems G06F3/0652
• CPC Class Codes: G06F 16/1834 implemented based on peer-to-peer networks, e.g. gnutella p2p communication protocols H04L67/104

Abstract

A contents deletion/update system includes plural nodes which delete or update contents shared by the plural nodes mutually connected via a network.

A management node includes a first transmitter transmitting an instruction to cause another node to delete or update the contents based on owning node information, and a second transmitter transmitting non-responding node information when there is a non-responding node.

Each of the other nodes includes the first receiver receiving an instruction to delete or update the contents, an editor deleting or updating the contents according to the instruction, the first transmitter transmitting a response to the management node, the second receiver receiving non-responding node information from the management node and storing the non-responding node information in a storage unit, and the second transmitter transmitting the instruction to the non-responding node based on the non-responding node information when recognizing that the non-responding node makes access.

Claims

1. A computer-readable recording medium storing a computer program for causing a computer to function as a node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the computer program causing the computer to execute:

transmitting a deletion/update instruction to cause the nodes owning the contents to delete or update the contents based on owning node information indicating owning nodes which own the contents; and

transmitting, to a responding node that sends back a response to the deletion/update instruction, non-responding node information indicating a non-responding node, if there is any non-responding node that does not respond to the deletion/update instruction.

3. A computer-readable recording medium storing the computer program according to claim 1, the computer program causing the computer to further execute:

judging whether a ratio of a number of nodes from which the response is received to a number of nodes to which the instruction is transmitted is equal to or more than a given threshold;

retransmitting the deletion/update instruction to the non-responding node after a given period passes when the ratio is judged to be less than the given threshold; and

transmitting the non-responding node information when the ratio is judged to be equal to or more than the threshold.

4. A computer-readable recording medium storing the computer program according to claim 1, the computer program causing the computer to further execute:

deleting the non-responding node from the non-responding node information when receiving a notification that the non-responding node responds to a deletion/update instruction from the responding node; and

transmitting the updated non-responding node information to the responding node.

6. A computer-readable recording medium storing the computer program according to claim 1, the computer program causing the computer to further execute:

generating response node information indicating the responding node; and

transmitting the response node information to the responding nodes to which the non-responding node information is transmitted.

8. The computer-readable recording medium storing the computer program according to claim 1, wherein

the non-responding node information further includes a condition for stopping transmission of the deletion/update instruction to the non-responding node.

9. The computer-readable recording medium storing the computer program according to claim 3, wherein

the non-responding node information further includes a condition for stopping transmission of the deletion/update instruction to the non-responding node.

10. The computer-readable recording medium storing the computer program according to claim 4, wherein

the non-responding node information further includes a condition for stopping transmission of the deletion/update instruction to the non-responding node.

11. The computer-readable recording medium storing the computer program according to claim 6, wherein

the non-responding node information further includes a condition for stopping transmission of the deletion/update instruction to the non-responding node.

15. The computer-readable recording medium storing the computer program according to claim 1, the computer program causing the computer to further execute:

transmitting the non-responding node information to a node when the node is a node other than the responding node in the network and is likely to communicate with the non-responding node.

2. A computer-readable recording medium storing a computer program for causing a computer to function as a node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the computer program causing the computer to execute:

receiving a deletion/update instruction to delete or update the contents from a management node holding owning node information indicating nodes which own the contents;

deleting or updating the contents in accordance with the deletion/update instruction and transmitting a response to the management node;

receiving, from the management node, non-responding node information indicating a non-responding node that does not respond to the deletion/update instruction and storing the non-responding node information in a storage unit; and

when recognizing that there is access from the non-responding node, transmitting the deletion/update instruction to the non-responding node that makes access based on the non-responding node information stored in the storage unit.

5. A computer-readable recording medium storing the computer program according to claim 2, the computer program causing the computer to further execute:

deleting the non-responding node from the non-responding node information stored in the storage unit when receiving a response from the non-responding node to which the deletion/update instruction is transmitted; and

transmitting a notification that a response has been received from the non-responding node to the management node.

7. A computer-readable recording medium storing the computer program according to claim 2, the computer program causing the computer to further execute:

storing the responding node information in the storage unit when receiving responding node information indicating the responding nodes from the management node;

deleting the non-responding node from the non-responding node information stored in the storage unit and transmitting the updated non-responding node information to other responding nodes described in the responding node information when receiving a response from the non-responding node to which the deletion/update instruction is transmitted; and

storing the received non-responding node information again in the storage unit when receiving the updated non-responding node information.

12. The computer-readable recording medium storing the computer program according to claim 2, the computer program causing the computer to further execute:

storing a condition in the storage unit when receiving, from the management node, a stop condition for stopping transmission of the deletion/update instruction to the non-responding node; and

stopping to transmit the deletion/update instruction to the responding node when an access by the non-responding node occurs and the stop condition stored in the storage unit is satisfied.

13. The computer-readable recording medium storing the computer program according to claim 5, the computer program causing the computer to further execute:

storing a condition in the storage unit when receiving, from the management node, a stop condition for stopping transmission of the deletion/update instruction to the non-responding node; and

stopping to transmit the deletion/update instruction to the responding node when an access from the non-responding node occurs and the stop condition stored in the storage unit is satisfied.

14. The computer-readable recording medium storing the computer program according to claim 7, the computer program causing the computer to further execute:

storing a condition in the storage unit when receiving, from the management node, a stop condition for stopping transmission of the deletion/update instruction to the non-responding nodes; and

stopping to transmit the deletion/update instruction to the responding node when an access from the non-responding node occurs and the stop condition stored in the storage unit is satisfied.

16. A contents deletion/update system which includes a plurality of nodes that delete or update contents shared by the plurality of nodes mutually connected via a network, the contents deletion/update system comprising:

one management node including;

a first transmitter transmitting a deletion/update instruction to cause a node owning the contents to delete or update the contents based on owning node information depicting an owning node which own the contents, and

a second transmitter transmitting, when there is a non-responding node that does not respond to the deletion/update instruction, non-responding node information indicating the non-responding node to a responding node that has responded to the deletion/update instruction;

and

other nodes each including;

a first receiver receiving, from a management node, a deletion/update instruction to delete or update the contents holding owning node information indicating nodes which own the contents,

an editor deleting or updating the contents in accordance with the deletion/update instruction, and a transmitter transmitting a response to the management node,

a second receiver receiving non-responding node information indicating the non-responding nodes that do not respond to the deletion/update instruction from the management node, and storing the non-responding node information in a storage unit, and

a transmitter transmitting the deletion/update instruction to the non-responding node that makes an access based on the non-responding node information stored in the storage unit, when recognizing that the non-responding node makes the access.

17. A node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the node comprising:

a first transmitter transmitting a deletion/update instruction to cause a node owning the contents to delete or update the contents based on owning node information indicating an owning node which owns the contents; and

a second transmitter transmitting, when there is a non-responding node that does not respond to the deletion/update instruction, non-responding node information indicating the non-responding node to a responding node that responds to the deletion/update instruction.

18. A node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the node comprising:

a first receiver receiving a deletion/update instruction to delete or update the contents from a management node holding owning node information indicating a node which owns the contents,

an editor deleting or updating the contents in accordance with the deletion/update instruction, and a transmitter transmitting a response to the management node,

a second receiver receiving, from the management node, non-responding node information indicating the non-responding nodes that do not respond to the deletion/update instruction, and storing the non-responding node information in a storage unit, and

when recognizing that the non-responding node makes access, a transmitter transmitting the deletion/update instruction to the non-responding node that makes access based on the non-responding node information stored in the storage unit.

19. A method that causes a computer to function as a node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the method causing the computer to execute:

transmitting a deletion/update instruction to cause a node owning the contents to delete or update the contents based on owning node information indicating an owning node which owns the contents; and

transmitting, when there is a non-responding node that does not respond to the deletion/update instruction, non-responding node information indicating the non-responding node to a responding node that responds to the deletion/update instruction.

20. A method that causes a computer to function as a node which deletes or updates contents shared by a plurality of nodes mutually connected via a network, the method causing the computer to execute:

receiving a deletion/update instruction to delete or update the contents from a management node holding owning node information indicating a node which owns the contents,

deleting or updating the contents in accordance with the deletion/update instruction, and transmitting a response to the management node,

receiving non-responding node information indicating the non-responding node that does not respond to the deletion/update instruction from the management node, and storing the non-responding node information in a storage unit, and

when recognizing that the non-responding node makes access, transmitting the deletion/update instruction to the non-responding node that makes access based on the non-responding node information stored in the storage unit.