STORAGE SYSTEM, STORAGE APPARATUS, AND CONTROL METHOD FOR STORAGE SYSTEM

• US 20090228610A1
• Filed: 01/08/2009
• Published: 09/10/2009
• Est. Priority Date: 03/10/2008
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: UCHIDA, Tsuyoshi
• Application Number:
  US12/350,289
• Publication Number:
  US 20090228610A1
• Time in Patent Office: Days
• US Class Current: 710/5
• CPC Class Codes: G06F 13/387 for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0629 Configuration or reconfiguration of storage systems
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H04L 67/1097 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]

Abstract

The storage apparatus has a detecting unit that detects the number of a server connecting to the storage apparatus, a determining unit that determines the change of the set upper limit value set for the server on the basis of the number of the server detected by the detecting unit, and a notifying unit that performs change notification regarding the change of the set upper limit value determined by the determining unit to the server. The server has a change notification receiving unit that receives the change notification from the notifying unit, and a changing unit that changes the set upper limit value set for the server on the basis of the change notification received by the change notification receiving unit.

Claims

1. A storage system comprising:

a server for setting set upper limit value of the number of issuable commands; and

a storage apparatus for processing the commands issued by the server,

the storage apparatus including;

a detecting unit for detecting the number of the server connecting to the storage apparatus;

a determining unit for determining the change of the set upper limit value set for the server on the basis of the number of the server detected by the detecting unit; and

a notifying unit for performing change notification regarding the change of the set upper limit value determined by the determining unit to the server, and

the server including;

a change notification receiving unit for receiving the change notification from the notifying unit; and

a changing unit for changing the set upper limit value set for the server on the basis of the change notification received by the change notification receiving unit.

2. The storage system according to claim 1, wherein the storage apparatus further includes a command receiving unit that receives a command issued by the server, wherein the determining unit changes the set upper limit value on the basis of the communication state between the command receiving unit and the server.

3. The storage system according to claim 2, wherein the communication state is the number of commands received by the command receiving unit within a predetermined period of time.

4. The storage system according to claim 2, wherein the communication state is the status of use of a buffer, which is obtained along with the command received by the command receiving unit.

5. The storage system according to claim 2, further comprising a plurality of the servers, wherein the determining unit determines the change of the set upper limit value set for each of the plurality of servers on the basis of the communication states between the command receiving unit and the plurality of servers, and the notifying unit performs the change notification to at least one of the plurality of servers.

6. A storage apparatus for processing a command issued by a server for setting set upper limit value of the number of issuable commands, the apparatus comprising:

a detecting unit for detecting the number of the server connecting to the storage apparatus;

a determining unit for determining the change of the set upper limit value set for the server on the basis of the number of the server detected by the detecting unit; and

a notifying unit for performing change notification regarding the change of the set upper limit value determined by the determining unit to the server.

7. The storage apparatus according to claim 6, further comprising a command receiving unit that receives the command issued by the server, wherein:

the determining unit changes the set upper limit value on the basis of the communication state between the command receiving unit and the server.

8. The storage apparatus according to claim 7, wherein the communication state is the number of commands received by the command receiving unit within a predetermined period of time.

9. The storage apparatus according to claim 7, wherein the communication state is the status of use of a buffer, which is obtained along with the command received by the command receiving unit.

10. The storage apparatus according to claims 7, wherein the determining unit determines the change of the set upper limit value set for each of a plurality of the servers on the basis of the communication states between the command receiving unit and the plurality of servers, and the notifying unit performs the change notification to at least one of the plurality of servers.

11. A control method for a storage system, the method comprising the step of:

providing a server for setting set upper limit value of the number of issuable commands;

providing a storage apparatus for processing the commands issued by the server;

detecting the number of the server connecting to the storage apparatus;

determining step of determining the change of the set upper limit value set for the server on the basis of the number of the server detected by the detecting step; and

notifying step of performing change notification regarding the change of the set upper limit value determined by the determining step to the server.

12. The control method for the storage system according to claim 11, further comprising a command receiving step of receiving a command issued by the server, wherein the determining step changes the set upper limit value on the basis of the communication state between the command receiving unit and the server.

13. The control method for the storage system according to claim 12, wherein the communication state is the number of commands received by the command receiving step within a predetermined period of time.

14. The control method for the storage system according to claim 12, wherein the communication state is the status of use of a buffer, which is obtained along with the command received by the command receiving step.

15. The control method for the storage system according to claims 12, wherein the determining step determines the change of the set upper limit value set for each of a plurality of the servers on the basis of the communication states between the command the storage apparatus and the plurality of servers, and the notifying step performs the change notification to at least one of the plurality of servers.