SYSTEM PROVIDED WITH COMPUTER AND STORAGE APPARATUS AND METHOD FOR CONTROL OF SYSTEM

• US 20180246824A1
• Filed: 12/09/2015
• Published: 08/30/2018
• Est. Priority Date: 12/09/2015
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: TAKADA, Aritoki, ARITSUKA, Toshiyuki, HAYASHI, Shinichi
• Application Number:
  US15/754,891
• Publication Number:
  US 20180246824A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 11/2028 eliminating a faulty processor or activating a spare
• CPC Class Codes: G06F 11/2046 where the redundant components share persistent storage G06F11/2043 takes precedence
• CPC Class Codes: G06F 13/10 Program control for peripheral devices G06F13/14 - G06F13/42 take precedence
• CPC Class Codes: G06F 13/20 for access to input/output bus
• CPC Class Codes: G06F 2201/84 Using snapshots, i.e. a logical point-in-time copy of the data
• CPC Class Codes: G06F 2213/0026 PCI express
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0683 Plurality of storage devices
• CPC Class Codes: G06F 9/5027 the resource being a machine, e.g. CPUs, Servers, Terminals

Abstract

A system including a computer provided with a memory configured to store a program and a first CPU (central processing unit) configured to execute the program and a storage apparatus provided with a drive coupled to the computer to store data and a second CPU configured to control storage of data in the drive according to an IO request issued by the program. The first CPU transmits an IO proposed plan which is information on the IO request to be issued by the program to the storage apparatus. The second CPU determines to adopt the IO proposed plan based on a resource utilization rate of the storage apparatus when the process of the IO request to be issued is executed and transmits a notification indicating the adopted IO proposed plan to the computer. The first CPU issues an IO request relating to the IO proposed plan based on the notification.

Claims

1. A system comprising:

a computer comprising a memory configured to store a program and a first CPU (central processing unit) configured to execute the program; and

a storage apparatus comprising a drive coupled to the computer to store data and a second CPU configured to control storage of data in the drive according to an IO (input/output) request issued by the program, wherein

the first CPU is configured to transmit an IO proposed plan which is information on the IO request to be issued by the program to the storage apparatus,

the second CPU is configured to determine to adopt the IO proposed plan based on a resource utilization rate of the storage apparatus when the process of the IO request to be issued is executed and transmit a notification indicating the adopted IO proposed plan to the computer, and

the first CPU is configured to issue an IO request relating to the IO proposed plan based on the notification.

2. The system according to claim 1, wherein

the first CPU is configured to transmit a plurality of the IO proposed plans as an IO proposed plan list to the storage apparatus, and

the second CPU is configured to select the IO proposed plan adopted from the IO proposed plan list.

3. The system according to claim 2, wherein

a response time limit is configured in the IO proposed plan list,

the second CPU is configured to select, upon receiving the first IO proposed plan list, the IO proposed plan to be adopted from a first IO proposed plan list,

reselect, after receiving the first IO proposed plan list and upon receiving a second IO proposed plan list before the response time limit of the first IO proposed plan list, the IO proposed plan to be adopted from the first IO proposed plan list, select the IO proposed plan to be adopted from the second IO proposed plan list, and

transmit, when the response time limit of the first IO proposed plan list is reached, a notification indicating adoption of the selected IO proposed plan among the IO proposed plans included in the first IO proposed plan list to the computer.

4. The system according to claim 2, wherein

the IO proposed plan comprises information on resources of the storage apparatus necessary to process the IO request to be issued,

the first CPU is configured to calculate resources of the storage apparatus necessary to process the IO request to be issued based on an operation situation of the program, configuration information of the program and information on the resources used by the program.

5. The system according to claim 4, wherein

the IO proposed plan list comprises a first IO proposed plan and a second IO proposed plan,

the first IO proposed plan is a plan configured to reserve resources of the storage apparatus necessary to process a first data write request and resources of the storage apparatus necessary to process a data read request for recovery from a failure, and

the second IO proposed plan is a plan configured to reserve resources of the storage apparatus necessary to process a data read request for recovery from a failure without issuing any write request of the first data.

6. The system according to claim 5, wherein

the configuration information comprises information on an SLO (service level objective),

the first CPU is configured to record a log of processes executed by the program, and

calculate resources of the storage apparatus necessary to process a data read request for recovery from a failure so that the sum of a time required to reapply the process recorded in the log to the read data and a time required to read data for recovery from the failure does not exceed the SLO.

7. A method for control of a system, the system comprising:

a computer comprising a memory configured to store a program and a first CPU (central processing unit) configured to execute the program; and

a storage apparatus comprising a drive coupled to the computer to store data and a second CPU configured to control storage of data in the drive according to an IO (input/output) request issued by the program, the method comprising;

creating an IO proposed plan which is information on an IO request to be issued by the program in the storage apparatus;

determining to adopt the IO proposed plan based on a resource utilization rate of the storage apparatus when the process of the IO request to be issued is executed; and

issuing an IO request associated with the IO proposed plan based on the determination.

8. The method for control of a system according to claim 7, wherein an IO proposed plan list comprising a plurality of the IO proposed plans are created and the IO proposed plan to be adopted is adopted and selected from the IO proposed plan list.

9. The method for control of a system according to claim 8, wherein

a response time limit is configured in the IO proposed plan list,

when a first IO proposed plan list is received, the IO proposed plan to be adopted is selected from the first IO proposed plan list,

after the first IO proposed plan list is received, if a second IO proposed plan list is received before the response time limit of the first IO proposed plan list, the IO proposed plan to be adopted is reselected from the first IO proposed plan list and the IO proposed plan to be adopted is selected from the second IO proposed plan list, and

when the response time limit of the first IO proposed plan list is reached, a notification indicating an adoption of the selected IO proposed plan among the IO proposed plans included in the first IO proposed plan list is sent to the computer.

10. The method for control of a system according to claim 8, wherein

the IO proposed plan comprises information on resources of the storage apparatus necessary to process the IO request to be issued, and

the resources of the storage apparatus necessary to process the IO request to be issued are calculated based on an operation situation of the program, configuration information of the program and information on resources used by the program.

11. The method for control of a system according to claim 10, wherein

the IO proposed plan list comprises a first IO proposed plan and a second IO proposed plan,

the first IO proposed plan is a plan configured to reserve resources of the storage apparatus necessary to process a first data write request and resources of the storage apparatus necessary to process a data read request for recovery from a failure, and

the second IO proposed plan is a plan configured to reserve resources of the storage apparatus necessary to process a data read request for recovery from a failure without issuing the first data write request.

12. The method for control of a system according to claim 11, wherein

the configuration information comprises information on an SLO (service level objective),

the computer is configured to record a log of a process executed by the program, and

calculate resources of the storage apparatus necessary to process a data read request for recovery from a failure so that the sum of a time required to reapply the process recorded in the log to the read data and a time required to read data for recovery from the failure does not exceed the SLO.