JP2018169979A - Storage array apparatus, storage system, storage array control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy performance required by a host terminal, extend service life, and suppress power consumption.SOLUTION: A storage array apparatus includes a storage array having a plurality of storage devices, and a control unit for controlling the storage array. The control unit executes the processing of: determining the number of storage devices to be active so that a data input/output flow-rate requested from a host terminal may satisfy a preset input/output flow-rate upper limit or input/output flow-rate lower limit; determining a presence of a first storage device exceeding a write threshold when the determined number of storage devices are active; and starting an inactive second storage device when the first storage is determined, migrating the data in the first storage device to the second storage device, and suspending the first storage device.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a storage array device, a storage system, a storage array control method, and a program.

  In a storage system using a storage array apparatus equipped with a storage array including a plurality of storage devices, an increase in power consumption of the entire system due to the addition of storage devices is a problem. Since there is an upper limit on the amount of power in the system installation location and rack, it is necessary to reduce the power consumption of the storage array device.

  As a power-saving technology that reduces the power consumption of storage array devices, in storage array devices equipped with storage arrays (disk arrays) that include multiple magnetic disks such as HDDs (Hard Disk Drives), the operation of magnetic disks is necessary. There is a MAID (Massive Array of Inactive Disks) technology that stops (see, for example, Patent Document 1). The MAID technology determines a magnetic disk that is not used and stops the operation of the magnetic disk to reduce power consumption. Normally, MAID technology stops the operation of all the magnetic disks that make up the storage array (pool), but if the storage array can be used even if only a part of the operation is stopped, only a part of the magnetic disks should be stopped. Can reduce power consumption.

  In addition, the storage array device is an all-flash equipped with a storage array including a plurality of semiconductor element memories such as SSD (Solid State Drive) with low power consumption and high IO (Input / Output) performance. There is a storage array device. In the all-flash storage array device, power consumption can be suppressed by cutting off (stopping operation) the power supply to some semiconductor element memories.

Japanese Patent Laying-Open No. 2015-161996 JP 2007-115232 A

  The following analysis is given by the inventor.

  However, a host terminal that uses such a storage array device may have certain performance requirements for IO (Input / Output) performance. If some storage devices are stopped, the required performance requirements May not be satisfied. In such a case, the operation of the storage device cannot be stopped.

  In addition, there is an upper limit (lifetime) due to the total amount of writing in storage devices, but if the amount of writing in some storage devices that make up the storage array is biased, some storage devices will reach their lifetime earlier. There's a problem. Such a problem of the life of the storage device becomes conspicuous in a storage device using a semiconductor element memory such as SSD. Therefore, there is a method of migrating data as much as possible to a storage device with a low write amount in consideration of the balance of the write amount of the storage device (for example, see Patent Document 2). However, in such a case, the power consumption is merely shifted to another storage device as the data is migrated, so that the power consumption cannot be suppressed.

  A main object of the present invention is to provide a storage array device, a storage system, a storage array control method, and a program that satisfy the performance requirements required by a host terminal and can reduce power consumption while extending the lifetime. That is.

  A storage array device according to a first aspect includes a storage array having a plurality of storage devices, and a controller that controls writing and reading of data to and from the storage array in response to a request from a host terminal The control unit is configured so that at least the input / output flow rate of the data at the time of writing or reading requested from the host terminal satisfies a preset input / output flow rate upper limit value or input / output flow rate lower limit value. Processing for determining the number of operations of the storage device, and whether or not a first storage device having a write amount exceeding a preset threshold occurs when the storage devices of the determined number of operations are operating When the first storage device is generated and the second non-operating second process Start the operation of storage devices, move data in the first storage device to said second storage device, and performs a process of stopping the operation of the first storage device.

  A storage system according to a second aspect includes the storage array device according to the first aspect and a host terminal connected to the storage array device so as to be communicable.

  The storage array control method according to the third aspect is a storage array control method for controlling a storage array having a plurality of storage devices, and at least the input / output flow rate of data at the time of writing or reading requested from the host terminal is A step of determining the number of operation of the storage device so as to satisfy a preset input / output flow rate upper limit value or input / output flow rate lower limit value, and a write amount when the storage device of the determined operation number is operating Determining whether or not a first storage device that has exceeded a preset threshold value has occurred, and when the first storage device has occurred, operation of a non-operating second storage device is started. Move the data of the first storage device to the second storage device, and Comprising a step of stopping the operation of the first storage device, the.

  The program according to the fourth aspect is a program for executing control of a storage array having a plurality of storage devices, and at least the input / output flow rate of data at the time of writing or reading requested from the host terminal is preset. A process for determining the number of operating storage devices so as to satisfy the input / output flow rate upper limit value or the input / output flow rate lower limit value, and a write amount is preset when the storage device of the determined operation number is operating. A process for determining whether or not a first storage device exceeding the threshold value has occurred, and when the first storage device occurs, the operation of the non-operating second storage device is started, and the first Move storage device data to the second storage device and And a process of stopping, thereby executing.

  According to the first to fourth aspects, power consumption can be suppressed while satisfying the performance requirements required by the host terminal and extending the life.

1 is a block diagram schematically showing a configuration of a storage system according to Embodiment 1. FIG. 3 is a block diagram schematically showing a configuration when the storage system according to the first embodiment is virtualized by a logical storage construction unit. FIG. 3 is a table showing a configuration of a storage array management table used in the storage system according to the first embodiment. 4 is a table showing a configuration of an IO flow rate management table used in the storage system according to the first embodiment. 3 is a flowchart schematically showing the operation of a control unit of the storage array device in the storage system according to the first embodiment. 3 is a block diagram schematically showing a configuration of a storage system according to Embodiment 2. FIG. 6 is a flowchart schematically showing the operation of a control unit of a storage array device in a storage system according to a second embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. Note that, in the present application, where reference numerals are attached to the drawings, these are only for the purpose of helping understanding, and are not intended to be limited to the illustrated embodiments. In addition, the following embodiment is an illustration to the last and does not limit this invention. In addition, connection lines between blocks such as drawings referred to in the following description include both bidirectional and unidirectional directions. The unidirectional arrow schematically shows the main signal (data) flow and does not exclude bidirectionality.

[Embodiment 1]
A storage array device according to Embodiment 1 will be described with reference to the drawings. FIG. 1 is a block diagram schematically illustrating a configuration of a storage system according to the first embodiment. FIG. 2 is a block diagram schematically illustrating a configuration when the storage system according to the first embodiment is virtualized by the logical storage construction unit. FIG. 3 is a table showing a configuration of a storage array management table used in the storage system according to the first embodiment. FIG. 4 is a table showing a configuration of the IO flow rate management table used in the storage system according to the first embodiment.

  The storage system 1 is a system for storing data (see FIG. 1). In the storage system 1, a host terminal 10 and a storage array device 20 are connected via a network 30 so that they can communicate with each other. The storage system 1 includes a host terminal 10, a storage array device 20, and a network 30.

  The host terminal 10 is a terminal that issues a data read command or write command to the storage array device 20 (see FIG. 1). As the host terminal 10, for example, a computer device including an information processing resource such as a CPU (Central Processing Unit) and a memory, an information input device, and an information output device can be used. The host terminal 10 transmits a data write request to the storage array device 20 and writes the corresponding data to the storage array device 20. Further, the host terminal 10 transmits a data read request to the storage array device 20 and reads the corresponding data from the disk array device 20. The host terminal 10 is not provided in the form of the storage area of the storage devices 24a to 24d but is provided in the form of the storage area of the logical storage 40 when reading or writing data to or from the storage array device 20.

  The storage array device 20 is a device on which a storage array 24 including a plurality of storage devices 24a to 24d is mounted (see FIG. 1). The storage array device 20 includes a communication unit 21, a control unit 22, a storage unit 23, and a storage array 24.

  The communication unit 21 is a functional unit that transmits and receives data to and from the host terminal 10 via the network 30 (see FIG. 1). The communication unit 21 is controlled by the control unit 22.

  The control unit 22 is a functional unit that controls the communication unit 21, the storage unit 23, and the storage array 24 (see FIG. 1). The control unit 22 executes programs and software to control each functional unit and perform information processing. The control unit 22 controls transmission / reception of information in the communication unit 21 with respect to the network 30. The control unit 22 controls reading and writing of data and files in the storage unit 23 and the storage array 24. The control unit 22 executes a program for controlling the storage array 24, thereby realizing an IO control unit 22a, a logical storage construction unit 22b, a storage array monitoring unit 22c, and a storage array operation control unit 22d.

  The IO control unit 22a is a processing unit that performs writing or reading to the logical storage 40 (see FIG. 2) in response to a request from the host terminal 10 (see FIG. 1). The IO control unit 22 a controls writing or reading so as to satisfy the performance requirements for the logical storage 40 in response to a request from the host terminal 10. The IO control unit 22a controls the IO flow rate of data at the time of writing or reading requested from the host terminal 10 based on the IO flow rate upper limit value or the IO flow rate lower limit value of the IO flow rate management table 23a (see FIG. 4). . That is, when an IO flow rate that exceeds the IO flow rate upper limit value is requested from the host terminal 10, the IO control unit 22 a controls the IO flow rate so that the logical storage 40 is less than or equal to the IO flow rate upper limit value. On the other hand, when an IO flow rate that is lower than the IO flow rate lower limit value is requested from the host terminal 10, the IO control unit 22 a controls the IO flow rate so as to be equal to or higher than the IO flow rate lower limit value for the logical storage 40. The I / O flow rate for the logical storage is suppressed.

  The logical storage construction unit 22b is a processing unit for constructing the logical storage 40 (see FIG. 2) (see FIG. 1). The logical storage construction unit 22b constructs a logical storage 40 in which the storage arrays whose operating states in the storage array management table 23b are in use are integrated. The logical storage construction unit 22b sets the mapping table 23c based on the constructed logical storage 40 and the storage devices 24a to 24d in use.

  The logical storage construction unit 22b calculates the raw performance of the storage array 24 based on the number of storage devices 24a to 24d and the raw performance of the storage devices 24a to 24d when the logical storage 40 is built. In the configuration of FIG. 1, the elementary performance of the storage array 24 is a value obtained by adding the elementary performances of the four storage devices 24a to 24d.

    The logical storage construction unit 22b determines the number of operating storage devices so as to satisfy the performance requirement (IO flow rate upper limit value or IO flow rate lower limit value) set in advance in the constructed logical storage 40. For example, the storage array operation control unit 22d aggregates the IO flow rate lower limit value among the performance requirements, and determines the operation number of the storage devices 24a to 24d that are required at the minimum. Further, the logical storage construction unit 22b determines the number of operating storage devices 24a to 24d so as to satisfy a preset capacity (size) of the logical storage 40. In other words, the logical storage construction unit 22b calculates the number of operations based on the performance requirements, calculates the number of operations based on the capacity, and whichever is greater of the number of operations based on the performance requirements and the number of operations based on the capacity Is determined as the number of operating storage devices. Note that the logical storage construction unit 22b reduces the number of operating storage devices 24a to 24d to be operated when there is not enough free space in the storage array 24. The logical storage construction unit 22b makes a request to the storage array operation control unit 22d so that the determined number of operations is reached.

  The logical storage construction unit 22b periodically refers to the storage array management table 23b (see FIG. 3), and the write amount of each of the operating storage devices 24a to 24d (the write amount of the checked storage device and other unread values). If the difference between the write amount of the active storage device is acceptable) exceeds the threshold value (when the write amount of the storage device is biased), the storage devices 24a to 24d to be operated are changed (switched). The storage array operation control unit 22d is notified as described above. At the time of notification, the logical storage constructing unit 22b targets storage devices whose write amount exceeds a threshold value (all storage devices when there are a plurality of storage devices) and whose operation status is stopped (when there are a plurality of storage devices). Is determined as the operation start target. The logical storage construction unit 22b notifies the storage array operation control unit 22d of the determined operation stop target and operation start target. The logical storage construction unit 22b reconstructs the logical storage 40 when the storage array management table 23b is updated after the notification related to the determination of the operation stop target and the operation start target. The logical storage construction unit 22b resets the mapping table 23c when the logical storage 40 is reconstructed.

  The storage array monitoring unit 22c is a processing unit that periodically monitors the operating state and the write amount of the storage devices 24a to 24d (see FIG. 1). The storage array monitoring unit 22c acquires the operating states and write amounts of the storage devices 24a to 24d through monitoring, and records (updates) them in the storage array management table 23b.

  The storage array monitoring unit 22c updates the storage array management table 23b when the operating state of the storage devices 24a to 24d is changed from stopped to used. The storage array monitoring unit 22c updates the storage array management table 23b when the write amount of the storage device varies. The storage array monitoring unit 22c updates the storage array management table 23b when the operating state of the storage device is changed from use to stop.

  The storage array operation control unit 22d is a processing unit that controls the operation states of the storage devices 24a to 24d in the storage array 24 (see FIG. 1). The storage array operation control unit 22d controls the operation of the storage devices 24a to 24d in response to a request from the logical storage construction unit 22b. The storage array operation control unit 22d activates an operation start target storage device (any of 24a to 24d being stopped) in response to a request for changing the operation target of the storage devices 24a to 24d from the logical storage construction unit 22b. Then, all the data of the operation target storage device (any one of 24a to 24d in operation) is moved to the activated storage device, and the operation target storage device (any one of 24a to 24d) is stopped. .

  The storage unit 23 is a functional unit that stores information. The storage unit 23 is controlled by the control unit 22. The storage unit 23 temporarily stores data received from the host terminal 10. The storage unit 23 stores various programs and various tables used by the control unit 22. The storage unit 23 stores an IO flow rate management table 23a, a storage array management table 23b, and a mapping table 23c.

  The IO flow rate management table 23a is a table in which performance requirements (IO flow rate upper limit value or IO flow rate lower limit value) related to the logical storage 40 are set (see FIG. 4). The IO flow rate management table 23a is set by the logical storage construction unit 22b. The IO flow rate management table 23a is used when the IO control unit 22a controls the IO flow rate of data related to a read command or a write command from the host terminal 10.

  The storage array management table 23b is a table for managing the operating state and the write amount of each storage device 24a to 24d (see FIGS. 1 and 3). The storage array management table 23b is set by the storage array operation control unit 22d.

  The mapping table 23c is a table in which virtual storage areas of the logical storage 40 are associated with actual storage areas of the storage devices 24a to 24d. The mapping table 23c is set by the logical storage construction unit 22b.

  The storage array 24 is an array composed of a plurality of storage devices 24a to 24d. The storage array 24 is controlled by the control unit 22. The storage devices 24a to 24d are devices that store data in a writable or readable manner. As the storage devices 24a to 24d, for example, devices using a semiconductor element memory such as an SSD can be used. In the storage array 24, data to be written to or read from has a RAID 10 (Redundant Array of Inexpensive Disks 10) configuration in the first embodiment, and the mirrored data is stored in any or all of the storage devices 24a to 24d. Striped and distributed.

  The network 30 is an information communication network that connects the host terminal 10 and the storage array device 20 in a communicable manner. As the network 30, for example, an information communication network such as a LAN (Local Area Network), a SAN (Storage Area Network), the Internet, a dedicated line, and a public line can be used.

  The logical storage 40 is a virtual logical storage area (storage area) in which the storage devices 24 a to 24 d in operation in the storage array 24 are integrated. The logical storage 40 is constructed by the logical storage construction unit 22b. The logical storage 40 is used when reading or writing from the host terminal 10. In the logical storage 40, an IO flow rate management table 23a (see FIG. 4) is set as a performance requirement (IO flow rate upper limit value or IO flow rate lower limit value). The actual data storage area of the logical storage 40 can be mirrored and striped on the four storage devices 24a to 24d.

  Next, the operation of the storage array device in the storage system according to the first embodiment will be described with reference to the drawings. FIG. 5 is a flowchart schematically showing the operation of the control unit of the storage array device in the storage system according to the first embodiment. Refer to FIGS. 1 to 4 for each component in the storage system 1.

  First, the storage device monitoring unit 22c periodically monitors the operating state and the write amount of each storage device 24a to 24d (step A1).

  Next, the logical storage construction unit 22b refers to the storage array management table 23b periodically to determine whether there is a storage device whose write amount exceeds a preset threshold value (step A2). . If there is no storage device whose write amount exceeds the threshold (NO in step A2), the process ends.

  Instead of step A2, the difference amount between the write amount of the storage device with the largest active write amount and the write amount of the non-operating storage device is calculated, and the calculated difference amount exceeds the threshold value. It may be determined whether or not. In this case, when the difference amount exceeds the threshold value, the operation of the storage device with the largest amount of active writing is stopped and the operation of the non-operating storage device is started. If the difference amount does not exceed the threshold value, the process ends.

  When there is a storage device whose write amount exceeds the threshold value (YES in step A2), the logical storage constructing unit 22b stops the operation of the storage devices whose write amount exceeds the threshold value (all storage devices when there are multiple). A storage device that is the target and whose operation state is stopped (any or all of the storage devices when there are a plurality of storage devices) is determined as an operation start target (step A3).

  Next, the logical storage construction unit 22b notifies the determined operation stop target and operation start target to the storage array operation control unit 22d, and the storage array operation control unit 22d is based on the notification from the logical storage construction unit 22b. Then, the operation of the operation start target storage device is started (step A4).

  Next, the storage array operation control unit 22d moves all the data of the operation stop target storage device to the operation start target storage device based on the notification from the logical storage construction unit 22b (step A5). The data movement may be performed by copying and deleting the original data.

  Next, the storage array operation control unit 22d stops the operation of the storage device subject to operation stop based on the notification from the logical storage construction unit 22b (step A6).

  Next, the storage array monitoring unit 22c updates the storage array management table 23b (step A7). Here, in the update of the storage array management table 23b, the operation state of the storage device that starts operation in Step A4 is changed from stop to use, and the write of the storage device in which the write amount fluctuates due to the data movement in Step A5 The amount is changed, and the operation state of the storage device whose operation is stopped in step A6 is changed from use to stop. The storage array management table 23b may be updated for each process of steps A4 to A6.

  Finally, the logical storage construction unit 22b reconstructs the logical storage 40 based on the updated storage array management table 23b, and resets the mapping table 23c based on the reconstructed logical storage 40 (Step A8). ) And then finish.

  According to the first embodiment, in the storage array device 20 composed of a plurality of storage devices 24a to 24d, the operation of the storage device that is the operation stop target is stopped based on the required performance requirements, and the operation is performed according to the write amount. By changing the target storage device, the power consumption of the storage array device 20 is solved while solving the problem that the storage devices 24a to 24d constituting the storage array 24 reach the end of their life and the storage array becomes unusable. Can be suppressed. That is, the power consumption of the storage array device 20 can be suppressed while satisfying the performance requirements required by the host terminal 10 and extending the usable period of the storage devices 24a to 24d.

[Embodiment 2]
A storage system according to Embodiment 2 will be described with reference to the drawings. FIG. 6 is a block diagram schematically illustrating the configuration of the storage system according to the second embodiment.

  The storage system 1 is a system for storing data (see FIG. 6). The storage system 1 includes a storage array device 20 and a host terminal 10.

  The storage array device 20 is a device on which a storage array 24 having a plurality of storage devices 24a, 24b, 24c,. The storage array device 20 includes a storage array 24 and a control unit 22. The storage array 24 is an array composed of a plurality of storage devices 24a, 24b, 24c,. The storage array 24 is controlled by the control unit 22. The storage devices 24a, 24b, 24c,..., 24n are devices that store data in a writable or readable manner.

  The control unit 22 writes or reads data to or from the storage array 24 in response to a request from the host terminal 10. The control unit 22 controls the storage array 24. Detailed operation of the control unit 22 will be described later.

The host terminal 10 is a terminal that issues a data read command or write command to the storage array device 20. The host terminal 10 is communicably connected to the storage array device 20.

  Next, the operation of the storage array device in the storage system according to the second embodiment will be described with reference to the drawings. FIG. 7 is a flowchart schematically showing the operation of the control unit of the storage array device in the storage system according to the second embodiment. Refer to FIG. 6 for each component in the storage system 1.

  First, the control unit 22 stores the storage device 24a so that at least the input / output flow rate of data requested from the host terminal 10 satisfies the preset input / output flow rate upper limit value or input / output flow rate lower limit value. , 24b, 24c,..., 24n are determined (step B1).

  Next, when the determined number of operating storage devices (any one of 24a, 24b, 24c,..., 24n) is operating, the control unit 22 sets a threshold with which the write amount is set in advance. It is determined whether or not an excess first storage device has occurred (step B2). If the first storage device has not occurred (NO in step B2), the process ends.

  When the first storage device occurs (YES in step B2), the control unit 22 starts the operation of the non-operating second storage device, moves the data of the first storage device to the second storage device, and Then, the operation of the first storage device is stopped (step B3), and then the operation ends.

  According to the second embodiment, the number of operations of the storage devices 24a, 24b, 24c,..., 24n is determined based on the performance requirement (the input / output flow rate upper limit value or the input / output flow rate lower limit value), and according to the write amount. By changing the storage devices 24a, 24b, 24c,..., 24n to be operated, power consumption can be suppressed while satisfying the performance requirements required by the host terminal 10 and extending the life.

(Appendix)
In the present invention, the storage array device according to the first aspect is possible.

  In the storage array device according to the first aspect, the control unit further performs a process of keeping the determined number of operating storage devices when the first storage device is not generated.

  In the storage array device according to the first aspect, the control unit inputs data at the time of writing or reading requested from the host terminal based on the input / output flow rate upper limit value or the input / output flow rate lower limit value. Further processing for controlling the output flow rate is performed.

  In the storage array apparatus according to the first aspect, in the process of determining the number of operating storage devices, the number of operating storage devices is determined so as to satisfy a preset capacity.

  In the storage array device according to the first aspect, the control unit operates the storage device having the determined operation number and stops the storage device exceeding the determined operation number, and the storage that has been operated A process of setting a mapping table in which a logical storage in which devices are integrated is constructed and a storage area of the constructed logical storage is associated with a storage area of the storage device in operation is further performed.

  In the storage array device according to the first aspect, the control unit further performs a process of rebuilding the logical storage and resetting the mapping table after stopping the operation of the first storage device. .

  In the storage array device according to the first aspect, the control unit periodically monitors the operation state and the write amount of the storage device, and acquires the operation state or write amount of the storage device at the time of monitoring, In the process of further recording the acquired operating state or write amount of the storage device in a storage array management table for managing the storage device, and determining whether or not the first storage device has occurred, Refer to the array management table.

  In the storage array apparatus according to the first aspect, the storage device is a semiconductor element memory.

  In the storage array device according to the first aspect, the storage device is a solid state drive.

  In the present invention, the storage system according to the second aspect is possible.

  In the present invention, the storage array control method according to the third aspect is possible.

  In the present invention, a program according to the fourth aspect is possible.

  It should be noted that the disclosures of the above patent documents are incorporated herein by reference. Within the scope of the entire disclosure (including claims and drawings) of the present invention, the embodiments and examples can be changed and adjusted based on the basic technical concept. Various combinations or selections of various disclosed elements (including each element of each claim, each element of each embodiment or example, each element of each drawing, etc.) within the framework of the entire disclosure of the present invention (necessary) Can be selected). That is, the present invention naturally includes various variations and modifications that could be made by those skilled in the art according to the entire disclosure including the claims and the drawings, and the technical idea. Further, regarding numerical values and numerical ranges described in the present application, it is considered that any intermediate value, lower numerical value, and small range are described even if not specified.

DESCRIPTION OF SYMBOLS 1 Storage system 10 Host terminal 20 Storage array apparatus 21 Communication part 22 Control part 22a IO control part 22b Logical storage construction part 22c Storage array monitoring part 22d Storage array operation control part 23 Storage part 23a IO flow rate management table 23b Storage array management table 23c Mapping table 24 Storage array 24a-24d, 24n Storage device 30 Network 40 Logical storage

Claims (10)

A storage array having a plurality of storage devices;
A control unit that writes or reads data to or from the storage array in response to a request from a host terminal, and controls the storage array;
With
The controller is
Processing for determining the number of operations of the storage device so that at least the input / output flow rate of data requested from the host terminal at the time of writing or reading satisfies a preset input / output flow rate upper limit value or input / output flow rate lower limit value When,
A process of determining whether or not a first storage device having a write amount exceeding a preset threshold value occurs when the determined number of operating storage devices are operating;
When the first storage device occurs, the operation of the non-operating second storage device is started, the data of the first storage device is moved to the second storage device, and the operation of the first storage device is performed Processing to stop
I do,
Storage array device. The controller further performs a process of keeping the determined number of operating storage devices when the first storage device does not occur.
The storage array device according to claim 1. The control unit further performs processing for controlling the input / output flow rate of data at the time of writing or reading requested from the host terminal based on the input / output flow rate upper limit value or the input / output flow rate lower limit value.
The storage array device according to claim 1 or 2. In the process of determining the operation number of the storage device, the operation number of the storage device is determined so as to satisfy a preset capacity.
The storage array device according to any one of claims 1 to 3. The controller is
A process of operating the storage device of the determined operation number and stopping the storage device exceeding the determined operation number;
Constructing a logical storage that integrates the storage devices that have been operated, and setting a mapping table that associates the storage areas of the logical storages that have been configured with the storage areas of the storage devices that are in operation; and
Do further,
The storage array device according to any one of claims 1 to 4. The control unit further performs a process of rebuilding the logical storage and resetting the mapping table after stopping the operation of the first storage device.
The storage array device according to claim 5. The controller is
The operation state and the write amount of the storage device are periodically monitored, and at the time of monitoring, the operation state or the write amount of the storage device is obtained, and the obtained operation state or the write amount of the storage device is obtained from the storage device. Further processing to record in the storage array management table to be managed,
The process of determining whether or not the first storage device has occurred is performed by referring to the storage array management table.
The storage array device according to any one of claims 1 to 6. The storage array device according to any one of claims 1 to 7,
A host terminal communicably connected to the storage array device;
A storage system comprising: A storage array control method for controlling a storage array having a plurality of storage devices,
Determining the number of operations of the storage device so that at least the input / output flow rate of data requested from the host terminal at the time of writing or reading satisfies a preset input / output flow rate upper limit value or input / output flow rate lower limit value; ,
Determining whether or not a first storage device having a write amount exceeding a preset threshold value occurs when the determined number of operating storage devices are operating;
When the first storage device occurs, the operation of the non-operating second storage device is started, the data of the first storage device is moved to the second storage device, and the operation of the first storage device is performed Step to stop and
A storage array control method. A program for executing control of a storage array having a plurality of storage devices,
Processing for determining the number of operations of the storage device so that at least the input / output flow rate of data requested at the time of writing or reading requested from the host terminal satisfies a preset input / output flow rate upper limit value or input / output flow rate lower limit value; ,
A process of determining whether or not a first storage device having a write amount exceeding a preset threshold value occurs when the determined number of operating storage devices are operating;
When the first storage device occurs, the operation of the non-operating second storage device is started, the data of the first storage device is moved to the second storage device, and the operation of the first storage device is performed Processing to stop
A program that executes

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