WO2017085792A1 - Système de mémorisation et procédé de commande de système de mémorisation - Google Patents

Système de mémorisation et procédé de commande de système de mémorisation Download PDF

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Publication number
WO2017085792A1
WO2017085792A1 PCT/JP2015/082311 JP2015082311W WO2017085792A1 WO 2017085792 A1 WO2017085792 A1 WO 2017085792A1 JP 2015082311 W JP2015082311 W JP 2015082311W WO 2017085792 A1 WO2017085792 A1 WO 2017085792A1
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volume
page
storage device
frequency
tier
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PCT/JP2015/082311
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English (en)
Japanese (ja)
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昂士 茂木
雄介 益山
恵亮 福本
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株式会社日立製作所
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Priority to PCT/JP2015/082311 priority Critical patent/WO2017085792A1/fr
Publication of WO2017085792A1 publication Critical patent/WO2017085792A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers

Definitions

  • the present invention relates to a storage system and a storage system control method.
  • Patent Document 1 JP-T-2014-516442
  • the first storage system copies the data of the virtual area of the first virtual volume to the virtual area of the second virtual volume of the second storage system, and the plurality of first virtual volumes In the real area of the first pool allocated to the virtual area of the first virtual volume on the basis of the access information.
  • the first storage system transmits the access information to the second storage system, and the second storage system receives the access information, and based on the access information, the second storage system
  • the data in the real area allocated to the virtual area of the virtual volume is rearranged ”(see summary).
  • Patent Document 1 uses the access of each page of a primary volume that is a virtual volume of a copy source storage system to rearrange each page of a secondary volume that is a copy destination virtual volume. As a result, the technique described in Patent Document 1 brings the page arrangement of the secondary volume closer to the page arrangement of the corresponding primary volume.
  • the other page arrangement method for suppressing a decrease in IO performance when a failure occurs in one of the primary volume and the secondary volume is, for example, the pair type of the volume pair composed of the primary volume and the secondary volume, and the primary volume And the IO status for each secondary volume.
  • Patent Document 1 For example, when a failure occurs in the primary volume, it is assumed that read accesses to the primary volume and the secondary volume that occurred before the failure are concentrated on the secondary volume. However, in the method described in Patent Document 1, since only the access status of the primary volume is considered and read access to the secondary volume is not considered, it is not always possible to suppress a decrease in IO performance when a failure occurs.
  • An object of one aspect of the present invention is to select a placement process for each page of a secondary volume in order to suppress a decrease in IO performance when a failure occurs in the primary volume.
  • a first storage device that assigns a storage area from a plurality of tiers to a primary volume that is a virtual volume; and a storage area that assigns a storage area from a plurality of tiers to a secondary volume that is a virtual volume, and communicates with the first storage device via a network;
  • a storage system including a second storage device and a management system, wherein a plurality of modes defining a rearrangement process of a tier of each page of the secondary volume are defined, and the first storage device Is sent to the second storage device via the network, and the second storage device writes the duplicate data received from the first storage device to the secondary volume, and
  • the system includes the primer With reference to management information of a volume pair consisting of a volume and the secondary volume, a mode is selected from the plurality of modes, and in the rearrangement process in the selected mode, the management system receives the first storage device from the first storage device, The IO frequency of each page of
  • embodiments of the present invention may be implemented by software running on a general-purpose computer, dedicated hardware, or a combination of software and hardware, as will be described later. May be.
  • the management information will be described in a table format.
  • the management information does not necessarily have to be expressed in the data structure of the table, such as a data structure such as a list, DB, and queue, a directory structure, etc. It may be expressed by the method. Therefore, “table”, “list”, “DB”, “queue”, etc. may be simply referred to as “information” to indicate that they do not depend on the data structure.
  • program as a subject (operation subject). Since the program performs processing determined by being executed by the processor while using the memory and the communication port (communication control device), the description may be made with the processor as the subject. Further, the processing disclosed with the program as the subject may be processing performed by a computer such as a management server or an information processing apparatus. Further, part or all of the program may be realized by dedicated hardware.
  • Various programs may be installed in each computer by a program distribution server or a storage medium that can be read by the computer.
  • the program distribution server includes a CPU and storage resources, and the storage resources further store a distribution program and a program to be distributed.
  • the distribution program is executed by the CPU, the CPU of the program distribution server distributes the distribution target program to other computers.
  • FIG. 1 shows a configuration example of a storage system according to the embodiment.
  • the storage system includes, for example, one or more storage devices 110A and one or more host computers 120A belonging to the site 100A, one or more storage devices 110B and one or more host computers 120B belonging to the site 100B, a management client computer 200, and a management server A computer 300 is included.
  • Each component included in the storage system is connected to each other by a network 400 configured by, for example, a LAN (Local Area Network) or a WAN (Wide Area Network).
  • the network 400 may be configured by a SAN (Storage Area Network), Ethernet, or the like.
  • Each component in the site 100A is connected to each other by a network 500 configured by, for example, SAN or Ethernet.
  • the network 500 may be configured by a LAN, a WAN, or the like.
  • Each component in site 100A does not necessarily have to be connected to all the other components in site 100A.
  • site 100A and the site 100B are not particularly distinguished, they are simply expressed as the site 100. The same applies to the notation of each component included in the site 100A and each component included in the site 100B.
  • the host computer 120A designates an access destination and issues a data read request and write request to the storage apparatus 110A.
  • the storage apparatus 110A executes reading and writing of data from the access destination volume in response to a read request and a write request.
  • the host computer 120A may issue a data read request or write request to the storage apparatus 110 included in another site 100.
  • the concept including read and write is also called access.
  • the hardware configuration of the host computer 120A includes, for example, a processor 121A, a memory 122A that stores an application program 123A, an interface 124A, and an interface 125A.
  • the processor 121A operates according to the application program 123A stored in the memory 122A.
  • the interface 124A is an interface device that performs communication with the other host computer 120A and the storage device 110A in the site 100A according to a predetermined protocol.
  • the interface 125A is an interface device that performs communication with devices in other sites 100, the management client computer 200, and the management server computer 300 in accordance with a predetermined protocol.
  • the hardware configuration of the storage apparatus 110A includes one or more parity groups 111A, a controller 113A, and interfaces 114A and 115A.
  • the controller 113A includes a memory 116A, a cache memory 117A, and a processor 118A.
  • a plurality of controllers 113A may be mounted on the storage device 110A.
  • the processor 118A executes a data transfer process between the parity group 111A, another storage device 110, and the cache memory 117A in order to process a read request and a write request from the host computer 120A.
  • the memory 116A stores information necessary for control when the processor 118A processes a read request and a write request and executes a storage function (such as a volume copy function).
  • the memory 116A is a storage area that can be occupied and used by the processor 118A.
  • the memory 116A stores, for example, a program executed by the processor 118A in the processor.
  • Each parity group 111A is a group having a redundant configuration including a plurality of disks 112A, and provides a physical storage area allocated to a volume.
  • the parity group is also called a RAID (Redundant Array of Independent Disk) group.
  • the disk 112A is a storage device, and is, for example, a hard disk drive (HDD) having an interface such as FC (Fibre Channel), SAS (Serial Attached SCSI), SATA (Serial Advanced Technology Attachment).
  • HDD hard disk drive
  • SAS Serial Attached SCSI
  • SATA Serial Advanced Technology Attachment
  • SSD solid state drive
  • the SSD is a flash device on which flash media is mounted.
  • the plurality of types of disks 112A are classified according to performance, and disks 112A having similar performance are included in one tier.
  • the parity group 111A belongs to the hierarchy to which the disks constituting it belong. The relationship between layers is defined by the performance relationship. Normally, the types of disks in each tier are the same, and tiers are configured in order from the drive with the highest performance (such as SSD).
  • the interface 114A is an interface device that executes communication with the host computer 120A and the other storage device 110A in the site 100A according to a predetermined protocol.
  • the interface 115A is an interface device that executes communication with devices in other sites, the management client computer 200, and the management server computer 300 in accordance with a predetermined protocol. Note that the components of the site 100B are the same as the components of the site 100A, and thus description thereof is omitted.
  • the management client computer 200 receives various settings and management commands necessary for operating the storage system from the storage administrator, and transmits them to the management server computer 300.
  • the hardware configuration of the management client computer 200 includes a processor 201, a memory 202, an interface 204, an input device 205, and an output device 206.
  • the processor 201 executes the management client program 203 stored in the memory 202.
  • the interface 204 is an interface device that executes communication with the device within the site 100A, the device within 100B, and the management client computer 200 according to a predetermined protocol.
  • a keyboard and a pointer device are conceivable, and as an example of the output device 206, a display is conceivable, but other devices may be used.
  • a serial interface or an Ethernet interface is used as an input / output device, a display computer having a display, a keyboard, or a pointer device is connected to the interface, and the display information is transferred to the display computer.
  • display on the display computer or accepting input may be substituted for input on the input device 205 and display on the output device 206 .
  • the management server computer 300 operates according to the command received from the management client computer 200.
  • the hardware configuration of the management server computer 300 includes a processor 301, a memory 302, a disk 304, and an interface 306.
  • the processor 301 executes the management server program 310 stored in the memory 302. Details of the management server program 310 will be described later.
  • the disk 304 stores a configuration information table group 320 including information acquired from the storage device 110.
  • the interface 306 is an interface device that executes communication with a device in the site 100A, a device in the site 100B, and the management server computer 300 according to a predetermined protocol.
  • a set of one or more computers that manage the storage system and display the display information of the present invention may be referred to as a management system.
  • the management computer is a management system
  • the combination of the management server computer 300 and the management client computer 200 is also a management system.
  • a plurality of computers may realize processing equivalent to that of the management client computer 200 and the management server computer 300.
  • the plurality of computers display for display
  • the management system includes a display computer).
  • FIG. 2 shows an outline of the logical configuration of the storage apparatus 110.
  • the storage system includes a storage device 110A, a storage device 110B, two host computers 120A, two host computers 120B, a management server computer 300A that manages devices in the site 100A, and a site 100B.
  • a management server computer 300B that manages the apparatus is included.
  • the description of the management client computer 200 is omitted.
  • one management server computer 300 may manage the devices in the site 100A and the devices in the site 100B.
  • the virtual volumes VVOL01 and VVOL02 provided by the processor 118A to the host computer 120A are virtual storage areas recognized by the host computer 120A, and are targets for issuing read requests and write requests from the host computer 120A.
  • the pool 131A is a logical storage area composed of one or more pool volumes of the storage apparatus 110A. For each pool volume, a physical storage area having the same capacity as the pool volume is allocated from one parity group 111A. Pool volumes are classified according to the hierarchy to which the corresponding parity group 111A (disk 112A) belongs. That is, the pool 131A is composed of a plurality of hierarchical logical storage areas.
  • the capacity of the virtual volume is virtualized, and the processor 118A allocates a predetermined unit of logical storage area (referred to as a logical page) from the pool 131A to the virtual volume in response to a write request from the host computer 120A.
  • a virtual storage area to which a logical page is allocated in a virtual volume is also called a virtual page.
  • the processor 118A allocates an unused logical page from the pool 131A.
  • One virtual volume is assigned a storage area only from one pool.
  • the layers T1, T2, and T3 are configured in order from the disk 112A with the highest performance, the layer T1 has a capacity for one page, the layer T2 has a capacity for two pages, and the layer T3 has a capacity for three pages. Shall.
  • I / O processing is executed for the logical storage area of the already allocated pool volume.
  • three pages of logical storage areas are allocated to VVOL01 and VVOL11.
  • the processor 118A processes an I / O request (read or write request) as if the host computer 120A is executing I / O processing on the virtual volumes VVOL01 and VVOL11.
  • I / O request read or write request
  • VVOL01 and VVOL11 virtual volumes
  • VVOL11 and VVOL11 virtual volumes
  • the processor 118A measures the frequency of each read request and write request issued by the host computer 120 to each page of each virtual volume in the storage apparatus 110A, that is, the IO frequency.
  • IOPH Input Output Per Hour
  • IOPS Input Output Per Second
  • Read IOPH and Write IOPH are also examples of IO frequency.
  • the number of IOs in the latest predetermined time is also an example of the IO frequency.
  • the IO frequency is a value per unit data amount or a value that does not depend on the data amount.
  • the processor 118A periodically rearranges hierarchies for each page of the virtual volume belonging to the pool 131A based on the measured IOPH. Specifically, the processor 118A, for example, calculates the sum of Read IOPH and Write IOPH of each page, and assigns the upper layer in order from the page with the larger calculated sum. The data of the virtual page is moved to the newly assigned logical page, that is, is moved to the physical storage area (physical page) assigned to the destination logical page.
  • the processor 118A performs the rearrangement in accordance with an instruction from the management server computer 300A.
  • the processor 118A stores the tier to which each page of the virtual volume belonging to the pool 131A belongs and the IOPH information of each page in the virtual volume information table 132 held in the memory 116A.
  • the processor 118A transmits information in the virtual volume information table 132A stored in the memory 116A to the management server computer 300A.
  • the storage device 110B provides a volume to the host computer 120B.
  • virtual volumes VVOL11 and VVOL12 are provided to the host computer 120B, respectively.
  • the virtual volumes VVOL11 and VVOL12 belong to the pool 131B, and logical pages are allocated from the pool 131B. Note that the disk configuration of each tier and the capacity of each tier may be different between the pool 131A and the pool 131B.
  • VVOL02 and VVOL12 do not form a pair with any virtual volume.
  • VVOL02 and VVOL12 receive host access from host computers 120A and 120B, respectively.
  • the primary volume VVOL01 of the storage device 110A and the secondary volume VVOL11 of the storage device 110B constitute a remote copy pair.
  • the remote copy pair is configured by a volume (virtual volume or logical volume) provided by the storage apparatus 110 at a different site 100.
  • VVOL11 is a backup volume of VVOL01, and the data of VVOL01 is replicated to VVOL11.
  • the remote copy pair is a synchronous copy pair or an asynchronous copy pair.
  • VVOL01 receives host access from the storage apparatus 110A.
  • the storage apparatus 110B does not accept host access to the VVOL 11.
  • the storage apparatus 110B accepts access from the host computer 120B to the VVOL11.
  • the virtual volume information table 132 includes a virtual volume ID column, a page column, and an IO number column.
  • the virtual volume ID column stores the identifier of the virtual volume stored in the storage device 110.
  • the page column stores the page number included in the corresponding virtual volume. The page number is uniquely determined within the same virtual volume.
  • the hierarchy column stores the hierarchy to which the corresponding page belongs.
  • the IO number column includes a Read IOPH column and a Write IOPH column.
  • the Read IOPH column stores the number of reads per hour from the host computer 120 to the corresponding page.
  • the Write IOPH column stores the number of writes per hour from the host computer 120 to the corresponding page.
  • the value of Write IOPH stored in the Write IOPH column indicates the total number of IOPHs from the host computer 120 and Write IOPHs of data copies by other storage devices 110.
  • FIG. 3 is a block diagram illustrating an example of a table included in the configuration information table group 320.
  • the configuration information table group 320 includes a volume table 321, a pool table 322, a hierarchy information table 323, a volume pair table 324, and an IOPH table 325. Details of the hierarchy information table 323, the volume pair table 324, and the IOPH table 325 will be described later.
  • the volume table 321 holds management information for logical volumes and virtual volumes included in each storage device 110. Specifically, for example, the volume table 321 holds the identifier, drive type, and capacity of each logical volume, and the identifier of the storage device to which each logical volume belongs. In addition, the volume table 321 holds an identifier, a belonging pool, and a capacity of each virtual volume, an identifier of a storage device to which each virtual volume belongs, and the like.
  • the pool table 322 holds management information for the pools included in each storage device 110.
  • the pool table 322 holds, for example, identifiers of storage devices to which each pool belongs, identifiers of logical volumes and virtual volumes belonging to each pool, capacity of each pool, and the like.
  • the tier information table 323 indicates the tier to which the virtual volume page included in each storage device 110 belongs.
  • the volume pair table 324 holds volume pair management information.
  • the IOPH table 325 indicates the IOPH by the host computer 120 to the virtual volume page included in each storage device 110. Configuration examples of the hierarchy information table 323, the volume pair table 324, and the IOPH table will be described later.
  • FIG. 4 is a block diagram illustrating an example of a program included in the management server program 330.
  • the management server program 330 includes an inter-pair hierarchy adjustment program 331, an inter-pair hierarchy adjustment program 341 at the time of failback, a pair management program 351, a hierarchy information collection program 352, an IOPH collection program 353, a pair information collection program 354, and a configuration information collection program 355.
  • the inter-pair hierarchy adjustment program 331 includes a transfer mode determination processing program 332, a Mode1 transfer processing program 333, a Mode2 transfer processing program 334, and a Mode3 transfer processing program 335.
  • the Mode 3 transfer processing program 335 executes the IOPH transfer processing for the volume pair whose IOPH transfer mode is “Mode 3”.
  • the IOPH transfer process indicated by each IOPH transfer mode the rearrangement process of the hierarchy of each page of the secondary volume in the volume pair composed of the primary volume and the secondary volume is executed. Further, there may be an IOPH transfer process in which the rearrangement process of each page of the primary volume is further performed. Details of the IOPH transfer mode and the IOPH transfer process will be described later.
  • the failback pair-to-pair hierarchy adjustment program 341 includes a failback program 342, a transfer mode determination processing program 343, a Mode1 transfer processing program 344, a Mode2 transfer processing program 345, and a Mode3 transfer processing program 346.
  • the failback program 342 executes failback processing in accordance with an instruction from the user via the management client computer 200, for example.
  • the transfer mode determination processing program 343 determines the IOPH transfer mode of the volume pair at the time of failback.
  • the Mode1 transfer processing program 344 executes the IOPH transfer processing for the volume pair whose IOPH transfer mode is “Mode1” at the time of failback.
  • the Mode 2 transfer processing program 345 executes the IOPH transfer processing for the volume pair whose IOPH transfer mode is “Mode 2” or “Mode 2 ′” at the time of failback.
  • the Mode 3 transfer processing program 346 executes the IOPH transfer processing for the volume pair whose IOPH transfer mode is “Mode 3” at the time of failback.
  • the pair management program 351 updates the information in the volume pair table 324 according to the information included in the instruction from the user via the management client computer 200, for example.
  • the tier information collection program 352 acquires, from the storage apparatus 110, information on the tier to which each virtual volume page belongs, for example, periodically and when a notification indicating that tier relocation has been executed is received from the storage apparatus 110. To do.
  • the hierarchy information collection program 352 stores the acquired hierarchy information in the hierarchy information table 323.
  • the IOPH collection program 353 acquires the IOPH from the host computer 120 for each page of the virtual volume of the storage device from each storage device 110.
  • the IOPH collection program 353 stores the acquired IOPH in the IOPH table 325.
  • FIG. 5 shows a configuration example of the volume pair table 324.
  • the volume pair table 324 includes, for example, a storage ID column 361, a virtual volume ID column 362, a storage ID column 363, a virtual volume ID column 364, a pair type column 365, a pair status column 366, an IOPH transfer mode column 367, and a pair priority option column. 368, and an IOPH transfer interval column 369.
  • the storage ID column 361 stores the identifier of the storage device 110 that stores the primary volume.
  • the virtual volume ID column 362 stores the identifier of the primary volume.
  • the storage ID column 363 stores the identifier of the storage device 110 that stores the secondary volume.
  • the virtual volume ID column 364 stores the identifier of the secondary volume.
  • both the primary volume and the secondary volume constituting the volume pair are active.
  • the secondary volume also accepts access from the host computer. Update of one volume is synchronously copied to the other volume.
  • the update of the primary volume is asynchronously copied to the secondary volume.
  • the journal (change history) data is transferred to the remote site after being stored on the disk.
  • the response to the host is after the primary volume update process and before the secondary volume update process.
  • the secondary volume update process is executed asynchronously with the primary volume update process. Data is copied to the secondary volume so that the secondary volume update order matches the primary volume update order.
  • the primary volume is active and the secondary volume is standby. That is, only the primary volume accepts access from the host computer, and the secondary volume does not accept host access.
  • the secondary volume update process is executed in synchronization with the update process of the primary volume.
  • the response to the host is after the secondary volume update process.
  • the primary volume is active and the secondary volume is standby. That is, only the primary volume accepts access from the host computer, and the secondary volume does not accept host access.
  • the HA type volume pair is an Active-Active type volume pair composed of two active volumes
  • the AC type volume pair and the SC type volume pair are composed of an active volume and a standby volume, and an Active-Standby. Type volume pair.
  • the above description applies to volume pairs in the PAIR state.
  • the pair status column 366 indicates the status of data copy in the volume pair.
  • Pair states may be defined similarly for virtual volume pairs and logical volume pairs. Examples of pair states are the COPY state, the PAIR state, the SUSPEND state, and the like.
  • the COPY state is a state in which data is copied from the primary volume to the secondary volume in creating a volume pair or resynchronization.
  • the PAIR state is a state in which the volume pair is synchronized and is a normal state. As described above, in the PAIR state, the update of one volume is copied synchronously or asynchronously with the other volume.
  • the SUSPEND state is a state in which the volume pair is divided and is asynchronous, and when any volume is updated, the update is not reflected on the other volume.
  • the IOPH transfer mode column 367 is a value for specifying the contents of the IOPH transfer process executed for the corresponding volume pair, and stores any value of Mode1, Mode2, Mode2 ′, Mode3, ON, and OFF. . Details of the IOPH transfer process in each IOPH transfer mode will be described later.
  • the pair priority option column 368 is a flag for preferentially assigning an upper layer to a virtual page included in the corresponding volume pair, and stores a value of either ON or OFF.
  • the IOPH transfer interval column 369 stores a time interval at which the management server computer 300 acquires an IOPH by the host computer 120 for at least one of the corresponding volume pairs.
  • FIG. 6 shows a configuration example of the hierarchy information table 323.
  • the tier information table 323 includes, for example, a storage ID column 371, a virtual volume ID column 372, a page number column 373, and a tier column 374.
  • the storage ID column 371 stores the identifier of the storage device 110.
  • the virtual volume ID column 372 stores the identifier of the virtual volume stored in the corresponding storage device.
  • the page number column 373 stores the page number included in the corresponding virtual volume.
  • the hierarchy column 374 stores the hierarchy to which the corresponding page belongs.
  • FIG. 7 shows a configuration example of the IOPH table 325.
  • the IOPH table 325 includes, for example, a storage ID column 381, a virtual volume ID column 382, a page number column 383, a Read column 384, and a Write column 385.
  • the storage ID column 381 stores the identifier of the storage device 110.
  • the virtual volume ID column 382 stores the identifier of the virtual volume stored in the corresponding storage device 110.
  • the page number column 383 stores the page number included in the corresponding virtual volume.
  • the Read column 384 stores the number of reads per hour by the host computer 120 for the corresponding page.
  • the Write column 385 stores the number of writes per hour by the host computer 120 for the corresponding page.
  • FIG. 8 shows an example of a tier relocation process for a virtual volume page included in a volume pair.
  • the pair management program 351 receives a remote copy pair creation instruction input from the user to the management client computer 200 from the management client computer 200 (S801).
  • the remote copy pair creation instruction includes the virtual volume ID, pair type, pair status, pair priority option, IOPH transfer mode (ON or OFF), and IOPH transfer interval of the primary volume and secondary volume.
  • the pair management program 351 stores information included in the received instruction in the volume pair table 324.
  • the pair management program 351 determines the IOPH transfer mode of the pair (hereinafter referred to as the first volume pair) composed of the primary volume and the secondary volume indicated by the remote copy pair creation instruction (S802). When the IOPH transfer mode is OFF (S802: OFF), the pair management program 351 sets the IOPH transfer mode column 367 of the volume pair in the volume pair table 324 to “OFF” (S803), and ends the process.
  • the pair management program 351 sets the IOPH transfer mode column 367 of the volume in the volume pair table 324 to “ON” (S804).
  • the pair management program 351 determines the pair priority option of the first volume pair indicated by the remote copy pair creation instruction (S805).
  • the pair priority option is ON (S805: ON)
  • the pair management program 351 sets the pair priority option column 368 of the first volume pair in the volume pair table 324 to “ON” (S807), and proceeds to S808. .
  • the pair management program 351 sets the pair priority option field 368 of the first volume pair in the volume pair table 324 to “OFF” (S806), and proceeds to S808. .
  • the IOPH collection program 353 performs the Read IOPH and Write IOPH for each page of the primary volume and the secondary volume constituting the first volume pair, the storage device 110 that provides the primary volume, and the storage device 110 that provides the secondary volume. Get from.
  • the IOPH collection program 353 stores the acquired IOPH in the IOPH table 325 (S808).
  • the inter-pair hierarchy adjustment program 331 executes IOPH transfer processing (S809). Details of the IOPH transfer processing in step S809 will be described later.
  • the IOPH collection program 353 waits according to the IOPH transfer interval column 369 of the volume pair table 324 (S810), and then executes the process of step S808 again.
  • the failback program 342 receives a failback instruction from the user. Performs the process of step S809. In this case, the process of step S809 is executed with the volume restored from the failure as the primary volume and the other volume as the secondary volume.
  • FIG. 9 shows an example of the IOPH transfer process in step S809.
  • the transfer mode determination processing program 332 executes IOPH transfer mode determination processing (S901). Details of the IOPH transfer mode determination processing in step S901 will be described later.
  • the transfer mode determination processing program 332 sets the specified IOPH transfer mode in the IOPH transfer mode column 367 corresponding to the first volume pair in the volume pair table 324.
  • the IOPH transfer mode may be set in the volume pair table 324 in advance, and step S901 is omitted at this time. Also, the transfer mode determination processing program 332 may execute the IOPH transfer mode determination processing in step S901 only in the first IOPH transfer execution processing in step S809, for example.
  • the Mode1 transfer processing program 333 executes the IOPH transfer processing corresponding to Mode1 (S903), and ends the IOPH transfer processing. Details of the IOPH transfer process corresponding to Mode 1 will be described later.
  • step S901 If the IOPH transfer mode set in step S901 is not “Mode 1” (S902: No), the process proceeds to step S904.
  • the Mode2 transfer processing program 334 executes the IOPH transfer processing corresponding to Mode2 (S905), and ends the IOPH transfer processing. Details of the IOPH transfer processing corresponding to Mode 2 will be described later.
  • step S901 If the IOPH transfer mode set in step S901 is not “Mode 2” (S904: No), the process proceeds to step S906.
  • the Mode2 transfer processing program 334 executes the IOPH transfer processing corresponding to Mode2 ′ (S907), and ends the IOPH transfer processing. To do. Details of the IOPH transfer processing corresponding to Mode 2 'will be described later.
  • the Mode 3 transfer processing program 335 executes an IOPH transfer process corresponding to Mode 3 (S908). End the transfer process. Details of the IOPH transfer process corresponding to Mode 3 will be described later.
  • FIG. 10 shows an example of the IOPH transfer mode determination process in step S901.
  • the transfer mode determination processing program 332 acquires the pair type field 365 of the first volume pair from the volume pair table 324 (S1001). When the acquired pair type column 365 is “AC” or “SC” (S1001: AC, SC), the transfer mode determination processing program 332 sets the IOPH transfer mode column 367 of the first volume pair in the volume pair table 324 to “ Mode 1 ”is set (S1002), and the IOPH transfer mode determination process is terminated.
  • the transfer mode determination processing program 332 refers to the IOPH table 325 and determines the ratio of the IOPH of the primary volume to the IOPH of the entire first volume pair. Calculate (S1002). Specifically, the transfer mode determination processing program 332 calculates (total value of IOPH of primary volume) / ⁇ (total value of IOPH of primary volume) + (total value of IOPH of secondary volume) ⁇ . The ratio is calculated.
  • the transfer mode determination processing program 332 determines whether or not the ratio calculated in step S1002 is less than a predetermined threshold (S1004). When the said ratio is more than a predetermined threshold value (S1004: No), it changes to step S1002. When the ratio is less than the predetermined threshold (S1004: Yes), the transfer mode determination processing program 332 calculates a bias between the IOPH of the primary volume and the IOPH of the secondary volume (S1005).
  • the transfer mode determination processing program 332 reads
  • the bias is calculated by calculating the total value of the IOPHs of the above) ⁇
  • the total value of IOPH in step S1003 and step S1005 may be the total value of Read IOPH and Write IOPH, or may be the total value of only Read IOPH.
  • the transfer mode determination processing program 332 determines whether or not the bias calculated in step S1005 is less than a predetermined threshold (S1006). When the bias is equal to or greater than the predetermined threshold (S1006: No), the transfer mode determination processing program 332 sets the IOPH transfer mode column 367 of the first volume pair in the volume pair table 324 to “Mode3” (S1007), The IOPH transfer mode determination process is terminated.
  • the transfer mode determination processing program 332 indicates that the pair priority option column 368 of the first volume pair in the volume pair table 324 is “ON”. Or “OFF” is determined (S1008).
  • the transfer mode determination processing program 332 sets the IOPH transfer mode column 367 of the first volume pair in the volume pair table 324 to “Mode2” (S1009). ), And finishes the IOPH transfer mode determination process.
  • the transfer mode determination processing program 332 sets the IOPH transfer mode column 367 of the first volume pair in the volume pair table 324 to “Mode 2 ′” ( S1010), the IOPH transfer mode discrimination process is terminated.
  • FIG. 11 shows an outline of IOPH transfer processing in Mode 1.
  • the configuration of the storage system in FIG. 11 is the same as the configuration of the storage system illustrated in FIG. As described in the description of FIG. 2, instead of the management server computers 300A and 300B, one management server computer 300 may manage the devices in the site 100A and the devices in the site 100B.
  • VVOL 11 shows an example in which the pair type of the remote copy pair consisting of VVOL01 and VVOL11 is “AC” or “SC”, that is, a state in which a read request from the host computer 120 does not occur in the VVOL 11 that is the secondary volume.
  • the value on the left side of the arrow in the virtual volume information table 132 indicates a value before execution of the IOPH transfer process, and the value on the right side of the arrow indicates a value after execution of hierarchy relocation by the IOPH transfer process.
  • each page of the VVOL 11 is assigned a hierarchy based only on the write IOPH.
  • each page of VVOL11 is likely to be assigned a lower hierarchy than the corresponding page of VVOL01. In this state, if a failure occurs in VVOL01 and the operation is switched to VVOL11, the IO performance deteriorates. Even if the pair type is “HA”, the same situation occurs when the ratio of IOPH of the primary volume to the total IOPH of the remote copy pair is high. Mode 1 IOPH transfer processing will be described with reference to FIG.
  • FIG. 12 shows an example of Mode 1 IOPH transfer processing (S903) in the configuration of FIG.
  • S903 Mode 1 IOPH transfer processing
  • the IOPH collection program 353A acquires the Read IOPH of each page of the VVOL01 from the storage device 110A (S1201).
  • the IOPH collection program 353A stores the acquired Read IOPH in the IOPH table 325.
  • the Mode1 transfer processing program 333A transmits the acquired Read IOPH to the management server computer 300B (S1202).
  • the Mode1 transfer processing program 333B transmits each received IOPH to the storage apparatus 110B, and instructs the storage apparatus 110B to overwrite the Read IOPH of the VVOL 11 (S1203).
  • the processor 118B changes the value of the Read IOPH column of each page of the VOL11 of the virtual volume information table 132B to the value of the corresponding page of the received Read IOPH.
  • the Mode1 transfer processing program 333B instructs the storage apparatus 110B to execute a tier rearrangement process for the pages of the entire pool to which the VVOL 11 belongs (S1204).
  • the sum of Read IOPH and Write IOPH may be used instead of Read IOPH.
  • the processor 118B executes the page rearrangement process of the entire pool 131B to which the VVOL 11 belongs according to the changed IO information. Specifically, for example, the processor 118B assigns a higher hierarchy in order from the page with the larger sum of the read IOPH and the write IOPH after the change.
  • the processor 118B changes the value in the hierarchy column of the virtual volume information table 132B to the value after rearrangement.
  • the processor 118B changes the value in the hierarchy column of the virtual volume information table 132B to the value of the hierarchy after rearrangement.
  • the P2 hierarchy of the VVOL 11 is changed from T3 to T2 and the P2 hierarchy of the VVOL 12 is changed from T2 to T3 by the page hierarchy rearrangement based on the changed IO information.
  • the IOPH transfer process of Mode 1 By executing the IOPH transfer process of Mode 1, it becomes possible to assign a hierarchy to a page of the secondary volume that suppresses a decrease in IO performance when a failure occurs in the primary volume and the operation is switched to the secondary volume.
  • the ratio of the IOPH of the primary volume to the total IOPH of the remote copy pair is high as in the example of FIG. 11, the IOPH transfer process of Mode 1 is executed, so that a decrease in IO performance can be particularly suppressed.
  • FIG. 13 shows an outline of IOPH transfer processing in Mode 2.
  • one management server computer 300 manages devices in the site 100A and devices in the site 100B.
  • the other configuration of the storage system in FIG. 13 is the same as the configuration of the storage system illustrated in FIG.
  • the storage system may include two management server computers 300 that manage devices in the site 100A and the site 100B.
  • FIG. 13 shows an example in which the pair type of the remote copy pair consisting of VVOL01 and VVOL11 is “HA”, that is, a state in which a read request from the host computer 120A is generated in both VVOL01 and VVOL11.
  • the IOPH values in the pages of VVOL01 and VVOL01 are the same. That is, the example of FIG. 13 shows a situation in which the bias of IOPH between VVOL01 and VVOL11 is small. For example, this situation occurs when the IO load leveling is executed between VVOL01 and VVOL11.
  • FIG. 14 shows an example of Mode 2 IOPH transfer processing (S905) in the configuration of FIG.
  • the IOPH collection program 353 acquires the Read IOPH of each page of VVOL01 from the storage apparatus 110A, and acquires the Read IOPH of each page of VVOL11 from the storage apparatus 110B (S1401).
  • the Mode2 transfer processing program 334 adds the Read IOPH of VVOL01 and the Read IOPH of VVOL11 for each corresponding page of VVOL01 and VVOL11 (S1402).
  • the Mode2 transfer processing program 334 transmits the total value of Read IOPH to the storage apparatus 110A and the storage apparatus 110B, instructs the storage apparatus 110A to overwrite the Read IOPH of VVOL01, and reads the VVOL11 Read to the storage apparatus 110B.
  • An instruction to overwrite the IOPH is issued (S1403).
  • the processor 118A changes the value of the Read IOPH column of each page of VOL01 of the virtual volume information table 132A to the total value of the Read IOPH of the corresponding page.
  • the processor 118B changes the value of the Read IOPH column of each page of the VOL11 of the virtual volume information table 132B to the total value of the Read IOPH of the corresponding page.
  • the Mode2 transfer processing program 334 instructs the storage apparatus 110A to relocate the entire pool page to which the VVOL01 belongs to each tier, and reassigns the entire pool page to which the VVOL11 belongs to each tier to the storage apparatus 110B.
  • the process of arrangement is instructed (S1404).
  • the processor 118A executes the tier rearrangement process for the pages of the entire pool 131A to which the VVOL01 belongs according to the changed IO information stored in the memory 116A. Specifically, for example, the processor 118A assigns higher layers in order from the page with the largest sum of the read IOPH and the write IOPH after the change. The processor 118A changes the value in the hierarchy column of the virtual volume information table 132A to a value indicating the hierarchy after rearrangement.
  • the processor 118B also executes the tier rearrangement process for the pages of the entire pool 131B to which the VVOL 11 belongs, according to the changed IO information stored in the memory 116B, by the same process as the processor 118A.
  • the PVOL hierarchy of VVOL01 is changed from T2 to T1
  • the P2 hierarchy of VVOL01 is changed from T3 to T2
  • the P1 hierarchy of VVOL02 is changed from T1 to T2 by relocation processing according to the overwritten IO information.
  • the level of P2 of VVOL02 is changed from T2 to T3.
  • Mode 2 IOPH transfer processing enables tier allocation to volume pair pages that suppress degradation of IO performance when either primary volume or secondary volume fails and operation switches to the other It becomes. Furthermore, the optimal arrangement of the hierarchy can be performed for the pages of all the volumes included in the pool 131. In the case where the bias of IOPH in the primary volume and the secondary volume is small as in the example of FIG. 13, the IOPH transfer process in Mode 2 is executed, so that a decrease in IO performance can be particularly suppressed.
  • FIG. 15 shows an outline of IOPH transfer processing in Mode 2 '.
  • the configuration of the storage system in FIG. 15 is the same as the configuration of the storage system in FIG. In the example of FIG. 15, the pair type of the remote copy pair is “HA” as in FIG. 13, and the IOPH bias between VVOL01 and VVOL11 is small.
  • the IOPH transfer process in Mode 2 ' will be described with reference to FIG.
  • FIG. 16 shows an example of Mode 2 'IOPH transfer processing (S907) in the configuration of FIG.
  • the IOPH collection program 353 acquires the Read IOPH of each page of VVOL01 from the storage apparatus 110A, and acquires the Read IOPH of each page of VVOL11 from the storage apparatus 110B (S1601).
  • the IOPH collection program 353 specifies the virtual volume belonging to the pool to which the primary volume belongs with reference to the pool table 322, for example.
  • the IOPH collection program 353 calculates the capacity of each tier of the pool to which the primary volume belongs by referring to the tier information table 323 and counting the number of pages of the identified virtual volume for each tier. Similarly, the IOPH collection program 353 calculates the capacity of each tier of the pool to which the secondary volume belongs.
  • the Mode2 transfer processing program 334 adds the Read IOPH of VVOL01 and the Read IOPH of VVOL11 for each corresponding page of VVOL01 and VVOL11 (S1602).
  • the Mode2 transfer processing program 334 stores the number of pages to be added to the Read IOPH in the memory 302 as the number of remaining pages of the primary volume and the secondary volume (S1603). For example, in the example of FIG. 15, since the IOs of 3 pages are added up, the number of remaining pages of the primary volume and the secondary volume in step S1603 is both 3.
  • the Mode2 transfer processing program 334 selects a page to be arranged in the tier T1 from the pages included in the virtual volume constituting the remote copy pair for each of the storage apparatuses 110A and 110B, and instructs the arrangement of the selected page to T1. (S1604).
  • the Mode2 transfer processing program 334 selects, for example, the largest number of VVOL01 pages that do not exceed the capacity of the tier T1 of the pool 131A in the descending order of the combined IOPH, and selects them for the storage apparatus 110A. An instruction to place the page in the hierarchy T1 is given. Similarly, the Mode2 transfer processing program 334 selects, for example, the largest number of VVOL11 pages that do not exceed the capacity of the tier T1 of the pool 131B in descending order of the combined IOPH, and selects the selected pages for the storage apparatus 110B. An instruction to arrange in the hierarchy T1 is given.
  • the Mode2 transfer processing program 334 subtracts the number of pages instructed to be placed in the tier T1 of the pool 131A from the number of remaining pages in the primary volume, and the number of pages instructed to be placed in the tier T1 in the pool 131B from the number of remaining pages in the secondary volume. (S1605).
  • the Mode2 transfer processing program 334 determines whether or not the remaining number of pages of the primary volume and the secondary volume is greater than 0 (S1606). When both the number of remaining pages of the primary volume and the number of remaining pages of the secondary volume are 0 (S1606: No), the IOPH transfer process of Mode 2 'ends. If at least one of the remaining number of pages in the primary volume and the remaining number of pages in the secondary volume is greater than 0 (S1606: Yes), the process proceeds to step S1607.
  • the Mode2 transfer processing program 334 arranges the storage device 110A and the storage device 110B in the tier T2 from the pages that are included in the virtual volume constituting the remote copy pair and to which no tier is assigned in step S1604. A page is selected, and an instruction to place the selected page on T2 is given (S1607).
  • the Mode2 transfer processing program 334 selects the maximum number of VVOL01 pages that do not exceed the capacity of the tier T2 of the pool 131A in descending order of the combined IOPH, and selects the selected pages for the storage apparatus 110A. An instruction to arrange in the hierarchy T2 is given. Similarly, the Mode2 transfer processing program 334 selects the maximum number of VVOL11 pages that do not exceed the capacity of the tier T2 of the pool 131B in descending order of the combined IOPH, and selects the selected pages to the tier T2 for the storage apparatus 110B. Instruct to place.
  • the Mode2 transfer processing program 334 subtracts the number of pages instructed to be arranged in the tier T2 of the pool 131A from the number of remaining pages in the primary volume, and the number of pages instructed to be arranged in the tier T2 of the pool 131B from the number of remaining pages in the secondary volume. Is subtracted (S1608).
  • the Mode2 transfer processing program 334 determines whether or not the remaining number of pages of the primary volume and the secondary volume is greater than 0 (S1609). When both the number of remaining pages of the primary volume and the number of remaining pages of the secondary volume are 0 (S1609: No), the IOPH transfer process of Mode 2 'ends. When at least one of the number of remaining pages of the primary volume and the number of remaining pages of the secondary volume is greater than 0 (S1609: Yes), the process proceeds to step S1610.
  • the Mode2 transfer processing program 334 is a page included in the virtual volume that constitutes the remote copy pair for each of the storage apparatuses 110A and 110B and has not been assigned a tier in steps S1604 and S1606. An instruction to arrange in the hierarchy T3 is given (S1610).
  • the processor 118A assigns a tier to the page of the primary volume according to the instructions in step S1604, step S1607, and step S1610.
  • the processor 118A allocates higher free tiers to virtual volume pages other than the primary volume included in the pool 131A, for example, in descending order of the sum of Read IOPH and Write IOPH of the page.
  • the processor 118A changes the value in the hierarchy column of the virtual volume information table 132A to a value indicating the hierarchy after the rearrangement.
  • the processor 118B also assigns a tier to the virtual volume pages included in the pool 131B by the same processing as the processor 118A.
  • step S1602 instead of the sum of the read IOPH of the primary volume and the secondary volume, as shown in the example of FIG. 15, the read IOPH of the primary volume, the read IOPH of the secondary volume, and the primary volume (or secondary volume).
  • the sum of Write IOPH may be used.
  • the Mode2 transfer processing program 334 may perform the following processing.
  • step S1604 the Mode2 transfer processing program 334 sets a page whose sum value calculated in step S1602 is equal to or larger than a threshold corresponding to the hierarchy T1 as a placement target page in the hierarchy T1.
  • the Mode2 transfer processing program 334 sets the capacity of the hierarchy T1 in descending order of the sum value calculated in step S1602 from the page.
  • the maximum number of pages that do not exceed is selected, and the pages that have not been selected are excluded from the placement target pages in the hierarchy T1.
  • the Mode2 transfer processing program 334 may randomly select the maximum number of pages that do not exceed the capacity of the hierarchy T1, for example.
  • the Mode2 transfer processing program 334 determines a page to which the hierarchy is not allocated and a page whose sum value calculated in step S1602 is equal to or greater than the threshold corresponding to the hierarchy T2 as a placement target page in the hierarchy T2. To do.
  • the Mode2 transfer processing program 334 exceeds the capacity of the hierarchy T2 in ascending order of the sum calculated in step S1602 from the page.
  • a mode 2 transfer processing program 334 randomly selects a maximum number of pages that do not exceed the capacity of the layer T1, for example. You may choose.
  • the IOPH transfer process of Mode 2 ' By executing the IOPH transfer process of Mode 2 ', it becomes possible to assign a hierarchy to a page of the secondary volume, which suppresses a decrease in IO performance when a failure occurs in the primary volume and the operation is switched to the secondary volume. Furthermore, the volume pages that make up the remote copy pair can be preferentially arranged in the upper hierarchy.
  • the IOPH transfer process of Mode 2 ′ is executed, so that a decrease in IO performance can be particularly suppressed.
  • FIG. 17 shows an outline of IOPH transfer processing in Mode 3.
  • the configuration of the storage system in FIG. 17 is the same as the configuration of the computer system illustrated in FIG.
  • the configuration of the storage system in FIG. 17 is the same as the configuration of the storage system in FIG.
  • the pair type of the remote copy pair is “HA”, and there is a large bias of IOPH in VVOL01 and VVOL11 (Read IOPH of each page of VVOL11 is 0).
  • FIG. 18 shows an example of Mode 3 IOPH transfer processing (S908) in the configuration of FIG.
  • the tier information collection program 352 acquires the tier to which each page of VVOL01 belongs from the storage apparatus 110A, and acquires the tier to which each page of VVOL11 belongs from the storage apparatus 110B (S1801).
  • the Mode3 transfer processing program 335 instructs the storage apparatus 110A to place each page of VVOL01 in the tier indicated by the corresponding tier top value, and instructs the storage apparatus 110B to assign each page of VVOL11 to the tier top value. Instructs the processing to be arranged in the hierarchy indicated by (S1803).
  • the processor 118A assigns each page of VVOL01 to the hierarchy indicated by the highest value of the hierarchy. For each page of VVOL02, the processor 118A assigns an unassigned higher hierarchy in order from the page with the largest sum of Read IOPH and Write IOPH. The processor 118A changes the value in the hierarchy column of the virtual volume information table 132A to the value after rearrangement.
  • the processor 118A randomly selects the maximum number of pages that do not exceed the capacity of the tier T1 of the pool 131A from the page. And the top level of the page not selected is treated as 2. Similarly, when the capacity of a page whose hierarchical top value is 2 exceeds the capacity of the tier T2 of the pool 131A, the processor 118A, for example, selects the maximum number of pages that do not exceed the capacity of the tier T2 of the pool 131A from the page. Randomly selected and treated as a top-level value of 1 or 3 for pages not selected.
  • the processor 118B also performs rearrangement of the hierarchy of pages belonging to the VVOL11 and VVOL12 by the same processing as the processor 118A.
  • FIG. 19 shows an example of a pair management screen displayed on the output device 206 of the management client computer 200.
  • the pair management screen 1900 displays information of the volume pair table 324.
  • the pair management screen 1900 includes a pair type display area 1901, a pair status display area 1902, an IOPH transfer mode display area 1903, a transfer interval display area 1904, a primary volume information display area 1905, and a secondary volume information display area 1906.
  • the pair management program 351 displays a pair management screen 1900 on the output device 206 in accordance with an instruction from the user via the input device 205.
  • Each display area of the pair management screen 1900 may accept input of information included in a remote copy pair creation instruction from the user.
  • the storage system can select the placement processing of each page of the secondary volume in the tier in order to suppress a decrease in IO performance when a failure occurs in the primary volume.
  • the storage system selects the arrangement processing based on the pair type from the primary volume and the secondary volume and the IO frequency of the primary volume and the secondary volume, thereby further suppressing the IO performance degradation according to the situation. Processing can be executed.
  • the storage system according to the present embodiment rearranges the page hierarchy of the data migration destination volume when data migration is performed between the virtual volume of the storage apparatus 110A and the virtual volume of the storage apparatus 110B.
  • the pair type column 365 of the volume pair table of the present embodiment includes a MIG (Migration) type.
  • MIG Microgration
  • data migration from the primary volume to the secondary volume is performed.
  • the inter-pair hierarchy adjustment program 331 and the failback pair-to-pair hierarchy adjustment program 341 include a Mode 4 transfer processing program.
  • the remote copy pair creation instruction does not include the pair status, the pair priority option, and the IOPH transfer interval. That is, when the pair type column 365 is the MIG type, the pair status column 366, the pair priority option column 368, and the IOPH transfer interval column 369 are null values.
  • the Mode3 transfer processing program 335 executes the IOPH transfer processing corresponding to Mode3 ( S908), the IOPH transfer process is terminated.
  • the Mode 4 transfer processing program 336 executes the IOPH transfer processing corresponding to Mode 4, and the IOPH End the transfer process.
  • the IOPH transfer mode column 367 of the first volume pair in the volume pair table 324 is set to “Mode 4”, and the IOPH transfer is performed.
  • the mode determination process ends.
  • FIG. 20 shows an outline of IOPH transfer processing in Mode 4.
  • the management server computer 300 manages devices in the site 100A and devices in the site 100B.
  • the storage system may include two management server computers 300 that manage each of the site 100A and the site 100B.
  • the example of FIG. 20 shows an example in which the pair type of the volume pair consisting of VVOL01 and VVOL11 is “MIG”, and data migration processing from VVOL01 to VVOL11 is executed.
  • the tier information collection program 352 Upon receiving the data migration completion notification from the storage apparatus 110B, the tier information collection program 352 acquires the tier to which each page of VVOL01 belongs from the storage apparatus 110A.
  • the Mode4 transfer processing program instructs the storage apparatus 110B to relocate each page of the VVOL11 to the corresponding page hierarchy of the VVOL01.
  • the processor 118B rearranges each page of the VVOL 11 in the corresponding page hierarchy of the VVOL 01.
  • the processor 118B changes the value in the hierarchy column of the virtual volume information table 132B to the value after rearrangement.
  • the processor 118B When the capacity of the page scheduled to be arranged in the tier T1 exceeds the capacity of the tier T1 of the pool 131B, the processor 118B, for example, randomly selects the maximum number of pages from the page that do not exceed the capacity of the tier T1 of the pool 131B. The selected page is changed to a page scheduled to be arranged in the hierarchy T2. Similarly, when the capacity of the page scheduled to be arranged in the tier T2 exceeds the capacity of the tier T2 of the pool 131B, the processor 118B, for example, randomly selects the maximum number of pages from the page that do not exceed the capacity of the tier T2 of the pool 131B. The page not selected is changed to a page scheduled to be arranged in the hierarchy T1 or T3. After the tier rearrangement, the IO from the host computer 120A is switched from VVOL01 to VVOL11.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.

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Abstract

L'invention concerne un système de mémorisation, comprenant : un premier dispositif de mémorisation qui attribue une région de mémorisation qui est formée d'une pluralité de niveaux à un volume primaire ; un second dispositif de mémorisation qui attribue une région de mémorisation qui est formée d'une pluralité de niveaux à un volume secondaire ; et un système de gestion. Plusieurs modes qui stipulent des processus de relocalisation des niveaux de chaque page du volume secondaire sont définis. Des données dupliquées de données que le volume primaire conserve en mémoire sont écrites dans le volume secondaire. Le système de gestion se rapporte à des informations de gestion d'une paire de volumes qui est formée à partir du volume primaire et du volume secondaire et sélectionne un mode. Lors du processus de relocalisation du mode sélectionné, le système de gestion ayant acquis à partir du premier volume de mémorisation soit la fréquence d'E/S de chaque page du volume primaire soit le niveau auquel est associée chaque page du volume primaire, le second dispositif de mémorisation modifie les niveaux attribués à chaque page du volume secondaire, sur la base d'un premier index basé sur la fréquence d'E/S acquise de chaque page du volume primaire ou du niveau auquel est associée chaque page du volume primaire.
PCT/JP2015/082311 2015-11-17 2015-11-17 Système de mémorisation et procédé de commande de système de mémorisation WO2017085792A1 (fr)

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JP2022072408A (ja) * 2020-10-29 2022-05-17 株式会社日立製作所 ストレージシステム及びストレージシステムのファイル再配置方法

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JP2013543996A (ja) * 2011-03-25 2013-12-09 株式会社日立製作所 ストレージシステム及び記憶領域の割当方法
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WO2012169027A1 (fr) * 2011-06-08 2012-12-13 株式会社日立製作所 Système informatique et procédé d'administration de système de stockage
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JP7219746B2 (ja) 2020-10-29 2023-02-08 株式会社日立製作所 ストレージシステム及びストレージシステムのファイル再配置方法

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