JP2008217575A - Storage device and configuration optimization method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a bottleneck when a load increases in a storage device for providing a partition 110 divided for each operation. <P>SOLUTION: A storage device 100 comprises a cache segment allocation control section 201 for monitoring an access load to each cache segment 103, and adjusting the capacity of unallocated cache memory 102 and the capacity allocated to the cache segment according to the access load; and a cache memory addition monitoring section 204 for detecting an addition of cache memory and notifying of it. The storage device 100 further comprises a logical disk allocation control section 202 and a physical disk addition monitoring section 205, and, when detecting a logical disk of which access load is heavy, performs an operation to equalize the loads by moving the logical disk to a newly generated storage pool. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a storage apparatus and a configuration optimization method thereof, and in particular, a storage apparatus that logically divides a cache memory and a physical disk to form a cache segment and a logical disk, and provides a partition divided for each business. And a configuration optimization method thereof.

  Conventionally, a RAID (Redundant Array Inexpensive Disks) is configured from a set of a plurality of physical disks, and a storage pool that can operate a large-capacity storage area configured from one or more RAID sets as a virtual single device is configured. A storage device that configures a logical disk on a storage pool is known.

  When this type of storage device is connected to multiple business servers and each uses a logical disk, it uses identification information that uniquely defines the connection with the business server (for example, using the worldwide name (WWN) of the connection port) A configuration is known in which only a specific logical disk set is allocated to each business server and used exclusively.

  In addition, the cache memory installed on the storage device is usually shared and used for access to all business servers that use the storage device, but is required if the access load from a specific business server is high. Competing for cache memory can affect other operations. Therefore, a cache memory is logically divided to form a cache segment, and a logical disk corresponding to a business is allocated and used for each cache segment unit.

  For example, in Patent Document 1 and Patent Document 2, by controlling the amount of cache memory to be allocated by setting an allocation reference value and priority for each other host or application, the influence of access from the other host or application is controlled. It has been proposed to minimize.

  Also, in Patent Document 3 and Patent Document 4, the access load of the logical disk configured in the storage apparatus is monitored based on the same concept, and a logical disk with a high load is automatically transferred to another storage pool (logical volume). It has been proposed to move and level the load to eliminate disk access bottlenecks.

JP 2004-139349 A JP 2006-227688 A JP 2005-209055 A JP 2006-309318 A

  In recent years, some storage devices scale up by dynamically adding physical disks and cache memory modules without interruption as needed. When a memory is added, there is a problem that automatic allocation (redistribution) cannot be performed. In Patent Documents 1 and 2 that execute management / adjustment in a cache segment, it is not assumed that a cache memory is newly added.

  On the other hand, in the above-described prior art, if the access frequency to the logical disk of a certain partition is low for a long time, the utilization rate of the cache memory is lowered and the allocated cache memory cannot be used effectively. In Patent Documents 1 and 2, there is no description until the cache memory allocation itself is automatically canceled to free resources and prepare for future business expansion.

  The above situation also applies to a logical disk in the same manner. In order to cope with an increase in the number of accesses, there is a problem that even when a physical disk is added, the logical disk cannot be automatically moved. Also in Patent Document 3 and Patent Document 4, it is assumed that there is a spare disk or a data eviction destination for load leveling, and automatic load leveling when a disk is added is mentioned. It has not been.

  The present invention has been made in view of the above circumstances, and the object of the present invention can be suitably applied to a storage apparatus having a function of scaling up without stopping, and at the time of occurrence of a bottleneck, It is an object of the present invention to provide a storage apparatus capable of appropriately responding and a configuration optimization method for the storage apparatus.

  According to a first aspect of the present invention, a storage device that logically divides a cache memory to form a cache segment and provides the cache segment together with the partitioned partition, monitoring an access load on each cache segment, A cache segment allocation control unit that adjusts an unallocated cache memory capacity and an allocation capacity for the cache segment according to the access load, and detects an increase in cache memory, and notifies the cache segment allocation control unit A storage device including a cache memory expansion monitoring unit, and a configuration optimization method by each processing unit of the storage device are provided.

  According to a second aspect of the present invention, there is provided a storage apparatus that logically divides a physical disk to configure a logical disk and provides the logical disk together with the divided partitions, and monitors an access load on the logical disk and accesses the logical disk. When a logical disk with a high load is detected, a storage pool having a necessary capacity is secured, and a logical disk allocation control unit that moves storage data of the logical disk is detected, and an additional physical disk is detected, and the logical disk There is provided a storage device characterized by comprising a physical disk addition monitoring unit for notifying a disk allocation control unit, and a configuration optimization method by each of the processing units of the storage device.

  According to the present invention, it is possible to optimize the performance of a storage apparatus that supports access from multiple types of hosts and applications. The reason for this is that it is configured to automatically detect the addition of resources and to perform individual handling such as addition / assignment or the like according to the access load status.

Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of a business system including a storage apparatus according to the first embodiment of the present invention.

  Referring to FIG. 1, the storage apparatus 100 shows a business system in which one or more business computers 120 that can hold dedicated data and can be used for different businesses and one or more management computers 121 are connected. ing.

  The storage apparatus 100 includes one or more physical disks and a cache memory module 101 (hereinafter also referred to as “cache memory”) that temporarily stores data associated with I / O.

  The partition 110 is management information that logically divides storage device resources and defines a set of virtual storage resources. Each partition 110 can be assigned one or more logical disks 106 and one or more cache segments 103 corresponding to the business. In this embodiment, the partition management table 303 manages the relationship between partitions and cache segments (see FIG. 2).

  The cache segment 103 is one or more virtual cache memory areas obtained by logically dividing the cache memory 101 mounted on the storage device. Each cache segment 103 is managed by the cache segment management table 304, and is configured so that a specific logical disk is associated and only the logical disk can exclusively use the cache memory area on the cache segment (see FIG. 3). ). It is assumed that a logical disk is associated with a cache segment so as to belong to any one partition and is not registered redundantly in a plurality of partitions.

  An unallocated cache memory area of the cache memory (module) 101 mounted on the storage device is managed as an empty cache segment 102 in the cache segment management table 304.

  The storage pool 105 is a virtual storage area composed of the one or more physical disks, and free physical disks can be added in arbitrary units. The specific configuration is managed in the storage pool management table 305 (see FIG. 4). Note that it is desirable to set in advance the types of RAID that make up the storage pool.

  The logical disk 106 is a logical device configured from a virtual storage area on the storage pool 105. The specific configuration is managed in the logical disk management table 306 (see FIG. 5).

  In the above configuration, for example, when a physical cache memory module is added, the unallocated capacity of the cache segment management table 304 is added, and the free cache segment is expanded.

  Similarly, for example, when a free physical disk is added to the storage pool 105, the configuration physical disk of the storage pool management table 305 is added, and the available free capacity of the storage pool is expanded, but the used capacity remains unchanged. The logical disk is not affected.

  The cache segment allocation control unit 201 refers to the cache memory performance log 301 to monitor the load on the cache segment 103 allocated to the partition corresponding to the business, and determines that the load is high if the load is high for a certain period of time, A free cache segment 102 is allocated to the cache segment to expand the capacity.

  When there are few free cache segments 102 grasped in the cache segment management table 304 and sufficient capacity cannot be allocated, the cache segment allocation control unit 201 stores the cache segment in an allocation waiting state and stores it in the management computer 121. A message to that effect is output and the storage administrator is requested to increase the cache memory.

  The logical disk allocation control unit 202 refers to the logical disk performance log 302 to monitor the I / O load on the logical disk corresponding to the business, and when the entire storage pool constituting the logical disk is high for a certain period of time. It is determined that the load is high, and the storage data of the logical disk is moved from the current storage pool to another storage pool with a low load via the logical disk migration unit 203.

  When the free capacity of all the storage pools grasped in the storage pool management table 305 and the logical disk management table 306 is small and cannot be moved, the logical disk allocation control unit 202 waits for allocation of the storage pool to which the logical disk belongs. And a message to that effect are output to the management computer 121 to request the storage administrator to add a physical disk.

  The logical disk migration unit 203 copies the storage data of the specified logical disk to the specified storage pool area according to the instruction of the logical disk allocation control unit 202, and switches the correspondence relationship between the storage pool and the logical disk to change the logical relationship. Move the disk.

  The cache memory expansion monitoring unit 204 monitors the free cache segment 102, and when the cache memory is expanded, calls the cache segment allocation control unit 201 to prompt reassignment.

  The physical disk addition monitoring unit 205 monitors a free physical disk, and if a physical disk is added, calls the logical disk allocation control unit 202 to re-execute storage pool creation and logical disk migration.

  FIG. 2 is a diagram showing an example of the partition management table 303. Referring to FIG. 2, the partition management table 303 includes a pair of partition identification information for identifying a partition 110 configured in the storage apparatus 100 and cache segment identification information for identifying a cache segment. In the example of FIG. 2, the cache segment SEG # 1 is associated with the first partition PT1, and the cache segment SEG # 2 is associated with the second partition PT2.

  FIG. 3 is a diagram showing an example of the cache segment management table 304. Referring to FIG. 3, the cache segment management table 304 includes cache segment identification information, an allocated capacity of a cache memory capacity allocated to each cache segment, and one or more logics that exclusively use the cache segment. It is composed of a pair of logical disk identification information indicating a set of disks and an allocation waiting state indicating whether additional cache memory capacity is required for the cache segment.

  FIG. 4 is a diagram illustrating an example of the storage pool management table 305. Referring to FIG. 4, the storage pool management table 305 includes storage pool identification information for identifying a storage pool, a configuration physical disk that indicates a set of one or more physical disks that constitute each storage pool, and the total capacity of the storage pool. A used capacity indicating the total capacity used as a logical disk in the storage pool, an unallocated free capacity as a logical disk, and an allocation waiting state indicating whether additional capacity expansion is required for the storage pool. Composed.

  FIG. 5 is a diagram showing an example of the logical disk management table 306. Referring to FIG. 5, the logical disk management table 306 is composed of a pair of logical disk identification information for identifying a logical disk, the capacity of each logical disk, the storage pool identification information to which each logical disk belongs, and its allocation area. Is done.

  FIG. 6 is a diagram showing an example of the free physical disk management table 307. Referring to FIG. 6, the free physical disk management table 307 includes a pair of an allocation state indicating whether each physical disk has been allocated to the storage pool or not allocated, and physical disk identification information.

  FIG. 7 is a diagram showing an example of the cache memory performance log 301. Referring to FIG. 7, the cache memory performance log 301 includes cache segment identification information, time information indicating a section of load information in the cache segment, and a value serving as a performance index (in the example of FIG. (Average value).

  FIG. 8 is a diagram showing an example of the logical disk performance log 302. Referring to FIG. 8, the logical disk performance log 302 includes logical disk identification information, time information indicating a section of load information in the logical disk, and a value serving as a performance index (in the example of FIG. 8, an I / O density section). Of the average value).

  Next, the operation of the storage apparatus according to this embodiment will be described in detail with reference to the drawings. FIG. 9 is a flowchart showing a series of processes executed in the cache segment allocation control unit 201.

  Here, it is assumed that the cache segment allocation control unit 201 operates by being called from the control unit of the storage apparatus 100, the cache memory expansion monitoring unit 204, etc. by specifying cache segment identification information for each cache segment unit. .

  Referring to FIG. 9, first, the cache segment allocation control unit 201 refers to the cache memory performance log 301 and analyzes load information on the cache memory for the presence of a performance bottleneck on the cache memory in the cache segment 103. (Step S11).

  For example, the performance index value (the number of DIRTYs illustrated in FIG. 7 and the number of times of waiting for disk writing, etc. illustrated in FIG. 7) exceeds a predetermined reference value UL during a certain period from the present time. When the specified standard number of times is exceeded, it can be determined that the load is high. In addition, when the performance index value indicating the load is always below the predetermined reference value LL during a certain period in the past, and the number of times the number is further below the specified reference number, the load is low. Judgment can be made.

  As a result of the analysis, when it is determined that the load on the cache segment 103 is high (Y in step S12), the cache segment allocation control unit 201 adds the cache memory capacity to the cache segment 103. It is determined that it is necessary, and the cache segment management table 304 is referred to, and it is confirmed whether or not there is a free cache memory necessary for addition (step S13).

  Further, when the cache segment 103 is in the allocation waiting state = “present” in the cache segment management table 304, it is determined that there is a high load, and the processing of step S13 and subsequent steps is performed.

  The cache segment allocation control unit 201 determines that there is free cache memory if there is free capacity in an unallocated cache segment (Y in step S13), and adds capacity from the free cache memory to the cache segment (step S13). S14).

  Finally, the cache segment allocation control unit 201 updates the cache segment management table 304 (step S15).

  On the other hand, if there is not enough free cache memory to perform addition in step S13, the cache segment allocation control unit 201 indicates that an additional cache memory module is required to increase the free cache memory. The storage administrator is notified (step S16), and the allocation waiting state on the cache segment management table 304 is updated to “present” (step S15). FIG. 10 illustrates a state immediately after the allocation waiting state of the cache segment SEG # 2 on the cache segment management table 304 is updated to “present”. As a notification form to the storage administrator, for example, a system message display or an e-mail by a storage management program operating on the management computer 121 can be appropriately adopted.

  If it is determined in step S12 that the load on the cache segment is not high (N in step S12) and is low (Y in step S17), the cache segment allocation control unit 201 It is determined that an extra cache memory is allocated to the segment 103, and referring to the cache segment management table 304, the allocated amount of the cache segment 103 is reduced and the unallocated cache capacity is increased (step S18). The segment management table 304 is updated (step S15).

  When the load on the cache segment 103 is within a certain range that is neither high load nor low load, the allocation amount of the cache segment 103 is not increased or decreased (N in step S12, N in step S17).

  FIG. 11 is a flowchart showing a series of processing executed in the logical disk allocation control unit 202.

  Here, it is assumed that the logical disk allocation control unit 202 operates by being called from the control unit of the storage apparatus 100, the physical disk addition monitoring unit 205, or the like by specifying logical disk identification information for each logical disk. .

  Referring to FIG. 11, first, the logical disk allocation control unit 202 refers to the logical disk performance log 302, and the storage pool 105 to which the logical disk 106 belongs becomes a performance bottleneck due to I / O access to the logical disk 106. The load information for the logical disk 106 is analyzed (step S21).

  For example, the performance index value indicating the load (the density of the I / O frequency for the logical disk exemplified in FIG. 8 and the busy rate for the storage pool, etc.) has exceeded a predetermined reference value UL between the present time and the past certain period. Furthermore, when the number of times exceeds the specified reference number, it can be determined that the load is high.

  As a result of the analysis, if it is determined that the load on the logical disk 106 is high (Y in step S22), the logical disk allocation control unit 202 needs to move the location of the logical disk 106. And the migration candidate logical disk and the migration destination storage pool are extracted (step S23). The migration destination storage pool is selected from the storage pools associated with the partition to which the logical disk belongs.

  Next, the logical disk allocation control unit 202 checks whether or not there is more free capacity in the extracted migration destination storage pool than the migration candidate logical disk capacity (step S24).

  Here, if there is not enough free capacity in the migration destination storage pool (N in Step S24), the logical disk allocation control unit 202 determines that migration is not possible, and then refers to the free physical disk management table 307, It is checked whether there are enough free physical disks to create a new storage pool (step S25).

  If there are sufficient free physical disks (Y in step S25), the logical disk allocation control unit 202 selects a plurality of free physical disks and creates a new storage pool (step S26).

  Next, the logical disk allocation control unit 202 registers and updates the newly created storage pool in the storage pool management table 305 (step S27).

  Finally, the logical disk migration unit 203 is called by designating the migration target logical disk and the migration destination storage pool, and logical disk migration processing is performed (step S28).

  In step S25, if there is no free physical disk 104 that can create a new storage pool as the migration destination storage pool 105 of the logical disk 106, the logical disk allocation control unit 202 needs to add a physical disk. This is notified to the storage administrator via the management computer 121 (step S29), and the allocation waiting state on the storage pool management table 305 is updated to “present” (step S30).

  When the load on the logical disk 106 is not high, the logical disk 106 is not moved (N in step S22).

  FIG. 12 is a flowchart showing the processing executed by the logical disk migration unit 203 called in step S28 of FIG. First, the logical disk migration unit 203 secures the same migration destination area as the migration target logical disk in the designated migration destination storage pool, and creates a working temporary logical disk (step S31).

  Next, the logical disk migration unit 203 copies the data stored in the migration target logical disk over the entire area to the temporary logical disk, and waits for the complete data copy of the entire area to be completed (step S32). ).

  After the data copy is completed for all areas, the logical disk migration unit 203 exchanges the correspondence relationship between the migration target logical disk and the storage pool (step S33).

  Finally, the logical disk migration unit 203 updates the logical disk management table 306 (step S34).

  FIG. 13 is a flowchart showing processing executed in the cache memory expansion monitoring unit 204 that operates when called periodically. First, the cache memory addition monitoring unit 204 checks whether or not a cache memory is newly added (step S41).

  If the cache memory has been expanded and the number of unallocated free cache segments has increased, the cache memory expansion monitoring unit 204 updates the cache segment management table 304 (step S42).

  Next, the cache memory expansion monitoring unit 204 refers to the cache segment management table 304 and confirms whether or not there is a cache segment 103 waiting to be allocated (step S43).

  Here, for example, when there is a cache segment 103 in the allocation waiting state as in the cache segment SEG # 2 in FIG. 10, the cache memory expansion monitoring unit 204 cancels the allocation waiting state and performs cache segment allocation control. The unit 201 is called (step S44). Thereafter, the cache segment allocation control unit 201 adds the capacity of the cache segment by the processing shown in FIG.

  FIG. 14 is a flowchart showing processing executed in the physical disk addition monitoring unit 205 that operates when called periodically. First, the physical disk addition monitoring unit 205 checks whether a new physical disk has been added (step S51).

  If a physical disk has been added and a free physical disk 104 exists, the physical disk addition monitoring unit 205 updates the free physical disk management table 307 (step S52).

  Next, the physical disk addition monitoring unit 205 refers to the storage pool management table 305 and confirms whether there is a storage pool 105 waiting for allocation (step S53).

  Here, for example, when there is a storage pool 105 in the allocation waiting state as in the storage pool POOL # 3 in FIG. 4, the physical disk addition monitoring unit 205 cancels the allocation waiting state and performs logical disk allocation control. The unit 202 is called (step S54). Thereafter, the logical disk is moved by the logical disk allocation control unit 202 by the processing shown in FIG.

  As described above, in the storage device according to the present embodiment, even when the cache memory capacity divided and allocated in units of cache segments becomes a bottleneck, it prompts the expansion of the cache memory, detects the expansion, and promptly It has become possible to increase the performance of storage devices.

  Further, when the load of the cache memory allocated to the cache segment is reduced, it is possible to reduce the allocated cache memory capacity and improve the cache memory usage efficiency of the entire system.

  Similarly, for logical disks, even if the logical disk and storage pool become heavily loaded and become a bottleneck, it prompts the addition of physical disks, detects the addition, and quickly balances the load. Therefore, it is possible to increase the performance of the storage apparatus.

  The preferred embodiments of the present invention have been described above. However, it does not depart from the gist of the present invention to automatically detect the addition of a cache memory or physical disk and reallocate / optimize resources according to the load. Various modifications can be made within the range. For example, in the above-described embodiment, an example of application to a business system has been described, but it goes without saying that the present invention can be applied to any information system that requires sharing of a storage apparatus.

It is a block diagram showing the structure of the business system containing the storage apparatus which concerns on the 1st Embodiment of this invention. It is the figure which showed an example of the partition management table hold | maintained at the storage apparatus which concerns on the 1st Embodiment of this invention. It is the figure which showed an example of the cache segment management table hold | maintained at the storage apparatus which concerns on the 1st Embodiment of this invention. FIG. 3 is a diagram showing an example of a storage pool management table held in the storage apparatus according to the first embodiment of the invention. 3 is a diagram showing an example of a logical disk management table held in the storage apparatus according to the first embodiment of the invention. FIG. It is a figure which showed an example of the free physical disk management table hold | maintained at the storage apparatus which concerns on the 1st Embodiment of this invention. It is the figure which showed an example of the cache memory performance log hold | maintained at the storage apparatus which concerns on the 1st Embodiment of this invention. It is the figure which showed an example of the logical disk performance log hold | maintained at the storage apparatus which concerns on the 1st Embodiment of this invention. 4 is a flowchart showing processing executed at predetermined time intervals in the cache segment allocation control unit of the storage apparatus according to the first embodiment of the invention. It is the figure which showed an example of the cache segment management table of the state updated to the allocation waiting state = existence. 4 is a flowchart showing processing executed at predetermined time intervals in the logical disk allocation control unit of the storage apparatus according to the first embodiment of the invention. It is a flowchart showing the process performed in the logical disk moving part of the storage apparatus which concerns on the 1st Embodiment of this invention. 3 is a flowchart showing processing executed at predetermined time intervals in the cache memory expansion monitoring unit of the storage apparatus according to the first embodiment of the invention. 4 is a flowchart showing processing executed at predetermined time intervals in the physical disk addition monitoring unit of the storage apparatus according to the first embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Storage device 101 Cache memory module 102 Free cache segment 103 Cache segment 104 Free physical disk 105 Storage pool 106 Logical disk 120 Business computer 121 Management computer 110 Partition 201 Cache segment allocation control unit 202 Logical disk allocation control unit 203 Logical disk migration unit 204 Cache memory expansion monitoring unit 205 Physical disk expansion monitoring unit 301 Cache memory performance log 302 Logical disk performance log 303 Partition management table 304 Cache segment management table 305 Storage pool management table 306 Logical disk management table 307 Free physical disk management table

Claims (12)

A storage device that logically divides cache memory to form a cache segment and provides it with the divided partitions,
A cache segment allocation control unit that monitors an access load for each cache segment and adjusts an unallocated cache memory capacity and an allocated capacity for the cache segment according to the access load;
A cache memory expansion monitoring unit that detects an increase in cache memory and notifies the cache segment allocation control unit;
A storage device. The cache segment allocation control unit outputs a cache memory expansion request message when a shortage of unallocated cache memory occurs.
The storage apparatus according to claim 1. The cache segment allocation control unit stores, as an allocation waiting state, a cache segment in which the allocation capacity of the cache memory could not be added due to a shortage of unallocated cache memory, and when the unallocated cache memory is generated, Performing additional cache memory allocations for cache segments,
The storage apparatus according to claim 1, wherein the storage apparatus is a storage device. Further, the access load on the logical disk is monitored, and when a logical disk with a high access load is detected, a storage pool having a necessary capacity is secured and the storage data of the logical disk is moved. And
A physical disk addition monitoring unit that detects the addition of a physical disk and notifies the logical disk allocation control unit;
The storage apparatus according to any one of claims 1 to 3. The logical disk allocation control unit outputs a physical disk expansion request message when there is a shortage of free physical disks,
The storage apparatus according to claim 4. The logical disk allocation control unit stores a storage pool that stores a logical disk that could not be moved to the other storage pool due to a shortage of free physical disks as an allocation waiting state. After receiving the physical disk expansion notification, create a storage pool and move the storage area of the logical disk.
The storage apparatus according to claim 4 or 5, wherein: A storage device that logically divides a physical disk to configure a logical disk and provides it with a partitioned partition,
A logical disk allocation control unit that monitors an access load on the logical disk and, when a logical disk with a high access load is detected, secures a storage pool having a necessary capacity and moves storage data of the logical disk; ,
A physical disk addition monitoring unit that detects the addition of a physical disk and notifies the logical disk allocation control unit;
A storage device. The logical disk allocation control unit outputs a physical disk expansion request message when there is a shortage of free physical disks,
The storage apparatus according to claim 7. The logical disk allocation control unit stores a storage pool that stores a logical disk that could not be moved to the other storage pool due to a shortage of free physical disks as an allocation waiting state. After receiving the physical disk expansion notification, create a storage pool and move the storage area of the logical disk.
The storage apparatus according to claim 7 or 8, wherein:   A business system comprising the storage device according to any one of claims 1 to 9, and two or more computers to which a cache segment and a logical disk are allocated, respectively. A configuration optimization method in a storage apparatus that logically divides cache memory to form a cache segment and provides the cache segment together with the divided partitions,
The storage device is
Monitor the access load for each cache segment and the expansion status of the cache memory,
Adjusting the unallocated cache memory capacity and the allocated capacity for the cache segment according to the access load;
A method for optimizing the configuration of a storage apparatus. A storage device configuration optimizing method by logical disk configuration management in a storage device that logically divides a physical disk to configure a logical disk and provides it with the partitioned partitions,
The storage device is
Monitor the access load to the logical disk and the physical disk expansion status,
When a logical disk with a high access load is detected, a storage pool having a necessary capacity is secured and the storage data of the logical disk is moved;
A method for optimizing the configuration of a storage apparatus.

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