JP6908282B2 - Storage management equipment, storage systems, storage management methods and programs - Google Patents

Description

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

Several techniques have been proposed for reducing the power consumption of storage systems.
For example, the storage system described in Patent Document 1 relocates data among a plurality of pools allocated to a virtual storage area. When the free capacity of the pool in which the data whose access frequency is less than the threshold of the treatment is arranged is equal to or more than the predetermined capacity, the storage system reduces the capacity of the pool.
According to this storage system, a larger power consumption reduction effect can be obtained by minimizing the number of HDDs (Hard Disk Drives) that operate according to the operating conditions.

JP-A-2010-231465

If the allocation of data to the data area can be determined based not only on the access frequency but also on other factors, it is expected that the power consumption can be further reduced.

An object of the present invention is to provide a storage management device, a storage system, a storage management method and a program capable of solving the above-mentioned problems.

According to the first aspect of the present invention, the storage management device measures the power consumption of each of a plurality of RAID groups configured by using one or more storage devices at idle, read, and write. A relocation instruction unit that allocates a unit data area obtained by dividing the data area of the storage device into a unit length to a power measuring unit and a unit data area obtained by dividing the data area of the logical disk into unit lengths. Of the idle time, read time, and write time of the unit data area, the unit data area having the longest idle time has the unit data area of the storage device included in the RAID group having the smallest power consumption during idle. Allocate the unit data area of the storage device included in the RAID group that consumes the least amount of power during read to the unit data area with the longest allocation and read time , and consume the unit data area with the longest write time during write. It includes a relocation instruction unit that allocates a unit data area of the storage device included in the RAID group having the smallest power.

According to the second aspect of the present invention, the storage system includes a storage management device and a plurality of storage devices, and the storage management device includes a plurality of RAIDs configured by using one or more of the storage devices. The power measurement unit that measures the power consumption of each of the group during idle, read, and write, the unit data area that divides the data area of the logical disk into unit lengths, and the data area of the storage device as the unit length. A relocation instruction unit that allocates a divided unit data area to the unit data area having the longest idle time among the idle time, read time, and write time of the unit data area of the logical disk. The unit data area of the storage device included in the RAID group having the lowest power consumption is allocated, and the unit data area having the longest read time is the unit of the storage device included in the RAID group having the lowest power consumption at the time of reading. A relocation instruction unit for allocating a data area and allocating a unit data area of the storage device included in the RAID group having the smallest power consumption at the time of writing to the unit data area having the longest write time is provided.

According to the third aspect of the present invention, the storage management method measures the power consumption of each of a plurality of RAID groups configured by using one or more storage devices at idle, read, and write. A step and a step of allocating a unit data area obtained by dividing the data area of the storage device into a unit length to a unit data area obtained by dividing the data area of the logical disk into unit lengths, in which the unit data area of the logical disk is idle. Of the time, read time, and write time, the unit data area with the longest idle time is allocated the unit data area of the storage device included in the RAID group with the lowest power consumption during idle, and the read time is assigned. the longest unit data area, allocates a unit data area of the storage device dissipation of the read is contained in the smallest the RAID group, the longest unit data area is write time, the smallest the consumption electricity of the write It includes a step of allocating a unit data area of the storage device included in the RAID group.

According to a fourth aspect of the present invention, the program measures the power consumption of each of a plurality of RAID groups configured by using one or more storage devices in a computer at idle, read, and write. And a step of allocating a unit data area obtained by dividing the data area of the storage device into a unit length to the unit data area obtained by dividing the data area of the logical disk into unit lengths. Of the idle time, read time, and write time, the unit data area having the longest idle time is assigned the unit data area of the storage device included in the RAID group having the smallest power consumption during idle, and the read time is set. to but longest unit data area, allocates a unit data area of the storage device dissipation of the read is contained in the smallest the RAID group, the longest unit data area is write time, the smallest dissipation amount of the write This is a program for executing a step of allocating a unit data area of the storage device included in the RAID group.

According to the present invention, the allocation of the data area of the storage device to the data area of the logical disk can be determined based on not only the access frequency but also other factors.

It is a schematic block diagram which shows the configuration example of the storage system which concerns on embodiment. It is a figure which shows the example of the data structure of the electric power information stored in the electric power information storage part which concerns on embodiment. It is a figure which shows the example of the data structure of the data area management information stored in the data area management table which concerns on embodiment. It is a figure which shows the flow of the process which the power measurement unit which concerns on embodiment acquires the data about the power consumption of a non-volatile memory and stores it in the power information of a power information storage unit. It is a figure which shows the flow of the process which generates the data area management information when the relocation instruction part which concerns on embodiment generates a logical disk. It is a figure which shows the flow which receives the command by the IO measurement part which concerns on embodiment, and obtains the statistical information of the number of lights shown in the write number column of the data area management information. It is a figure which shows the example of the relationship between the data of the write command which concerns on embodiment, and the data area of a logical disk. It is a figure which shows the flow which asks for the RAID group number column and the RAID area column of the data area management information when the relocation instruction unit which concerns on embodiment relocates. It is a figure which shows another flow which asks for the RAID group number column and the RAID area column of the data area management information when the relocation instruction unit which concerns on embodiment relocates. It is a figure which shows the example of the configuration of the storage management apparatus which concerns on embodiment. It is a figure which shows the example of the configuration of the storage system which concerns on embodiment. It is a schematic block diagram which shows the structure of the computer which concerns on at least one Embodiment.

Hereinafter, embodiments of the present invention will be described, but the following embodiments do not limit the inventions claimed. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.
FIG. 1 is a schematic block diagram showing a configuration example of a storage system according to an embodiment. With the configuration shown in FIG. 1, the storage system 1 includes a storage management device 200, a logical disk 300A, and a logical disk 300B.
The logical disks 300A and 300B are collectively referred to as the logical disk 300.

The logical disk referred to here is a configuration in which storage devices such as HDD (Hard Disk Drive) or SDD (Solid Disk Drive) are logically divided or combined so as to behave as one storage when viewed from the OS. be. In RAID, in particular, a plurality of storage devices are bundled to form one logical disk.
The number of logical disks included in the storage system 1 may be one or more. Further, the number of logical disks included in the storage system 1 may be changed by reconfiguring the logical disks.

The logical disk 300 is composed of a plurality of RAID groups. FIG. 1 shows an example in which the logical disk 300 is composed of four RAID groups 320A, 320B, 320C and 320D, but the number of RAID groups constituting the logical disk 300 is one or more. All you need is.
RAID groups 320A, 320B, 320C and 320D are collectively referred to as RAID group 320.

Each of the RAID groups 320 is composed of one or more non-volatile memories, and each RAID group 320 is composed of different non-volatile memories. FIG. 1 shows an example in which the RAID groups 320A, B, C, and D are configured by using the non-volatile memories 321AA to 321AB, 321BA to 321BC, 321CA to 321CC, and 321DA to 321DC, respectively. Not limited.

Non-volatile memory 321AA to 321AB, 321BA to 321BC, 321CA to 321CC, and 321DA to 321DC are collectively referred to as non-volatile memory 321.
The non-volatile memory 321 corresponds to an example of a storage device. However, the storage device included in the storage system 1 is not limited to the non-volatile memory 321. Various storage devices having individual differences in power consumption can be applied to the storage system 1.

The logical disk 300 is composed of a data area in which the address space of the non-volatile memory 321 is divided into unit lengths, and the data area is uniquely arranged in the RAID group 320. Since the RAID group 320 is composed of the non-volatile memory 321 that is different for each RAID group 320, the data area is uniquely arranged in the RAID group 320. That is, since each non-volatile memory 321 is used exclusively for any one RAID group 320, the address space of the non-volatile memory 321 is also used exclusively for the RAID group 320.

The storage management device 200 communicates with the server device 100 that issues an IO (Input / Output) command. Further, the storage management device 200 manages the logical disk 300 and the individual storage devices used for the logical disk 300.
The storage management device 200 is configured by using a computer such as a microcomputer or a personal computer (PC), for example. Alternatively, the storage management device 200 may be configured by using hardware dedicated to the storage management device 200, such as by using an ASIC (Application Specific Integrated Circuit).

The storage management device 200 includes a measurement period memory 202, a relocation time memory 204, a power information storage unit 230, a data area management table 250, a power supply 201, a power measurement unit 220, an IO measurement unit 240, and the like. It includes an arrangement instruction unit 280, a cache memory 205, and an IO processing unit 260.

The measurement period memory 202 is a storage unit that stores a flag instructing to measure the number of IOs from the server device 100. The number of IOs from the server device 100 here is the number of times the storage management device 200 accesses the logical disk 300 based on the IO command transmitted by the server device 100 to the storage management device 200 (nonvolatile memory constituting the logical disk 300). The number of times to access 321).
The relocation time memory 204 is a storage unit that stores a periodic time (time interval for relocation) for relocating the data area of the logical disk to the RAID group.

For example, the system builder who designs the storage management device 200 sets a reference timing for calculating the relocation time and a time interval for relocating, and stores the relocation time memory 204. When the storage management device 200 (for example, the relocation instruction unit 280) detects the arrival of the reference timing, the storage management device 200 (for example, the relocation instruction unit 280) adds the time interval stored in the relocation time memory 204 to the current time to calculate the relocation execution time. The storage management device 200 (for example, the relocation time memory 204) stores the calculated relocation execution time.

Then, the storage management device 200 (for example, the relocation instruction unit 280) detects the arrival of the relocation execution time by comparing the stored relocation execution time with the current time. When the storage management device 200 (for example, the relocation instruction unit 280) detects the arrival of the relocation execution time, the storage management device 200 (for example, the relocation instruction unit 280) performs a process for executing the relocation. Further, the storage management device 200 (for example, the relocation instruction unit 280) calculates the next relocation execution time by adding the relocation time interval to the relocation execution time, and relocates the time memory 204. Update the relocation execution time stored in.

The electric power information storage unit 230 is a storage unit that stores electric power information. The power information referred to here is information regarding the power consumption of each of the RAID groups 320. As the power consumption of the RAID group 320, the total value or the average value of the power consumption of the non-volatile memory 321 included in the RAID group may be used.
FIG. 2 is a diagram showing an example of a data structure of power information stored in the power information storage unit 230.
In the example of FIG. 2, the power information is composed of tabular (table format) data, and includes a number column 231, a RAID group number column 232, a write power column 233, a read power column 234, and an idle power column 235. , A capacity column 236 and a used capacity column 237.

The number column 231 stores the line number as a serial number starting from 1. The power information storage unit 230 has the same number of rows of power information as the number of RAID groups 320, and stores the information for each RAID group 320. The RAID group 320 and the power information line are associated one-to-one, and the value in the number column 231 in the bottom line is equal to the number of RAID groups 320.
The power information storage unit 230 may store the power information for each logical disk 300, or may store the power information common to the plurality of logical disks 300.

The RAID group number field 232 stores the RAID group number. The RAID group number is an identification number of the RAID group 320 configured on the logical disk 300.
In the power information line, the RAID group 320 identified by the RAID group number stored in the RAID group number column 232 of that line is referred to as the corresponding RAID group 320.

The write power column 233 stores information indicating the power consumption of the corresponding RAID group 320 at the time of writing. Write is the writing of data.
The read power column 234 stores information indicating the power consumption at the time of reading of the corresponding RAID group 320. Read is reading data.
The idle power column 235 stores information indicating the power consumption of the RAID group 320 at idle. Memory idle is a state in which neither read nor write is performed.

The unit for measuring the power consumption during writing, the power consumption during reading, and the power consumption during idling may be each non-volatile memory 321. By configuring each of the RAID groups 320 with one non-volatile memory 321 so that the storage management device 200 can use the non-volatile memory 321 for each of the non-volatile memory 321 in terms of power consumption during writing, power consumption during reading, and idle. The power consumption at that time will be measured.

The storage management device 200 measures the power consumption of each non-volatile memory 321 or each group of non-volatile memories to grasp individual differences, so that the read frequency of the data to be stored in the non-volatile memory 321 is read. The storage destination can be selected according to the characteristics such as the predicted value and the predicted write frequency value. As a result, the storage management device 200 can reduce the power consumption of the non-volatile memory 321.

The storage management device 200 measures each of the above power consumptions for each non-volatile memory 321 and selects the data storage destination in units of the non-volatile memory 321 to more effectively utilize the characteristics of the power consumption of the non-volatile memory 321. Therefore, the power consumption of the non-volatile memory 321 can be further reduced.

On the other hand, the storage management device 200 measures each of the above power consumptions for each RAID group 320 including the plurality of non-volatile memories 321 and selects the data storage destination in units of the RAID group to obtain the data to be allocated. The number of combinations with the RAID group 320, which is the allocation destination, is relatively small. As a result, the process of determining the data allocation destination by the management device 200 can be relatively light. For example, when the storage system 1 includes a large number of non-volatile memories 321 and the non-volatile memories 321 are grouped together in the RAID group 320, a combined explosion of selection between the data to be allocated and the allocation destination Can be avoided.

The capacity column 236 stores information indicating the capacity of the RAID group 320 (the amount of data that can be stored in the RAID group 320).
The used capacity column 237 stores information indicating the capacity to which the LDN (Logical Disk Number) is not assigned among the capacities of the corresponding RAID group 320.

The LDN is a number indicating the logical disk 300 including the data area of the data area in which the address space of the logical disk 300 is divided into unit lengths. The LDN is allocated to the data area in use in the data area of the logical disk 300. The data area to which the LDN is not allocated is an unused data area.
A data area obtained by dividing the address space of the logical disk 300 into unit lengths is referred to as a unit data area.

The data area management table 250 is a storage unit that stores data area management information. The data area management information referred to here is information related to the unit data area.
FIG. 3 is a diagram showing an example of a data structure of data area management information stored in the data area management table 250.
In the example of FIG. 3, the data area management information is composed of tabular (table format) data, and includes a number column 251, a data area column 252, an LDN column 253, a write number column 254, and a read number column 255. , The RAID group number column 256, the RAID area column 257, and the BUSY time column 258.

The number field 251 stores the line numbers as serial numbers starting from 1. The data area management table 250 has data area management information having the same number of rows as the number of unit data areas, and stores information for each unit data area. The unit data area and the row of data area management information are associated one-to-one, and the value of the number column 251 in the bottom row is equal to the number of unit data areas.
The data area management table 250 may store the data area management information for each logical disk 300, or may store the data area management information common to the plurality of logical disks 300.

The data area column 252 stores the data area number. The data area number is an identification number of the unit data area.
In the data area management information line, the unit data area identified by the data area number stored in the data area column 252 of the line is referred to as the corresponding data area.
The LDN column 253 stores the LDN of the corresponding data area. As described above, the LDN of the data area is a number indicating the logical disk 300 including the data area.

The light number column 254 stores the number of lights for the corresponding data area within the measurement period. The number of writes to a data area is the number of times data has been written to that data area.
The read number column 255 stores the number of reads for the corresponding data area within the measurement period. The number of reads for a data area is the number of times data has been read from that data area.

The RAID group number column 256 stores the RAID group number of the RAID group 320 to which the corresponding data area is allocated.
The RAID area column 257 stores a number indicating the address space of the RAID area to which the corresponding data area is allocated.
The RAID area referred to here is a physical storage area. On the other hand, the data area is a storage area when viewed from a user or a CPU (Central Processing Unit). As the address of the RAID area, for example, the identification information of the non-volatile memory 321 and the address in the non-volatile memory 321 can be used. As the address of the data area, for example, the above LDN can be used.
The BUSY time column 258 stores the time during which the storage management device 200 is performing IO (read or write) on the corresponding data area.

The power supply 201 supplies electric power to each part of the storage system 1. In particular, the power supply 201 can supply electric power to each of the non-volatile memory 321 and switch between supplying and stopping the supply of electric power.
Further, the power supply 201 can measure the power consumption of the storage system 1. Specifically, the power supply 201 measures the output power output by the power supply 201 itself. This output power can be regarded as the power consumption of the storage system 1.

The power measurement unit 220 measures the read power, write power, and idle power of the non-volatile memory 321 constituting the RAID group 320 in units of lines of power information stored in the power information storage unit 230, and measures the power information storage unit 230. Write to the power information of.
The measurement performed by the power measuring unit 220 is a measurement using the power supply 201. The power measurement unit 220 calculates the desired power based on the power consumption measured by the power supply 201 in various states.

Specifically, the power measurement unit 220 outputs an instruction to stop the supply of power to the non-volatile memory 321 to be measured and an instruction to start the supply of power to the power supply 201, respectively. Further, the power measurement unit 220 instructs the IO processing unit 260 to read and write the memory to be measured while the power supply 201 is supplying power to the non-volatile memory 321 to be measured. , Output respectively. Then, the power measurement unit 220 acquires information on the power consumption in each state from the power supply 201.

The power measurement unit 220 uses the increase in power consumption in the idle state of the non-volatile memory 321 to be measured as the idle power of the non-volatile memory 321 to be measured, based on the stopped state of power supply to the non-volatile memory 321 to be measured. Write in the idle power column 235 of the corresponding line of the power information. The idle state of the non-volatile memory 321 is a state in which power is supplied to the non-volatile memory 321 but IO processing is not performed.

Further, the power measurement unit 220 reads the non-volatile memory 321 to be measured by measuring the increase in power consumption in the read state of the non-volatile memory 321 to be measured, based on the stopped state of power supply to the non-volatile memory 321 to be measured. As the power, write it in the read power column 234 of the corresponding line of the power information.
Further, the power measurement unit 220 determines the increase in power consumption in the write state of the non-volatile memory 321 to be measured as a reference to the write of the non-volatile memory 321 to be measured, based on the stopped state of power supply to the non-volatile memory 321 to be measured. As the electric power, write it in the write power column 233 of the corresponding line of the electric power information.

The IO measurement unit 240 measures the number of IOs from the server device 100. Specifically, when a write command is generated from the server device 100, the IO measurement unit 240 determines the data area to be written from the LDN, address, and data length indicated in the command. The IO measurement unit 240 searches the data area management information of the data area management table 250, and finds a line in which the LDN in the LDN column 253 and the data area number in the data area column 252 match the LDN and the data area number indicated in the command. select. The IO measurement unit 240 adds the data length (the data length of the write target (the number of unit data areas of the write target) indicated in the command) to the number of writes stored in the write number column 254 of the selected line.
When a read command is generated, the IO measurement unit 240 selects a line of data area management information in the same manner as in the case of a write command, and the data length (command) is set to the number of reads stored in the read number column 255 of the selected line. Add the data length of the read target (the number of unit data areas of the read target) shown in.

The relocation instruction unit 280 relocates the unit data area to the RAID group 320 at the time interval stored in the relocation time memory 204. The relocation instruction unit 280 detects an operation in which the unit data area is frequently accessed among the reads or writes, based on the number of writes, the number of reads, and the BUSY time indicated by the data area management information stored in the data area management table 250. .. Then, the rearrangement instruction unit 280 refers to the power information stored in the power information storage unit 230 and selects the RAID group 320 that consumes less power in the detected operation. The relocation instruction unit 280 allocates (relocates) the selected unit data area to the selected RAID group 320.

The cache memory 205 is an area for copying the data of the unit data area to be relocated from the RAID group 320 according to the relocation instruction of the relocation instruction unit 280.
The IO processing unit 260 executes read or write to the logical disk 300 (nonvolatile memory 321 constituting the logical disk 300) when receiving a read command or a write command from the server device 100 or the IO measurement unit 240. ..

When a read command or a write command is received from the IO measurement unit 240, the IO processing unit 260 manages the data area in addition to executing the read or write to the logical disk 300 (nonvolatile memory 321 constituting the logical disk 300). Update the information. In this case, the IO processing unit 260 searches for the data area management information in the data area management table 250 based on the RAID group number and the RAID area indicated in the command. The IO processing unit 260 adds the time taken for reading or writing to the BUSY time in the BUSY time column 258 of the line selected by the search and stores it.
Further, when the IO processing unit 260 receives a relocation instruction from the relocation instruction unit 280 and receives a read command or a write command from the IO measurement unit 240, the IO processing unit 260 accesses the cache memory 205 from the logical disk 300. To switch.

Next, the operation of the storage system 1 will be described with reference to FIGS. 4 to 7.
In the storage management device 200, the RAID group 320 is configured and set by setting the storage management device 200 before operation. This point will be described by taking the case of RAID group 320B as an example.
When the non-volatile memory 321 used for the configuration of the RAID group 320B is determined to be the non-volatile memories 321BA to 321BC, the capacity of the RAID group 320B is determined. The storage management device 200 sets (writes) the RAID group number, capacity, and used capacity of the RAID group 320B in the power information stored in the power information storage unit 230.

FIG. 4 is a diagram showing a flow of processing in which the power measurement unit 220 acquires data related to the power consumption of the non-volatile memory 321 and stores it in the power information of the power information storage unit 230. The power measurement unit 220 performs the process shown in FIG. 4 when it receives an instruction to start measurement, for example. Regarding the instruction to start the design, for example, an environment builder such as SE (System Engineer) who manages the storage management device 200 is instructed from an interface such as CLI (Command Line Interface) or GUI (Graphical User Interface). May be good. Alternatively, when the characteristics of the power consumption of the non-volatile memory 321 change depending on conditions such as temperature, the storage management device 200 (for example, the CPU of the storage management device 200) periodically instructs the power measurement unit 220 to start measurement. May be done.

In the process of FIG. 4, the power measurement unit 220 sets the value of the variable N1 that counts the number of rows of power information of the power information storage unit 230 to 1 (step S420). As described above, the number of lines of the power information indicates the number of RAID groups 320 for which the power information is acquired. Further, when the value of the variable N1 matches the value of the number 231 of any row of the power information, that row is specified.
Further, the power measurement unit 220 sets the values of the variables A1, B1, C1, D1 and E1 to 0 (step S421).

Then, the power measurement unit 220 reads out the RAID group number column 232 of the line of the power information line in which the value of the variable N2 is specified, and sends the power supply 201 to each of the non-volatile memories 321 constituting the RAID group 320. (Step S422). Among the lines of power information, the RAID group 320 specified by the RAID group number column 232 of the line specified by the value of the variable N2 is referred to as the RAID group 320 to be measured for power.

For example, when the value of the variable N1 is 2 and the RAID group 320 for power measurement is the RAID group 320B, the power measurement unit 220 sends the non-volatile memories 321BA to 321BC constituting the RAID group 320B from the power supply 201. Stop the power supply.
Then, the power measurement unit 220 reads the power consumption from the power supply 201 and stores it in the variable A1 (step S423). As described above, the power measurement unit 220 reads the output power of the power supply 201 as the reading of the power consumption from the power supply 201.

Next, the power measurement unit 220 starts supplying power from the power supply 201 to each of the non-volatile memories 321 constituting the RAID group 320 to be measured (step S424).
For example, when the RAID group 320 to be measured for power is the RAID group 320B, the power measurement unit 220 starts supplying the power from the power supply 201 to the non-volatile memories 321BA to 321BC constituting the RAID group 320B.
Then, the power measurement unit 220 reads the power consumption from the power supply 201 and stores it in the variable B1 (step S425).

Next, the power measurement unit 220 outputs a read command to the IO processing unit 260 to cause the IO processing unit 260 to read the non-volatile memory 321 constituting the RAID group 320 to be measured with power (step S426). ..
For example, when the RAID group 320 for power measurement is the RAID group 320B, the power measurement unit 220 causes the IO processing unit 260 to read the non-volatile memories 321BA to 321BC.
Then, the power measurement unit 220 reads the power consumption from the power supply 201 and stores it in the variable D1 (step S427).

Further, the power measurement unit 220 outputs a write command to the IO processing unit 260 to cause the IO processing unit 260 to write to the non-volatile memory 321 constituting the RAID group 320 to be measured with power (step S428).
For example, when the RAID group 320 for power measurement is the RAID group 320B, the power measurement unit 220 causes the IO processing unit 260 to write to the non-volatile memories 321BA to 321BC.
Then, the power measurement unit 220 reads the power consumption from the power supply 201 and stores it in the variable E1 (step S429).

Next, the power measurement unit 220 writes idle power, read power, and write power in the power information of the power information storage unit 230 (step S430).
Specifically, the power measurement unit 220 stores the value obtained by subtracting the variable A1 from the variable B1 in the idle power column 235 of the corresponding line (the line indicated by the value of the variable N1) of the power information of the power information storage unit 230. .. Further, the power measurement unit 220 stores the value obtained by subtracting the variable A1 from the variable D1 in the read power column 234 of the corresponding line of the power information of the power information storage unit 230. Further, the power measurement unit 220 stores the value obtained by subtracting the variable A1 from the variable E1 in the write power column 233 of the corresponding line of the power information of the power information storage unit 230.

Next, the power measurement unit 220 increases the value of the variable N1 by 1 (step S431). Then, the power measurement unit 220 determines whether the value of the variable N1 is larger than the number of lines of power information in the power information storage unit 230 (step S432). When the power measuring unit 220 determines that the value of the variable N1 is equal to or less than the number of lines of the power information (step S432: NO), the process returns to step S421. As a result, the power measurement unit 220 performs the processes of steps S421 to S432 for the number of lines of power information of the power information storage unit 230. There is a one-to-one correspondence between the power information line and the RAID group 320 that is the target of power measurement, and the number of lines of power information indicates the number of power measurement targets.
On the other hand, when it is determined in step S432 that the value of the variable N1 is larger than the number of lines of the power information (step S432: YES), the power measurement unit 220 ends the process of FIG.

When the logical disk 300 is generated in the RAID group 320, the relocation instruction unit 280 is a data area in which the LDN, which is the number of the logical disk 300, and the address space of the logical disk 300 are divided into unit lengths. The start address is stored in the data area management information of the data area management table 250 as the identification information of the data area constituting the logical disk 300.
FIG. 5 is a diagram showing a flow of processing for generating data area management information in the data area management table 250 when the relocation instruction unit 280 generates a logical disk.

In the process of FIG. 5, the relocation instruction unit 280 determines whether or not the instruction to generate the logical disk has been received (step S520). For example, an environment builder such as SE who manages the storage management device 200 may give an instruction to generate a logical disk from an interface such as CLI or GUI.
If the relocation instruction unit 280 determines that the instruction has not been received, the process returns to step S520. As a result, the relocation instruction unit 280 waits for an instruction to generate a logical disk.
On the other hand, when it is determined that the instruction to generate the logical disk has been received (step S520: YES), the relocation instruction unit 280 stores the value obtained by dividing the capacity of the logical disk 300 by the unit length of the data area in the variable A2 (step S520: YES). Step S521). The value of the variable A2 indicates the number of unit data areas that can be set in the logical disk 300.

Next, the rearrangement instruction unit 280 sets the value of the variable B2 to 0 and the value of C2 to 1 (step S522). The row is specified when the value of the variable C2 matches the value of the number 251 of any row of the data area management information.
Then, the rearrangement instruction unit 280 reads the RAID group number from the RAID group number column 232 of the row in which the value of the idle power column 235 is the minimum value from the power information of the power information storage unit 230 (step S523). .. The RAID group number read by the rearrangement instruction unit 280 indicates the RAID group 320 having the minimum power consumption at idle.

Next, the rearrangement instruction unit 280 stores the start address of the RAID area in the variable B2 (step S524). Then, the rearrangement instruction unit 280 stores the value obtained by adding the unit length of the data area to the value of the variable B2 in the RAID area column 257, and updates the value of the variable B2 to the calculated value (step S525). .. The rearrangement instruction unit 280 determines whether the value of the variable B2 is smaller than the capacity of the RAID group 320 (step S526).

For example, the rearrangement instruction unit 280 identifies a line in which the RAID group number stored in the RAID group number column 232 matches the RAID group number read out in step S523 among the lines of the power information. That is, the rearrangement instruction unit 280 reidentifies the row of the RAID group determined in step S523 to have the minimum power consumption. Then, the rearrangement instruction unit 280 reads the capacity of the RAID group 320 from the capacity column 236 of the specified line and compares it with the value of the variable B2.

When it is determined that the value of the variable B2 is equal to or greater than the capacity of the capacity column 236 (capacity of the RAID group 320) (step S526: NO), the process returns to step S525.
By the processing of steps S524 to S526, the data area of the logical disk is uniquely allocated to the data area of the RAID group. This allocation is indicated by the address of the RAID area stored in the RAID area column 257 for each data area (each line of data area management information) in step S525.

On the other hand, when it is determined in step S526 that the value of the variable B2 is smaller than the value of the capacity column 236 (step S526: YES), the rearrangement instruction unit 280 increases the value of the variable C2 by 1 (step S527).
Then, the rearrangement instruction unit 280 determines whether the value of the variable A2 is smaller than the value of the variable C2 (step S528). When the relocation instruction unit 280 determines that the value of the variable A2 is equal to or greater than the value of the variable C2 (step S528: NO), the process returns to step S523.

When the value of the variable A2 is equal to or greater than the value of the variable C2, that is, when the value of the variable C2 is equal to or less than the value of the variable A2, the number of unit data areas registered in the data area management information by the relocation instruction unit 280 (C2). -1) has not reached the number of unit data areas (A2) that can be set in the logical disk 300. Therefore, the relocation instruction unit 280 continues to perform the processes of steps S523 to S528 to register the unit data area in the data area management information.

On the other hand, when it is determined that the value of the variable A2 is smaller than the value of the variable C2 (step S528: YES), the rearrangement instruction unit 280 ends the process of FIG. That is, when the value of the variable C2 becomes larger than the value of the variable A2, the relocation instruction unit 280 determines that the entire address space of the logical disk 300 has been allocated.

When the relocation instruction unit 280 needs to allocate the address space of the logical disk 300 to the capacity (value of the capacity column 236) of the RAID group 320 indicated by the RAID group number column 232 of the power information of the power information storage unit 230, the relocation instruction unit 280 needs to allocate the address space of the logical disk 300. , The RAID group number of the RAID group 320 having the second smallest idle value is detected from the power information of the power information storage unit 230, and allocation is performed in the same manner as described with reference to FIG.

FIG. 6 is a diagram showing a flow in which the IO measurement unit 240 receives a command and obtains statistical information on the number of writes shown in the number of writes column 254 of the data area management information in the data area management table 250.
In the process of FIG. 6, the variables A3, B3, C3, D3, E3, and F3 are used as follows.
Variable A3: LDN storage area variable B3 in the write command: Storage area variable C3 of the start address in the write command: Storage area variable D3 of the final address obtained by adding the data length to the variable B3: Logical disk 300 in unit data length Storage area variable E3 of the divided address: Area variable F3 that stores the start address of the next unit data area of variable D3: Area variable G3 that stores the value of the write number column 254 of the data area management information of the data area management table 250. : Flag variable N3 indicating that the data length from the start address of the command to the start of the next data area is calculated and processed: Area for storing the value that specifies the line of data area management information

In the process of FIG. 6, the IO measurement unit 240 determines whether the storage management device 200 has received the write command from the server device 100 (step S620). If the IO measurement unit 240 determines that the signal has not been received (step S620: NO), the process returns to step S620. As a result, the IO measurement unit 240 waits for a write command from the server device 100.

On the other hand, when it is determined that the write command from the server device 100 has been received (step S620: YES), the IO measurement unit 240 extracts the LDN, which is a logical disk, the address, and the data length from the write command, and sets the LDN to the variable A3. , The address is stored in the variable B3, the value obtained by adding the data length to the value of B3 is stored in the variable C3, and 0 is stored in the variable G3 (step S621).

Next, the IO measurement unit 240 stores the start address of the data area including the address indicated by the variable B3 in the variable D3 (step S622). For example, assume that the value of the variable B3 is 2500 [address] and the unit length for dividing the logical disk is 2 kilobytes (KB). In this case, the start address of the area including the address 2500 is 2048, and the IO measurement unit 240 stores 2048 [address] in the variable D3.
Then, the IO measurement unit 240 determines whether the address of the LDN and the data area read from the command is equal to the address of the LND and the data area of the line of the data area management information indicated by the variable N3 (step S623).

Specifically, the IO measurement unit 240 starts from the LDN column 253 and the data area column 252 of the line specified by the variable N3 (the line in which the value of the variable N3 and the value of the number column 251 are equal) in the data area management information. , Read the LDN and the address of the data area, respectively. Then, the IO measurement unit 240 determines whether the value of the variable A3 and the LDN read from the data area management information are equal, and the value of the variable D3 and the address read from the data area management information are equal.

When it is determined that the value of the variable A3 and the LDN read from the data area management information are not equal, or the value of the variable D3 and the address read from the data area management information are not equal (step S623: NO), IO measurement Part 240 increases the value of the variable N3 by 1 (step S624).
After step S624, processing returns to step S623.
The IO measurement unit 240 advances the data area management information line until it detects the line indicated by the unit data area to be written by the write command among the data area management information lines by the loop of steps S623 to S624.

On the other hand, when it is determined that the value of the variable A3 and the LDN read from the data area management information are equal, and the value of the variable D3 and the address read from the data area management information are equal (step S623: YES), IO measurement The unit 240 stores the number of writes in the variable F3 (step S625). Specifically, the IO measurement unit 240 reads out the number of writes from the write number column 254 of the line specified by the value of the variable N3 in the data area management information and stores it in the variable F3.

Further, the IO measurement unit 240 stores the value obtained by adding the unit length to the value of the variable D3 in the variable E3 (step S626). Then, the IO measurement unit 240 determines whether the value of the variable E3 is equal to or less than the value of the variable C3 (step S627). When it is determined that the value of the variable E3 is equal to or less than the value of the variable C3 (step S627: YES), the IO measuring unit 240 adds the value of the variable C3 to the value of the variable F3 and subtracts the value of the variable D3. It is stored in the write number column 254 of the data area management information (step S628).

Specifically, the IO measurement unit 240 sets the value of the write number column 254 of the row specified by the variable N3 in the data area information to F3 + (C3-D3). Since the value of F3 is the value stored in the light number column 254, the IO measurement unit 240 increases the value of the light number column by C3-D3. C3-D3 indicates ... Therefore, the IO measurement unit 240 increases the value in the number of writes column by the number of writes (data writing) performed by the write command from the server device 100.
After step S628, the IO measurement unit 240 ends the process of FIG.

On the other hand, when it is determined that the value of the variable E3 is larger than the value of the variable C3 (step S627: NO), the IO measurement unit 240 determines whether the value of the variable G3 is 0 (step S629).
When it is determined that the value of the variable G3 is not 0 (S629: NO), the IO measurement unit 240 adds the unit length of the data area to the value of the variable F3, and writes the line of the data area management information indicated by the variable N3. It is stored in the number column 254 (step S630). Further, the IO measurement unit 240 stores the value of the variable E3 in the variable B3 (step S631).
After step S631, the process returns to step S622.

On the other hand, when it is determined in step S629 that the value of the variable G3 is 0 (S629: YES), the IO measurement unit 240 obtains the start length of the next data area from the start address of the command. After subtracting the variable B3 from E3, the variable F3 is added and stored in the write number column 254 of the line indicated by the variable N3 in the data area management information, and the value of the variable G3 is set to 1 (step S632). Further, the IO measurement unit 240 stores the value of the variable E3 in the variable B3 (step S633).
After step S633, processing returns to step S622.
By this process, the IO measurement unit 240 collects statistics on the number of writes for each unit data area and stores them in the number of writes column 254 of the data area management information of the data area management table 250.

The process of FIG. 6 will be further described with reference to FIG.
FIG. 7 is a diagram showing an example of the relationship between the write command data and the data area of the logical disk. In the example of FIG. 8, the data area of the logical disk is divided into the unit data area which is the data area for each division unit, and the data of the write command is allocated to the unit data area.

Of the parts of the write command data divided according to the allocation to the unit data area, the part including the beginning of the write command is designated as part P11, the part including the end of the write command is designated as part P12, and the other parts are designated as part P12. Let it be P13.
In the part P12, the write command data (part) is allocated to the entire unit data area. Therefore, the IO measurement unit 240 can calculate the number of lights based on the length of the division unit.
On the other hand, in the part P11, the write command data (the part) is assigned only to a part of the unit data area. Therefore, the IO measurement unit 240 needs to calculate the number of writes based on the positional relationship between the beginning or end of the unit data area and the beginning of the data of the write command.
Further, also in the part P13, the data (the part) of the write command is assigned only to a part of the unit data area. Therefore, the IO measurement unit 240 needs to calculate the number of writes based on the positional relationship between the beginning or end of the unit data area and the end of the data of the write command.

Therefore, in the process of FIG. 6, the IO measurement unit 240 conditional branches according to the relationship between the unit data area and the write command data.
In step S628, the IO measurement unit 240 calculates the number of writes to be stored in the unit data area of the portion including the end of the data of the write command. In the case of the example of FIG. 7, the IO measurement unit 240 calculates the number of writes in the storage of the portion P13 in the unit data area.

In step S630, the IO measurement unit 240 calculates the number of writes in storing the intermediate portion of the write command data in the unit data area. In the case of the example of FIG. 7, the IO measurement unit 240 calculates the number of writes in the allocation of the portion P12 to the unit data area.
In step S632, the IO measurement unit 240 calculates the number of writes in the storage of the portion including the beginning of the data of the write command in the unit data area. In the case of the example of FIG. 7, the IO measurement unit 240 calculates the number of writes in the allocation of the portion P11 to the unit data area.

The IO measurement unit 240 also performs the same processing for the read, and stores the read in the read number column 255 of the data area management information of the data area management table 250.
The IO measurement unit 240 divides the write command into unit data area units and outputs the write command to the IO processing unit 260. The IO measurement unit 240 notifies the IO processing unit 260 of the RAID group number and the RAID area (address indicating the unit data area to be written) together with the command.
Similarly, the IO measurement unit 240 divides the read command into unit data area units and outputs the read command to the IO processing unit 260. The IO measurement unit 240 notifies the IO processing unit 260 of the RAID group number and the RAID area (address indicating the unit data area to be written) together with the command.

The IO processing unit 260 stores the difference obtained by subtracting the start time from the end time of IO processing. Then, the IO processing unit 260 searches the RAID group number column 256 and the RAID area column 257 of the data area management information of the data area management table 250 by the RAID group number and the RAID area notified by the IO measurement unit 240 together with the command. do. The IO processing unit adds and stores the difference obtained by subtracting the start time from the end time of IO processing in the BUSY time column 258 of the line where the RAID group number and the RAID area match in the data management area information.

FIG. 8 is a diagram showing a flow for requesting the RAID group number field 256 and the RAID area field 257 of the data area management information when the relocation instruction unit 280 performs relocation.
In the process of FIG. 8, the variable B4 is used as a storage area for the search key of the power information storage unit 230, and the variable C4 is used as an area for counting the number of rows of the data area management information.

In the process of FIG. 8, the relocation instruction unit 280 determines whether the relocation execution time has arrived (step S720). Specifically, the relocation instruction unit 280 compares the relocation arrival time indicated by the time stored in the relocation time memory 204 with the current time, and determines whether or not the relocation execution time has arrived.
When the relocation instruction unit 280 determines that the relocation execution time has not arrived (step S720: NO), the process returns to step S720. As a result, the relocation instruction unit 280 waits for the arrival of the relocation execution time.

On the other hand, when it is determined that the relocation execution time has arrived (step S720: YES), the relocation instruction unit 280 uses the value of the variable C4 to perform processing for each row of the data area management information in the data area management table 250. Is set to 1 (step S721). Then, the relocation instruction unit 280 reads the address of the unit data area from the data area management information and copies the data of the unit data area to the cache memory 205 (step S722).

Specifically, the relocation instruction unit 280 uses the data area management information for the value (unit) of the data area column 252 of the line specified by the variable C4 (the line in which the value of the variable C4 and the value of the number column 251 are equal). The address of the data area) is read. Then, the relocation instruction unit 280 copies the data in the unit data area indicated by the read address to the cache memory 205. The IO processing unit 260 performs IO processing from the server device 100 and the device 100 by using the cache memory 205 thereafter.

Next, the rearrangement instruction unit 280 calculates the idle time, the write time, and the read time of this unit data area (step S723).
Specifically, the relocation instruction unit 280 reads the BUSY time from the BUSY time column 258 of the data area management information of the data area management table 250. Then, the relocation instruction unit 280 calculates a value obtained by subtracting the BUSY time from the relocation execution time as the idle time. Further, the relocation instruction unit 280 calculates the value obtained by dividing the value in the write number column 254 of the data area management information by the number of IOs and multiplying the value by the BUSY time as the write time.
Further, the relocation instruction unit 280 calculates the value obtained by dividing the value in the read number column 255 of the data area management information by the number of IOs and multiplying the value by the BUSY time as the read time.

Then, the rearrangement instruction unit 280 stores the largest values of the idle time, the write time, and the read time in the variable B4 (step S724).
The relocation instruction unit 280 searches the power information column of the power information storage unit 230 with the value of the variable B4 to obtain the RAID group number that is the minimum value (step S725).
The rearrangement instruction unit 280 stores the address of the unallocated RAID area in the RAID group 320 in the RAID group number column 256 and the RAID area column 257 of the data area management information of the data area management table 250 (step S726). As a result, the relocation instruction unit 280 allocates the storage area of the non-volatile memory 321 to the storage area of the logical disk 300 for each division unit length that divides the storage area of the logical disk 300.

Further, the relocation instruction unit 280 copies the data of the cache memory 205 to the data area column 252 when the allocation is completed (step S727).
The relocation instruction unit 280 increases the value of the variable C4 by 1 (step S728), and determines whether the value of the variable C4 is larger than the number of rows of the data area management information (step S729). When the relocation instruction unit 280 determines that the value of the variable C4 is equal to or less than the number of rows of the data area management information (step S729: NO), the process returns to step S722.

As a result, the relocation instruction unit 280 executes the processing of steps S722 to S729 for each line of the data area management information.
On the other hand, when it is determined in step S729 that the value of the variable C4 is larger than the number of rows of the data area management information (step S729: YES), the relocation instruction unit 280 ends the process of FIG.

When the relocation instruction unit 280 performs relocation, the method of obtaining the RAID group number field 256 and the RAID area field 257 of the data area management information is not limited to the method shown in FIG.
FIG. 9 is a diagram showing another flow for requesting the RAID group number column 256 and the RAID area column 257 of the data area management information when the relocation instruction unit 280 performs relocation.

In the process of FIG. 9, the rearrangement instruction unit 280 performs the process of step S724A instead of the process of steps S724 to S725 of FIG. Other than that, the process of FIG. 9 is similar to the process of FIG.
In step S723 of FIG. 9, the relocation instruction unit 280 obtains the idle time / write time / read time from the BUSY time column 258 of the data area management information of the data area management table 250, as in the case of FIG.

Then, in step S724A, the rearrangement instruction unit 280 sets the value obtained by multiplying the idle time and the idle power by the power information line unit of the power information storage unit 230, the value obtained by multiplying the write time and the write power, and The total value obtained by multiplying the read time and the read power is obtained in each row, and the row having the smallest value is selected to obtain the RAID group.
In step S726, as in the case of FIG. 8, the relocation instruction unit 280 uses the RAID group number column 256 and the RAID area column of the data area management table 250 data area management information together with the address of the unallocated RAID area in the RAID group. Store in 257.

It should be noted that the rearrangement instruction unit 280 does not necessarily have to select the longest idle time, write time, and lead time, but may select a relatively long one. For example, the rearrangement instruction unit 280 may select one of the idle time, the write time, and the lead time, which occupies one-third or more of the total time of these three. For example, when the individual difference in power consumption during idling of the non-volatile memory 321 is small and the individual difference in power consumption during writing is large, the relocation instruction unit 280 can positively select the write time. There is a possibility that the power consumption can be further reduced.

Further, the relocation instruction unit 280 does not necessarily have to select the non-volatile memory 321 having the smallest power consumption in order, and may select the non-volatile memory 321 having a relatively small power consumption. For example, the non-volatile memory 321 is divided into a first group in which the power consumption during writing is particularly small, a second group in which the power consumption during writing is relatively small, and a third group in which the power consumption during writing is not small. You may be. Then, the relocation instruction unit 280 allocates only those having a write time longer than a predetermined time to the first group, and second to the data (data area) having a relatively long write time other than that. The non-volatile memory 321 may be selected and allocated from the group.

As described above, the power measurement unit 220 measures the power consumption of each of the plurality of RAID groups 320 configured by using one or more non-volatile memories 321 at idle, read, and write. The relocation instruction unit 280 allocates the unit data area obtained by dividing the data area of the non-volatile memory 321 into the unit length to the unit data area obtained by dividing the data area of the logical disk 300 into unit lengths. The rearrangement instruction unit 280 has a RAID that consumes a relatively small amount of power at idle in a unit data area having a relatively long idle time among the idle time, read time, and write time of the unit data area of the logical disk 300. Allocate a data area of 321 units of non-volatile memory included in the group 320. Further, the relocation instruction unit 280 allocates the unit data area of the non-volatile memory 321 included in the RAID group 320, which consumes a relatively small amount of power at the time of reading, to the unit data area having a relatively long read time. The relocation instruction unit 280 allocates the unit data area of the non-volatile memory 321 included in the RAID group 320, which consumes a relatively small amount of power during writing, to the unit data area having a relatively long write time.
According to the storage management device 200, the allocation of the data area of the non-volatile memory 321 to the data area of the logical disk 300 can be determined based on not only the access frequency but also the power consumption. According to the storage management device 200, it is expected that the power consumption can be further reduced in this respect.

In this way, the storage system 1 has a plurality of logical disks 300. The logical disk 300 is composed of a data area in which the address space is divided into unit lengths, and the data area can be uniquely arranged and allocated to the RAID group 320, and is composed of a plurality of RAID groups 320. The RAID group 320 is composed of a plurality of non-volatile memories 321. Note that when the RAID group 320 is composed of different non-volatile memory 321s, the power consumption is different for each individual non-volatile memory 321 and the read, write, and idle operations are also different. Specifically, the IO tendency from the server device 100 is measured at regular intervals, and in order to reduce the power consumption from the IO tendency, a long-time operation is selected, and the RAID group 320 with low power consumption of the selected operation is selected. The data area of the logical disk 300 is allocated in this order to save power.

Here, as the amount of data increases, the installation of storage devices and the addition of storage devices in data centers and the like are increasing, so that the power consumption of facilities such as data centers is increasing. Power consumption becomes a cost such as electricity charges, and it is desired to reduce the power consumption of the storage device in order to control the cost. Further, regarding storage devices, the replacement of HDDs with SSDs is increasing, and a technique for suppressing the power consumption of SSDs is required. Also, from the viewpoint of environmental issues, it is an element required for products to reduce the impact on the environment by saving power.
According to the storage system 1, the power consumption can be reduced as described above, and in this respect, the cost can be suppressed and the influence on the environment can be reduced.

Further, the rearrangement instruction unit 280 selects the longest of the idle time, the lead time, and the write time. Then, the relocation instruction unit 280 is in a state (idle state, read state, or write state) corresponding to the selected time in the non-volatile memory 321 capable of allocating the data area to the unit data area of the logical disk 300. Allocate the unit data area of the non-volatile memory 321 with the lowest power consumption.

As described above, it is expected that the relocation instruction unit 280 can further reduce the power consumption by using the longest idle time, read time, and write time as a reference. Further, it is expected that the relocation instruction unit 280 can further reduce the power consumption by selecting the non-volatile memory 321 having the smallest power consumption corresponding to the selected time from the selectable non-volatile memory 321.

Further, each of the RAID groups 320 is configured by using a plurality of non-volatile memories 321.
By grouping the plurality of non-volatile memories 321 into one RAID group 320 in this way, the number of combinations of the data to be allocated and the RAID group 320 to be allocated becomes relatively small. As a result, the process of determining the data allocation destination by the management device 200 can be relatively light. For example, when the storage system 1 includes a large number of non-volatile memories 321 and the non-volatile memories 321 are grouped together in the RAID group 320, a combined explosion of selection between the data to be allocated and the allocation destination Can be avoided.

Next, the configuration of the embodiment of the present invention will be described with reference to FIGS. 10 and 11.
FIG. 10 is a diagram showing an example of the configuration of the storage management device according to the embodiment. The storage management device 10 shown in FIG. 10 includes a power measurement unit 11 and a relocation instruction unit 12.
With this configuration, the power measurement unit 11 measures the power consumption of each of the plurality of RAID groups configured by using the plurality of storage devices during idle, read, and write. The relocation instruction unit 12 allocates the unit data area obtained by dividing the data area of the storage device into the unit length to the unit data area obtained by dividing the data area of the logical disk into the unit length. The relocation instruction unit 12 is a RAID group in which the idle time, read time, and write time of the unit data area of the logical disk are relatively long in the unit data area, and the power consumption during idle is relatively small. Allocate the unit data area of the storage device included in, and allocate the unit data area of the storage device included in the RAID group with relatively small power consumption at the time of reading to the unit data area with relatively long read time, and compare the write time. Allocate the unit data area of the storage device included in the RAID group, which consumes relatively little power during writing, to the long unit data area.

According to the storage management device 10, the allocation of the data area of the storage device to the data area of the logical disk can be determined based on not only the access frequency but also the power consumption. According to the storage management device 10, it is expected that the power consumption can be further reduced in this respect.

FIG. 11 is a diagram showing an example of the configuration of the storage system according to the embodiment. The storage system 20 shown in FIG. 11 includes a plurality of storage devices 21 and a storage management device 22. The storage management device 22 includes a power measurement unit 23 and a relocation instruction unit 24.
With this configuration, the power measurement unit 23 measures the power consumption of each of the plurality of RAID groups configured by using the plurality of storage devices 21 at idle, read, and write. The relocation instruction unit 24 allocates the unit data area obtained by dividing the data area of the storage device 21 into the unit length to the unit data area obtained by dividing the data area of the logical disk into unit lengths. The relocation instruction unit 24 is a RAID group in which the idle time, read time, and write time of the unit data area of the logical disk are relatively long in the unit data area, and the power consumption during idle is relatively small. Allocate the unit data area of the storage device 21 included in the above, and allocate the unit data area of the storage device 21 included in the RAID group having a relatively small power consumption at the time of reading to the unit data area having a relatively long read time, and write time. Allocates the unit data area of the storage device 21 included in the RAID group whose power consumption during writing is relatively small to the unit data area having a relatively long write.

According to the storage management device 22, the allocation of the data area of the storage device 21 to the data area of the logical disk can be determined based on not only the access frequency but also the power consumption. According to the storage system 20, it is expected that the power consumption can be further reduced in this respect.

FIG. 12 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
In the configuration shown in FIG. 12, the computer 500 includes a CPU 510, a main storage device 520, an auxiliary storage device 530, and an interface 540.
Any one or more of the above storage management devices 10, 22, and 200 may be mounted on the computer 500. In that case, the operation of each of the above-mentioned processing units is stored in the auxiliary storage device 530 in the form of a program. The CPU 510 reads the program from the auxiliary storage device 530, expands it to the main storage device 520, and executes the above processing according to the program. Further, the CPU 510 secures a storage area corresponding to each of the above-mentioned storage units in the main storage device 520 according to the program. Communication between the storage management device and other devices is executed by having the interface 540 have a communication function and performing communication according to the control of the CPU 510.

When the storage management device 10 is mounted on the computer 500, the operations of the power measurement unit 11 and the relocation instruction unit 12 are stored in the auxiliary storage device 530 in the form of a program. The CPU 510 reads the program from the auxiliary storage device 530, expands it to the main storage device 520, and executes the above processing according to the program. Communication between the storage management device 10 and the storage device is executed by having the interface 540 have a communication function and performing communication according to the control of the CPU 510.

When the storage management device 22 is mounted on the computer 500, the operations of the power measurement unit 23 and the relocation instruction unit 24 are stored in the auxiliary storage device 530 in the form of a program. The CPU 510 reads the program from the auxiliary storage device 530, expands it to the main storage device 520, and executes the above processing according to the program. Communication between the storage management device 22 and the storage device 21 is executed by having the interface 540 have a communication function and performing communication according to the control of the CPU 510.

When the storage management device 200 is mounted on the computer 500, the operations of the power measurement unit 220, the IO measurement unit 240, the relocation instruction unit 280, and the IO processing unit 260 are performed in the auxiliary storage device 530 in the form of a program. It is remembered. The CPU 510 reads the program from the auxiliary storage device 530, expands it to the main storage device 520, and executes the above processing according to the program.

Further, the CPU 510 sets the storage area corresponding to the measurement period memory 202, the relocation time memory 204, the power information storage unit 230, the data area management table 250, and the cache memory 205 to the main storage device 520 according to the program. Secure.
The communication between the storage management device 200 and the server device 100 and the communication between the storage management device 200 and the non-volatile memory 321 are executed by the interface 540 having a communication function and performing communication according to the control of the CPU 510.

A program for executing all or a part of the processes performed by the storage management devices 10, 22, and 200 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in the computer system. The processing of each part may be performed by reading and executing. The term "computer system" as used herein includes hardware such as an OS and peripheral devices.
Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, the above-mentioned program may be a program for realizing a part of the above-mentioned functions, and may be a program for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs and the like within a range that does not deviate from the gist of the present invention.

1, 20 Storage system 10, 22, 200 Storage management device 11, 23, 220 Power measurement unit 12, 24, 280 Relocation instruction unit 21 Storage device 100 Server device 201 Power supply 202 Measurement period memory 204 Relocation time memory 205 Cache memory 230 Power information storage unit 240 IO measurement unit 250 Data area management table 260 IO processing unit 300, 300A, 300B Logical disk 320, 320A, 320B, 320C, 320D RAID group 321, 321AA, 321AB, 321BA, 321BB, 321BC, 321CA, 321CB, 321CC, 321DA, 321DB, 321DC non-volatile memory

Claims (6)

A power measurement unit that measures the power consumption of each of a plurality of RAID groups configured by using one or more storage devices during idle, read, and write.
A relocation instruction unit that allocates a unit data area obtained by dividing the data area of the storage device into a unit length to a unit data area obtained by dividing the data area of the logical disk into unit lengths, and is an idle unit data area of the logical disk. Of the time, read time, and write time, the unit data area with the longest idle time is allocated the unit data area of the storage device included in the RAID group with the lowest power consumption during idle, and the read time is assigned. the longest unit data area, allocates a unit data area of the storage device dissipation of the read is contained in the smallest the RAID group, the longest unit data area is write time, the smallest the consumption electricity of the write A relocation instruction unit that allocates a unit data area of the storage device included in the RAID group, and
Storage management device. The relocation instruction unit is a storage device capable of selecting the longest of the idle time, the read time, and the write time, and allocating a data area to the unit data area of the logical disk. Allocate the unit data area of the storage device that consumes the least power in the state corresponding to the selected time.
The storage management device according to claim 1. Each of the RAID groups is configured with the plurality of storage devices.
The storage management device according to claim 1 or 2. Equipped with a storage management device and multiple storage devices,
The storage management device is
A power measuring unit that measures the power consumption of each of a plurality of RAID groups configured by using one or more of the storage devices during idle, read, and write.
A relocation instruction unit that allocates a unit data area obtained by dividing the data area of the storage device into a unit length to a unit data area obtained by dividing the data area of the logical disk into unit lengths, and is an idle unit data area of the logical disk. Of the time, read time, and write time, the unit data area with the longest idle time is allocated the unit data area of the storage device included in the RAID group with the lowest power consumption during idle, and the read time is assigned. the longest unit data area, allocates a unit data area of the storage device dissipation of the read is contained in the smallest the RAID group, the longest unit data area is write time, the smallest the consumption electricity of the write A relocation instruction unit that allocates a unit data area of the storage device included in the RAID group, and
Storage system with. A process of measuring the power consumption of each of a plurality of RAID groups configured by using one or more storage devices at idle, read, and write, and
In the step of allocating the unit data area obtained by dividing the data area of the storage device into the unit length to the unit data area obtained by dividing the data area of the logical disk into unit lengths, the idle time of the unit data area of the logical disk and the idle time of the unit data area of the logical disk Of the read time and the write time, the unit data area having the longest idle time is assigned the unit data area of the storage device included in the RAID group having the smallest power consumption during idle, and the unit having the longest read time. The unit data area of the storage device included in the RAID group with the lowest read power consumption is allocated to the data area, and the unit data area with the longest write time is assigned to the RAID group with the lowest write power consumption. The step of allocating the unit data area of the storage device included, and
Storage management methods including. On the computer
A process of measuring the power consumption of each of a plurality of RAID groups configured by using one or more storage devices at idle, read, and write, and
In the step of allocating the unit data area obtained by dividing the data area of the storage device into the unit length to the unit data area obtained by dividing the data area of the logical disk into unit lengths, the idle time of the unit data area of the logical disk and the idle time of the unit data area of the logical disk Of the read time and the write time, the unit data area having the longest idle time is assigned the unit data area of the storage device included in the RAID group having the smallest power consumption during idle, and the unit having the longest read time. The unit data area of the storage device included in the RAID group with the lowest read power consumption is allocated to the data area, and the unit data area with the longest write time is assigned to the RAID group with the lowest write power consumption. The step of allocating the unit data area of the storage device included, and
A program to execute.

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