CN111090394A - Volume-level RAID-based magnetic array management method and device - Google Patents
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- 238000007726 management method Methods 0.000 title claims abstract description 33
- 238000005192 partition Methods 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000012217 deletion Methods 0.000 claims description 10
- 230000037430 deletion Effects 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000013508 migration Methods 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000003491 array Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0604—Improving or facilitating administration, e.g. storage management
- G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0683—Plurality of storage devices
- G06F3/0689—Disk arrays, e.g. RAID, JBOD
Abstract
The invention discloses a volume level RAID-based magnetic array management method, a device and a storage medium. The method comprises the steps of receiving a volume creating request, wherein the volume creating request comprises a volume capacity parameter, a RAID type parameter and a distributed disk number parameter; determining disks which can be used for creating the volume according to the volume creating request, and dividing partitions on each determined disk, wherein the partitions on each determined disk form a new created volume; and setting a read-write strategy for the newly created volume according to the RAID type parameter. The invention can set RAID based on the partition, and realizes more flexible RAID strategy.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly relates to a volume-level RAID-based magnetic array management method, a device and a storage medium.
Background
With the development of storage technology, the number of magnetic disks is increasing, and the requirements of applications and systems on reliability, performance, capacity and the like of storage are increasing, especially for distributed storage magnetic arrays, the fault domain generated by the fault of a single disk is expanded. In a conventional RAID (Redundant Arrays of Independent Drives) technology, an RAID is implemented using a whole block of disk as a unit, and data is distributed on a magnetic array by a data stripe, a copy technology, and a data verification technology.
The first generation of RAID1.0 technology was first proposed in the industry, and data is scattered and distributed on a plurality of disks through data striping, and failure recovery of the disks is achieved through copy redundancy. RAID1.0 implements a number of different RAIDs, each with different characteristics, such as RAID10 being able to achieve higher reliability and failure recovery, but with lower space utilization for the disks, higher utilization for RAID5, but lower failure reliability relative to RAID 10. However, RAID1.0 can only be set to one RAID for the entire magnetic array, and cannot modify the RAID type.
Aiming at the defect of RAID1.0, storage companies in the industry propose a new generation RAID, namely RAID 2.0. RAID2.0 realizes layered RAID on the basis of RAID1.0, establishes a layer of logic resource pool on the basis of the original physical disk, and then establishes RAID in the logic resource pool. Compared with the traditional RAID, the RAID2.0 scatters data on all the disks, the whole disk participates in data reading and writing, so that the data reading and writing efficiency is improved, the RAID2.0 supports that different RAID types can be set for different volumes, and different reading and writing requirements of users are met. However, RAID2.0 has a drawback in that, since scattered data is distributed on all disks, there is no definite correspondence between data blocks and physical disks, and therefore there is a possibility that two copies of the same volume fall on the same disk, and reliability is reduced.
Taking RAID1 in the conventional RAID technology as an example, as shown in fig. 1, Disk0 and Disk1 configure a RAID1 mode, two disks are mirror disks, one copy of data needs to be written twice on the two disks, and when reading data, any one of the two disks may be selected to be read, and when one Disk fails, the other Disk may continue to support reading and writing of data. With RAID1 configured, all volumes created on the set of disks will write and read data according to the rules of RAID1. Similarly, RAID0, RAID01, RAID2, RAID3, RAID4, RAID5, etc. all conform to this rule, that is, once the RAID mode of the disk array is set for the disk, all data will be read and written according to this fixed RAID mode rule, and the change of the RAID mode cannot be performed any more unless the disk is formatted again.
Disclosure of Invention
Aiming at least one defect or improvement requirement in the prior art, the invention provides a volume level RAID-based magnetic array management method, a device and a storage medium, which can set RAID based on partitions, and realize more flexible RAID strategies while ensuring the RAID function of each volume.
To achieve the above object, according to a first aspect of the present invention, there is provided a volume-level RAID-based magnetic array management method, including:
receiving a volume creating request, wherein the volume creating request comprises volume capacity parameters, RAID type parameters and distributed disk number parameters;
determining disks which can be used for creating the volume according to the volume creating request, and dividing partitions on each determined disk, wherein the partitions on each determined disk form a new created volume;
and setting a read-write strategy for the newly created volume according to the RAID type parameter.
In one embodiment, the determining, according to the volume creation request, a disk used for creating a volume is specifically:
and calculating the required capacity of each disk partition according to the volume capacity parameter, the RAID type parameter and the number parameter of the distributed disks, and determining the disks which can be used for creating the volume according to the required capacity.
In one embodiment, a magnetic array management method includes:
receiving a capacity expansion request for a specified volume;
and determining all partitions forming the specified volume, and expanding the capacity of all the partitions of the specified volume according to the capacity expansion request.
In one embodiment, a magnetic array management method includes:
receiving a deletion request for a specified volume;
all partitions that make up the specified volume are determined, formatted, and storage space is freed.
In one embodiment, the magnetic array management method may set different RAID type parameters for different volumes created on the magnetic array.
According to a second aspect of the present invention, there is provided a volume-level RAID-based magnetic array management apparatus comprising:
the system comprises a receiving module, a storage module and a sending module, wherein the receiving module is used for receiving a volume creating request which comprises a volume capacity parameter, an RAID type parameter and a distributed disk number parameter;
a creation module, configured to determine disks available for creating a volume according to the volume creation request, and partition a partition on each determined disk, where the partition on each determined disk constitutes a newly created volume;
and the RAID setting module is used for setting a read-write strategy for the newly created volume according to the RAID type parameters.
According to a third aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a magnetic array management method as claimed in any one of the preceding claims.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects: by establishing the RAID on the basis of the partitions, a more flexible RAID strategy can be realized compared with the traditional fixed RAID mode; a RAID strategy with finer granularity, wherein the RAID strategy is set by taking partitions as a unit, and the granularity is smaller, rather than the traditional RAID which takes a disk as a unit; the fault reliability and the read-write performance are consistent with those of the traditional RAID, and function loss does not exist theoretically; the new addition does not cause data migration of the whole magnetic array; the capacity expansion of the volume is supported, the capacity expansion is realized by modifying the size of the partition, the speed is higher, and the data migration cannot be caused; the deletion performance of the volume is also realized by the partition, so that the deletion performance is quicker.
Drawings
FIG. 1 is a schematic diagram of a prior art RAID technique;
FIG. 2 is a schematic diagram illustrating a method for managing a magnetic array based on a volume level RAID according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of a magnetic array management method based on volume level RAID according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The patent provides a magnetic array management method based on volume level RAID, which receives a volume creating request, and sets volume capacity parameters, RAID type parameters and number parameters of distributed disks; determining disks which can be used for creating the volume according to the volume creating request, and dividing partitions on each determined disk, wherein the partitions on each determined disk form a new created volume; and setting a read-write strategy for the newly created volume according to the RAID type parameters. The brand-new disk RAID technology supports volume level RAID, can set different RAID modes for each newly-built volume by taking the newly-built volume as an object, does not set a fixed RAID of a whole magnetic array by taking a disk as a unit any more, and can ensure that each volume still has the set RAID mode function.
According to the volume-level RAID-based magnetic array management method, when a magnetic array receives a volume creation request, the magnetic array determines disks which can be used for creating a volume according to volume capacity size parameters, RAID type parameters and the number of distributed disks in the volume creation request, a partition is divided for the volume on each determined disk, and the partition on each disk forms a newly created volume; the RAID group relationship among a plurality of partitions is established by taking the partitions as units, and meanwhile, each partition is from different physical disks, so that the reliability and the read-write performance of the RAID group on the partition are ensured to be the same as those of the traditional RAID.
In one embodiment, the required capacity of each disk partition is calculated according to the volume capacity parameter, the RAID type parameter and the number of distributed disks parameter, and the disks which can be used for creating the volume are determined according to the required capacity.
A method for managing a magnetic array based on volume level RAID according to the present invention is described with reference to fig. 2. When a volume is created, the number parameter of distributed disks is designated as 4, the magnetic array can determine 4 hard disks meeting the conditions, a partition can be created on each hard disk, and 4 partitions on the 4 hard disks form the volume. Different RAIDs may be provided for different volumes. In the figure, 3 volumes are totally created, Volume0 sets RAID10, Volume1 sets RAID4, and Volume2 sets RAID 5.
When a Disk3 fails, all partitions on the Disk will also fail, and the partitions that make up each volume are in a one-to-one relationship with the Disk, so the reliability of a particular volume is related to the RAID level of the volume. Volume0 is RAID10, so this Volume allows one partition to fail, that is, one disk to fail, but RAID10 results in the Volume space usage being half of the actual occupied space, but the read-write performance is twice that of a normal disk; the Volume1 is RAID4, and has a check Disk, when the check Disk3 fails, the Volume1 can still provide service, but due to the check Disk, the space utilization rate is only 3/4 which actually occupies the space; volume2 is RAID5, like RAID4, supports one block disk failure and has space usage 3/4, but no dedicated parity disk, with parity data distributed across different partitions.
In one embodiment, when the magnetic array receives a volume expansion request for a volume, the magnetic array finds all partitions constituting the volume, and expands the volume of each partition, thereby achieving the effect of expanding the volume space.
In one embodiment, when the magnetic array receives a request for a volume delete, the magnetic array will also find all the partitions that make up the volume, format the partitions, and delete the partitions, freeing the volume space.
In one embodiment, when a new physical hard disk is added to the magnetic array, the existing volume does not undergo data migration due to the newly added disk, and the newly added disk is used to accept the new creation request without affecting the existing volume.
An embodiment of the present invention provides a volume level RAID-based magnetic array management method, as shown in fig. 3, including the steps of:
s1, receiving parameter settings of volume size, RAID type and number of distributed disks;
s2, sending a volume creating request to the magnetic array;
s3, the magnetic array calculates the specified number of disks meeting the requirements according to the size of the volume, the RAID type and the number of the distributed disks, and calculates the size of each disk creating partition;
s4, the magnetic array creates a partition with a corresponding size on each disk according to the calculated partition size;
and S5, the magnetic array sets the data read-write strategy of the volume according to the RAID type of the volume. The traditional volume only has one RAID, all the volumes use the same read-write strategy, different RAID read-write strategies can be set for different volumes, and different read-write strategy interfaces can be called according to different volume RAID types when the magnetic array receives read-write requests.
And S6, when there is a data read-write request of the volume, the magnetic array calls a corresponding data read-write strategy according to the RAID type of the volume to read and write the data.
The magnetic array management device based on the volume level RAID comprises the following components:
the system comprises a receiving module, a sending module and a receiving module, wherein the receiving module is used for receiving a volume creating request which comprises a volume capacity parameter, an RAID type parameter and a distributed disk number parameter;
a creation module, configured to determine disks available for creating a volume according to the volume creation request, and partition a partition on each determined disk, where the partition on each determined disk constitutes a newly created volume;
and the RAID setting module is used for setting a read-write strategy for the newly created volume according to the RAID type parameters.
In one embodiment, the creating module includes a determining module for calculating the required capacity of each disk partition according to the volume capacity parameter, the RAID type parameter and the number of distributed disks parameter, and determining the disks available for creating the volume according to the required capacity.
In one embodiment, the magnetic array management apparatus includes a volume expansion management module, configured to receive a capacity expansion request for a specified volume, determine all partitions constituting the specified volume, and expand the capacity of all partitions of the specified volume according to the capacity expansion request.
In one embodiment, the magnetic array management device comprises a volume deletion management module for receiving a deletion request for a specified volume, determining all partitions constituting the specified volume, formatting all partitions of the specified volume and releasing storage space.
By partitioning, the RAID is established on the partitions according to the storage unit with finer granularity relative to the disk, a more flexible RAID strategy is realized compared with a traditional fixed RAID mode, meanwhile, the RAID level of each volume can be guaranteed not to be degraded, and the read-write performance and the space utilization rate are consistent with those of the traditional RAID, and the method specifically has the following advantages:
1) a more flexible RAID policy, rather than the traditional fixed RAID policy, cannot be changed once set unless the disks are formatted;
2) a RAID strategy with finer granularity, wherein the RAID strategy is set by taking partitions as a unit, and the granularity is smaller, rather than the traditional RAID which takes a disk as a unit;
3) the fault reliability and the read-write performance are consistent with those of the traditional RAID, and function loss does not exist theoretically;
4) the new addition does not cause data migration of the whole magnetic array;
5) the capacity expansion of the volume is supported, the capacity expansion is realized by modifying the size of the partition, the speed is higher, and the data migration cannot be caused;
6) the deletion performance of the volume is also realized by the partition, so that the deletion performance is quicker.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the technical solution of any one of the above embodiments of the magnetic array management method. The implementation principle and technical effect are similar to those of the magnetic array management method, and are not described herein again.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A magnetic array management method based on volume level RAID is characterized by comprising the following steps:
receiving a volume creating request, wherein the volume creating request comprises volume capacity parameters, RAID type parameters and distributed disk number parameters;
determining disks which can be used for creating the volume according to the volume creating request, and dividing partitions on each determined disk, wherein the partitions on each determined disk form a new created volume;
and setting a read-write strategy for the newly created volume according to the RAID type parameter.
2. The volume-level RAID-based magnetic array management method according to claim 1, wherein the determining, according to the volume creation request, a disk used for creating a volume specifically is:
and calculating the required capacity of each disk partition according to the volume capacity parameter, the RAID type parameter and the number parameter of the distributed disks, and determining the disks which can be used for creating the volume according to the required capacity.
3. The volume level RAID-based magnetic array management method according to claim 1 or 2, comprising:
receiving a capacity expansion request for a specified volume;
and determining all partitions forming the specified volume, and expanding the capacity of all the partitions of the specified volume according to the capacity expansion request.
4. The volume level RAID based magnetic array management method of claim 1 or 2,
receiving a deletion request for a specified volume;
all partitions that make up the specified volume are determined, formatted, and storage space is freed.
5. The volume-level RAID-based array management method of claim 1 or 2, wherein different RAID type parameters are set for different volumes created on the array.
6. A volume-level RAID-based magnetic array management apparatus comprising:
the system comprises a receiving module, a storage module and a sending module, wherein the receiving module is used for receiving a volume creating request which comprises a volume capacity parameter, an RAID type parameter and a distributed disk number parameter;
a creation module, configured to determine disks available for creating a volume according to the volume creation request, and partition a partition on each determined disk, where the partition on each determined disk constitutes a newly created volume;
and the RAID setting module is used for setting a read-write strategy for the newly created volume according to the RAID type parameters.
7. The volume-level RAID based magnetic array management apparatus of claim 6 wherein the creation module comprises a determination module for calculating a required capacity of each disk partition based on the volume capacity parameter, the RAID type parameter, and the number of distributed disks parameter, and determining the disks available for creating the volume based on the required capacity.
8. The volume-level RAID-based magnetic array management apparatus according to claim 6 or 7, wherein the volume expansion management module is configured to receive a request for expansion of a specified volume, determine all the partitions constituting the specified volume, and expand all the partitions of the specified volume according to the expansion request.
9. The volume-level RAID-based magnetic matrix management apparatus according to claim 6 or 7, comprising a volume deletion management module configured to receive a deletion request for a specified volume, determine all partitions constituting the specified volume, format all partitions of the specified volume, and release storage space.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
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