CN110704248B - Disk array reconstruction method and device with adjustable speed and electronic equipment - Google Patents
Disk array reconstruction method and device with adjustable speed and electronic equipment Download PDFInfo
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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
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
- G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
- G06F11/2069—Management of state, configuration or failover
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
- G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
- G06F11/2082—Data synchronisation
Abstract
The embodiment of the application discloses a method and a device for reconstructing a disk array with an adjustable speed and electronic equipment, and the efficiency of disk reconstruction is improved. The method of the embodiment of the application comprises the following steps: determining a reconstruction speed mode according to the attribute of data in the disk array, and establishing the determined reconstruction speed mode when the disk array is established; determining whether reconstruction occurs, if so, reconstructing according to a reconstruction speed mode established in the disk array; when the reconstruction speed mode is a slow speed, the reconstructing is as follows: reconstructing all disk array data; when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between the volume and the disk array, and reconstructing a disk array area allocated by the volume; when the reconstruction speed mode is high speed, the reconstruction is as follows: the written data is reconstructed.
Description
Technical Field
The present application relates to the field of disk storage technologies, and in particular, to a method and an apparatus for reconstructing a disk array with adjustable rate, and an electronic device.
Background
The disk array is mainly used in the field of enterprise-level large data storage such as a storage server and a data server, the disk array (RAID) is a disk group with huge capacity formed by combining a plurality of independent disks, and the performance of the whole disk system is improved by using the addition effect generated by providing data by the disks. When a disk is crashed or the hardware is damaged, the recovery of data stored in the array platform is called disk array data recovery, namely disk array reconstruction.
The conventional disk array reconstruction method means that when a normally used disk fails, an idle standby disk replaces the failed disk immediately, and then data is read from other disks to recover the content on the failed disk. However, the reconstruction efficiency of the conventional disk reconstruction method is low, which is not favorable for the efficient use of users.
Disclosure of Invention
The application provides a disk array reconstruction method and device with an adjustable rate, which are used for solving the problem of low reconstruction efficiency in the traditional disk array reconstruction method.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a first aspect of an embodiment of the present application provides a method for reconstructing a disk array with an adjustable rate, including:
determining a reconstruction speed mode according to the attribute of data in the disk array, and establishing the determined reconstruction speed mode when the disk array is established;
determining whether reconstruction occurs, and if so, reconstructing according to a reconstruction speed mode established in the disk array;
when the reconstruction speed mode is a slow speed, the reconstructing is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between the volume and the disk array, and reconstructing a disk array area allocated by the volume;
when the reconstruction speed mode is high speed, the reconstruction is as follows: the written data is reconstructed.
In some embodiments, the determining a reconstruction speed pattern according to the attributes of the data in the disk array includes:
and when the reconstruction speed mode is judged not to influence the performance and the memory resource of the IO, selecting slow reconstruction.
In some embodiments, the determining a reconstruction speed pattern according to the attributes of the data in the disk array includes:
and when the reconstruction speed mode is judged not to influence the performance of IO and the memory resource, selecting medium-speed reconstruction.
In some embodiments, the determining a reconstruction speed pattern according to the attributes of the data in the disk array includes:
and when judging that the reconstruction speed mode affects the performance and the memory resource of the IO, selecting high-speed reconstruction.
In some embodiments, the written data comprises:
the written data is marked at stripe granularity so that only the marked data is reconstructed when reconstructed.
In some embodiments, the high-speed reconstruction includes:
and establishing a mapping relation between the marked data and the volume so as to clean the marked data when deleting the volume.
In some embodiments, the allocation relationship between the volume and the disk array includes:
a disk array region is allocated to the volume, and the region of the disk array allocated to the volume is smaller than the disk array region.
A second aspect of the embodiments of the present application provides a disk array reconstructing apparatus with an adjustable rate, including:
a selection unit: the method comprises the steps of determining a reconstruction speed mode, and establishing the determined reconstruction speed mode when the disk array is created;
a judging unit: determining whether a reconstruction occurs;
the processing unit is used for carrying out reconstruction according to a reconstruction speed mode established in the disk array when the reconstruction is determined to be needed;
wherein, when the reconstruction speed mode is a slow speed, the reconstruction is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between the volume and the disk array, and reconstructing a disk array area allocated by the volume;
when the reconstruction speed mode is a high speed, the reconstruction is as follows: the written data is reconstructed.
In some embodiments, the determining unit is further configured to determine whether the reconstruction speed mode affects performance and memory resources of the IO.
A third aspect of embodiments of the present application provides an electronic device, including a memory and a processor, wherein the processor is configured to implement the steps of the method for reconstructing a disk array with adjustable rate as described in any one of the above when executing a computer program stored in the memory.
Therefore, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides three reconstruction speed modes, namely slow reconstruction, medium reconstruction and high reconstruction, a user selects the reconstruction speed mode according to actual needs, selects slow reconstruction under the condition that all data in a disk array cannot be lost, selects medium reconstruction under the condition that data of one disk or a plurality of disks in the disk array is necessary, and selects high reconstruction under the condition that only part of written data cannot be lost. After determining a proper reconstruction speed mode according to actual needs, a user establishes the determined reconstruction speed mode when creating the disk array, then carries out reconstruction processing according to the reconstruction speed mode established in the disk array when creating reconstruction according to whether the reconstruction is generated, and selects the proper reconstruction speed mode according to needs, thereby improving the reconstruction efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings without any inventive exercise.
Fig. 1 is a flowchart of a possible speed-adjustable disk array reconstruction method according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a possible rate-adjustable disk array reconfiguration method according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an embodiment of a speed-adjustable disk array reconfiguration device according to an embodiment of the present application;
fig. 4 is a schematic view of an embodiment of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be appreciated by those skilled in the art that the present application may be practiced without departing from the spirit and scope of the present application, and that the present application is not limited to the specific embodiments disclosed below.
The applicant finds that, in a traditional data recovery mode, all data are read from other member disks, a hot spare disk is written in a mirror image mode or a check recalculation mode, the hot spare disk is a spare disk in the disk array, and when a used disk fails, the failed disk is automatically replaced, and data on the failed disk is reconstructed in the hot spare disk. However, such reconstruction methods have problems that reconstruction efficiency is low, reconstruction process is very long, and failure risk is amplified during reconstruction.
In order to improve reconstruction efficiency, only valid data may be reconstructed, and the smaller the reconstruction granularity of the valid data is, the closer the reconstructed data amount is to the actual data amount, the faster the reconstruction speed is, but because the valid data is marked by using a bitmap, more memory resources are consumed, and the valid data is marked in the data allocation processing process, which may affect the IO performance of the storage system. In addition, when the reconstruction processing is performed based on the created volume, the reconstruction method does not affect the performance of IO because the reconstruction area is already determined when the volume is created, but if the size of the volume is equivalent to the size of the disk array, the reconstruction speed is equivalent to the full disk reconstruction speed.
The applicant provides a speed-adjustable disk array reconstruction method, three reconstruction speed modes are provided, and a user selects the reconstruction speed mode according to the self scene requirement. Under the condition that the data of the whole disk array cannot be lost, the user needs to recover the data of the whole disk array, and slow reconstruction is adopted at the moment. Under the condition that data of a certain disk in the disk array cannot be lost and data of other disks in the disk array is no longer needed or is available, a user only needs to reconstruct the disk without reconstructing the whole disk array, and medium-speed reconstruction is adopted at the moment. High speed reconstruction is employed when only a certain portion of the written data is necessary by the user and other data in the disk array is irrelevant. Therefore, the reconstruction speed mode is provided according to the needs of the user, so that the user can select the proper reconstruction speed mode according to the actual needs of the user, and the reconstruction efficiency is improved.
In order to facilitate understanding of the technical solutions of the present application by those skilled in the art, the following describes the method for reconstructing a disk array with adjustable rate provided in the present application in detail with reference to the accompanying drawings.
Referring to fig. 1, this figure is a flowchart of an embodiment of a method for reconstructing a disk array with adjustable rate according to the present application, including the following steps:
101. determining a reconstruction speed mode;
and the user determines a proper reconstruction speed mode according to the attribute of the user to the data in the disk array. The embodiment of the application provides three reconstruction speed modes, namely slow reconstruction, medium reconstruction and high reconstruction, and a user selects one mode according to actual needs. Slow reconstruction, reconstructing all disk array data; medium-speed reconstruction, namely establishing the distribution relation between the volume and the disk array and reconstructing the disk array area distributed by the volume; and reconstructing at high speed, namely reconstructing the written data.
In the case that the data of the entire disk array is necessary, the user needs to recover the data of the entire disk array, and slow reconstruction is adopted. Under the condition that data of a certain disk in the disk array cannot be lost and data of other disks in the disk array is no longer needed or is available, a user only needs to reconstruct the disk without reconstructing the whole disk array, and medium-speed reconstruction is adopted at the moment. High speed reconstruction is employed when only a certain portion of the written data is necessary by the user and other data in the disk array is irrelevant.
102. Establishing the determined reconstruction speed mode when the disk array is established;
the disk array, particularly the array with redundancy capability formed by independent disks, combines a plurality of independent hard disks in different ways to form a hard disk group, so that the user looks like a hard disk, and the user can partition, format and the like the combined disk group. The disk array can provide automatic data backup, and once the user data is damaged, the damaged data can be restored and reconstructed by using backup information, so that the safety of the user data is guaranteed. But the user's demand for data recovery is different, and the unified data recovery form makes the data recovery inefficient. After determining a proper reconstruction speed mode according to the actual requirement of a user on data in the disk array, establishing the determined disk array when the disk array is established.
And when the slow reconstruction processing mode is determined, establishing the slow reconstruction mode when the disk array is established so as to directly reconstruct all disk array data when the disk fails and is reconstructed. When the medium-speed reconstruction processing mode is determined, when the disk array is created, the medium-speed reconstruction mode is established, and the allocation relationship between the volume and the disk array is established, where the volume may be one disk in the disk array or a plurality of disks, and this embodiment is not limited herein, and after the relationship between the volume and the disk array is determined, only the disk array area allocated by the volume may be reconstructed during reconstruction; and when the high-speed reconstruction processing mode is determined, establishing the high-speed reconstruction mode when the disk array is established so as to reconstruct and process the written data after the disk failure.
103. Determining whether a reconstruction occurs;
the disk array reconstruction means that after a certain disk fails, the content of the failed disk is recovered by using the content on the disk which does not fail in the disk array, and the recovered disk is written into a free disk. Step 104 may be performed when reconstruction is required, i.e., to determine whether a disk has failed.
104. Reconstructing according to the reconstruction speed mode established in the disk array;
and performing the reconstruction according to the reconstruction speed mode established in the disk array. When the established reconstruction speed mode is a low speed, reconstructing all disk array data; when the established reconstruction speed mode is a medium speed, reconstructing a disk array area allocated by the volume; and when the established reconstruction speed mode is high speed, reconstructing the written data.
Referring to fig. 2, a flowchart of an embodiment of a method for reconstructing a disk array with adjustable rate provided by the embodiment of the present application includes the following steps:
201. determining a reconstruction speed mode according to actual requirements on data in the disk array;
the embodiment of the application provides three reconstruction speed modes, so that the reconstruction efficiency of a user can be improved. In the case where the data of the entire disk array is useful, the user needs to recover the data of the entire disk array, at which time a slow reconstruction is employed. The slow reconstruction is to reconstruct all disk array data, and when the slow reconstruction is performed, the slow reconstruction speed is slower than the medium-speed reconstruction speed and the high-speed reconstruction speed, but a user does not relate to user data marking in the IO process, the IO performance is not affected, and memory resources are not occupied. Under the condition that data of a certain disk in the disk array cannot be lost and data of other disks in the disk array is not needed or is not needed, a user only needs to reconstruct the disk and does not need to reconstruct the whole disk array, at the moment, medium-speed reconstruction is adopted, medium-speed reconstruction is used for reconstructing an area allocated to a volume, when medium-speed reconstruction is carried out, the medium-speed reconstruction speed is higher than the slow reconstruction speed, and is lower than the high-speed reconstruction speed, the reconstruction area is determined when the disk array is established, the performance of IO cannot be influenced, but certain resources are occupied for saving the allocation relation of the volume and the disk array. However, if the size of the volume is comparable to the size of the disk array, the reconstruction speed is comparable to the full disk reconstruction speed. If the volume occupies a region of the disk array smaller than a region of the disk array, the performance of medium-speed reconstruction is improved more. When only a certain part of written data is necessary for a user and other data in the disk array is irrelevant, high-speed reconstruction is adopted, the written data is reconstructed by the high-speed reconstruction, when high-speed reconstruction processing is carried out, the reconstruction speed is higher than medium-speed reconstruction and slow reconstruction, only marked stripes, namely user data, are reconstructed during reconstruction, and meanwhile, the mapping relation between the volumes and the stripes is established, so that the marks can be cleared when the volumes are deleted. The reconstruction method is fastest, but occupies most resources and has influence on the performance of IO. And when the high-speed reconstruction mode is determined, only the written data is reconstructed for marking during reconstruction. The user determines the reconstruction speed mode based on the actual need for data in the disk array.
202. Establishing the determined reconstruction speed mode when the disk array is created;
after determining a proper reconstruction speed mode according to the actual requirement of a user on data in the disk array, establishing the determined disk array when the disk array is established. After the slow reconstruction mode is determined, the disk array is established to establish the slow reconstruction mode, so that when the disk fails and is reconstructed, all disk array data are directly reconstructed. After the medium-speed reconstruction mode is determined, establishing the medium-speed reconstruction mode when the disk array is established, and establishing the distribution relation between the volume and the disk array so as to reconstruct the disk array area distributed by the volume after the relation between the volume and the disk array is determined; after the high-speed reconstruction mode is determined, when the high-speed reconstruction mode is established when the disk array is established, the written data is marked according to the stripe granularity, so that the written data can be reconstructed when reconstruction processing is carried out after the disk fails, and meanwhile, the mapping relation between the marked data and the volume is established, so that the marked data can be cleaned and deleted when the volume is deleted.
203. Determining whether a reconfiguration has occurred;
the disk array reconstruction means that after a certain disk fails, the content of the failed disk is recovered by using the content on the failed disk in the disk array, and the recovered disk is written into a free disk. Step 204 may be performed when it is determined that a rebuild is required, i.e., when it is determined that a disk has failed.
204. Reconstructing according to the reconstruction speed mode established in the disk array;
and when a user determines a reconstruction speed mode according to actual needs and needs to perform reconstruction processing, performing reconstruction processing according to the reconstruction speed mode established in the disk array. When the established reconstruction speed mode is low speed, directly reconstructing all data of the disk array; when the established reconstruction speed mode is low speed, reconstructing a disk array area allocated by the volume according to the allocation relation of the volume and the disk array; and when the established reconstruction speed mode is high speed, reconstructing the marked data.
The above describes the method for reconstructing a disk array with adjustable rate in this embodiment of the present application, and the following describes the apparatus for reconstructing a disk array with adjustable rate in this embodiment of the present application, with reference to fig. 3, an embodiment of the apparatus for reconstructing a disk array with adjustable rate in this embodiment of the present application may further include:
selection unit 301: the method comprises the steps of determining a reconstruction speed mode, and establishing the determined reconstruction speed mode when a disk array is created;
the judging unit 302: determining whether a reconstruction occurs;
the processing unit 303, when determining that reconstruction is needed, performs the reconstruction according to the reconstruction speed mode established in the disk array;
wherein, when the reconstruction speed mode is a slow speed, the reconstruction is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between a volume and a disk array, and reconstructing a disk array area allocated by the volume, wherein the volume refers to a disk in the disk array;
when the reconstruction speed mode is a high speed, the reconstruction is as follows: the written data is reconstructed.
In some embodiments, the selection unit is further configured to establish a mapping relationship between the volume and the tag data when the high-speed reconstruction mode is selected.
Referring to fig. 4, fig. 4 is a schematic diagram of an embodiment of an electronic device according to an embodiment of the invention.
As shown in fig. 4, an embodiment of the present invention provides an electronic device 400, which includes a memory 401, a processor 402, and a computer program 411 stored in the memory 401 and executable on the processor 402, and when the processor executes the computer program 411, the following steps are implemented:
determining a reconstruction speed mode according to the actual requirement on data in the disk array, and establishing the determined reconstruction speed mode when the disk array is established;
determining whether reconstruction occurs, if so, performing the reconstruction according to a reconstruction speed mode established in the disk array;
wherein, when the reconstruction speed mode is a slow speed, the reconstruction is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between a volume and a disk array, and reconstructing a disk array area allocated by the volume, wherein the volume refers to a disk in the disk array;
when the reconstruction speed mode is high speed, the reconstruction is as follows: the written data is reconstructed.
When the state machine 402 executes the computer program in the embodiment of the present invention, any one of the embodiments corresponding to fig. 1 may be implemented.
Therefore, based on the method described in the embodiment of the present invention, a person skilled in the art can understand a specific implementation manner and various variations of the electronic device of the embodiment, as long as the person skilled in the art implements the device used in the method in the embodiment of the present invention, which belongs to the scope of the present invention to be protected.
The above-described embodiments of the apparatus and system are merely illustrative, and units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Claims (7)
1. A disk array reconstruction method with adjustable speed is characterized in that,
determining a reconstruction speed mode according to the attribute of data in the disk array, and establishing the determined reconstruction speed mode when the disk array is established;
determining whether reconstruction occurs, if so, reconstructing according to a reconstruction speed mode established in the disk array;
wherein, when the reconstruction speed mode is a slow speed, the reconstruction is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between the volume and the disk array, and reconstructing a disk array area allocated by the volume;
when the reconstruction speed mode is high speed, the reconstruction is as follows: reconstructing the written data;
wherein the determining a reconstruction speed mode according to the attribute of the data in the disk array comprises:
when judging that the reconstruction speed mode does not affect the performance of IO and the memory resource, selecting slow reconstruction;
determining a reconstruction speed mode according to the attribute of the data in the disk array comprises:
when judging that the reconstruction speed mode does not influence the performance of IO and influences memory resources, selecting medium-speed reconstruction;
the determining the reconstruction speed mode according to the attribute of the data in the disk array comprises:
and when judging that the reconstruction speed mode affects the performance and the memory resource of the IO, selecting high-speed reconstruction.
2. The method of claim 1, wherein the written data comprises:
the written data is marked at stripe granularity so that only the marked data is reconstructed upon reconstruction.
3. The method of claim 2, wherein the high-speed reconstruction comprises:
and establishing a mapping relation between the marked data and the volume so as to clean the marked data when deleting the volume.
4. The method of claim 1, wherein the assignment of the volume to the disk array comprises:
a disk array region is allocated to the volume, and the disk array region allocated to the volume is smaller than the disk array region.
5. An apparatus for reconstructing a disk array with adjustable speed, comprising:
a selection unit: the method comprises the steps of determining a reconstruction speed mode according to the attribute of data in a disk array, and establishing the determined reconstruction speed mode when the disk array is established;
a judging unit: determining whether a reconfiguration has occurred;
the processing unit is used for carrying out reconstruction according to a reconstruction speed mode established in the disk array when the reconstruction is determined to be needed;
wherein, when the reconstruction speed mode is a slow speed, the reconstruction is as follows: reconstructing all disk array data;
when the reconstruction speed mode is a medium speed, the reconstruction is as follows: establishing an allocation relation between the volume and the disk array, and reconstructing a disk array area allocated by the volume;
when the reconstruction speed mode is a high speed, the reconstruction is as follows: reconstructing the written data;
the determining the reconstruction speed mode according to the attribute of the data in the disk array comprises:
when judging that the reconstruction speed mode does not affect the performance of IO and the memory resource, selecting slow reconstruction;
the determining the reconstruction speed mode according to the attribute of the data in the disk array comprises:
when judging that the reconstruction speed mode does not influence the performance of IO and influences memory resources, selecting medium-speed reconstruction;
determining a reconstruction speed mode according to the attribute of the data in the disk array comprises:
and when judging that the reconstruction speed mode affects the performance and the memory resource of the IO, selecting high-speed reconstruction.
6. The apparatus of claim 5, wherein the determining unit is further configured to determine whether the reconfiguration speed mode affects performance and memory resources of the IO.
7. An electronic device comprising a memory and a processor, wherein the processor is configured to implement the steps of the adjustable rate disk array reconstruction method according to any one of claims 1-4 when executing a computer program stored in the memory.
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| CN101980137B (en) * | 2010-10-19 | 2012-05-30 | 成都市华为赛门铁克科技有限公司 | Method, device and system for reconstructing redundant array of inexpensive disks |
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