CN116560912B - LVM-based multi-path movable medium data real-time backup and identification method - Google Patents
LVM-based multi-path movable medium data real-time backup and identification method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000926 separation method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000004913 activation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1448—Management of the data involved in backup or backup restore
-
- 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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1456—Hardware arrangements for backup
-
- 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
-
- 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
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/0644—Management of space entities, e.g. partitions, extents, pools
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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
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/065—Replication mechanisms
-
- 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
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a multi-path movable medium data real-time backup and identification method based on LVM. The method comprises the steps of creating N local storage media into N physical volumes in advance, creating a storage pool by the N physical volumes, dividing a logic volume on the storage pool for an application server to use, creating K mobile storage media inserted into the storage server into the physical volumes when data backup is needed, adding the storage pool to which the logic volume to be backed up belongs according to set backup parameters, synchronizing the logic volume to be backed up into K mirror volumes by data, and designating the positions of the mirror volumes in the storage pool; converting the mirrored volume into a linear volume and separating the linear volume from the removable storage media; the mobile storage medium is inserted into other application servers and is activated for specific application identification and access. According to the invention, the inter-system data sharing without direct connection and intercommunication is realized through the mobile storage medium, so that the application in other systems can access specific application data.
Description
Technical Field
The invention relates to the technical field of data real-time copying and identifying methods, in particular to a multi-path movable medium data real-time backup and identifying method based on LVM.
Background
Real-time backup refers to the backup of data which is already stored and normally stored on a storage server by an application server, and the backup process does not interrupt the data access of the application server.
The data backup technology in the prior art commonly seen at present has the following defects:
1. some data backup technologies rely on interconnection and interworking with a storage system, but in practical applications, due to many limitations, it is impossible to access each application server to the storage system. No special storage system is designed for the mobile backup space.
2. Compared with some backups realized based on a user mode scheme, the data needs to be backed up from a kernel mode to a user mode, and then the user mode data is backed up to the kernel mode.
3. Some snapshot-based point-in-time backup techniques, while meeting the needs of a particular data generation, require a backup to be performed in the event of a backup need for continuously new changing data. And snapshot-based backup techniques require an additional backup process of data from the original volume and the snapshot volume.
4. Compared with the snapshot-based time point backup, the process of backing up data from the original volume to the snapshot is avoided, and the data is directly backed up from the original volume to the target volume.
5. There is no differentiation and protection for the backup space. Or using protection logic outside the module, is more complex to manage.
6. It is difficult to manage the priority between backup and traffic.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a multi-path movable medium data real-time backup and identification method based on LVM, wherein a storage server in a storage system is directly connected with a certain application server through a storage protocol, and data storage service is provided for the application server. The data stored on the storage server by the application server can be backed up by a plurality of paths of removable media and respectively provided for application servers in other systems for use.
In order to achieve the above purpose, the present invention provides a method for real-time backup and identification of multi-path movable medium data based on LVM, comprising:
n local storage media are respectively established as N physical volumes in advance, and a storage pool is established for the N physical volumes, wherein the storage pool is divided into logical volumes for an application server to use, and N is a natural number larger than 0;
when data backup is needed, creating K mobile storage media inserted into a storage server as physical volumes, adding storage pools to which a logical volume to be backed up belongs according to set backup parameters, synchronizing the logical volume to be backed up into K mirror image volumes through data, and designating the positions of the mirror image volumes in the storage pools to complete data backup operation, wherein K is a natural number larger than 0;
after the data backup is completed, converting the mirror volume into a linear volume, separating the linear volume from the mobile storage medium, and sequentially obtaining K backup volumes and K backup storage pools;
when the separation is completed, the mobile storage medium is inserted into other application servers, and the backup volume in the mobile storage medium is activated for the specific application to identify and access.
Further, the predefined storage pool may be created only by the local storage medium and, upon creation of the storage pool, the local storage medium used by the storage pool is recorded or subsequently viewed directly by the tool to create the logical volume on the specified storage medium.
Further, when the logical volume is created, a designated physical volume is selected to avoid the logical volume occupying the backup space, and when the physical volume is selected, if the size of the logical volume cannot be satisfied by a piece of physical volume space, a plurality of physical volumes are designated.
Further, the K removable storage media inserted into the storage server are identified by specifying the physical interface location.
Further, the set backup parameters include selecting a storage pool and a logical volume to be backed up, setting a backup policy, setting a default backup priority, setting a read-write mode of the logical volume, and setting a data separation policy.
Further, after the data backup operation is completed, a section of region record log is separately divided in the storage pool to track the region where the mirroring operation is completed.
The beneficial effects are that: 1. according to the invention, the inter-system data sharing of non-direct connection intercommunication is realized through the mobile storage medium, so that the application in other systems can access specific application data;
2. the invention supports simultaneous backup of multiple paths of duplicate data and is distributed on different storage media;
3. the invention increases the local storage and the mobile medium distinguishing and protecting, and avoids the misuse of the mobile space;
4. compared with some backups realized based on user mode schemes (such as dd, copy, xcopy and the like), the invention reduces the backup process of data from user mode to kernel mode, and has more outstanding performance;
5. the invention is realized by the inside of the module, thereby being easier to realize the access priority between the service and the data backup, and meeting the actual demands of service priority, backup priority and the like;
6. the invention is different from the time point backup based on snapshot realization, supports the dynamic backup of data and performs the real-time backup;
7. compared with the snapshot-based time point backup, the method avoids the process of backing up the data from the original volume to the snapshot, and the data is directly backed up from the original volume to the target volume;
8. the invention supports a read-only mode during the backup period, and realizes the time point backup under a specific scene;
9. compared with data backup based on a file system or other data management modes, the invention shields the data format difference and directly copies the disk data.
Drawings
FIG. 1 is a schematic diagram of a method for real-time backup and identification of multi-path removable media data based on LVM according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a logical volume to be backed up after being created as a mirror volume;
FIG. 3 is a schematic diagram of a creation flow of a storage pool;
FIG. 4 is a schematic flow diagram of creating a logical volume within a storage pool;
FIG. 5 is a flow chart for setting backup parameters;
FIG. 6 is a schematic flow chart of data backup;
FIG. 7 is a flow diagram of a mirror separation;
FIG. 8 is a schematic diagram after mirror separation;
FIG. 9 is a schematic diagram of data identification usage after backup.
Detailed Description
The invention will be further illustrated by the following drawings and specific examples, which are carried out on the basis of the technical solutions of the invention, it being understood that these examples are only intended to illustrate the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to 9, an embodiment of the present invention provides a method for real-time backup and identification of multi-path removable media data based on LVM, the method comprising:
referring to fig. 2, N local storage media are created in advance as N Physical Volumes (PV), respectively, and N physical volumes are created as one storage pool (VG), on which logical volumes are divided for use by an application server, where N is a natural number greater than 0. The logical volume is an original volume in the process of data backup, and is mainly used for an application server in a storage system. Creating a storage pool only allows creation using a local storage medium, it may be preset that the storage pool is only created by the local storage medium, and upon creation of the storage pool, the local storage medium used by the storage pool is recorded, or subsequently viewed directly by the tool, to create a logical volume on the designated storage medium. The creation flow of the storage pool can be seen in particular in fig. 3. When creating the logical volume, the designated physical volume may be selected to avoid the logical volume occupying backup space. When selecting a physical volume, if a block of physical volume space cannot meet the logical volume size, a plurality of physical volumes are specified. The creation flow of the logical volume can be seen in particular in fig. 4.
When data backup is needed, firstly, inserting K mobile storage media into a storage server, then creating the K mobile storage media inserted into the storage server as physical volumes, adding a storage pool to which a logical volume to be backed up belongs according to set backup parameters, synchronizing the logical volume to be backed up into K mirror image volumes through data, and designating the positions of the mirror image volumes in the storage pool to complete data backup operation, wherein K is a natural number larger than 0. When adding the mobile storage media into the storage pool to which the logical volume to be backed up belongs, the added mobile media is the number of the needed backup copies.
Referring to fig. 5, when a removable storage medium is inserted into a storage server, identification and display of the removable storage medium is completed first, and it can be determined according to interface location information, physical medium information, etc. when designing a storage system. If a particular SAS/SATA interface is designated as a removable storage media interface, the backup space may be marked by that interface location. When the storage system designs the interactive system, the local storage medium and the mobile backup medium are preferably displayed separately, so that confusion errors are avoided. The K removable storage media inserted into the storage server are preferably identified by specifying the physical interface location. After the identification is completed, backup parameters are required to be set, wherein the set backup parameters comprise the steps of selecting a storage pool and a logic volume to be backed up, setting a backup strategy, setting a default backup priority, setting a read-write mode of the logic volume and setting a data separation strategy. Wherein, setting the backup policy can support immediate backup, and based on the backup policy at a certain time point, temporary backup is not performed (only parameters are set). Setting default backup priority includes realizing service priority by adjusting maximum/minimum bandwidth of data initialization, taking both priority into account, intelligent adjustment and other strategies. The read-write mode of the logic volume is specifically set, and the application server side is allowed to access the storage in a read-only/read-write mode during the data mirroring period. The data separation strategy is specifically to select when to perform copy separation according to whether the image is initialized or not, and can be set to be immediate, manual or a certain non-working time period according to actual requirements. Wherein, immediately means that the mirror image is automatically separated immediately after the initialization synchronization of the mirror image is completed; manually completing data separation by an administrator according to the initialized synchronous state and the actual scene; the non-working time point is that an administrator sets a non-working time, and data separation is automatically completed in the time period after initialization synchronization is completed.
Referring to fig. 6, the above data backup refers to a process of creating a logical volume image, initializing synchronization, and real-time data image. And initializing synchronization, namely, completely backing up the current logic volume to be backed up into the mirror volume. The real-time data mirroring refers to a new data mirroring process after the mirror image is established. After the original volume becomes the mirror volume, a section of region record log is divided in the storage pool separately to track the region where the mirror operation is completed, so as to determine which regions complete the initialization synchronization and which regions need to skip the initialization synchronization.
After the data backup is completed, converting the mirror volume into a linear volume, separating the linear volume from the mobile storage medium, and sequentially obtaining K backup volumes and K backup storage pools. The separation operation may be specifically described with reference to fig. 7, and it is necessary to separate all backup volumes on the removable storage medium first, and then separate individual backup storage pools by taking the removable storage medium as a unit. The results after separation can be seen in FIG. 8. In an LVM system, both physical volumes and mirror volumes on a removable storage medium may be separated individually to form a single storage system. The mapping relation between the volume names and the raw volumes can be established through the volume names in separation, so that the identification of other application servers is facilitated.
When the separation is completed, the mobile storage medium is inserted into other application servers, and the backup volume in the mobile storage medium is activated for the specific application to identify and access. LVM is used as a module in the linux system, and most release boards default to open the function; this function is also easily enabled for non-enabled. After the application server supports the LVM function, the logic volume can be activated through the command line tool, and the application can be directly accessed; or back up to the application server by itself for access. Referring to fig. 9, the logical volume provides a data access service based on a block or shared folder for the application server 1 through a storage protocol, when the logical volume is successfully backed up, only a backup medium needs to be inserted into the application server 2, and after the backup volume is activated, an application can directly access or use a backup function of the application server to backup data to a local access. The activation may be via LVM scan commands or per physical volume, volume group, logical volume activation one by one. The activated logical volume contains data information of the original volume system and can be directly accessed by the application.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to a person of ordinary skill in the art. Modifications and alterations may be made without departing from the principles of this invention, and such modifications and alterations should also be considered as being within the scope of the invention.
Claims (6)
1. The real-time backup and identification method for multi-path movable medium data based on LVM is characterized by comprising the following steps:
n local storage media are respectively established as N physical volumes in advance, and a storage pool is established for the N physical volumes, wherein the storage pool is divided into logical volumes for an application server to use, and N is a natural number larger than 0;
when data backup is needed, creating K mobile storage media inserted into a storage server as physical volumes, adding the mobile storage media into a storage pool to which a logical volume to be backed up belongs according to set backup parameters, synchronizing the logical volume to be backed up into K mirror image volumes through data, and designating the positions of the mirror image volumes in the storage pool so as to complete data backup operation, wherein K is a natural number larger than 0;
after the data backup is completed, converting the mirror volume into a linear volume, separating the linear volume from the mobile storage medium, and sequentially obtaining K backup volumes and K backup storage pools;
when the separation is completed, the mobile storage medium is inserted into other application servers, and the backup volume in the mobile storage medium is activated for the specific application to identify and access.
2. The LVM-based real-time backup and recognition method of multi-path removable media data according to claim 1, wherein the preset storage pool can be created only by a local storage medium, and the local storage medium used by the storage pool is recorded when the storage pool is created, or is directly checked by a tool later, so as to create a logical volume on the designated storage medium.
3. The LVM-based real-time backup and recognition method of multi-path removable media data according to claim 1, wherein when creating a logical volume, a designated physical volume is selected to avoid the logical volume occupying a backup space, and when selecting a physical volume, if a piece of physical volume space cannot satisfy the size of the logical volume, a plurality of physical volumes are designated.
4. The LVM-based real-time backup and recognition method of multi-path removable media data according to claim 1, wherein K removable storage media inserted into the storage server are recognized by designating physical interface locations.
5. The LVM-based real-time backup and identification method of multi-path removable media data according to claim 1, wherein the set backup parameters include selecting a storage pool and a logical volume to be backed up, setting a backup policy, setting a default backup priority, setting a read-write mode of the logical volume, and setting a data separation policy.
6. The LVM-based real-time backup and identification method of multi-path removable media data according to claim 1, wherein after the data backup operation is completed, a section of region record log is separately divided in the storage pool to track the region where the mirroring operation is completed.
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