CN114722029A - Method, system, device and storage medium for repairing monitor database - Google Patents
Method, system, device and storage medium for repairing monitor database Download PDFInfo
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Abstract
The invention provides a method, a system, equipment and a storage medium for repairing a monitor database, wherein the method comprises the following steps: in response to failure of opening the kvstore when the monitor is started, creating a new directory, and creating a new kvstore in the new directory; writing a repair mark into the new kvstore, and sending broadcast detection messages to other monitors; responding to the received preset type messages returned by the other monitors, sending data synchronization messages and pulling data from the other monitors; and responding to the repair mark as being repaired, and switching the old database and the new database. The invention improves the fault-tolerant capability of the cluster Monitor, solves the problem that the Monitor database cannot be started after the abnormal power failure of the system is caused, automatically repairs the damaged database, and improves the fault-tolerant capability and the competitiveness of the product.
Description
Technical Field
The present invention relates to the field of distributed file systems, and more particularly, to a method, system, device, and storage medium for repairing a monitor database.
Background
The Monitor module is the core module of the distributed file system. The main function of the Monitor module is to manage the cluster and Monitor various states of the cluster. The Monitor is responsible for managing various maps of the cluster, such as OSDMap (OSDMonitor responsible for management), PGMap (PGMonior responsible for management), MDSMap (MDSMonitor responsible for management), and the like. The various maps managed by Monitor are stored in a database, and the Monitor uses kvstore (a type of Monitor database) to store data. The Monitor maintains consistency of the maps of the cluster, so that the data of the multiple Monitor modules in the cluster are consistent, that is, the data stored in the kvstore is uniform. The data stored in the kvstore can ensure that the Monitor can reload the data in the kvstore to restore the normal state after the Monitor fails. It follows that the data in kvstore is critical to Monitor.
The kvstore of Monitor is deployed on physical media such as SSD (solid state disk) or HDD (mechanical hard disk). When the system is abnormally powered off, the kvstore database file of the Monitor is damaged with a small probability, so that the Monitor cannot be started after the node is powered on. After the problem occurs, the Monitor with the fault is removed from the cluster only by manual intervention, and then a new Monitor is expanded again to enter the cluster. If the cluster is not in time for routing inspection, the Monitor fault cannot be eliminated in time, a plurality of Monitor faults can be caused after abnormal power failure for many times, and finally the Monitor cannot meet the requirement of the minimum committee, so that the cluster cannot be used or even cannot be recovered (the database of all monitors is damaged).
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a method, a system, a computer device, and a computer readable storage medium for repairing a Monitor database, which improve the fault tolerance of a cluster Monitor, solve the problem that the Monitor database cannot be started after being damaged due to an abnormal power failure of the system, automatically repair the damaged database, and improve the fault tolerance and competitiveness of the product.
In view of the above, an aspect of the embodiments of the present invention provides a method for repairing a monitor database, including the following steps: in response to failure of opening the kvstore when the monitor is started, creating a new directory, and creating a new kvstore in the new directory; writing a repair mark into the new kvstore, and sending broadcast detection messages to other monitors; sending a data synchronization message to pull data from other monitors in response to receiving the preset type message returned by the other monitors; and responding to the repair mark as being repaired, and switching the old database and the new database.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender.
In some embodiments, the switching between the old and new databases comprises: and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
In another aspect of the embodiments of the present invention, a system for repairing a monitor database is provided, including: the creating module is configured to respond to failure of opening the kvstore when the monitor is started, create a new directory, and create a new kvstore in the new directory; the sending module is configured to write the repair mark into the new kvstore and send a broadcast detection message to other monitor; the acquisition module is configured to respond to the received preset type messages returned by the other monitors and send data synchronization messages to pull data from the other monitors; and the switching module is used for responding to the repair mark as being repaired and switching the new database and the old database.
In some embodiments, the obtaining module is configured to: and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
In some embodiments, the obtaining module is configured to: and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender.
In some embodiments, the switching module is configured to: and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
In another aspect of the embodiments of the present invention, there is also provided a computer device, including: at least one processor; and a memory storing computer instructions executable on the processor, the instructions when executed by the processor implementing the steps of the method as above.
In a further aspect of the embodiments of the present invention, a computer-readable storage medium is also provided, in which a computer program for implementing the above method steps is stored when the computer program is executed by a processor.
The invention has the following beneficial technical effects: the fault tolerance of the cluster Monitor is improved, the problem that the Monitor database cannot be started after the abnormal power failure of the system is solved, the damaged database is automatically repaired, and the fault tolerance and the competitiveness of the product are improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a method for repairing a monitor database provided by the present invention;
FIG. 2 is a schematic diagram of an embodiment of a system for repairing a monitor database provided by the present invention;
FIG. 3 is a schematic diagram of a hardware configuration of an embodiment of a computer device for repairing a monitor database according to the present invention;
FIG. 4 is a schematic diagram of an embodiment of a computer storage medium for repairing a monitor database provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In a first aspect of an embodiment of the present invention, an embodiment of a method for repairing a monitor database is provided. FIG. 1 is a schematic diagram illustrating an embodiment of a method for repairing a monitor database provided by the present invention. As shown in fig. 1, the embodiment of the present invention includes the following steps:
s1, responding to failure of opening the kvstore when the monitor is started, creating a new directory, and creating a new kvstore in the new directory;
s2, writing a repair mark into the new kvstore, and sending broadcast detection messages to other monitors;
s3, responding to the received preset type messages returned by the other monitors, sending data synchronization messages and pulling data from the other monitors; and
and S4, responding to the repair mark as being repaired, and switching the old database and the new database.
And in response to failure of opening the kvstore when the monitor starts, creating a new directory, and creating a new kvstore in the new directory.
And if the kvstore opening fails when the Monitor is started, retrying for 3 times, after the retrying, creating a new directory, and creating a new kvstore in the new directory. And checking whether a new directory exists or not, if not, creating the new directory, if so, checking whether a new kvstore exists or not, otherwise, creating the new kvstore, if not, indicating that the damaged database is being repaired, if the new kvstore exists, interrupting due to reasons such as power failure in the recovery process, and continuing to repair after restarting, and at the moment, opening the new kvstore.
And writing a repair mark into the new kvstore, and sending broadcast probe messages to other monitors. Firstly, checking whether a repair mark exists or not, and if not, writing the repair mark, wherein the state is the state of starting repair. If the repair mark exists, the state of the repair mark is checked, if the state of the repair mark is the state of starting repair, a broadcast detection message is sent to other monitors, and the states of other monitors and the version information (first version information, second version information, last version) in the kvstore are detected. And when receiving the detection message, the other monitors send the current committee member information and the version information (first _ version, last _ version) in the local kvstore to the Monitor to be repaired to the database, wherein the sent message is a Probe _ reply message. When receiving the detection message, the user needs to check whether the user has a repair mark, and if the user is also in the repair database, the user does not respond to the detection message.
And responding to the received preset type messages returned by the other monitor, sending a data synchronization message to pull data from the other monitor. When receiving Probe _ reply, the Monitor to be repaired sends a data synchronization message (Sync message) to pull data from other monitors.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data. And if the first _ version of the sender of the Probe _ reply is greater than 1 and the last _ version in the kvstore database of the Monitor to be repaired is smaller than the first _ version of the sender, emptying the kvstore of the Monitor to be repaired. And then sends a data synchronization message (Sync message, type get _ data _ full) to the sender to ask for the full amount of data.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender. And if the sum of last _ version of the kvstore database of the Monitor to be repaired and 10 less than last _ version of the sender shows that the kvstore has repaired partial data, sending a data synchronization message (Sync message, type get _ data _ receiver) to ask for incremental data. And when the Sync is received, transmitting the data in the kvstore to the Monitor to be repaired for multiple times. And after the Monitor to be repaired synchronizes all the data, modifying the repair mark into a repair completion state.
And responding to the repair mark as the repaired completion, and switching the old database and the new database.
In some embodiments, the switching between the old and new databases comprises: and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory. Specifically, the repaired new kvstore is closed, the damaged database directory is deleted, the repaired new kvstore directory is renamed to the original database directory, the original database directory is opened, the kvstore is opened, the repair mark is deleted, the initialization process is carried out again, and the committee of electing to rejoin the Monitor is initiated.
The invention improves the fault-tolerant capability of the cluster Monitor, solves the problem that the Monitor database cannot be started after the abnormal power failure of the system is caused, automatically repairs the damaged database, and improves the fault-tolerant capability and the competitiveness of the product.
It should be particularly noted that, the steps in the embodiments of the method for repairing a monitor database may be intersected, replaced, added, or deleted, and therefore, these methods for repairing a monitor database with reasonable permutation and combination transformation also belong to the scope of the present invention, and the scope of the present invention should not be limited to the embodiments.
In view of the above, according to a second aspect of the embodiments of the present invention, a system for repairing a monitor database is provided. As shown in fig. 2, the system 200 includes the following modules: the creating module is configured to respond to failure of opening the kvstore when the monitor is started, create a new directory, and create a new kvstore in the new directory; the sending module is configured to write the repair mark into the new kvstore and send a broadcast detection message to other monitor; the acquisition module is configured to respond to the received preset type messages returned by the other monitors and send data synchronization messages to pull data from the other monitors; and the switching module is used for responding to the repair mark as being repaired and switching the new database and the old database.
In some embodiments, the obtaining module is configured to: and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
In some embodiments, the obtaining module is configured to: and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender.
In some embodiments, the switching module is configured to: and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
In view of the above object, a third aspect of the embodiments of the present invention provides a computer device, including: at least one processor; and a memory storing computer instructions executable on the processor, the instructions being executable by the processor to perform the steps of: s1, responding to failure of opening the kvstore when the monitor is started, creating a new directory, and creating a new kvstore in the new directory; s2, writing a repair mark into the new kvstore, and sending broadcast detection messages to other monitors; s3, responding to the received preset type messages returned by other monitors, sending data synchronization messages to pull data from other monitors; and S4, responding to the repair mark as being repaired, and switching between the old database and the new database.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
In some embodiments, the sending the data synchronization message to pull data from the other monitor comprises: and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender.
In some embodiments, the switching between the old and new databases comprises: and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
Fig. 3 is a schematic hardware structural diagram of an embodiment of the computer device for repairing the monitor database according to the present invention.
Taking the device shown in fig. 3 as an example, the device includes a processor 301 and a memory 302.
The processor 301 and the memory 302 may be connected by a bus or other means, such as the bus connection in fig. 3.
The memory 302, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the method for repairing a monitor database in the embodiments of the present application. The processor 301 executes various functional applications of the server and data processing, i.e., implements a method of repairing the monitor database, by executing nonvolatile software programs, instructions, and modules stored in the memory 302.
The memory 302 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the method of repairing the monitor database, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 302 optionally includes memory located remotely from processor 301, which may be connected to a local module via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Any embodiment of a computer device that performs the method for repairing a monitor database described above may achieve the same or similar effects as any of the preceding method embodiments corresponding thereto.
The present invention also provides a computer readable storage medium storing a computer program that, when executed by a processor, performs a method of repairing a monitor database.
FIG. 4 is a schematic diagram of an embodiment of a computer storage medium for repairing a monitor database according to the present invention. Taking the computer storage medium as shown in fig. 4 as an example, the computer readable storage medium 401 stores a computer program 402 which, when executed by a processor, performs the method as described above.
Finally, it should be noted that, as one of ordinary skill in the art can appreciate that all or part of the processes of the methods of the above embodiments can be implemented by a computer program to instruct related hardware, and the program of the method for repairing a monitor database can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods as described above. The storage medium of the program may be a magnetic disk, an optical disk, a read-only memory (ROM), or a Random Access Memory (RAM). The embodiments of the computer program may achieve the same or similar effects as any of the above-described method embodiments corresponding thereto.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, where the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A method for repairing a monitor database, comprising the steps of:
in response to failure of opening the kvstore when the monitor is started, creating a new directory, and creating a new kvstore in the new directory;
writing a repair mark into the new kvstore, and sending broadcast detection messages to other monitors;
sending a data synchronization message to pull data from other monitors in response to receiving the preset type message returned by the other monitors; and
and responding to the repair mark as the repaired completion, and switching the old database and the new database.
2. The method of claim 1, wherein sending the data synchronization message to pull data from other monitors comprises:
and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
3. The method of claim 2, wherein sending the data synchronization message to pull data from other monitors comprises:
and sending data synchronization message claim increment data to the sender in response to the second version information of the monitor to be repaired plus the second version information of which the first number is smaller than the sender.
4. The method of claim 1, wherein the performing the switch between the old database and the new database comprises:
and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
5. A system for repairing a monitor database, comprising:
the creating module is configured to respond to failure of opening the kvstore when the monitor is started, create a new directory, and create a new kvstore in the new directory;
the sending module is configured to write the repair mark into the new kvstore and send a broadcast detection message to other monitor;
the acquisition module is configured to respond to the received preset type messages returned by the other monitors and send data synchronization messages to pull data from the other monitors; and
and the switching module is configured to respond to the repair mark as being repaired and perform switching of the new database and the old database.
6. The system of claim 5, wherein the acquisition module is configured to:
and in response to the fact that the first version information of the sender of the preset type message is larger than a preset value and the second version information of the monitor to be repaired is smaller than the first version information of the sender, emptying the kvstore of the monitor to be repaired, and sending a data synchronization message to the sender to ask for full data.
7. The system of claim 6, wherein the acquisition module is configured to:
and responding to the second version information of the monitor to be repaired and the second version information of which the first number is smaller than the first number of the sender, and sending data synchronization message claim incremental data to the sender.
8. The system of claim 5, wherein the switching module is configured to:
and closing the repaired new kvstore, deleting the damaged database directory, and renaming the repaired new kvstore directory to be the original database directory.
9. A computer device, comprising:
at least one processor; and
a memory storing computer instructions executable on the processor, the instructions when executed by the processor implementing the steps of the method of any one of claims 1 to 4.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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| WO2019153505A1 (en) * | 2018-02-07 | 2019-08-15 | 平安科技（深圳）有限公司 | Method for publishing fault recovery data packet and server |
| CN112764956A (en) * | 2021-01-14 | 2021-05-07 | 网宿科技股份有限公司 | Database exception handling system, and database exception handling method and device |
| CN113590380A (en) * | 2021-06-25 | 2021-11-02 | 济南浪潮数据技术有限公司 | Database recovery method and system |
| CN113821377A (en) * | 2021-08-27 | 2021-12-21 | 济南浪潮数据技术有限公司 | Data recovery method, system and storage medium of distributed storage cluster |
| CN113722155A (en) * | 2021-11-01 | 2021-11-30 | 苏州浪潮智能科技有限公司 | Data backup and repair method in distributed file system and related components |
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