CN109445694B - Metadata separation method and device for distributed storage system - Google Patents
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- 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
- G06F3/061—Improving I/O performance
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- 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
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- 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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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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Abstract
The application discloses a method and a device for separating metadata of a distributed storage system, wherein the method for separating the metadata of the distributed storage system comprises the following steps: acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located; acquiring a storage fragment mapping relation of the storage pool according to the storage pool identification; and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool. According to the method, the mapping relation of the metadata to be separated in the mapping relation of the storage fragments is adjusted according to the metadata identification, so that the metadata is in an independent storage state in the storage pool corresponding to the adjusted mapping relation of the storage fragments, the time for data input or data output of the distributed storage system is shortened, and the efficiency for data input or data output of the distributed storage system is improved.
Description
Technical Field
The present application relates to the field of computer technologies, and in particular, to a method and an apparatus for separating metadata in a distributed storage system.
Background
Distributed storage systems are becoming increasingly important as storage demands grow rapidly. The distributed storage system includes a storage medium and the storage medium is used to store a variety of data, for example, the storage medium may be used to store metadata. The metadata is data describing data, and descriptive information about data and information resources can be used for indicating a storage location, providing historical data, supporting resource search, and the like.
In the prior art, in order to improve the storage performance of the distributed storage system, a high-performance storage medium is generally used as a storage device for storage, for example, a Solid State Drive (SSD).
However, in order to improve the efficiency of the distributed storage system in data input or data output, when an SSD is configured on each storage node of the distributed storage system and the SSD forms the storage pool, the metadata needs to be separated from the storage pool, so that the separated metadata can be quickly accessed, and the time for searching the metadata when the distributed storage system performs data input or data output can be shortened.
Disclosure of Invention
In order to meet the above requirement, the present application provides a method and an apparatus for separating metadata of a distributed storage system, which can separate metadata from a storage pool, so as to shorten the time for data input or data output of the distributed storage system, and further improve the efficiency for data input or data output of the distributed storage system.
In order to achieve the above purpose, the technical solution provided by the present application is as follows:
the application provides a metadata separation method for a distributed storage system, which comprises the following steps:
acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located;
acquiring a storage fragment mapping relation of the storage pool according to the storage pool identification;
and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
Optionally, after obtaining the mapping relationship between the storage shards in the storage pool according to the storage pool identifier, and before adjusting the mapping relationship between the metadata to be separated in the mapping relationship between the storage shards according to the metadata identifier, the method further includes:
and backing up the storage fragment mapping relation.
Optionally, before adjusting the mapping relationship of the metadata to be separated in the mapping relationship of the storage fragments according to the metadata identifier, the method further includes:
and determining that the number of the hosts of the metadata to be separated is matched with a separation pool.
Optionally, after obtaining the identifier of the metadata to be separated, and before adjusting the mapping relationship of the metadata to be separated in the mapping relationship of the storage fragments according to the identifier of the metadata, the method further includes:
determining that the metadata identification exists.
Optionally, after obtaining the storage pool identifier of the storage pool where the metadata to be separated is located, and before obtaining the storage fragment mapping relationship of the storage pool according to the storage pool identifier, the method further includes:
determining that the storage pool identification exists.
Optionally, after the adjusting the mapping relationship of the metadata to be separated in the mapping relationship of the storage fragments according to the metadata identifier, the method further includes:
and judging whether the metadata to be separated is successfully separated or not, and if not, sending alarm information of metadata separation failure.
The present application further provides a metadata separation apparatus for a distributed storage system, including:
the device comprises a first acquisition unit, a second acquisition unit and a third acquisition unit, wherein the first acquisition unit is used for acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located;
a second obtaining unit, configured to obtain a mapping relationship between storage fragments in the storage pool according to the storage pool identifier;
and the adjusting unit is used for adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
Optionally, the metadata separation apparatus for a distributed storage system further includes:
and the backup unit is used for backing up the mapping relation of the storage fragments.
Optionally, the metadata separation apparatus for a distributed storage system further includes:
and the first determination unit is used for determining that the number of the hosts of the metadata to be separated is matched with the separation pool.
Optionally, the metadata separation apparatus for a distributed storage system further includes:
a second determining unit for determining that the metadata identification exists.
Optionally, the metadata separation apparatus for a distributed storage system further includes:
a third determining unit for determining that the storage pool identification exists.
Compared with the prior art, the method has the advantages that:
the metadata separation method for the distributed storage system comprises the following steps: acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located; acquiring a storage fragment mapping relation of the storage pool according to the storage pool identification; and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool. According to the method, the mapping relation of the metadata to be separated in the mapping relation of the storage fragments is adjusted according to the metadata identification, so that the metadata is in an independent storage state in the storage pool corresponding to the adjusted mapping relation of the storage fragments, the time for data input or data output of the distributed storage system is shortened, and the efficiency for data input or data output of the distributed storage system is improved.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a metadata separation method for a distributed storage system according to an embodiment of the present application;
fig. 2 is a flowchart of another metadata separation method for a distributed storage system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a metadata separation apparatus of a distributed storage system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another distributed storage system metadata separation apparatus according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, this figure is a flowchart of a metadata separation method for a distributed storage system according to an embodiment of the present application.
The metadata separation method for the distributed storage system provided by the embodiment of the application comprises the following steps:
s101: and acquiring a metadata identifier of the metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located.
The metadata identification is used to uniquely identify the metadata.
The storage pool identification is used to uniquely identify the storage pool.
S102: and acquiring the storage fragment mapping relation of the storage pool according to the storage pool identification.
The storage shard map is used to mark a mapping between data stored in the storage pool and storage shards of the storage pool.
Each storage pool has a shard mapping relationship corresponding thereto.
S103: and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
As an example, when the first metadata is stored in the first storage pool, and the mapping relationship between the first metadata and the storage shard storing the first metadata in the first storage pool is included in the storage shard mapping relationship corresponding to the first storage pool, S103 may specifically be: by adjusting the mapping relationship of the storage shards of the first storage pool according to the metadata identification of the first metadata, the mapping relationship between the first metadata and the storage shards storing the first metadata is also adjusted, thereby realizing the separation of the first metadata from the first storage pool.
In addition, in order to ensure storage security of the storage pool and avoid irretrievable damage to storage in the storage pool when the storage fragmentation mapping relationship is adjusted, an embodiment of the present application further provides another implementation manner, where after S102 is executed and before S103 is executed, the method further includes:
and backing up the storage fragment mapping relation.
The metadata separation method for the distributed storage system provided by the embodiment of the application comprises the following steps: acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located; acquiring a storage fragment mapping relation of the storage pool according to the storage pool identification; and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool. According to the method, the mapping relation of the metadata to be separated in the mapping relation of the storage fragments is adjusted according to the metadata identification, so that the metadata is in an independent storage state in the storage pool corresponding to the adjusted mapping relation of the storage fragments, the time for data input or data output of the distributed storage system is shortened, and the efficiency for data input or data output of the distributed storage system is improved. In addition, another implementation of the metadata separation method for the distributed storage system is further provided, and the implementation further includes backing up the storage fragment mapping relationship, so that irretrievable damage to storage in the storage pool when the storage fragment mapping relationship is adjusted is avoided, and storage security of the storage pool is further ensured.
Based on the above provided method for separating metadata of a distributed storage system, the embodiment of the present application further provides another method for separating metadata of a distributed storage system. Which will be described and explained with reference to the drawings.
Example two
The second embodiment is an improvement on the first embodiment, and therefore, for the sake of brevity, the same portions of the second embodiment as those of the first embodiment will not be described again.
Referring to fig. 2, this figure is a flowchart of another method for separating metadata in a distributed storage system according to an embodiment of the present application.
The metadata separation method for the distributed storage system provided by the embodiment of the application comprises the following steps:
s201: and acquiring a metadata identifier of the metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located.
S202: judging whether the storage pool identification exists, if so, executing S203; if not, go to step S212.
S203: and acquiring the storage fragment mapping relation of the storage pool according to the storage pool identification.
S204: judging whether the metadata identifier exists, if so, executing S205; if not, S211 is executed.
S205: judging whether the number of hosts of the metadata to be separated is matched with the separation pool, if so, executing S206; if not, go to S210.
S206: and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
S207: judging whether the metadata to be separated is successfully separated, if so, executing S208; if not, S209 is executed.
S208: and sending out prompt information of successful separation.
S209: and sending alarm information of metadata separation failure.
S201: and sending alarm information of which the metadata is not matched with the separation pool.
S211: and sending alarm information that the metadata does not exist.
S212: and sending alarm information that the storage pool does not exist.
According to the metadata separation method for the distributed storage system, whether the storage pool identification exists or not is judged, whether the metadata identification exists or not is judged, whether the host number of the metadata is matched with the separation pool or not is judged, and whether the metadata to be separated is successfully separated or not is judged, so that a worker can quickly acquire the specific reason of the failure of the metadata separation process according to alarm information, corresponding remedial measures can be conveniently and quickly taken according to the reason of the failure of the metadata separation, and the efficiency and the accuracy of the metadata separation are further ensured.
Based on the above provided method for separating metadata of a distributed storage system, an embodiment of the present application further provides a device for separating metadata of a distributed storage system, which will be explained and explained with reference to the accompanying drawings.
EXAMPLE III
Referring to fig. 3, this figure is a schematic structural diagram of a metadata separation apparatus of a distributed storage system according to an embodiment of the present application.
The metadata separation device for the distributed storage system provided by the embodiment of the application comprises:
a first obtaining unit 301, configured to obtain a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located;
a second obtaining unit 302, configured to obtain a storage fragment mapping relationship of the storage pool according to the storage pool identifier;
an adjusting unit 303, configured to adjust a mapping relationship of the to-be-separated metadata in the storage fragment mapping relationship according to the metadata identifier, so as to separate the to-be-separated metadata from the storage pool.
The metadata separation device for the distributed storage system provided by the embodiment of the application comprises: the device comprises a first obtaining unit 301, a second obtaining unit 302 and an adjusting unit 303, wherein the device adjusts the mapping relationship of the metadata to be separated in the mapping relationship of the storage fragments according to the metadata identifier, so that the metadata is in a state of being stored separately in the storage pool corresponding to the adjusted mapping relationship of the storage fragments, thereby shortening the time for data input or data output of the distributed storage system, and further improving the efficiency for data input or data output of the distributed storage system.
In order to improve the security of the distributed storage system metadata separation apparatus and the efficiency of performing metadata separation, embodiments of the present application further provide another distributed storage system metadata separation apparatus, which will be described and explained below with reference to the accompanying drawings.
Example four
Referring to fig. 4, this figure is a schematic structural diagram of another distributed storage system metadata separation apparatus according to an embodiment of the present application.
The metadata separation device for the distributed storage system provided by the embodiment of the application comprises: a first acquisition unit 301, a second acquisition unit 302, an adjustment unit 303, a backup unit 304, a first determination unit 305, a second determination unit 306, a third determination unit 307, and a judgment unit 308.
The first obtaining unit 301, the second obtaining unit 302, and the adjusting unit 303 are the same as the first obtaining unit 301, the second obtaining unit 302, and the adjusting unit 303 in the above embodiments, and for the sake of simplicity, the description is omitted here.
And a backup unit 304, configured to backup the fragmentation mapping relationship.
A first determining unit 305, configured to determine that the number of hosts in the metadata to be separated matches a separation pool.
A second determining unit 306, configured to determine that the metadata identifier exists.
A third determining unit 307, configured to determine that the storage pool identification exists.
The determining unit 308 is configured to determine whether the metadata to be separated is successfully separated, and if not, send an alarm message indicating that the metadata separation fails.
The metadata separation device for the distributed storage system provided by the embodiment of the application comprises: a first acquisition unit 301, a second acquisition unit 302, an adjustment unit 303, a backup unit 304, a first determination unit 305, a second determination unit 306, a third determination unit 307, and a judgment unit 308. The device backups the mapping relationship of the storage fragments through the backup unit 304, thereby avoiding irreparable damage to the storage of the storage pool when the mapping relationship of the storage fragments is adjusted, and further ensuring the storage safety of the storage pool. In addition, the device also ensures the smooth operation of the metadata separation process through the first determining unit 305, the second determining unit 306, the third determining unit 307 and the judging unit 308, thereby ensuring the efficiency and the accuracy of the metadata separation.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (11)
1. A method for separating metadata of a distributed storage system is characterized by comprising the following steps:
acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located;
acquiring a storage fragment mapping relation of the storage pool according to the storage pool identification;
and adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
2. The method of claim 1, wherein after obtaining the fragmentation mapping of the storage pool according to the storage pool identifier and before adjusting the mapping of the to-be-separated metadata in the fragmentation mapping according to the metadata identifier, further comprising:
and backing up the storage fragment mapping relation.
3. The method according to claim 1, wherein before adjusting the mapping relationship of the metadata to be separated in the storage fragmentation mapping relationship according to the metadata identifier, further comprising:
and determining that the number of hosts of the metadata to be separated is matched with the separation pool.
4. The method according to claim 1, wherein after obtaining the identifier of the metadata to be separated and before adjusting the mapping relationship of the metadata to be separated in the mapping relationship of the storage shards according to the identifier of the metadata, further comprising:
determining that the metadata identification exists.
5. The method of claim 1, wherein after obtaining the storage pool identifier of the storage pool in which the metadata to be separated is located, and before obtaining the storage fragmentation mapping relationship of the storage pool according to the storage pool identifier, further comprising:
determining that the storage pool identification exists.
6. The method according to any one of claims 1 to 5, wherein after the adjusting the mapping relationship of the metadata to be separated in the storage fragmentation mapping relationship according to the metadata identification, further comprising:
and judging whether the metadata to be separated is successfully separated or not, and if not, sending alarm information of metadata separation failure.
7. A distributed storage system metadata separation apparatus, comprising:
the device comprises a first acquisition unit, a second acquisition unit and a third acquisition unit, wherein the first acquisition unit is used for acquiring a metadata identifier of metadata to be separated and a storage pool identifier of a storage pool in which the metadata to be separated is located;
a second obtaining unit, configured to obtain a mapping relationship between storage fragments in the storage pool according to the storage pool identifier;
and the adjusting unit is used for adjusting the mapping relation of the metadata to be separated in the storage fragment mapping relation according to the metadata identification so as to separate the metadata to be separated from the storage pool.
8. The apparatus of claim 7, further comprising:
and the backup unit is used for backing up the mapping relation of the storage fragments.
9. The apparatus of claim 7, further comprising:
and the first determination unit is used for determining that the number of the hosts of the metadata to be separated is matched with the separation pool.
10. The apparatus of claim 7, further comprising:
a second determining unit for determining that the metadata identification exists.
11. The apparatus of claim 7, further comprising:
a third determining unit for determining that the storage pool identification exists.
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