CN109063103A - A kind of non-volatile file system of distribution - Google Patents
A kind of non-volatile file system of distribution Download PDFInfo
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- CN109063103A CN109063103A CN201810846379.6A CN201810846379A CN109063103A CN 109063103 A CN109063103 A CN 109063103A CN 201810846379 A CN201810846379 A CN 201810846379A CN 109063103 A CN109063103 A CN 109063103A
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- memory headroom
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Abstract
The invention discloses a kind of non-volatile file system of distribution, including multiple meta data servers, multiple storage servers, one or more nonvolatile memories are provided in each storage server, all nonvolatile memories are mapped to the memory headroom of an entirety；Wherein, any one meta data server, for when receiving the storage request for file destination, file destination to be divided into multiple bands；According to the size of each band, by search space can allocation table, distribute corresponding memory headroom for each band；Initial address and offset of each band in memory headroom are recorded in the metadata of file destination.Using technical solution provided by the embodiment of the present invention, file storage is carried out using nonvolatile memory, quick metadata access may be implemented, reduce the lookup time of metadata, reduces data copy, reduces read and write access delay.
Description
Technical field
The present invention relates to computer application technologies, more particularly to a kind of non-volatile file system of distribution.
Background technique
With the fast development of computer technology, performance gap is increasing between processor and memory, especially locates
The gap for managing performance between device and external memory is particularly evident, so that I/O bottleneck problem becomes increasingly conspicuous.
To alleviate I/O bottleneck problem, conventional method is to reduce access external memory by the way that disk file caching is arranged in memory
Number.
But demand of the growth of data explosion formula to memory size is increasing, and conventional method is by increasing buffer memory capacity band
The benefit come is reduced instead, and frequent exchange data can generate biggish expense between interior external memory, and read and write access delay is larger.
Summary of the invention
The object of the present invention is to provide a kind of non-volatile file system of distribution to be subtracted with realizing quick metadata access
Few metadata lookup time, data copy is reduced, reduces read and write access delay.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of non-volatile file system of distribution, including multiple meta data servers, multiple storage servers, each storage
One or more nonvolatile memories are provided in server, all nonvolatile memories are mapped to the memory headroom of an entirety；Its
In,
Any one meta data server, for receive for file destination storage request when, by the target
File is divided into multiple bands；According to the size of each band, by search space can allocation table, it is corresponding for the distribution of each band
Memory headroom；Initial address and offset of each band in memory headroom are recorded in the metadata of the file destination
Amount.
In a kind of specific embodiment of the invention,
Any one meta data server, when being specifically used for carrying storage position information in storage request, according to
The size of each band, by search space can allocation table, be preferentially every in the corresponding storage server in the storage position
A band distributes corresponding memory headroom.
In a kind of specific embodiment of the invention,
Any one meta data server, specifically for according to the size of each band and the load journey of storage server
Degree, by search space can allocation table, distribute corresponding memory headroom for each band.
In a kind of specific embodiment of the invention,
Any one meta data server, specifically for the size according to each band, by search space can allocation table,
It is that each band distributes corresponding memory headroom in the memory headroom that loading level is less than the storage server of preset threshold.
In a kind of specific embodiment of the invention,
Any one meta data server is also used to when monitoring that memory headroom has space release, can in the space
The memory headroom of release is recorded in allocation table.
In a kind of specific embodiment of the invention,
Any one meta data server is also used to when receiving the storage request for file destination, by the mesh
The wave file of mark file is mapped to memory headroom storage.
In a kind of specific embodiment of the invention, the ground for the whole memory headroom that all nonvolatile memories are mapped to
Location is globally shared.
In a kind of specific embodiment of the invention, the ground for the whole memory headroom that all nonvolatile memories are mapped to
Location includes virtual address and physical address.
In a kind of specific embodiment of the invention,
Any one meta data server, specifically for including recording each band in the metadata of the file destination
Deposit initial fictive address and the offset in space.
In a kind of specific embodiment of the invention,
Any one meta data server is also used to when receiving the access request for the file destination, according to
Initial fictive address and offset of the file destination in memory headroom determine the mesh by audit memory mapping table
The physical start address of file is marked, and reads the file destination.
Using technical solution provided by the embodiment of the present invention, each storage server in distributed non-volatile file system
In be provided with one or more nonvolatile memories, all nonvolatile memories are mapped to the memory headroom of an entirety, metadata clothes
File destination is divided into multiple bands, according to each band when receiving the storage request for file destination by business device
Size, by search space can allocation table, distribute corresponding memory headroom for each band, remember in the metadata of file destination
Record initial address and offset of each band in memory headroom.File storage is carried out using nonvolatile memory, may be implemented
Quick metadata access reduces the lookup time of metadata, reduces data copy, reduces read and write access delay.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the non-volatile file system of distribution in the embodiment of the present invention；
Fig. 2 is a kind of implementation flow chart of file memory method in the embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of non-volatile file system of distribution, the non-volatile file system of the distribution includes
Multiple meta data servers, multiple storage servers are provided with one or more nonvolatile memories, institute in each storage server
There is nonvolatile memory to be mapped to the memory headroom of an entirety.The storage that file is carried out by means of nonvolatile memory, can be more preferable
Ground utilizes the random access performance of non-volatile memory apparatus.The address for the whole memory headroom that all nonvolatile memories are mapped to
Globally shared, the nodes such as all meta data servers, storage server can be seen consistent in distributed non-volatile file system
View.I.e. each nonvolatile memory forms the memory headroom in each storage server and is managed collectively, and is mapped to an entirety
Memory headroom, same address is directed toward the same position, this unify address space can byte addressing, by persistence it is non-volatile in
Deposit composition.
As shown in Figure 1, for the structural schematic diagram of distributed non-volatile file system, including meta data server 1, metadata
Server 2, meta data server 3, storage server 1, storage server 2, storage server 3 are set in each storage server
It sets there are two nonvolatile memory, all nonvolatile memories are mapped to the memory headroom of an entirety, the memory headroom tool of the entirety
It is distributed the characteristics such as formula, highly reliable, persistence, unified address, byte addressing.Client can be by file by meta data server
It stores to memory headroom, while file can be read in memory headroom, execute corresponding I/O operation.It supports multi-user, concurrently visit
It asks.
It should be noted that meta data server, storage server shown in Fig. 1, nonvolatile memory number are merely illustrative,
In practical application, there can be more.
As shown in Fig. 2, any one meta data server passes through following steps in the non-volatile file system of the distribution
Carry out file storage:
S210: when receiving the storage request for file destination, the file destination is divided into multiple bands；
S220: according to the size of each band, by search space can allocation table, distribute corresponding memory for each band
Space；
S230: initial address and offset of each band in memory headroom are recorded in the metadata of the file destination
Amount.
In embodiments of the present invention, client can be issued to corresponding meta data server for text according to actual needs
The storage of part is requested.For any one meta data server in distributed non-volatile file system, metadata clothes
File destination can be divided into multiple bands when receiving the storage request for file destination by business device.
Specifically, division rule can be preset, for example, divided according to being sized, last after division
A stripe size is sized less than or equal to this, alternatively, dividing according to files in different types setting different size.Metadata clothes
Business device can carry out band division to file destination according to the setting rule, obtain multiple bands.
After file destination is divided into multiple bands, search space can be passed through further according to the size of each band
Can allocation table, distribute corresponding memory headroom for each band.Space can have the free time for being currently available for distribution by record in allocation table
Memory headroom.By search space can allocation table, can know the size of the memory headroom of each free time.Each band it is big
It is small may it is identical or different, for each band distribute corresponding memory headroom when, as far as possible progress size matching, avoid fractionlet and
The formation in cavity.
In a kind of specific embodiment of the invention, any one meta data server is specifically used in storage request
When carrying storage position information, according to the size of each band, by search space can allocation table, it is preferentially corresponding in storage position
Storage server in be that each band distributes corresponding memory headroom.
In practical applications, client can file determines according to actual conditions storage position, such as according to storage service
Load state, communication cost of device etc. determine, can carry storage position information in storage request in this way.Meta data server
When receiving the storage request for file destination, the storage position information carried in storage request can be obtained.By target
After file is divided into multiple bands, can according to the size of each band, by search space can allocation table, preferential selection storage
The memory headroom of the corresponding storage server in position is allocated.When in the corresponding storage server in storage position not free time
When depositing space, the memory headroom of other storage servers can be distributed according to default rule.
In another specific embodiment of the invention, any one meta data server is specifically used for according to each
The size of band and the loading level of storage server, by search space can allocation table, distribute corresponding memory for each band
Space.
Specifically, can according to the size of each band, by search space can allocation table, be less than in loading level default
It is that each band distributes corresponding memory headroom in the memory headroom of the storage server of threshold value.
In embodiments of the present invention, meta data server is when receiving the storage request for file destination, Ke Yixian
Obtain storage server loading level, by search space can allocation table, determine loading level be less than preset threshold storage
The memory headroom of free time in server is that each band is adaptive in these memory headrooms according to the size of each band
Distribute corresponding memory headroom.
After distributing corresponding memory headroom for each band, each band is recorded in the metadata of file destination in memory
Initial address and offset in space.
Specifically, initial fictive address of each band in memory headroom can be recorded in the metadata of file destination
And offset.
In embodiments of the present invention, the address for the whole memory headroom that all nonvolatile memories are mapped to includes virtually
Location and physical address, i.e., the whole memory headroom that all nonvolatile memories are mapped to can be divided into virtual address space and physics
Address space.Physical address space refers to PM (Persistent Memory, lasting memory), storage include PM metadata information,
Memory mapping table, file system space etc..PM metadata information include PM interior size, metadata partition initial position, reflect
The initial position of firing table and size, the initial position of file system space and size.Memory mapping table saves file system sky
Between page (page) arrive virtual address mapping.File system space saves the data of true file, metadata information.
In one embodiment of the invention, any one meta data server is also used to receiving for file destination
Access request when, according to initial fictive address of the file destination in memory headroom and offset, mapped by audit memory
Table, determines the physical start address of file destination, and reads the file destination.
File destination is mapped to after being stored in memory headroom, client can access to file destination.Member
Data server is when receiving the access request for file destination, according to initial fictive of the file destination in memory headroom
Address and offset can determine the physical start address of file destination by audit memory mapping table, be originated based on the physics
Address and offset can read file destination, respond access request.
It divides documents into page and is mapped to virtual address, guarantee that virtual address is continuous.Text need to only be recorded to the access of file
The initial fictive address of part and offset can find the storage position of file.When offset is added in the initial position to file
The position of file need to be recalculated.Virtual address is loaded in memory headroom, and the access efficiency of file system can be improved.Virtually
The space structure of address includes superblock super block, metadata table inode table and file area file region.
In one embodiment of the invention, any one meta data server is also used to monitoring that memory headroom is free
Between when discharging, the memory headroom of release can be recorded in allocation table in space.
The file stored in memory headroom may be because of reasons releasing memory spaces such as deletions.Meta data server is being supervised
When measuring memory headroom has space release, the memory headroom of release can be recorded in allocation table in space, by the memory of release
Space sub-distribution again, realizes the recycling and reusing of memory headroom.Space can the size of memory headroom can be with byte in allocation table
For unit, the waste of memory headroom is avoided.
In one embodiment of the invention, any one meta data server is also used to receiving for file destination
Storage request when, by the wave file of file destination be mapped to memory headroom storage.It can for the storage mode of wave file
With consistent with file destination, details are not described herein for the embodiment of the present invention.
Using technical solution provided by the embodiment of the present invention, each storage server in distributed non-volatile file system
In be provided with one or more nonvolatile memories, all nonvolatile memories are mapped to the memory headroom of an entirety, metadata clothes
File destination is divided into multiple bands, according to each band when receiving the storage request for file destination by business device
Size, by search space can allocation table, distribute corresponding memory headroom for each band, remember in the metadata of file destination
Record initial address and offset of each band in memory headroom.File storage is carried out using nonvolatile memory, may be implemented
Quick metadata access reduces the lookup time of metadata, reduces data copy, reduces read and write access delay.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand technical solution of the present invention and its core concept.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of non-volatile file system of distribution, which is characterized in that including multiple meta data servers, multiple storage services
Device is provided with one or more nonvolatile memories in each storage server, and all nonvolatile memories are mapped to an entirety
Memory headroom；Wherein,
Any one meta data server, for receive for file destination storage request when, by the file destination
It is divided into multiple bands；According to the size of each band, by search space can allocation table, for the distribution of each band it is corresponding in
Deposit space；Initial address and offset of each band in memory headroom are recorded in the metadata of the file destination.
2. the non-volatile file system of distribution according to claim 1, which is characterized in that
Any one meta data server, when being specifically used for carrying storage position information in storage request, according to each
The size of band, by search space can allocation table, be preferentially each in the corresponding storage server in the storage position
Band distributes corresponding memory headroom.
3. the non-volatile file system of distribution according to claim 1, which is characterized in that
Any one meta data server, specifically for leading to according to the size of each band and the loading level of storage server
Cross search space can allocation table, distribute corresponding memory headroom for each band.
4. the non-volatile file system of distribution according to claim 3, which is characterized in that
Any one meta data server, specifically for the size according to each band, by search space can allocation table, negative
It is that each band distributes corresponding memory headroom that load degree, which is less than in the memory headroom of the storage server of preset threshold,.
5. according to claim 1 to described in any item non-volatile file system of distribution among 4, which is characterized in that
Any one meta data server is also used to when monitoring that memory headroom has space release, can be distributed in the space
The memory headroom of release is recorded in table.
6. the non-volatile file system of distribution according to claim 1, which is characterized in that
Any one meta data server is also used to when receiving the storage request for file destination, by the target text
The wave file of part is mapped to memory headroom storage.
7. the non-volatile file system of distribution according to claim 1, which is characterized in that all nonvolatile memories are mapped to
Whole memory headroom address it is globally shared.
8. the non-volatile file system of distribution according to claim 7, which is characterized in that all nonvolatile memories are mapped to
The address of whole memory headroom include virtual address and physical address.
9. the non-volatile file system of distribution according to claim 8, which is characterized in that
Any one meta data server, specifically for recording each band in the metadata of the file destination in memory sky
Between in initial fictive address and offset.
10. the non-volatile file system of distribution according to claim 9, which is characterized in that
Any one meta data server is also used to when receiving the access request for the file destination, according to described
Initial fictive address and offset of the file destination in memory headroom determine the target text by audit memory mapping table
The physical start address of part, and read the file destination.
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| CN111435342A (en) * | 2019-01-14 | 2020-07-21 | 深圳市茁壮网络股份有限公司 | Poster updating method, poster updating system and poster management system |
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Application publication date: 20181221 |