CN109739819A - Snapshot lossless compression method, device, equipment and the readable storage medium storing program for executing that can be recalled - Google Patents
Snapshot lossless compression method, device, equipment and the readable storage medium storing program for executing that can be recalled Download PDFInfo
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- CN109739819A CN109739819A CN201910036860.3A CN201910036860A CN109739819A CN 109739819 A CN109739819 A CN 109739819A CN 201910036860 A CN201910036860 A CN 201910036860A CN 109739819 A CN109739819 A CN 109739819A
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Abstract
The invention discloses the snapshot lossless compression methods that one kind can be recalled, and this method comprises the following steps: snapshot is raw data formatting；Obtain snapshot data；The variable quantity of the snapshot data is subjected to compression storage.Meanwhile the invention also discloses snapshot lossless compression device, equipment and readable storage medium storing program for executing that one kind can be recalled.Snapshot lossless compression method, device, equipment and the readable storage medium storing program for executing according to an embodiment of the present invention recalled, by the way that snapshot is raw data formatting, and the variable quantity of snapshot data is subjected to compression storage, it may be implemented under the premise of not wasting memory space, support the snapshot data of backtracking history any time point, it supports query history full dose data, saves memory space.
Description
Technical field
The present invention relates to technical field of data storage, and in particular to one kind can recall snapshot lossless compression method, device,
Equipment and readable storage medium storing program for executing.
Background technique
In field of data storage, snapshot is function indispensable in online storage subsystem.It is able to carry out online data
Backup and recovery provide spare data access channel for storage user.
The management of snapshot generally comprises the operation such as creation, recovery, deletion, wherein recovery, deletion of snapshot etc. operate foundation
The information generated when creation operation carries out.It stores currently, snapshot stores common snapshot one is the increment that can not be recalled storage,
Will to be stored in row database after list element fractionation in snapshot, row is directly inserted into for the increase information changed between snapshot
In database, the modification between snapshot can not be recorded and delete information, when so that a certain history can not be reverted to snapshot data
Between point.Another common snapshot storage is that redundancy recalls storage method, individually to store every portion snapshot, for fast
According to the data redundancy not a changed storage, memory space is greatly wasted.And for the data of same dimension, inquiry is gone through
History full dose data, queries is big, and time-consuming for calculating.
The technical problem to be solved in the present invention: under the premise of not wasting memory space, quick search is supported sometime
The historical snapshot put and the history full dose data with dimension.
Therefore, it takes into account memory space and facilitates the date storage method of inquiry, be that those skilled in the art need to solve
The problem of.
Summary of the invention
The present invention provides a kind of snapshot lossless compression method, device, equipment and readable storage medium storing program for executing that can be recalled, and solves mesh
Preceding memory space and the problems such as facilitate inquiry cannot be considered in terms of.
According to an aspect of the present invention, a kind of snapshot lossless compression method that can be recalled is provided, is included the following steps:
Snapshot is raw data formatting；
Obtain snapshot data；
The variable quantity of the snapshot data is subjected to compression storage.
The step that snapshot is raw data formatting in one of the embodiments, for by the snapshot original number
According to be converted into list, can not nested dictionary and can one of three kinds of data structures of nested dictionary.
The variable quantity by snapshot data carries out the step of compression storage in one of the embodiments, including as follows
Step:
The unique identification for judging whether there is the corresponding entity of snapshot of acquisition, if so, then calculating the snapshot data
With the variable quantity of nearest snapshot data, and the variable quantity is stored；If it is not, by fast on the basis of snapshot data storage
According to.
This method further includes the steps that recalling history predetermined point of time snapshot data in one of the embodiments, specifically
Include the following steps:
Obtain baseline snapshot；
Sequentially in time, it obtains from the baseline snapshot to all changes amount of the predetermined point of time snapshot data；
On the basis of the baseline snapshot, all changes amount is restored, obtains the predetermined point of time snapshot data.
This method further includes the steps that query history full dose data in one of the embodiments, specifically includes following step
It is rapid:
Obtain baseline snapshot；
Obtain all changes amount of the point snapshot data from the baseline snapshot to query time；
On the basis of the baseline snapshot, all increased variable quantities are restored and give up the variable quantity of deletion, acquisition is looked into
Ask the history full dose data at time point.
According to another aspect of the present invention, a kind of snapshot lossless compression device that can be recalled also is provided, which is characterized in that
Include:
Formatting module, for snapshot is raw data formatting；
Snapshot data obtains module, for obtaining snapshot data；
Memory module is compressed, for the variable quantity of the snapshot data to be carried out compression storage.
The formatting module is used to convert the snapshot initial data to list, no in one of the embodiments,
Can nested dictionary with can one of nested three data structures of dictionary.
The compression memory module includes: in one of the embodiments,
Judging unit, the unique identification of the corresponding entity of snapshot for judging whether there is acquisition；
Variable quantity computing unit, it is described fast for calculating when there is the unique identification of the corresponding entity of snapshot obtained
According to the variable quantity of data and nearest snapshot data；
Storage unit, for when there is no obtain the corresponding entity of snapshot unique identification when, by the snapshot data
It is stored as baseline snapshot and the storage variable quantity.
The device further includes backtracking module in one of the embodiments, for recalling history predetermined point of time snapshot number
According to；Include:
First acquisition unit, for obtaining baseline snapshot, and sequentially in time, from baseline snapshot to the pre- timing
Between put snapshot data all changes amount；
Recall data capture unit, on the basis of the baseline snapshot, all changes amount to be restored, obtains described pre-
It fixes time a snapshot data.
The device further includes full dose enquiry module in one of the embodiments, is used for query history full dose data；Packet
It includes:
Second acquisition unit, for obtaining baseline snapshot, and from baseline snapshot to query time point snapshot data institute
The amount of changing；
Full dose query unit, for all increased variable quantities being restored and being given up and are deleted on the basis of the baseline snapshot
The variable quantity removed obtains the history full dose data of query time point.
According to another aspect of the present invention, a kind of snapshot lossless compression equipment that can be recalled also is provided, comprising:
Processor；And
Memory is stored thereon with executable code, when the executable code is executed by the processor, makes described
Processor executes the snapshot lossless compression method recalled as described in above-mentioned any one.
According to another aspect of the present invention, a kind of non-transitory machinable medium is also provided, is stored thereon with
Executable code makes the processor execute such as above-mentioned when the executable code is executed by the processor of calculating equipment
The snapshot lossless compression method recalled described in one.
Snapshot lossless compression method, device, equipment and the readable storage medium storing program for executing according to an embodiment of the present invention recalled leads to
It crosses snapshot is raw data formatting, and the variable quantity of snapshot data is subjected to compression storage, may be implemented do not wasting storage
Under the premise of space, the snapshot data of backtracking history any time point being supported, supporting query history full dose data, it is empty to save storage
Between.
Detailed description of the invention
By reading detailed description of non-limiting embodiments referring to the drawings, other feature of the invention,
Objects and advantages will become more apparent upon, wherein the same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 shows the snapshot lossless compression method flow chart recalled of one embodiment of the invention；
Fig. 2 shows the snapshot lossless compression method flow charts recalled of another embodiment of the present invention；
Fig. 3 shows the snapshot lossless compression method schematic diagram recalled using one embodiment of the invention；
Fig. 4, which is shown, carries out the backtracking pre- timing of history using the snapshot lossless compression method recalled of one embodiment of the invention
Between put snapshot schematic diagram；
Fig. 5, which is shown, carries out query history full dose number using the snapshot lossless compression method recalled of one embodiment of the invention
According to schematic diagram；
Fig. 6 shows the snapshot lossless compression schematic device recalled of one embodiment of the invention；
Fig. 7 shows the snapshot lossless compression schematic device recalled of another embodiment of the present invention.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, below in conjunction with drawings and the specific embodiments, the present invention is carried out further detailed
Description.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting this hair
It is bright.To those skilled in the art, the present invention can be in the case where not needing some details in these details
Implement.The description of embodiment is preferably managed just for the sake of being provided by showing example of the invention of the invention below
Solution.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
It is the snapshot lossless compression method flow chart recalled of one embodiment of the invention shown in Fig. 1.
It is the snapshot lossless compression method flow chart recalled of another embodiment of the present invention shown in Fig. 2.
The snapshot lossless compression method that one kind of the present invention can be recalled is explained in detail below with reference to Fig. 1-2 illustrated embodiment
It states.
With reference to Fig. 1, a kind of snapshot lossless compression method 100 recalled, this method comprises the following steps:
Step S120: snapshot is raw data formatting.
Wherein, the step that snapshot is raw data formatting, to convert list for snapshot initial data, can not nested word
Allusion quotation and can one of nested three kinds of data structures of dictionary.Certainly, do not limit can only will be raw data formatting by the present invention
For above-mentioned format.
Step S140: snapshot data is obtained.
Sequentially in time, according to actual demand, acquisition snapshot data gradually.
Step S160: the variable quantity of the snapshot data is subjected to compression storage.
Wherein, the step of variable quantity of snapshot data is carried out compression storage by step S160, specifically comprises the following steps:
Step S162: the unique identification of the corresponding entity of snapshot of acquisition is judged whether there is, if it is present executing step
Rapid S166: calculating the variable quantity of the snapshot data Yu nearest snapshot data, and stores the variable quantity；If it does not exist, then
It executes step S164 and the snapshot data is stored as baseline snapshot.
Wherein, the unique identification for judging whether there is the corresponding entity of snapshot of acquisition, refer to judge in database whether
There are the unique identifications that snapshot corresponds to physical entity.
The management of snapshot generally comprises the operation such as creation, recovery, deletion.Wherein, recovery, deletion of snapshot etc. operate foundation
The information generated when creation operation carries out, and therefore, creation snapshot is the first step for carrying out snapshot management.It is fast if it is obtaining for the first time
According to data, i.e., using the snapshot data as baseline snapshot, as the subsequent basis deleted.
The snapshot lossless compression method that can be recalled using the present invention, can be used for recalling history predetermined point of time snapshot data
The step of, specifically comprise the following steps:
Obtain baseline snapshot；
Sequentially in time, it obtains from the baseline snapshot to all changes amount of the predetermined point of time snapshot data；
And
On the basis of the baseline snapshot, all changes amount is restored, obtains the predetermined point of time snapshot data.
Using the snapshot lossless compression method that can recall of the present invention, can be with query history full dose data the step of, specifically
Include the following steps:
Obtain baseline snapshot；
Obtain all changes amount of the point snapshot data from the baseline snapshot to query time；And
On the basis of the baseline snapshot, all increased variable quantities are restored and give up the variable quantity of deletion, acquisition is looked into
Ask the history full dose data at time point.
The snapshot lossless compression method according to an embodiment of the present invention recalled, by the way that snapshot is raw data formatting,
And the variable quantity of snapshot data is subjected to compression storage, it may be implemented under the premise of not wasting memory space, backtracking supported to go through
The snapshot data of history any time point supports query history full dose data, saves memory space.
Shown in Fig. 3, for the snapshot lossless compression method schematic diagram recalled for using one embodiment of the invention.
It is pre- to use the snapshot lossless compression method recalled of one embodiment of the invention to carry out backtracking history shown in Fig. 4
It fixes time a snapshot schematic diagram.
It is complete to use the snapshot lossless compression method recalled of one embodiment of the invention to carry out query history shown in Fig. 5
Measure the schematic diagram of data.
The embodiment of 3-5 with reference to the accompanying drawing specifically describes the snapshot lossless compression method that the present invention can recall, and makes
Backtracking history, which is carried out, with the snapshot lossless compression method that the present invention can recall sometime puts snapshot and query history full dose number
According to.
It is first that snapshot is raw data formatting for listings format for snapshot is carried out compressed schematic diagram with reference to Fig. 3；
It regard the snapshot data [1,2,3,4,5,6] of timing node 20180101 as baseline snapshot, timing node is then calculated with this
20180102,20180103 and 20180104 snapshot data variable quantity simultaneously carries out compression storage.In this way, greatly reducing storage
Amount.
This method supports the snapshot data of backtracking history any time point under the premise of not wasting memory space.
With reference to Fig. 4, when backtracking history sometime puts snapshot, takes out snapshot and correspond to benchmark and from benchmark to the backtracking time
Point all changes amount restores the variation of all increases and deletion, obtains the snapshot at corresponding backtracking time point with this.
This method supports query history full dose data under the premise of not wasting memory space.
With reference to Fig. 5, when query history full dose data, take out that snapshot correspond to benchmark and point owns from benchmark to query time
All increased variations are restored, give up to fall the variation of deletion by variable quantity, to obtain corresponding time point history full dose data.
The snapshot lossless compression method according to the present invention recalled above is described in detail by reference to attached drawing 1-5.
In addition, being also implemented as a kind of computer program or computer program product, the meter according to the method for the present invention
Calculation machine program or computer program product include the calculating for executing the above steps limited in the above method of the invention
Machine program code instruction.
Alternatively, the present invention can also be embodied as a kind of (or the computer-readable storage of non-transitory machinable medium
Medium or machine readable storage medium), it is stored thereon with executable code (or computer program or computer instruction code),
When the executable code (or computer program or computer instruction code) by electronic equipment (or calculate equipment, server
Deng) processor execute when, so that the processor is executed each step according to the above method of the present invention.
It is the snapshot lossless compression schematic device recalled of one embodiment of the invention shown in Fig. 6.
It is the snapshot lossless compression schematic device recalled of further embodiment of this invention shown in Fig. 7.
The snapshot lossless compression device that one kind of the present invention can be recalled is specifically described below with reference to Fig. 6-7.
With reference to Fig. 6, a kind of snapshot lossless compression device 200 recalled, including formatting module 210, snapshot data obtains
Modulus block 230 and compression memory module 250.
For formatting module 210 for snapshot is raw data formatting, snapshot data obtains module 230 for obtaining snapshot
Data, compression memory module 250 are used to the variable quantity of the snapshot data carrying out compression storage.
The snapshot lossless compression device according to an embodiment of the present invention recalled, by the way that snapshot is raw data formatting,
And the variable quantity of snapshot data is subjected to compression storage, memory space is greatly saved.
Wherein, formatting module 210 be used to convert snapshot initial data to list, can not nested dictionary with can nested word
One of three data structures of allusion quotation.
With reference to Fig. 7, the compression memory module 250 in snapshot lossless compression device 200 that can recall further include: judging unit
252, variable quantity computing unit 254 and storage unit 256.
Judging unit 252 is used to judge whether there is the unique identification of the corresponding entity of snapshot of acquisition；Variable quantity calculates
Unit 254 be used for when exist obtain the corresponding physical entity of snapshot unique identification when, calculate the snapshot data and recently
The variable quantity of snapshot data；Storage unit 256 is used for when there is no the unique identification of the corresponding physical entity of snapshot obtained,
The snapshot data is stored as baseline snapshot and the storage variable quantity.
In other embodiments, the above-mentioned snapshot lossless compression device 200 recalled further includes backtracking module, for recalling
History predetermined point of time snapshot data.Above-mentioned backtracking module includes first acquisition unit and backtracking data capture unit.
When carrying out backtracking history predetermined point of time snapshot data, first acquisition unit acquisition baseline snapshot, and according to
Time sequencing, from baseline snapshot to all changes amount of the predetermined point of time snapshot data；Data capture unit is recalled with institute
On the basis of stating baseline snapshot, all changes amount is restored, obtains the predetermined point of time snapshot data.
In other embodiments, the snapshot lossless compression device that can be recalled further includes full dose enquiry module, is gone through for inquiring
History full dose data.Wherein, above-mentioned full dose enquiry module includes second acquisition unit and full dose query unit.
Carry out query history full dose data be when, second acquisition unit obtain baseline snapshot, and from baseline snapshot to
The all changes amount of query time point snapshot data；Full dose query unit, will be all increased on the basis of the baseline snapshot
Variable quantity restores and gives up the variable quantity of deletion, obtains the history full dose data of query time point.
The snapshot lossless compression device according to an embodiment of the present invention recalled, by the way that snapshot is raw data formatting,
And the variable quantity of snapshot data is subjected to compression storage, it may be implemented under the premise of not wasting memory space, backtracking supported to go through
The snapshot data of history any time point supports query history full dose data, saves memory space.
Those skilled in the art will also understand is that, various illustrative logical blocks, mould in conjunction with described in disclosure herein
Block, circuit and algorithm steps may be implemented as the combination of electronic hardware, computer software or both.
The flow chart and block diagram in the drawings show the possibility of the system and method for multiple embodiments according to the present invention realities
Existing architecture, function and operation.In this regard, each box in flowchart or block diagram can represent module, a journey
A part of sequence section or code, a part of the module, section or code include one or more for realizing defined
The executable instruction of logic function.It should also be noted that in some implementations as replacements, the function of being marked in box can also
To be occurred with being different from the sequence marked in attached drawing.For example, two continuous boxes can actually be basically executed in parallel,
They can also be executed in the opposite order sometimes, and this depends on the function involved.It is also noted that block diagram and/or stream
The combination of each box in journey figure and the box in block diagram and or flow chart, can the functions or operations as defined in executing
Dedicated hardware based system realize, or can realize using a combination of dedicated hardware and computer instructions.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or improvement to the technology in market for best explaining each embodiment, or make the art
Other those of ordinary skill can understand each embodiment disclosed herein.
Claims (10)
1. the snapshot lossless compression method that one kind can be recalled, which comprises the steps of:
Snapshot is raw data formatting；
Obtain snapshot data；
The variable quantity of the snapshot data is subjected to compression storage.
2. the snapshot lossless compression method according to claim 1 recalled, which is characterized in that
The step that snapshot is raw data formatting, to convert list for the snapshot initial data, can not nested word
Allusion quotation and can one of nested three kinds of data structures of dictionary.
3. the snapshot lossless compression method according to claim 1 recalled, which is characterized in that
The variable quantity by snapshot data carries out the step of compression storage, includes the following steps:
Judge whether there is the unique identification of the corresponding entity of snapshot of acquisition, if so, then calculate the snapshot data with most
The variable quantity of nearly snapshot data, and store the variable quantity；If it is not, the snapshot data is stored as baseline snapshot.
4. the snapshot lossless compression method according to claim 1 or 3 recalled, which is characterized in that further include that backtracking is gone through
The step of history predetermined point of time snapshot data, specifically comprise the following steps:
Obtain baseline snapshot；
Sequentially in time, it obtains from the baseline snapshot to all changes amount of the predetermined point of time snapshot data；
On the basis of the baseline snapshot, all changes amount is restored, obtains the predetermined point of time snapshot data.
5. the snapshot lossless compression method according to claim 1 or 3 recalled, which is characterized in that further include that inquiry is gone through
The step of history full dose data, specifically comprise the following steps:
Obtain baseline snapshot；
Obtain all changes amount of the point snapshot data from the baseline snapshot to query time；
On the basis of the baseline snapshot, all increased variable quantities are restored and are given up the variable quantity of deletion, when obtaining inquiry
Between the history full dose data put.
6. the snapshot lossless compression device that one kind can be recalled characterized by comprising
Formatting module, for snapshot is raw data formatting；
Snapshot data obtains module, for obtaining snapshot data；
Memory module is compressed, for the variable quantity of the snapshot data to be carried out compression storage.
7. the snapshot lossless compression device according to claim 6 recalled, which is characterized in that
The formatting module be used to convert the snapshot initial data to list, can not nested dictionary with can nested dictionary three
One of a data structure；
The compression memory module includes:
Judging unit, the unique identification of the corresponding entity of snapshot for judging whether there is acquisition；
Variable quantity computing unit, for calculating the snapshot number when there is the unique identification of the corresponding entity of snapshot obtained
According to the variable quantity with nearest snapshot data；
Storage unit, for when there is no the unique identification of the corresponding entity of snapshot obtained, the snapshot data to be stored
For benchmark snapshot and the storage variable quantity.
8. the snapshot lossless compression device according to claim 6 or 7 recalled, which is characterized in that further include backtracking mould
Block, for recalling history predetermined point of time snapshot data；Include:
First acquisition unit, for obtaining baseline snapshot, and sequentially in time, from baseline snapshot to the predetermined point of time
The all changes amount of snapshot data；
Recall data capture unit, on the basis of the baseline snapshot, all changes amount to be restored, obtains the pre- timing
Between put snapshot data.
Further include full dose enquiry module, is used for query history full dose data；Include:
Second acquisition unit, for obtaining baseline snapshot, and from baseline snapshot to query time point snapshot data all changes
Change amount；
Full dose query unit, for all increased variable quantities being restored and give up deletion on the basis of the baseline snapshot
Variable quantity obtains the history full dose data of query time point.
9. the snapshot lossless compression equipment that one kind can be recalled, comprising:
Processor；And
Memory is stored thereon with executable code, when the executable code is executed by the processor, makes the processing
Device executes the snapshot lossless compression method recalled as described in any one of claim 1-5.
10. a kind of non-transitory machinable medium, is stored thereon with executable code, when the executable code is counted
When calculating the processor execution of equipment, the processor is made to execute the snapshot according to any one of claims 1 to 5 recalled
Lossless compression method.
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| CN111506371A (en) * | 2020-03-10 | 2020-08-07 | 广东中鹏热能科技有限公司 | Historical data display method and system based on graph backtracking |
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Application publication date: 20190510 |