CN110187836A - A kind of data-erasure method, device, computer and storage medium - Google Patents
A kind of data-erasure method, device, computer and storage medium Download PDFInfo
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- CN110187836A CN110187836A CN201910457514.2A CN201910457514A CN110187836A CN 110187836 A CN110187836 A CN 110187836A CN 201910457514 A CN201910457514 A CN 201910457514A CN 110187836 A CN110187836 A CN 110187836A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0631—Configuration or reconfiguration of storage systems by allocating resources to storage systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0652—Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0653—Monitoring storage devices or systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
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Abstract
The embodiment of the invention provides a kind of data-erasure method, device, computer and storage mediums, wherein, data-erasure method includes: the mark expired time for obtaining the data that importance is identified as first identifier, wherein, first identifier are as follows: indicate that data are the mark of significant data, whether the acquired mark expired time of monitoring is earlier than current time, if earlier than, the importance mark of the acquired corresponding data of mark expired time is then changed to second identifier, wherein, second identifier are as follows: indicate that data are the mark of insignificant data；It selects data corresponding to second identifier to delete data as pre-, carries out data deletion for pre- data of deleting.Data deletion is carried out using scheme provided in an embodiment of the present invention, the operating process of data deletion is can simplify, improves the efficiency that data are deleted.
Description
Technical field
The present invention relates to Internet technical fields, more particularly to a kind of data-erasure method, device, computer and storage
Medium.
Background technique
With the fast development of Internet technology, more and more by the data of the Internet transmission, the server of internet
The data of middle storage are also more and more.Due to the limited storage space of server, when the overabundance of data stored in server, need
A part of data are deleted to discharge memory space, so that new data be made to can store in the server.
It in the prior art, is usually that the method used is when deleting data: by significant data of high importance and important
Property lower insignificant data be stored in different memory spaces respectively, for example, significant data and insignificant data are distinguished
It is stored in different disks or is stored in different disk partition respectively, from the memory space for storing insignificant data
Selection data are deleted, to guarantee that significant data is not deleted accidentally.
However, inventor has found in the implementation of the present invention, at least there are the following problems for the prior art: due to service
The quantity of significant data changes frequent occurrence in device, in order to make significant data have enough memory spaces, timing is needed to be deposited
Storage space is redistributed, and significant data and insignificant data are stored in the memory space redistributed again, in this way, just
It will lead to and continually memory space is redistributed, and continually data are stored again, so that data
The operating process of deletion is cumbersome, efficiency is lower.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of data-erasure method, device, computer and storage medium, with letter
Change the operating process of data deletion, improve the efficiency that data are deleted.Specific technical solution is as follows:
In a first aspect, the embodiment of the invention provides a kind of data-erasure methods, which comprises
Obtain the mark expired time that importance is identified as the data of first identifier, wherein the importance mark indicates
Whether data are significant datas, the first identifier are as follows: indicate that data are the mark of significant data；
Whether the acquired mark expired time of monitoring is earlier than current time；
If earlier than, the importance mark of the acquired corresponding data of mark expired time is changed to second identifier,
In, the second identifier are as follows: indicate that data are the mark of insignificant data；
Data corresponding to the second identifier are selected to delete data as pre-；
Data deletion is carried out for the pre- deletion data.
Optionally, before the mark expired time of the acquisition importance data that are identified as first identifier the step of,
The method also includes:
After data are downloaded, importance mark is added for the data, and identified for importance mark setting
Time phase.
Optionally, after the step of data are downloaded, the method also includes:
Store downloaded data, wherein the disk of the downloaded data of storage is correspondingly provided with mapping table, the mapping table
In include: the data stored in the disk mark, the importance of the data mark and the importance mark mark it is expired
Time；
Importance mark is added for the data described, and is the step of importance mark setting mark expired time
After rapid, this method further include:
By the mark expired time of added importance mark and importance mark, it is recorded and stores downloaded number
According to the corresponding mapping table of disk in.
Optionally, the mark expired time for obtaining importance and being identified as the data of first identifier, comprising:
Acquisition importance is identified as the nearest of the data of first identifier and is accessed time and default effective time, wherein
The accessed time recently are as follows: the time that data the last time is accessed；
By importance be identified as the data of first identifier time accessed recently and default effective time and, be determined as
Importance is identified as the mark expired time of the data of first identifier.
It is optionally, described to carry out data deletion for the pre- deletion data, comprising:
Obtain the pre- nearest accessed time for deleting data, wherein the accessed time recently are as follows: data are nearest
The once accessed time；
According to the acquired nearest accessed time, the data to be deleted of determination from the pre- deletion data, and delete
Identified data.
Second aspect, the embodiment of the invention provides a kind of data deletion apparatus, described device includes:
Time acquisition unit, the mark expired time for being identified as the data of first identifier for obtaining importance, wherein institute
State importance mark indicates whether data are significant datas, the first identifier are as follows: indicate that data are the mark of significant data；
Time supervision unit, for whether monitoring acquired mark expired time earlier than current time；
Mark modification unit, for when the monitoring result of the time supervision unit be when, by acquired mark
The importance mark of time phase corresponding data is changed to second identifier, wherein the second identifier are as follows: indicates that data are insignificant
The mark of data；
Data selection unit, for selecting data corresponding to the second identifier to delete data as pre-；
Data delete unit, for carrying out data deletion for the pre- deletion data.
Optionally, described device further include:
Data setting unit, for adding importance mark for the data, and be described important after data are downloaded
Property mark setting mark expired time.
Optionally, described device further include:
Data storage cell, for storing downloaded data, wherein the disk of the downloaded data of storage is correspondingly provided with
Mapping table, includes: the marks of the data stored in the disk, the importance of data mark in the mapping table and this is important
Property mark mark expired time；
Information recording unit, for remembering the mark expired time of added importance mark and importance mark
It records in the corresponding mapping table of disk for storing downloaded data.
Optionally, the time acquisition unit, comprising:
Time and duration obtain subelement, when being identified as data nearest of first identifier for obtaining importance and being accessed
Between and default effective time, wherein the time accessed recently are as follows: accessed time data the last time；
Mark expired time determine subelement, for importance is identified as first identifier data it is nearest be accessed when
Between with default effective time and, be determined as the mark expired time that importance is identified as the data of first identifier.
Optionally, the data delete unit, comprising:
Time obtains subelement, for obtaining the pre- nearest accessed time for deleting data, wherein the quilt recently
Access time are as follows: the time that data the last time is accessed；
Data delete subelement, for being determined from the pre- deletion data according to the acquired nearest accessed time
The data to be deleted, and delete identified data.
The third aspect, the embodiment of the invention provides a kind of computer, including processor, communication interface, memory and logical
Believe bus, wherein the processor, the communication interface, the memory complete mutual communication by the bus；Institute
Memory is stated, for storing computer program；The processor is realized for executing the program stored on the memory
Method and step described in first aspect.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, storage in the storage medium
There is computer program, step described in first aspect is realized when the computer program is executed by processor.
5th aspect, the embodiment of the invention provides a kind of computer program products comprising instruction, when it is in computer
When upper operation, so that computer executes video recommendation method described in first aspect.
Technical solution provided in an embodiment of the present invention is when deleting data, when monitoring that importance is identified as first identifier
When the mark expired time of data is earlier than current time, the importance mark of the data monitored is changed to second identifier, due to
First identifier is to indicate that data are the mark of significant data, and second identifier is to indicate that data are the mark of insignificant data, when giving
After data markers first identifier or second identifier, so that it may judge that data are significant data according to importance mark,
When the mark expired time of the corresponding data of first identifier is earlier than current time, illustrate that data are no longer significant datas,
Second identifier is changed to by first identifier at this point, identifying the importance of data, that is, data are changed to by significant data non-heavy
Data are wanted, when carrying out data deletion, carry out data deletion for data corresponding to second identifier, that is, for insignificant
Data are deleted, to guarantee that significant data is not deleted accidentally.
Technical solution provided in an embodiment of the present invention distinguishes significant data and insignificant data with importance mark, is not necessarily to
Significant data and insignificant data are respectively stored in different memory spaces, there is no need to carry out dividing again for memory space
Match, stored again without to data, so as to simplify the operating process of data deletion, improve the effect of data deletion
Rate.
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.
Fig. 1 is a kind of flow diagram of data-erasure method provided in an embodiment of the present invention；
Fig. 2 is another flow diagram of data-erasure method provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of data deletion apparatus provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of computer provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
In order to simplify the operating process of data deletion, improve the efficiency of data deletion, the embodiment of the invention provides one kind
Data-erasure method, device, computer and storage medium.
Data-erasure method is provided for the embodiments of the invention first below to be introduced.
It should be noted that data-erasure method provided by the embodiment of the present invention can be applied to Internet technology row
Industry.For example, sound, video website or application, literature query website or application etc..Data-erasure method provided in an embodiment of the present invention
Executing subject can be computer, which can be desktop computer, portable computer, intelligent mobile terminal, clothes
Business device etc., specifically for example, the executing subject of data-erasure method provided in an embodiment of the present invention can be content distributing network
(Content Delivery Network, abbreviation CDN) cache server.
In one embodiment, the application scenarios of technical solution provided in an embodiment of the present invention may is that data management
Platform is after generating new data and new data is synchronized storage to video CD N cache server, video CD N cache server pair
The method that its data stored is deleted.
As shown in Figure 1, data-erasure method provided by the embodiment of the present invention the following steps are included:
S110: the mark expired time that importance is identified as the data of first identifier is obtained, wherein importance mark indicates
Whether data are significant data, first identifier are as follows: indicate that data are the mark of significant data.
In embodiments of the present invention, the data that computer is downloaded can be when carrying importance mark and identifying expired
Between data, at this point, computer locally be just stored with data importance mark and mark expired time, computer can from this
The mark expired time that importance is identified as the data of first identifier is obtained in ground storage.
Above-mentioned importance mark can be the mark indicated with numerical value, at this point, first identifier can be numerical value, for example, the
One is identified as the numerical value such as " 1 ", " 0 ", " 2 ".Above-mentioned importance mark can be the mark indicated with letter, at this point, first identifier
Can be alphabetical, for example, first identifier is the letters such as " a ", " b ".The concrete form present invention of importance mark and first identifier is real
Example is applied not limit specifically.
The corresponding data of hot topic have the corresponding video data of the video of using names quotient etc., may be identified as being weight
Data are wanted, after adding first identifier to these data, so that it may separate these data and insignificant data field.
In embodiments of the present invention, computer can be identified as first identifier by following any mode to obtain importance
Data mark expired time:
The mark expired time that importance is identified as the data of first identifier is obtained by the first prefixed time interval；Wherein,
First prefixed time interval can be determined according to the storage condition etc. of the renewal speed of data, computer, for example, when data
When renewal speed is very fast, the first prefixed time interval can be set to short period of time, when computer storage occupancy compared with
Gao Shi, the first prefixed time interval can be set to short period of time.For example, the first prefixed time interval can be 30 points
Clock, 1 hour, 1 day constant duration, the embodiment of the present invention do not limit specifically.
After reaching specific time, importance is identified as the mark expired time of the data of first identifier；Specific time example
It such as can be daily fixed time, for example, daily 12:00 and 01:00, are also possible to fixed time weekly, for example, often
Sunday 01:00, those skilled in the art can specific time determines according to actual conditions the specific time, the embodiment of the present invention is not
It is specific to limit.
Between when received after acquisition instruction, the mark expired time that importance is identified as the data of first identifier is obtained；
Wherein, time acquisition instruction can be instruction that operator inputs in computer, being received by computer, and time acquisition refers to
It enables and is also possible to instruction that computer receives, sending from other equipment, the embodiment of the present invention does not limit specifically.
After monitoring that storage occupancy reaches preset ratio, the mark that importance is identified as the data of first identifier is obtained
Expired time；Preset ratio for example can be any value in 3/5~4/5, be also possible to other values for being not more than 1.
The mark expired time that importance is identified as the data of first identifier is obtained in real time.
S120: whether acquired mark expired time is monitored earlier than current time.
S130: if the monitoring result of step S120 be it is yes, by the weight of the acquired corresponding data of mark expired time
The property wanted mark is changed to second identifier, wherein second identifier are as follows: indicates that data are the mark of insignificant data.
Above-mentioned second identifier are as follows: the mark different from above-mentioned first identifier.For example, being indicated when importance is identified as with numerical value
Mark, first identifier be " 1 " when, second identifier can be the numerical value such as " 0 ", " 2 ", " 3 ", or other numerical value.When upper
It states importance and is identified as the mark indicated with letter, when first identifier is " a ", second identifier can be the words such as " b ", " c ", " d "
It is female.First identifier and second identifier can also respectively with various forms of symbol logos, for example, first identifier is indicated with numerical value,
Second identifier is indicated with letter.In embodiments of the present invention, first identifier is different from second identifier, the tool of importance mark
The body form embodiment of the present invention does not limit specifically.
S140: data corresponding to second identifier are selected to delete data as pre-.
S150: data deletion is carried out for pre- data of deleting.
Data deletion is carried out for pre- data of deleting, i.e., when carrying out data deletion, deletion is in pre- deletion data
Data.In embodiments of the present invention, computer can select data to be deleted from pre- delete in data, in this way, can make institute
The data of deletion are more targeted.
Data-erasure method provided in an embodiment of the present invention is when deleting data, since first identifier is to indicate that data are attached most importance to
Want the mark of data, second identifier is to indicate that data are the mark of insignificant data, when to data markers first identifier or the
After two marks, so that it may judge that data are significant data according to importance mark, when monitoring that importance is identified as the
When the mark expired time of the data of one mark is earlier than current time, illustrate that data are no longer significant datas, at this point, will count
According to importance identify second identifier be changed to by first identifier, that is, data are changed to insignificant data by significant data,
When carrying out data deletion, data deletion is carried out for data corresponding to second identifier, that is, carry out for insignificant data
It deletes, to guarantee that significant data is not deleted accidentally.Technical solution provided in an embodiment of the present invention is distinguished with importance mark
Significant data and insignificant data, it is not necessary that significant data and insignificant data are respectively stored in different memory spaces, therefore
It without carrying out redistributing for memory space, is stored again without to data, so as to simplify the behaviour that data are deleted
Make process, improve the efficiency that data are deleted.
In one embodiment, as shown in Fig. 2, before step S110, the above method can also include the following steps
S160:
S160: after data are downloaded, importance mark is added for the data, and identified for importance mark setting
Time phase.
When the data that computer is downloaded are not carry the data of importance mark and mark expired time, or calculate
When the mark of importance entrained by the data that machine is downloaded and mark expired time do not meet preset requirement, computer can be in number
After being downloaded, importance mark is added for the data, and be importance mark setting mark expired time.In this way, can
So that computer successfully gets the importance mark of data and the mark expired time of data.
In one embodiment, as shown in Fig. 2, after the step of data are downloaded in step S160, the above method
It can also include the following steps S170:
S170: the downloaded data of storage, wherein the disk of the downloaded data of storage is correspondingly provided with mapping table, maps
It include: the mark of the marks of the data stored in the disk, the importance of data mark and importance mark in table
Time phase；
After step S160, the further comprising the steps of S180 of the above method:
S180: the mark expired time of added importance mark and importance mark is recorded under storage institute
In the corresponding mapping table of the disk of the data of load.
In the present embodiment, the data downloaded can be stored in disk by computer.The mark of above-mentioned data can
To be the unique identifier of data, the mark of data for example be can be " 121b60c99a446f7.f4v ", and the mark of data can also
To be other for marking and identifying the mark of data.
In the present embodiment, specifically can by the mark of the data stored, for weight added by the data that are stored
The mark expired time of the importance mark for the data that the property wanted is identified and stored, is recorded the magnetic for storing downloaded data
In the corresponding mapping table of disk.
In present embodiment, when the disk that the importance mark of data is recorded to the storage data with mark expired time
After in corresponding mapping table, data can be inquired and deleted by mapping table, in this way, data can be inquired more quickly,
The efficiency that data are deleted is improved, and the scope of application and scalability of the data-erasure method of the embodiment of the present invention can be improved.
In embodiments of the present invention, can for each mapping table distribute a thread, thread be used to execute data modification,
The operations such as insertion, inquiry, deletion.A thread is individually distributed for each mapping table, it is possible to reduce multiple threads operate simultaneously to be reflected
The phenomenon that firing table, thus the phenomenon that mapping table outage probability increases caused by reducing because of frequent operation mapping table.In the present invention
In embodiment, a message queue can also be arranged for per thread can be by this multiple operation when there is multiple operation tasks
Task is put into message queue, and thread successively extracts and execute each operation task from message queue, to reduce multiple behaviour
As task be performed simultaneously caused by mapping table outage probability increase the phenomenon that.For example, if a certain in the mapping table of disk reflect
For the expired time that the relationship of penetrating includes earlier than current time, the importance for including in the mapping relations is identified as first identifier, then counts
Calculation machine can correspond to the one modification task of message queue insertion of thread to the disk, and the importance for including by the mapping relations identifies
It is revised as second identifier.
In one embodiment, step S110 can be realized with S111~S112 according to the following steps:
S111: acquisition importance is identified as the nearest of the data of first identifier and is accessed time and default effective time,
Wherein, the accessed time recently are as follows: the time that data the last time is accessed；
S112: by importance be identified as the data of first identifier time accessed recently and default effective time and,
It is determined as the mark expired time that importance is identified as the data of first identifier.
The default effective time of accessed time and data recently that can store data in computer, works as computer
In be stored with data time accessed recently and data default effective time when, computer can obtain data from local
Time accessed recently and data default effective time.Specifically, can store the attribute letter of data in computer
It ceases, may include the default effective time of data in the attribute information, is accessed the time recently, can also include in attribute information
The other information of data, such as the store path of data.Computer can be from the local attribute information for obtaining data, and from acquisition
Attribute information in extract time accessed recently and the effective time of data of data.
When data are accessed in away from nearest accessed time certain time, illustrate that there are also user is emerging to the data sense
Interest illustrates have user to the number very well when data are not visited in away from nearest accessed time certain time
According to interested, present embodiment is dynamically determined the expired time of data according to the default effective time of data, can make institute
Determining expired time more meets the actual access demand of user, so that the data deleted be made also more to meet the actual access of user
Demand.
In one embodiment, step S150 can be realized with S151~S152 according to the following steps:
S151: the pre- nearest accessed time for deleting data is obtained, wherein the accessed time recently are as follows: data nearest one
The secondary accessed time.
Computer locally can store the nearest accessed time of each data, when each data are locally stored in computer
Recently when the accessed time, computer can obtain the pre- nearest accessed time for deleting data from local.
S152: according to the acquired nearest accessed time, the data to be deleted of determination in data are deleted from pre-, and delete
Identified data.
In a specific embodiment, step S152 can be realized according to the following steps: be determined most from pre- delete in data
The time interval of nearly accessed time interval current time is greater than the data of the second prefixed time interval, and deletes identified number
According to.Second prefixed time interval can determine according to the storage condition etc. of the renewal speed of data, computer, can also basis
Other actual conditions determine that, when the renewal speed of data is very fast, the second prefixed time interval can be set to the short period
Interval, when the occupancy of computer storage is higher, the second prefixed time interval can be set to short period of time.For example,
Second prefixed time interval can be any time interval in 1 day~10 days, be also possible to other times interval, and the present invention is real
Example is applied not limit specifically.
When the time interval of the time interval current time accessed recently of data is greater than the second prefixed time interval, explanation
The time that data the last time is accessed is more early, i.e., data are not visited within away from the current time long period, at this point, saying
Bright data are not interested or when having been subjected to by user, delete these data to discharge the memory space of computer, can be with
Data when those have been subjected to more accurately are deleted, influence of the data deletion to user is reduced.
In another embodiment specific implementation mode, step S152 can also be realized according to the following steps: according to each pre- deletion data
The nearest accessed sequence of time from morning to night, successively select preset quantity data from each pre- deletion data, and delete
The preset quantity data of selection.The occurrence of preset quantity can update demand store to computer, calculating according to data
The actual conditions such as size, the storage occupancy situation of computer, the input/output pressure of computer storage of the data stored in machine
To determine.For example, preset quantity can be set to the larger value, work as meter when the demand that data update stores computer is larger
When the data stored in calculation machine take up space smaller, preset quantity can be set to the larger value.Those skilled in the art can root
The occurrence of preset quantity is set according to actual conditions, and the embodiment of the present invention does not limit specifically.Most according to each pre- deletion data
It is accessed the sequence of time from morning to night closely to delete data, the data deleted can be made more to be consistent with the preference of user, in this way
Data when can more accurately delete the uninterested data of user or have been subjected to retain the interested data of user.
Nearest due to data is accessed the time can reflect out when whether data have been subjected to or whether data are to user
Also attractive, present embodiment deletes data according to the nearest accessed time of data, can make the data and use deleted
The preference at family is more consistent, so as to more targetedly carry out the deletion of data.
In one embodiment, step S110 may comprise steps of:
Judge that importance is identified as the data of first identifier and whether is accessed；
If so, acquisition importance is identified as the nearest interviewed of the data of first identifier from the accessed time of record
Ask the time；
If not, the time that the data that importance is identified as first identifier are downloaded, which is determined as importance, is identified as first
The nearest accessed time of the data of mark.
When the executing subject of data-erasure method provided in an embodiment of the present invention is CDN cache server, above-mentioned data
The time being downloaded can be with are as follows: the time that data are downloaded from global storage, wherein the overall situation is stored as the source clothes that data are stored
Business device.
After data are downloaded to computer, it can may just be accessed by the user, be downloaded in data after a period of time
It not will record the accessed time of data after computer, before being accessed by the user, in computer, it in this case, can be by number
It is determined as the nearest accessed time of data according to the time for being downloaded to computer, to keep computer available to each number
According to the nearest accessed time.
Corresponding with above-mentioned data-erasure method, the embodiment of the invention also provides a kind of data deletion apparatus, such as Fig. 3 institute
Show, which includes:
Time acquisition unit 310, the mark expired time for being identified as the data of first identifier for obtaining importance,
In, the importance mark indicates whether data are significant datas, the first identifier are as follows: indicates that data are the mark of significant data
Know；
Time supervision unit 320, for whether monitoring acquired mark expired time earlier than current time；
Mark modification unit 330, for when the monitoring result of the time supervision unit be when, by acquired mark
The importance mark of the corresponding data of expired time is changed to second identifier, wherein the second identifier are as follows: indicates that data are non-heavy
Want the mark of data；
Data selection unit 340, for selecting data corresponding to the second identifier to delete data as pre-；
Data delete unit 350, for carrying out data deletion for the pre- deletion data.
Data deletion apparatus provided in an embodiment of the present invention distinguishes significant data and insignificant data with importance mark,
It is not necessary that significant data and insignificant data are respectively stored in different memory spaces, there is no need to carry out memory space again
Distribution, is stored again without to data, so as to simplify the operating process of data deletion, improve the effect of data deletion
Rate.
In one embodiment, described device can also include:
Data setting unit, for adding importance mark for the data, and be described important after data are downloaded
Property mark setting mark expired time.
In one embodiment, described device can also include:
Data storage cell, for storing downloaded data, wherein the disk of the downloaded data of storage is correspondingly provided with
Mapping table, includes: the marks of the data stored in the disk, the importance of data mark in the mapping table and this is important
Property mark mark expired time；
Information recording unit, for remembering the mark expired time of added importance mark and importance mark
It records in the corresponding mapping table of disk for storing downloaded data.
In one embodiment, the time acquisition unit 310 may include:
Time and duration obtain subelement, when being identified as data nearest of first identifier for obtaining importance and being accessed
Between and default effective time, wherein the time accessed recently are as follows: accessed time data the last time；
Mark expired time determine subelement, for importance is identified as first identifier data it is nearest be accessed when
Between with default effective time and, be determined as the mark expired time that importance is identified as the data of first identifier.
In one embodiment, the data delete unit 350, may include:
Time obtains subelement, for obtaining the pre- nearest accessed time for deleting data, wherein the quilt recently
Access time are as follows: the time that data the last time is accessed；
Data delete subelement, for being determined from the pre- deletion data according to the acquired nearest accessed time
The data to be deleted, and delete identified data.
The embodiment of the invention also provides a kind of computers, as shown in figure 4, including processor 401, communication interface 402, depositing
Reservoir 403 and communication bus 404, wherein processor 401, communication interface 402, memory 403 are completed by communication bus 404
Mutual communication,
Memory 403, for storing computer program；
Processor 401 when for executing the program stored on memory 403, realizes following steps:
Obtain the mark expired time that importance is identified as the data of first identifier, wherein the importance mark indicates
Whether data are significant datas, the first identifier are as follows: indicate that data are the mark of significant data；
Whether the acquired mark expired time of monitoring is earlier than current time；
If earlier than, the importance mark of the acquired corresponding data of mark expired time is changed to second identifier,
In, the second identifier are as follows: indicate that data are the mark of insignificant data；
Data corresponding to the second identifier are selected to delete data as pre-；
Data deletion is carried out for the pre- deletion data.
Computer provided in an embodiment of the present invention is distinguished significant data and insignificant data with importance mark, is not necessarily to
Significant data and insignificant data are respectively stored in different memory spaces, there is no need to carry out dividing again for memory space
Match, stored again without to data, so as to simplify the operating process of data deletion, improve the effect of data deletion
Rate.
The communication bus that above-mentioned computer is mentioned can be Peripheral Component Interconnect standard (Peripheral Component
Interconnect, PCI) bus or expanding the industrial standard structure (Extended Industry Standard
Architecture, EISA) bus etc..The communication bus can be divided into address bus, data/address bus, control bus etc..For just
It is only indicated with a thick line in expression, figure, it is not intended that an only bus or a type of bus.
Communication interface is for the communication between above-mentioned server and other equipment.
Memory may include random access memory (Random Access Memory, RAM), also may include non-easy
The property lost memory (Non-Volatile Memory, NVM), for example, at least a magnetic disk storage.Optionally, memory may be used also
To be storage device that at least one is located remotely from aforementioned processor.
Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit,
CPU), network processing unit (Network Processor, NP) etc.；It can also be digital signal processor (Digital Signal
Processing, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
It is field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components.
In another embodiment provided by the invention, a kind of computer readable storage medium is additionally provided, which can
It reads to be stored with instruction in storage medium, when run on a computer, so that computer executes any institute in above-described embodiment
The data-erasure method stated.
In another embodiment provided by the invention, a kind of computer program product comprising instruction is additionally provided, when it
When running on computers, so that computer executes any data-erasure method in above-described embodiment.
For device/computer/storage medium/program product embodiment, implement since it is substantially similar to method
Example, so being described relatively simple, the relevent part can refer to the partial explaination of embodiments of method.
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 a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device/
For computer/storage medium embodiment, since it is substantially similar to the method embodiment, so be described relatively simple, it is related
Place illustrates referring to the part of embodiment of the method.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (12)
1. a kind of data-erasure method, which is characterized in that the described method includes:
Obtain the mark expired time that importance is identified as the data of first identifier, wherein the importance mark indicates data
It whether is significant data, the first identifier are as follows: indicate that data are the mark of significant data；
Whether the acquired mark expired time of monitoring is earlier than current time；
If earlier than the importance mark of the acquired corresponding data of mark expired time second identifier is changed to, wherein institute
State second identifier are as follows: indicate that data are the mark of insignificant data；
Data corresponding to the second identifier are selected to delete data as pre-；
Data deletion is carried out for the pre- deletion data.
2. the method according to claim 1, wherein being identified as the data of first identifier in the acquisition importance
Mark expired time the step of before, the method also includes:
After data are downloaded, when being identified for data addition importance, and identifying expired for importance mark setting
Between.
3. according to the method described in claim 2, it is characterized in that, after the step of data are downloaded, the method
Further include:
Store downloaded data, wherein the disk of the downloaded data of storage is correspondingly provided with mapping table, wraps in the mapping table
It includes: the mark expired time that mark, the importance of data mark and importance of the data stored in the disk identify；
It is described for the data add importance mark, and for the importance mark setting mark expired time the step of it
Afterwards, the method also includes:
By the mark expired time of added importance mark and importance mark, it is recorded and stores downloaded data
In the corresponding mapping table of disk.
4. the method according to claim 1, wherein the acquisition importance is identified as the data of first identifier
Identify expired time, comprising:
Acquisition importance is identified as the nearest of the data of first identifier and is accessed time and default effective time, wherein described
The accessed time recently are as follows: the time that data the last time is accessed；
By importance be identified as the data of first identifier time accessed recently and default effective time and, be determined as important
Property is identified as the mark expired time of the data of first identifier.
5. method according to claim 1 to 4, which is characterized in that described to carry out data for the pre- deletion data
It deletes, comprising:
Obtain the pre- nearest accessed time for deleting data, wherein the accessed time recently are as follows: data are the last
The accessed time；
According to the acquired nearest accessed time, the data to be deleted of determination from pre- the deletions data, and delete it is true
Fixed data.
6. a kind of data deletion apparatus, which is characterized in that described device includes:
Time acquisition unit, the mark expired time for being identified as the data of first identifier for obtaining importance, wherein described heavy
The property wanted mark indicates whether data are significant datas, the first identifier are as follows: indicates that data are the mark of significant data；
Time supervision unit, for whether monitoring acquired mark expired time earlier than current time；
Mark modification unit, for when the monitoring result of the time supervision unit, which is, is, when acquired mark is expired
Between corresponding data importance mark be changed to second identifier, wherein the second identifier are as follows: expressions data be insignificant data
Mark；
Data selection unit, for selecting data corresponding to the second identifier to delete data as pre-；
Data delete unit, for carrying out data deletion for the pre- deletion data.
7. device according to claim 6, which is characterized in that described device further include:
Data setting unit, for adding importance mark for the data, and be the importance mark after data are downloaded
Know setting mark expired time.
8. device according to claim 7, which is characterized in that described device further include:
Data storage cell, for storing downloaded data, wherein the disk of the downloaded data of storage is correspondingly provided with mapping
Table includes: the mark, the importance of data mark and the importance mark of the data stored in the disk in the mapping table
The mark expired time of knowledge；
Information recording unit, for being recorded the mark expired time of added importance mark and importance mark
In the corresponding mapping table of disk for storing downloaded data.
9. device according to claim 6, which is characterized in that the time acquisition unit, comprising:
Time and duration obtain subelement, for obtain importance be identified as first identifier data it is nearest be accessed the time with
And default effective time, wherein the accessed time recently are as follows: the time that data the last time is accessed；
Mark expired time determines subelement, for importance is identified as the data of first identifier the nearest accessed time and
The sum of default effective time, is determined as the mark expired time that importance is identified as the data of first identifier.
10. according to any device of claim 6-9, which is characterized in that the data delete unit, comprising:
Time obtains subelement, for obtaining the pre- nearest accessed time for deleting data, wherein described accessed recently
Time are as follows: the time that data the last time is accessed；
Data delete subelement, for according to the acquired nearest accessed time, determination will to be deleted from the pre- deletion data
The data removed, and delete identified data.
11. a kind of computer, which is characterized in that including processor, communication interface, memory and communication bus, wherein the place
Reason device, the communication interface, the memory complete mutual communication by the bus；
The memory, for storing computer program；
The processor realizes any method of claim 1-5 for executing the program stored on the memory
Step.
12. a kind of computer readable storage medium, which is characterized in that computer program is stored in the storage medium, it is described
Claim 1-5 any method and step is realized when computer program is executed by processor.
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