CN101996291B - Data manipulation method and device - Google Patents
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- CN101996291B CN101996291B CN2010105294889A CN201010529488A CN101996291B CN 101996291 B CN101996291 B CN 101996291B CN 2010105294889 A CN2010105294889 A CN 2010105294889A CN 201010529488 A CN201010529488 A CN 201010529488A CN 101996291 B CN101996291 B CN 101996291B
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Abstract
The embodiment of the invention discloses a data manipulation method and a data manipulation device and relates to the field of data processing. For improving the operation efficiency of data manipulation, the invention adopts a technical scheme that the method comprises the following steps: receiving a data manipulation instruction of a user; according to the data manipulation instruction of the user, querying a commonly used list stored in a memory to see if a target authority record exists, wherein the target authority record corresponds to the data manipulation instruction; when it is determined that the target authority record exists in the commonly used list stored in the memory, acquiring the target authority record from the commonly used list; and performing corresponding data manipulation according to the target authority record and the data manipulation instruction.
Description
Technical field
The present invention relates to data processing field, relate in particular to a kind of data manipulation method and device.
Background technology
Along with the development of smart card technological level, the processing power of smart card constantly strengthens, so that smart card can be stored increasing data message.Yet, because of the resource-constraineds such as memory headroom, cpu frequency and channel transfer speed of smart card, in smart card, introduce a data management platform, it can utilize the limited resources on the smart card, and the Various types of data of managing flexibly, efficiently on the smart card is used.
During for the data in usage data management platform management smart card, guarantee security and the operation validity of these data, at present, before data are operated, from the permissions list of storage, read relevant authority records, according to the operation of this authority records control user to data.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: because permissions list is stored among the NandFlash (non-volatile flash memory), therefore, permissions list is operated at every turn and all will carry out I/O (Input/Output, I/O) operation.Like this, when the multi-pass operations data, can carry out IO operation repeatedly, cause the operational efficiency of data manipulation lower.
Summary of the invention
Embodiments of the invention provide a kind of data manipulation method and device, can improve the operational efficiency of data manipulation.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of data manipulation method of smart card comprises:
Receive user's data manipulation instruction;
According to described user's data manipulation instruction, whether there is the target authority records in the common list of inquiry smart card memory storage, described target authority records is the authority records corresponding with described data manipulation instruction;
When in determining described common list, having the target authority records, from described common list, obtain described target authority records;
When in determining described common list, not having the target authority records, from the permissions list of smart card flash memory storage, obtain described target authority records, and described target authority records is inserted in the described common list;
Carry out corresponding data manipulation according to described target authority records and described data manipulation instruction.
A kind of smart card comprises:
The command reception unit is for the data manipulation instruction that receives the user;
The target record judging unit is used for judging whether the common list of smart card memory storage exists the target authority records, and described target authority records is the authority records corresponding with the data manipulation instruction of described command reception unit reception;
First row table record acquiring unit is used for obtaining described target authority records from described common list when described target record judging unit judges that there is the target authority records in described common list;
Secondary series table record acquiring unit is used for obtaining described target authority records from the permissions list of smart card flash memory storage when described target record judging unit judges that there is not the target authority records in described common list;
First row table record plug-in unit is used for the target authority records that described list records acquiring unit obtains is inserted described common list;
Operating unit is used for carrying out corresponding data manipulation according to target authority records and described data manipulation instruction that described first row table record acquiring unit or described secondary series table record acquiring unit obtain.
The data manipulation method that the embodiment of the invention provides and device, by when search access right records, from internal memory, read the target authority records when in internal memory, having the target authority records, if there is not the target authority records from flash memory, to read again the target authority records in the internal memory, and this target authority records is stored in the internal memory, when again reading this target authority records, will from internal memory, read.Like this, just the frequent authority records of using of a part can be stored in the internal memory for fast access temporarily, all to access flash memory during the query aim authority records at every turn, thereby reduce the number of times of IO operation when data manipulation, improve the operational efficiency of data manipulation.And, not needing the extra new hardware device that increases, can effectively control cost.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use was done a simply introduction during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of a kind of data manipulation method that Fig. 1 provides for the embodiment of the invention;
The schematic flow sheet of a kind of authority giving method that Fig. 2 provides for the embodiment of the invention;
The schematic flow sheet of a kind of authority sweep-out method that Fig. 3 provides for the embodiment of the invention;
The schematic flow sheet of the another kind of data manipulation method that Fig. 4 provides for the embodiment of the invention;
The formation synoptic diagram of a kind of data manipulation device that Fig. 5 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In order to improve the operational efficiency of data manipulation, the embodiment of the invention provides a kind of data manipulation method, as shown in Figure 1, comprising:
101, receive user's data manipulation instruction;
Wherein, described data manipulation instruction can be for instruction, the instruction of revising certain data of reading certain data, insert the instruction of certain data and remove instruction of certain data etc.
For example, smart card can obtain according to this data manipulation instruction operation user's user ID behind the data manipulation instruction that receives the user, as the data of operand, and the information such as the mode of operation of data (such as insertion or deletion etc.).And, according to operation user's user ID, as the data of operand, search corresponding authority records in the common list of the information such as the mode of operation of data from be stored in internal memory.
102, according to described user's data manipulation instruction, whether have the target authority records in the common list of audit memory storage, described target authority records is the authority records corresponding with described data manipulation instruction;
When 103, in determining described common list, having the target authority records, from described common list, obtain described target authority records;
For example, if smart card finds corresponding authority records in common list, namely the target authority records then reads this target authority records from common list.Wherein, this target authority records comprises the fields such as user ID, object data, mode of operation, authority setting.
In addition, when in the common list of determining memory, not having the target authority records, from the permissions list of flash memory storage, obtain described target authority records, and described target authority records is inserted in the described common list;
For example, if smart card does not find the target authority records in common list, then search this target authority records in the permissions list from be stored in flash memory.If in permissions list, find this target authority records, just this target authority records is inserted in the common list.
When the target authority records is inserted common list, need to judge whether be filled with authority records in the common list.If be not filled with authority records in the judgement common list, then directly the target authority records is inserted in the common list.If be filled with authority records in the judgement common list, then determine to be replaced authority records according to pre-defined rule, will be replaced authority records and replace to the target authority records.For example, if common list is according to FIFO (First Input First Output, first in first out) mode is stored authority records, then the last item authority records in the common list is defined as being replaced authority records, replaces this last item authority records with the target authority records.
In addition, be replaced in order to prevent the authority records of frequently being used, can lock setting to this authority records of frequently being used.Determine an authority records of the first record to be replaced according to pre-defined algorithm after, with it as the first record record to be replaced.For example.Make record record to be replaced according to the authority records that deposits in the earliest in the pre-configured tabulation that defines the competence.Check whether this first record to be replaced is locked.If the first record to be replaced is not locked, then the first record to be replaced is and is replaced authority records, is replaced by the target authority records.If the first record to be replaced is locked, then continue definite authority records in the remaining authority records except this authority records from common list according to pre-defined algorithm, with it as the second record record to be replaced.And check the authority records of again determining, namely whether the second record record to be replaced is locked.If the second record record to be replaced is locked, then proceeds the definite of authority records and lock the operation of checking.If authority records is all locked in the common list, then the authority records with assigned position is defined as being replaced authority records.Wherein, this assigned position can by operating personnel before carrying out data manipulation, set in advance or this operation in send the instruction setting, also can when dispatching from the factory, set in advance.
For example, the last item authority records in the common list can frequently be used, and the user is this authority records mark locking sign in order to prevent this authority records to be replaced.When needs insert common list with the target authority records, and judge when being filled with authority records in the common list, find the last item authority records according to the FIFO principle, it is locked that the locking sign that marks according to this authority records is judged this authority records, then continue to search second from the bottom, and lock judgement.But, if the authority records in the current common list is all locked, then with the last item authority records in the common list as being replaced authority records, it is replaced to the target authority records.
104, carry out corresponding data manipulation according to described target authority records and described data manipulation instruction.
For example, when user's data manipulation instruction is when reading the instruction of certain data, if the target authority records that finds record active user has the authority that reads these data, then carry out the read operation of these data, if target authority records record active user does not read the authority of these data, then prompting user does not possess the authority that reads these data.
In addition, in the present embodiment, carry out the correlation step of authority when authorizing, as shown in Figure 2, comprising:
201, the authority that receives the user is authorized instruction;
For example, smart card receives user's authority and authorizes instruction, and this authority is authorized and comprised operand data, mode of operation, the authority records information such as corresponding authority in the instruction.
202, authorize instruction according to described authority and obtain authority records;
For example, smart card is authorized from described authority and is obtained authority records information the instruction, and, obtain active user's user ID.Obtain authority records according to the user ID of obtaining and authority records information.
When 203, in determining described permissions list, not having the authority records of obtaining, the authority records of obtaining is inserted in the permissions list;
For example, smart card is searched this authority records in permissions list, when searching less than this authority records, this authority records is inserted in the permissions list.
204, empty authority records in the common list.
For example, after this authority records is successfully inserted permissions list, empty authority records whole in the common list, thereby the authority records in the assurance common list and the authority records in the permissions list are consistent, and avoid using authority records old in the common list that the user is carried out authentication.
In addition, in the present embodiment, the correlation step when carrying out the authority removing as shown in Figure 3, comprising:
301, receive user's authority clear instruction;
For example, smart card receives user's authority clear instruction, obtains the key assignments information of the authority records that need to be eliminated from this authority clear instruction.
When 302, in described permissions list, not having the authority records corresponding with described authority clear instruction, from described permissions list, remove described authority records;
For example, smart card, is removed this authority records when finding this authority records according to the authority records that these needs of key assignments information searching that obtain are eliminated from permissions list.
303, empty authority records in the common list.
For example, after from permissions list, successfully removing this authority records, empty authority records whole in the common list, thereby the authority records in the assurance common list and the authority records in the permissions list are consistent, and avoid using authority records old in the common list that the user is carried out authentication.Particularly, for example, the authority records 1 that user A is all arranged in permissions list and the common list, add the permissions list 2 of user A this moment in the permissions list, if do not empty common list, find the authority records 1 of user A during the inquiry common list, the authentication that only carry out according to 1 couple of user A of this authority records this moment.Therefore, need to empty the authority records in the common list, add up-to-date record in common list, the authority records in the assurance common list and the authority records in the permissions list are consistent.
The data manipulation method that present embodiment provides, by when search access right records, from internal memory, read the target authority records when in internal memory, having the target authority records, if there is not the target authority records from flash memory, to read again the target authority records in the internal memory, and this target authority records is stored in the internal memory, when again reading this target authority records, will from internal memory, read.Like this, just the frequent authority records of using of a part can be stored in the internal memory for fast access temporarily, all to access flash memory during the query aim authority records at every turn, thereby reduce the number of times of IO operation when data manipulation, improve the operational efficiency of data manipulation.
Suppose to have a database, comprise a tables of data Table1 who contains many records, the literary name section comprises the fields such as name, sex, age, address, floor space, house type, annual family income.Currently three user A, B and C that can use this database have been created, user A is super administrator, it has whole authorities of data manipulation, and user B and C are domestic consumer, user B is allowed to read the whole fields except field " annual family income ", and user C is allowed to read whole fields.The authority records that records respectively these three users is stored in the permissions list among the Nandflash.Below, in conjunction with the scene of user B data query embodiment of the invention data manipulation method is described in further detail.
As shown in Figure 4, the present embodiment data manipulation method comprises:
401, user B log database, user B inputs take the address as the Wangfujing Dajie as the query manipulation instruction of querying condition.
402, smart card is made the authority judgement to current login user, and the authority records in the common list of inspection memory determines not exist the operating right record about each field of user B his-and-hers watches Table1.
403, the permissions list among the smart card access Nandflash reads this authority records from this permissions list, and this authority records is inserted in the common list.
404, because the content of this authority records is allowed to read whole fields except field " annual family income " for user B, smart card judges that according to the content of this authority records user B can carry out above-mentioned query manipulation, meets the Query Result that the address is the querying condition of Wangfujing Dajie to user B output.
405, user B inputs take the address as street, Xizhimen as the query manipulation instruction of querying condition.
406, the authority records in the common list of smart card inspection memory determines to exist the operating right record about each field of user B his-and-hers watches Table1, reads this authority records from common list.
407, because the content of this authority records is allowed to read whole fields except field " annual family income " for user B, smart card judges that according to the content of this authority records user B can carry out above-mentioned query manipulation, meets the Query Result that the address is the querying condition in street, Xizhimen to user B output.
In addition, in order to guarantee the correctness of common list information, when user B published database, smart card was removed the authority records in the common list.When user C log database, with reference to aforesaid way the authority of data operation is verified.
The data manipulation method that present embodiment provides, by when search access right records, from internal memory, read the target authority records when in internal memory, having the target authority records, if there is not the target authority records from flash memory, to read again the target authority records in the internal memory, and this target authority records is stored in the internal memory, when again reading this target authority records, will from internal memory, read.Like this, just the frequent authority records of using of a part can be stored in the internal memory for fast access temporarily, all to access flash memory during the query aim authority records at every turn, thereby reduce the number of times of IO operation when data manipulation, improve the operational efficiency of data manipulation.And, not needing the extra new hardware device that increases, can effectively control cost.
With said method accordingly, the embodiment of the invention also provides a kind of data manipulation device, as shown in Figure 5, comprising:
Target record judging unit 502 is used for judging whether the common list of memory exists the target authority records, and described target authority records is the authority records corresponding with the data manipulation instruction of described command reception unit 501 receptions;
First row table record acquiring unit 503 is used for obtaining described target authority records from described common list when described target record judging unit 502 judges that there is the target authority records in described common list;
Secondary series table record acquiring unit 504 is used for obtaining described target authority records from the permissions list of flash memory storage when described target record judging unit 502 judges that there is not the target authority records in described common list;
First row table record plug-in unit 505 is used for the target authority records that described list records acquiring unit 504 obtains is inserted described common list;
Further, described secondary series table record acquiring unit 503, concrete being used for obtained described target authority records from described permissions list when there is described target authority records in the permissions list of determining flash memory storage.
Further, described first row table record plug-in unit 505 specifically comprises:
The record judgment sub-unit is used for judging whether described common list has been filled with authority records;
Record intron unit is used for when described record judgment sub-unit judges that described common list is not filled with authority records described target authority records being inserted in the described common list;
Subelement determined in record, is used for determining to be replaced authority records according to pre-defined rule when described record judgment sub-unit judges that described common list has been filled with authority records;
Subelement replaced in record, is used for described target authority records is replaced the authority records that is replaced that described record determines that subelement determines.
Further, described record determines that subelement specifically comprises:
The record determination module is used for determining an authority records according to pre-defined algorithm at described common list; Perhaps, when the record judge module judges that the definite authority records of described record determination module is locked, according to determining an authority records in the remaining authority records of pre-defined algorithm in described common list;
The record judge module is used for judging whether the definite authority records of described record determination module is locked;
Replace the record determination module, be used for when described record judge module judges that the definite authority records of described record determination module is not locked, determine that the definite authority records of described record determination module is for being replaced authority records; Perhaps, judge that at described record judge module authority records in the described common list is whole when locked, determine that the authority records of assigned position is for being replaced authority records.
Further, described command reception unit 501, the authority that also is used for the reception user is authorized instruction;
Correspondingly, described data manipulation device also comprises:
Authorize the record acquiring unit, be used for authorizing instruction according to the authority that described command reception unit receives and obtain authority records;
The list records judging unit is used for judging whether described permissions list exists the described record authority records that acquiring unit obtains of authorizing;
The list records plug-in unit, it is described when authorizing the record authority records that acquiring unit obtains to be used for judging that at described list records judging unit the permissions list of flash memory storage does not exist, and the described record authority records that acquiring unit obtains of authorizing is inserted in the permissions list;
The first tabulation empties the unit, is used for emptying the authority records of common list.
Further, described command reception unit 501 is also for the authority clear instruction that receives the user;
Correspondingly, described data manipulation device also comprises:
The list records clearing cell is used for when there be not the authority records corresponding with described authority clear instruction in the permissions list of flash memory storage, removes described authority records from described permissions list;
The first tabulation empties the unit, is used for emptying the authority records of common list.
The data manipulation device that present embodiment provides, by when search access right records, from internal memory, read the target authority records when in internal memory, having the target authority records, if there is not the target authority records from flash memory, to read again the target authority records in the internal memory, and this target authority records is stored in the internal memory, when again reading this target authority records, will from internal memory, read.Like this, just the frequent authority records of using of a part can be stored in the internal memory for fast access temporarily, all to access flash memory during the query aim authority records at every turn, thereby reduce the number of times of IO operation when data manipulation, improve the operational efficiency of data manipulation.And, not needing the extra new hardware device that increases, can effectively control cost.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process such as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or store-memory body (Random Access Memory, RAM) etc. at random.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (11)
1. the data manipulation method of a smart card is characterized in that, comprising:
Receive user's data manipulation instruction;
According to described user's data manipulation instruction, whether there is the target authority records in the common list of inquiry smart card memory storage, described target authority records is the authority records corresponding with described data manipulation instruction;
When in determining described common list, having the target authority records, from described common list, obtain described target authority records;
When in determining described common list, not having the target authority records, from the permissions list of smart card flash memory storage, obtain described target authority records, and described target authority records is inserted in the described common list;
Carry out corresponding data manipulation according to described target authority records and described data manipulation instruction.
2. data manipulation method according to claim 1 is characterized in that, describedly obtains described target authority records from the permissions list of smart card flash memory storage, and described target authority records inserted in the described common list comprises:
When in the permissions list of determining the smart card flash memory storage, having described target authority records, from described permissions list, obtain described target authority records;
When in determining described common list, not being filled with authority records, described target authority records is inserted in the described common list;
When in determining described common list, being filled with authority records, determine to be replaced authority records according to pre-defined rule, replace the described authority records that is replaced with described target authority records.
3. data manipulation method according to claim 2 is characterized in that, describedly determines to be replaced authority records according to pre-defined rule and comprises:
In described common list, determine an authority records according to pre-defined algorithm, with described authority records as the first record to be replaced;
When definite the described first record to be replaced is locked, according to determining an authority records in the remaining authority records of pre-defined algorithm in described common list, with described authority records as the second record to be replaced;
When definite the described second record to be replaced is not locked, determine that described second replaces to be recorded as and be replaced authority records;
Authority records in determining described common list is whole when locked, determines that the authority records of assigned position is for being replaced authority records.
4. arbitrary described data manipulation method is characterized in that according to claim 1-3, also comprises the process of authorizing user right, is specially:
The authority that receives the user is authorized instruction;
Authorize instruction according to described authority and obtain authority records;
When in the permissions list of determining the smart card flash memory storage, not having the authority records of obtaining, the authority records of obtaining is inserted in the permissions list;
Empty the authority records in the common list.
5. arbitrary described data manipulation method is characterized in that according to claim 1-3, also comprises the process of removing user right, is specially:
Receive user's authority clear instruction;
When in the permissions list of smart card flash memory storage, having the authority records corresponding with described authority clear instruction, from described permissions list, remove described authority records;
Empty the authority records in the common list.
6. a smart card is characterized in that, comprising:
The command reception unit is for the data manipulation instruction that receives the user;
The target record judging unit is used for judging whether the common list of smart card memory storage exists the target authority records, and described target authority records is the authority records corresponding with the data manipulation instruction of described command reception unit reception;
First row table record acquiring unit is used for obtaining described target authority records from described common list when described target record judging unit judges that there is the target authority records in described common list;
Secondary series table record acquiring unit is used for obtaining described target authority records from the permissions list of smart card flash memory storage when described target record judging unit judges that there is not the target authority records in described common list;
First row table record plug-in unit is used for the target authority records that described list records acquiring unit obtains is inserted described common list;
Operating unit is used for carrying out corresponding data manipulation according to target authority records and described data manipulation instruction that described first row table record acquiring unit or described secondary series table record acquiring unit obtain.
7. smart card according to claim 6, it is characterized in that, described secondary series table record acquiring unit, concrete being used for obtained described target authority records from described permissions list when there is described target authority records in the permissions list of determining the smart card flash memory storage.
8. smart card according to claim 7 is characterized in that, described first row table record plug-in unit comprises:
The record judgment sub-unit is used for judging whether described common list has been filled with authority records;
Record intron unit is used for when described record judgment sub-unit judges that described common list is not filled with authority records described target authority records being inserted in the described common list;
Subelement determined in record, is used for determining to be replaced authority records according to pre-defined rule when described record judgment sub-unit judges that described common list has been filled with authority records;
Subelement replaced in record, is used for described target authority records is replaced the authority records that is replaced that described record determines that subelement determines.
9. smart card according to claim 8 is characterized in that, described record determines that subelement comprises:
The record determination module is used for determining an authority records according to pre-defined algorithm at described common list; Perhaps, when the record judge module judges that the definite authority records of described record determination module is locked, according to determining an authority records in the remaining authority records of pre-defined algorithm in described common list;
The record judge module is used for judging whether the definite authority records of described record determination module is locked;
Replace the record determination module, be used for when described record judge module judges that the definite authority records of described record determination module is not locked, determine that the definite authority records of described record determination module is for being replaced authority records; Perhaps, judge that at described record judge module authority records in the described common list is whole when locked, determine that the authority records of assigned position is for being replaced authority records.
10. arbitrary described smart card is characterized in that according to claim 6-9, described command reception unit, and the authority that also is used for the reception user is authorized instruction;
Also comprise:
Authorize the record acquiring unit, be used for authorizing instruction according to the authority that described command reception unit receives and obtain authority records;
The list records judging unit is used for judging whether the permissions list of smart card flash memory storage exists the described record authority records that acquiring unit obtains of authorizing;
The list records plug-in unit, it is described when authorizing the record authority records that acquiring unit obtains to be used for judging that at described list records judging unit described permissions list does not exist, and the described record authority records that acquiring unit obtains of authorizing is inserted in the permissions list;
The first tabulation empties the unit, is used for emptying the authority records of common list.
11. arbitrary described smart card is characterized in that according to claim 6-9, described command reception unit is also for the authority clear instruction that receives the user;
Also comprise:
The list records clearing cell is used for removing described authority records from described permissions list when there be the authority records corresponding with described authority clear instruction in the permissions list of smart card flash memory storage;
The first tabulation empties the unit, is used for emptying the authority records of common list.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105294889A CN101996291B (en) | 2010-11-02 | 2010-11-02 | Data manipulation method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105294889A CN101996291B (en) | 2010-11-02 | 2010-11-02 | Data manipulation method and device |
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| CN101996291A CN101996291A (en) | 2011-03-30 |
| CN101996291B true CN101996291B (en) | 2013-01-16 |
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| CN2010105294889A Expired - Fee Related CN101996291B (en) | 2010-11-02 | 2010-11-02 | Data manipulation method and device |
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| CN108287986B (en) * | 2017-01-10 | 2021-12-28 | 珠海金山办公软件有限公司 | Method and device for instantly granting and withdrawing permission |
| CN109409119A (en) * | 2017-08-17 | 2019-03-01 | 北京京东尚科信息技术有限公司 | Data manipulation method and device |
| CN109558433B (en) * | 2017-09-27 | 2022-04-12 | 北京京东尚科信息技术有限公司 | Method and device for requesting access to HDFS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100578533C (en) * | 2006-06-14 | 2010-01-06 | 普天信息技术研究院 | Method for dynamic aggregating multiple intelligent card function module based on memory card |
| CN101212608A (en) * | 2006-12-26 | 2008-07-02 | 上海乐金广电电子有限公司 | Channel switching method for broadcast receiver |
| KR101443231B1 (en) * | 2007-11-27 | 2014-09-19 | 삼성전자주식회사 | Cache memory capable of adjusting burst length of write-back data in write-back operation |
| CN101477607A (en) * | 2009-01-16 | 2009-07-08 | 北京海升天达科技有限公司 | Smart card and smart card user identity authentication process thereof |
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