CN100437499C - Fast data standby processing method and system for computer platform - Google Patents
Fast data standby processing method and system for computer platform Download PDFInfo
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- CN100437499C CN100437499C CNB2005101050672A CN200510105067A CN100437499C CN 100437499 C CN100437499 C CN 100437499C CN B2005101050672 A CNB2005101050672 A CN B2005101050672A CN 200510105067 A CN200510105067 A CN 200510105067A CN 100437499 C CN100437499 C CN 100437499C
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Abstract
A processing system of quick-fetch data standby for computer platform comprises host end unit and standby end unit. It is featured as forming host end unit by host end interconnection module and quick-fetch image module; forming standby end unit by standby interconnection module, detection module of improper operation state, quick-fetch data backup module and permanent storage module of backup quick-fetch data.
Description
Technical field
The invention relates to a kind of computer information technology, particularly about a kind of computer platform fast data standby processing method and system, can be applicable to a computer platform, provide a fast data standby processing capacity to this computer platform, when unpredictable abnormal running situation takes place in this computer platform, for example when machine or when sudden power breakdown situation takes place, can will upgrade in the high-speed cache in this computer platform but do not made the data of getting soon of permanent storage as yet, be stored into a permanent storage device by another computer platform, for example hard disk unit guarantees that the data of getting soon in this computer platform can not run off because of the abnormal running situation takes place.
Background technology
Each station server in the Intranet system can be provided with other redundant server usually in addition; any therein station server generation abnormal running situation, in the time of can't normally providing service function; provide a redundant function to the server that abnormal running situation (as working as machine) takes place immediately, the server that the originally responsible service function of carrying out of the server of abnormal running is transferred to redundant is responsible for execution.This practice can allow the Intranet system continue to keep network service function, can not interrupt service function to network client because of any station server generation abnormal running situation wherein.
Yet in practical application, when server generation abnormal running situation, high-speed cache wherein is usually still temporary to be had and had manyly upgraded but do not make the data of getting soon of permanent storage as yet.Its original service function of being responsible for carrying out can be transferred to the redundant server though therefore the server of abnormal running situation takes place, these are got data soon and still can therefore run off.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, fundamental purpose of the present invention is to provide a kind of computer platform fast data standby processing method and system, when server generation abnormal running situation, with the temporary data of getting soon of high-speed cache wherein, be stored into a permanent storage device by a redundant computer platform, for example hard disk unit guarantees that the data of getting soon in the server can not run off because of unpredictable abnormal running situation takes place.
Computer platform fast data standby processing method of the present invention and system are applied in a computer platform, provide a fast data standby processing capacity to this computer platform, at this computer platform when unpredictable abnormal running situation takes place because of, for example when machine or when paroxysmal power breakdown situation takes place, can will upgrade in the high-speed cache in this computer platform but do not made the data of getting soon of permanent storage as yet, be stored into a permanent storage device by another computer platform, for example hard disk unit guarantees that the data of getting soon in this computer platform can not run off because of the abnormal running situation takes place.
Computer platform fast data standby processing method of the present invention comprises at least: set up an interconnection mechanism between this master is with computer platform and this redundant computer platform; When practical operation, this main with computer platform on record this main renewal and Status of Backups with each temporary in the high-speed cache of computer platform data combination; And any one data makes up when being updated therein, responsively sends a backup updating active information, and this backup updating active information is sent to this redundant computer platform by this interconnection mechanism; On this redundant computer platform, respond this backup updating active information, get the document copying portion soon with what be updated at present in the high-speed cache of this master with computer platform, and the data storage to of getting soon that will duplicate is got the data backup internal memory soon; And with this get soon backup that the data backup internal memory stores at present soon the data of getting dump to a permanent storage device, wherein, what be updated at present in the high-speed cache that will lead with computer platform gets the document copying portion soon, and the data storage to of getting soon that will duplicate is got after the data backup internal memory soon, this master is carried out a diagnostic routine with the data of getting soon that computer platform is mirrored in this redundant computer platform, and whether the data of getting soon of testing this mirror image can normally dump to this permanent storage device.
On entity structure, computer platform fast data standby disposal system of the present invention comprises at least: a host side unit and a redundant end unit.
Wherein, this host side unit is to carry this master to use computer platform, and its inner structure comprises at least: a host side interconnecting modules, carry this master and use computer platform, and be used for this master is connected to this redundant computer platform with computer platform, allow this master with computer platform and
Can pass data mutually between this redundant computer platform; And one get the mirror image module soon, carries this master and use computer platform, is used for writing down renewal and the Status of Backups of this master with each temporary data combination of the high-speed cache of computer platform; And any one data makes up when being updated therein, responsively sends a backup updating active information, and this backup updating active information is sent to this redundant computer platform by this host side interconnecting modules.
Wherein, this redundant end unit is to carry this redundant computer platform, and its inner structure comprises at least: a redundant end interconnecting modules, carry this redundant computer platform, and be used for that this redundant computer platform is connected to this master and use computer platform, allow this redundant computer platform can receive the backup updating active information that this host side unit sends by this host side interconnecting modules and get data soon and abnormal running information; One abnormal running condition detection module is carried this redundant computer platform, detects this master by the interconnection mechanism between this redundant end interconnecting modules and this host side interconnecting modules and with the main control circuit unit of computer platform whether the abnormal running situation takes place; If then responsively send an abnormal running information; One gets the data backup module soon, carry this redundant computer platform, and it can respond the backup updating active information that this redundant end interconnecting modules receives, get the document copying portion soon with what be updated at present in the high-speed cache of this master with computer platform, and the data storage to of getting soon that will duplicate gets the data backup internal memory soon, and wherein this is got the data backup internal memory soon and is connected to this and gets the data backup module soon; And one backup get data permanent storage module soon, carry this redundant computer platform, and it can respond the abnormal running information that this abnormal running condition detection module is sent, this is got the backup data of getting soon that the data backup internal memory stores at present soon changes and is stored into a permanent storage device, wherein this permanent storage device carries this master with computer platform and this redundant computer platform, and is connected to this backup and gets data permanent storage module soon.
Computer platform fast data standby processing method of the present invention and system set up an interconnection mechanism between the master is with computer platform and redundant computer platform, make this master can pass through this interconnection mechanism with computer platform, the data of will getting soon transmits a copy backup in real time to the redundant computer platform; When the abnormal running situation takes place, can get data storage soon to a permanent storage device by what this interconnection mechanism made that the redundant computer platform will back up, make this master with computer platform after recovering normal operation again, guarantee that this master can not run off because of unpredictable abnormal running situation takes place with the data of getting soon in the computer platform.
Description of drawings
Fig. 1 is the application mode of computer platform fast data standby disposal system of the present invention;
Fig. 2 is the Object Oriented OO component model of computer platform fast data standby disposal system entity structure of the present invention.
Embodiment
Embodiment
Below be conjunction with figs., describe computer platform fast data standby processing method of the present invention and system in detail.
Fig. 1 promptly is the application mode and the distributed systems structure thereof of computer platform fast data standby disposal system of the present invention (part that comprises as label 40 indication frame of broken lines).As shown in the figure, computer platform fast data standby disposal system 40 of the present invention is with dispersing mode in practical application, just be divided into a host side unit 100 and a redundant end unit 200 and carry a main computer platform 10 and the redundant computer platform 20 used respectively, and this master must have a main control circuit unit 11 and at least one high-speed cache 12 with computer platform 10, be used for providing a fast data standby processing capacity with computer platform 10 to this master, this master with computer platform 10 when unpredictable abnormal running situation takes place because of, for example when machine or when paroxysmal power breakdown situation takes place, can be with this master with having upgraded in the high-speed cache in the computer platform 10 12 but do not make the data of permanent storage as yet, be stored into a permanent storage device by this redundant computer platform 20, a hard disk unit 30 for example guarantees that this master can not run off because of unpredictable abnormal running situation takes place with the data of getting soon in the computer platform 10.In practical application, this master for example is the webserver with computer platform 10 and redundant computer platform 20.
As shown in Figure 2, the Object Oriented OO component model of computer platform fast data standby disposal system 40 of the present invention (object-oriented component model) comprises 2 distributed unit at least: (A) host side unit 100; And (B) redundant end unit 200; Wherein this host side unit 100 carries the main computer platform 10 of using, and its inner structure comprises as shown in Figure 2 at least: (A1) host side interconnecting modules 110; And (A2) one get mirror image module 120 soon; 200 of this redundant end units are to carry redundant computer platform 20, and its inner structure comprises as shown in Figure 2 at least: (B1) redundant end interconnecting modules 210; (B2) an abnormal running condition detection module 220; (B3) one get data backup module 230 soon; And (B4) data permanent storage module 240 is got in a backup soon; And can and then comprise optionally that a mirror image gets data diagnostic module 250 soon.
Main individual attribute and function with each module in the host side unit 100 that carries on the computer platform 10 below is described respectively.
Host side interconnecting modules 110 is to correspond to the redundant end interconnecting modules 210 that carries on the redundant computer platform 20, common to this master with the interconnection mechanism that provides a data communication to use between computer platform 10 and this redundant computer platform 20, allow this master with passing each redundant instruction, information between computer platform 10 and this redundant computer platform 20 mutually and getting data soon.On concrete enforcement, for example be to carry out data transmission between host side interconnecting modules 110 and the redundant end interconnecting modules 210 by network on-line.
Get mirror image module 120 soon and be and carry this master with computer platform 10, be used for writing down the renewal and the Status of Backups of the data of getting soon of keeping in each data combination (for example each block) that this master kept in the high-speed cache 12 of computer platform 10; And therein in any one block the data of getting is updated soon the time, send a backup updating active information immediately, and this backup updating active information be sent to this redundant computer platform 20 by this host side interconnecting modules 110.
The individual attribute and the function of each module in the redundant end unit 200 that carries on the redundant computer platform 20 below are described.
Redundant end interconnecting modules 210 is to correspond to main host side interconnecting modules 110 with lift-launch on the computer platform 10, jointly to this master with the interconnection mechanism that provides a data communication to use between computer platform 10 and this redundant computer platform 20, this master is with passing each redundant instruction, information between computer platform 10 and this redundant computer platform 20 mutually and getting data soon.
Abnormal running condition detection module 220 is to carry this redundant computer platform 20, by the interconnection mechanism between this redundant end interconnecting modules 210 and the host side interconnecting modules 110, detect this master and whether the abnormal running situation takes place with the main control circuit unit 11 of computer platform 10; If then responsively send an abnormal running information.
Get data backup module 230 soon and carry this redundant computer platform 20, and it can respond main gets the backup updating active information that mirror image module 120 sends by this host side interconnecting modules 110 and redundant end interconnecting modules 210 soon with lift-launch on the computer platform 10, get the document copying portion soon with what be updated at present in the high-speed cache 12 of this master with computer platform 10, and the data storage to of getting soon that will duplicate is got data backup internal memory 231 soon.
It also is to carry this redundant computer platform 20 that data permanent storage module 240 is got in backup soon, and it can respond the abnormal running information that this abnormal running condition detection module 220 is sent, and this is got backup that data backup internal memory 231 stores at present soon get data soon then be stored into a permanent storage device 30.On concrete enforcement, this permanent storage device 30 can for example be this master with computer platform 10 and this redundant computer platform 20 by an exclusive hard disk unit of shared RAID (Redundant Array of Independent Disks) the array hard disk unit of network or this redundant computer platform 20.
Mirror image is got data diagnostic module 250 soon can carry out a diagnostic routine with the data of getting soon (promptly having stored the data of getting soon of getting soon in the data backup internal memory 231) that computer platform 10 is mirrored in this redundant computer platform 20 to this master, and whether the data of getting soon of testing this mirror image can normally dump to this permanent storage device 30.On concrete enforcement, it is to receive and dispatch relevant instruction and get data soon with the interconnection mechanism between the computer platform 10 (being redundant end interconnecting modules 210 and host side interconnecting modules 110) by redundant computer platform 20 and master that this mirror image is got data diagnostic module 250 soon; These instructions for example comprise " Remote Write ", " Remote Dirty ", " Remote Mirror ", " Remote Sync " and " Remote Auto Sync On/Off '; Wherein " Remote Write " be requirement redundant computer platform 20 with some soon the data of getting be written to permanent storage device 30; " Remote Dirty " obtains from redundant computer platform 20 to get data inventory and relevant buffering data soon; " Remote Mirror " is the data of getting soon inventory and the relevant buffering data that obtains mirror image from redundant computer platform 20; " Remote Sync " is that requirement redundant computer platform 20 data of will getting soon all is written to permanent storage device 30; " Remote Auto Sync On/Off " is used to open or close redundant computer platform 20 and main with the automatically synchronous update functions (auto sync function) between the computer platform 10.Mirror image is got data diagnostic module 250 soon and can be instructed by these, make redundant computer platform 20 and master carry out a diagnostic routine, test this master and whether can normally dump to this permanent storage device 30 with the data of getting soon that computer platform 10 is mirrored to redundant computer platform 20 with computer platform 10.In practical operation, this diagnostic routine for example is that the data of getting soon with mirror image is written to permanent storage device 30 piecemeal, and will be written to the data of permanent storage device 30 with get soon in the data backup internal memory 231 mirror image soon the data of getting compare, judge whether the data of getting soon that is written to permanent storage device 30 correct.
In addition, the redundant end unit 200 that carries on the redundant computer platform 20 can and then comprise a removing module 260, be written in the hard disk unit 30, need not when redundant computer platform 20 backs up with the data of getting soon on the computer platform 10 main, this removing module 260 is activated, with get soon in the data backup internal memory 231 temporary backup soon the data of getting delete.
Below promptly the method for operation of computer platform fast data standby disposal system 40 of the present invention when the practical application is described with application example.
Please consult Fig. 1 and Fig. 2 simultaneously, when actual motion, main promptly some program data sign indicating numbers of using always can being temporarily stored in computer platform 10 increased data processing usefulness in the high-speed cache 12, and may constantly upgrade these and get data soon in its implementation.If main operation with computer platform 10 continues to keep normally, do not take place the abnormal running situation, then main main control circuit unit 11 with computer platform 10 can be regularly with these soon the data of getting be written back to the RAID hard disk unit 30 that this master shares with the networks under the computer platform 10 (but also can be this master use computer platform 10 exclusive hard disk unit), the data of getting soon that preservation was forever upgraded.In addition, in this simultaneously, get mirror image module 120 soon in the host side unit 100 in the computer platform fast data standby disposal system 40 of the present invention, also can write down the renewal and the Status of Backups of the temporary data of getting soon of each block in this high-speed cache 12 constantly, and therein in any one block the data of getting is updated soon the time, responsively send a backup updating active information immediately, and with this backup updating active information together with the data of getting soon after upgrading, together be sent to this redundant computer platform 20 by this host side interconnecting modules 110, make the data of getting soon after the redundant end interconnecting modules 210 that carries on this redundant computer platform 20 receives this backup updating active information and renewal, and it is transferred to get data backup module 230 soon, make this data storage of getting soon of getting soon after the renewal that data backup module 230 responsively will receive get data backup internal memory 231 soon to this.This gets data backup soon along with the data of getting soon in the main high-speed cache 12 with computer platform 10 constantly is updated and repeats continuously.In addition, after the master is mirrored to this redundant computer platform 20 with computer platform 10 with the data of getting soon in the high-speed cache 12 wherein (getting soon after the data backup internal memory 231 in redundant computer platform 20 stored in a backup just will getting data soon), it can activate mirror image and get data diagnostic module 250 execution one diagnostic routine soon, and whether the data of getting soon of testing this mirror image can normally dump to this permanent storage device 30.
If main operation with computer platform 10 continues to keep normally and not taking place the abnormal running situation, then main main control circuit unit 11 with computer platform 10 can regularly be written back to the data of getting soon in the high-speed cache 12 hard disk unit 30 that this master links to each other with computer platform 10.In the case, get mirror image module 120 soon and can responsively send a backup removing active information immediately, and be sent to by host side interconnecting modules 110 and redundant end interconnecting modules 210 and get data backup module 230 soon on the redundant computer platform 20, make this get data backup module 230 soon and responsively remove before to be stored in and get the data of getting soon corresponding in the data backup internal memory 231 soon.
Otherwise, if the abnormal running situation takes place in main main control circuit unit 11 with computer platform 10, then it can make abnormal running condition detection module 220 on the redundant computer platform 20 responsively send a backup permanent storage active information, and the order backup is got data permanent storage module 240 soon and responsively will be temporarily stored in to get soon and get data storage soon to this hard disk unit 30 in the data backup internal memory 231.Can guarantee to lead and can not run off because of unpredictable abnormal running situation takes place with the data of getting soon in the computer platform 10.If the master all normally is written to hard disk unit 30, is need not when redundant computer platform 20 backs up with the data of getting soon on the computer platform 10, then removing module 260 promptly can be activated, and the data of getting soon of getting backup temporary in the data backup internal memory 231 is soon deleted.
This computer platform fast data standby processing method may further comprise the steps at least.
At first, between this master is with computer platform 10 and this redundant computer platform 20, set up an interconnection mechanism.
When practical operation, main with record on the computer platform 10 this main renewal and Status of Backups with each temporary in the high-speed cache of computer platform 10 data combination at this; And any one data makes up when being updated therein, responsively sends a backup updating active information, and this backup updating active information is sent to this redundant computer platform 20 by this interconnection mechanism.
Subsequently, on this redundant computer platform 20, respond this backup updating active information, get the document copying portion soon with what be updated at present in the high-speed cache of this master with computer platform 10, and the data storage to of getting soon that will duplicate is got soon in the data backup internal memory 231.
At last this is got soon backup that data backup internal memory 231 stores at present soon the data of getting dump in the permanent storage device 30.
Generally speaking, the invention provides a kind of computer platform fast data standby processing method and system of novelty, can arrange in pairs or groups to a main computer platform and the redundant computer platform used, provide a fast data standby processing capacity to this master with computer platform by this redundant computer platform; The present invention sets up an interconnection mechanism between the master is with computer platform and redundant computer platform, make this master can transmit a copy backup in real time to the redundant computer platform by this interconnection mechanism data of will getting soon with computer platform; And when the abnormal running situation takes place, the data of getting soon that can make the redundant computer platform back up by this interconnection mechanism, be stored into a permanent storage device, make this master use computer platform after replying normal operation again, can obtain the data of getting soon that first cause generation abnormal running situation runs off from this permanent storage device, guarantee that this master can not run off because of unpredictable abnormal running situation takes place with the data of getting soon in the computer platform.Therefore the present invention has progressive and practicality.
Claims (9)
1. computer platform fast data standby processing method, be applied in a main computer platform and the redundant computer platform used, and this master has a main control circuit unit and at least one high-speed cache with computer platform, provide a fast data standby processing capacity to this master with computer platform by this redundant computer platform, it is characterized in that this computer platform fast data standby processing method comprises at least:
Between this master is with computer platform and this redundant computer platform, set up an interconnection mechanism;
When practical operation, this main with computer platform on record this main renewal and Status of Backups with each temporary in the high-speed cache of computer platform data combination; And any one data makes up when being updated therein, responsively sends a backup updating active information, and this backup updating active information is sent to this redundant computer platform by this interconnection mechanism;
On this redundant computer platform, respond this backup updating active information, get the document copying portion soon with what be updated at present in the high-speed cache of this master with computer platform, and the data storage to of getting soon that will duplicate is got the data backup internal memory soon; And
With this get soon backup that the data backup internal memory stores at present soon the data of getting dump to a permanent storage device,
Wherein, what be updated at present in the high-speed cache that will lead with computer platform gets the document copying portion soon, and the data storage to of getting soon that will duplicate is got after the data backup internal memory soon, this master is carried out a diagnostic routine with the data of getting soon that computer platform is mirrored in this redundant computer platform, and whether the data of getting soon of testing this mirror image can normally dump to this permanent storage device.
2. computer platform fast data standby processing method as claimed in claim 1, its feature
Be that this master is the webserver with computer platform and this redundant computer platform.
3. computer platform fast data standby processing method as claimed in claim 1 is characterized in that, this permanent storage device is a RAID array hard disk unit.
4. computer platform fast data standby processing method as claimed in claim 1 is characterized in that, this computer platform fast data standby processing method and then also comprise:
Be written to a hard disk unit, do not need when the redundant computer platform backs up with the data of getting soon on the computer platform this master, with this get soon in the data backup internal memory temporary backup soon the data of getting delete.
5. computer platform fast data standby disposal system, the master that can arrange in pairs or groups uses a computer platform and a redundant computer platform, and this master has a main control circuit unit and at least one high-speed cache with computer platform, provide a fast data standby processing capacity to this master with computer platform by this redundant computer platform, it is characterized in that this computer platform fast data standby disposal system comprises at least: a host side unit and a redundant end unit;
Wherein
This host side unit is to carry this master to use computer platform, and its inner structure comprises at least:
One host side interconnecting modules carries this master and uses computer platform, and is used for this master is connected to this redundant computer platform with computer platform, allows this master with passing data mutually between computer platform and this redundant computer platform; And
One gets the mirror image module soon, carries this master and uses computer platform, is used for writing down renewal and the Status of Backups of this master with each temporary data combination of the high-speed cache of computer platform; And any one data makes up when being updated therein, responsively sends a backup updating active information, and this backup updating active information is sent to this redundant computer platform by this host side interconnecting modules;
And wherein
This redundant end unit is to carry this redundant computer platform, and its inner structure comprises at least:
One redundant end interconnecting modules, carry this redundant computer platform, and be used for that this redundant computer platform is connected to this master and use computer platform, allow this redundant computer platform can receive the backup updating active information that this host side unit sends by this host side interconnecting modules and get data soon and abnormal running information;
One abnormal running condition detection module is carried this redundant computer platform, detects this master by the interconnection mechanism between this redundant end interconnecting modules and this host side interconnecting modules and with the main control circuit unit of computer platform whether the abnormal running situation takes place; If then responsively send an abnormal running information;
One gets the data backup module soon, carry this redundant computer platform, and it can respond the backup updating active information that this redundant end interconnecting modules receives, get the document copying portion soon with what be updated at present in the high-speed cache of this master with computer platform, and the data storage to of getting soon that will duplicate gets the data backup internal memory soon, and wherein this is got the data backup internal memory soon and is connected to this and gets the data backup module soon; And
Data permanent storage module is got in one backup soon, carry this redundant computer platform, and it can respond the abnormal running information that this abnormal running condition detection module is sent, this is got the backup data of getting soon that the data backup internal memory stores at present soon changes and is stored into a permanent storage device, wherein this permanent storage device carries this master with computer platform and this redundant computer platform, and is connected to this backup and gets data permanent storage module soon.
6. computer platform fast data standby disposal system as claimed in claim 5 is characterized in that, this master is the webserver with computer platform and this redundant computer platform.
7. computer platform fast data standby disposal system as claimed in claim 5 is characterized in that, this permanent storage device is a RAID array hard disk unit.
8. computer platform fast data standby disposal system as claimed in claim 5 is characterized in that, this redundant end unit and then also comprise:
One mirror image is got the data diagnostic module soon, can carry out a diagnostic routine with the data of getting soon that computer platform is mirrored in this redundant computer platform to this master, and whether the data of getting soon of testing this mirror image can normally dump to this permanent storage device.
9. computer platform fast data standby disposal system as claimed in claim 5 is characterized in that, this redundant end unit and then also comprise:
One removing module is written to a hard disk unit, does not need when the redundant computer platform backs up with the data of getting soon on the computer platform this master, and removing module is activated this data of getting soon of getting backup temporary in the data backup internal memory is soon deleted.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101050672A CN100437499C (en) | 2005-09-26 | 2005-09-26 | Fast data standby processing method and system for computer platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101050672A CN100437499C (en) | 2005-09-26 | 2005-09-26 | Fast data standby processing method and system for computer platform |
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| CN1940875A CN1940875A (en) | 2007-04-04 |
| CN100437499C true CN100437499C (en) | 2008-11-26 |
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| CN103377100B (en) * | 2012-04-26 | 2016-12-14 | 华为技术有限公司 | A kind of data back up method, network node and system |
| CN104360917B (en) * | 2014-11-29 | 2017-06-27 | 中国航空工业集团公司第六三一研究所 | A kind of avionics system N+1 module backup methods |
| CN107765990A (en) * | 2016-08-17 | 2018-03-06 | 中兴通讯股份有限公司 | A kind of system disk management method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142634A (en) * | 1995-06-19 | 1997-02-12 | 株式会社东芝 | Apparatus for flushing contents of cache memory |
| US20040210795A1 (en) * | 2003-04-17 | 2004-10-21 | Eric Anderson | Data redundancy for writes using remote storage system cache memory |
| CN1670709A (en) * | 2004-03-19 | 2005-09-21 | 株式会社日立制作所 | A replicated database system and device executing log data transfer synchronously and database data transfer asynchronously |
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2005
- 2005-09-26 CN CNB2005101050672A patent/CN100437499C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142634A (en) * | 1995-06-19 | 1997-02-12 | 株式会社东芝 | Apparatus for flushing contents of cache memory |
| US20040210795A1 (en) * | 2003-04-17 | 2004-10-21 | Eric Anderson | Data redundancy for writes using remote storage system cache memory |
| CN1670709A (en) * | 2004-03-19 | 2005-09-21 | 株式会社日立制作所 | A replicated database system and device executing log data transfer synchronously and database data transfer asynchronously |
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| CN1940875A (en) | 2007-04-04 |
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