CN102831034A - Multimode backup and quick recovery method based on embedded Linux device - Google Patents

Multimode backup and quick recovery method based on embedded Linux device Download PDF

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CN102831034A
CN102831034A CN2012102884351A CN201210288435A CN102831034A CN 102831034 A CN102831034 A CN 102831034A CN 2012102884351 A CN2012102884351 A CN 2012102884351A CN 201210288435 A CN201210288435 A CN 201210288435A CN 102831034 A CN102831034 A CN 102831034A
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snapshot
application
flash
script
linux
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CN102831034B (en
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于海
虞跃
姚启桂
邓辉
吴鹏
陈磊
王玮
侯功
沈文
喻强
黄治
于鹏飞
陈伟
任杰
张增华
孙晓艳
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Global Energy Interconnection Research Institute
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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Abstract

The invention provides a multimode backup and quick recovery method based on an embedded Linux device. The time of the embedded Linux device from power on to expected operative mode can be shortened greatly, and interruption time of the device in operation can be shortened generally in 5 seconds, and the embedded device in complex environment is well benefited. Multiple mode configuration options can be stored in advance for multiple application modes. The expected mode is recovered according to the specific circumstance during recovery, and various field service applications are adapted flexibly. The embedded Linux is modified less, and largely model abstraction of the embedded Linux is modified. Programming is independent, only a small part of Linux code patches needs to be made, and accordingly the method is convenient to apply to various special embedded Linux devices. In addition, various snapshots are stored in a compressed format, the resource requirements of Flash are lowered greatly, and no special requirements for CPUs (central processing units) and internal memories are needed.

Description

Multimode backup and quick recovery method based on embedded equipment Linux
Technical field
The invention belongs to field of computer technology, be specifically related to a kind of multimode backup and quick recovery method based on embedded equipment Linux.
Background technology
Embedded device mainly is made up of flush bonding processor, relevant supporting hardware and embedded software system, and it is the device that can work independently that integrates software and hardware.Embedded software comprises hardware-related bottom software, operating system, graphical interfaces, communication protocol, the data base set application software etc. of unifying.Built-in Linux is widely used in numerous embedded devices as a kind of main free, powerful operating system of increasing income.From the software angle, characteristics such as embedded device has can not the property revised, configuration is lower, system is professional and real-time is stronger.Therefore, for the embedded device of various special uses, realize that the backup of general multimode and restore funcitons fast for shortening work break period, adapt to the complex work environment, improving user experience, all are highly significant.
Built-in Linux have open source code, safe and reliable, characteristics such as kernel is customizable, be the first-selection of numerous embedded device system platforms.But owing to the architecture of Linux based on file, the problem of system start-up overlong time is difficult to basic improvement, counts the load time of each application program again, generally will spend tens seconds.
Summary of the invention
For overcoming above-mentioned defective; The invention provides a kind of multimode backup and quick recovery method, shortened embedded type Linux equipment greatly from power on to the time of expecting duty based on embedded equipment Linux, generally can be within 5 seconds; And shortened equipment work break period; For the embedded device under the complex environment benifit is arranged very, solved the problem of system start-up overlong time, have the advantages that release time is short, ease for use is good and resource occupation is few.
For realizing above-mentioned purpose, the present invention provides a kind of multimode backup and quick recovery method based on embedded equipment Linux, comprises state backup procedure and quick rejuvenation, it is characterized in that said state backup procedure comprises step:
(101). preserve the relevant down duty of applied environment, be converted into application message snapshot and application function snapshot, compression writes the corresponding config option block among the Flash;
(102). after withdrawing from applied environment, preserve the duty of device drive layer, be converted into the driving snapshot, compression writes Flash;
(103). preserve the status information of CPU and the running environment of Linux, promptly form the kernel snapshot, the compression of kernel snapshot is write Flash;
Wherein, Flash comprises Flash subregion 0, Flash subregion 1, Flash subregion 2 and Flash subregion 3.
Said quick rejuvenation comprises step:
(201). the FastRecover BIOS among the copy Flash carries out to internal memory;
(202). kernel snapshot among decompress(ion), the parsing Flash and driving snapshot, initialization corresponding C PU register, internal memory and peripheral hardware;
(203). the config option that confirm to need loads number, decompress(ion) and resolve application message snapshot corresponding among the Flash and the application function snapshot to specified memory;
(204). the control of embedded equipment is transferred to Linux, obtains corresponding application message script, application function script, carries out initialization sequentially by it.
In the optimal technical scheme provided by the invention, said step 101 comprises the steps:
(101-1). utilize the current application state of shell script checkout equipment, obtain kernel module information, process operation information, disk carry information and application configuration information, and they are integrated into the application message script;
(101-2). the application message script is converted into application message soon in accordance with the form provided;
(101-3). analyze the current register tables of function of tonic chord device, and the configuration register value of this device relevant interface part, form the application function script;
(101-4). the application function script is converted into application function soon in accordance with the form provided;
(101-5). application message snapshot and application function snapshot are compressed the config option N piece district that inserts Flash subregion 3, and the selection of N is confirmed according to the rule of multimode selection strategy, is so far just carried out the complete preservation of certain state of using in the N block.
In second optimal technical scheme provided by the invention, in said step 101-3, function of tonic chord device is exactly the multimode conservation object in the equipment, and said multimode conservation object comprises: the PON chip of the exchange chip of industrial switch and passive light network terminal.
In the 3rd optimal technical scheme provided by the invention, process operation, module loading, disk carry and application configuration under the use perl script language detection application environment in the said step 101 are obtained application message, recording status information, and copy configuration file.
In the 4th optimal technical scheme provided by the invention, said step 102 comprises the steps:
(102-1). kill operation application process, uninstall the drive of carry and uninstall the kernel module that has loaded;
(102-2). preserve the register value of each peripheral hardware driver module and the register value of relevant interface, form and drive register tables;
(102-3). will drive register tables and be converted into the driving snapshot;
(102-4). will drive the snapshot compression, and insert in the Flash subregion 2.
In the 5th optimal technical scheme provided by the invention, said step 103 comprises the steps:
(103-1). preserve each buffer status value of current C PU, obtain the data structure that the Linux operation is correlated with in the internal memory and be converted into memory table;
(103-2). said register value and memory table unification are converted into the kernel snapshot;
(103-3). the compression of kernel snapshot is inserted in the Flash subregion 1.
In the 6th optimal technical scheme provided by the invention, said step 201 comprises the steps:
(201-1). system powers on or when restarting, at first loads bootloader, in bootloader, selects whether to get into the FastRecover pattern;
(201-2). the FastRecoer BIOS in the copy Flash subregion 0 is to internal memory and execution;
Wherein, FastRecoer BIOS has the function of decompression, recovery snapshot.
In the 7th optimal technical scheme provided by the invention, said step 202 comprises the steps:
(202-1). decompress(ion) is also resolved the kernel snapshot in the Flash subregion 1, recovers the Linux related data structures in corresponding C PU register, the internal memory;
(202-2). decompress(ion) is also resolved the driving snapshot in the Flash subregion 2, recovers peripheral hardware register, relevant interface register, and peripheral hardware is carried out initialization.
In the 8th optimal technical scheme provided by the invention, said step 203 comprises the steps:
(203-1). confirm the config option N value that needs load according to application oriented multimode selection strategy;
(203-2). decompress(ion) is also resolved application message snapshot among the config option piece N and application function snapshot to specified memory zone in the Flash subregion 3;
Wherein, the corresponding different application state of each N value; Multimode is divided according to concrete the application and is confirmed, comprising: the various states corresponding with concrete application strategy, and promptly every kind of state adapts to a kind of application strategy; The full speed of discriminating device or the state of slow running; With the battery saving mode of discriminating device or the state of normal mode.
In the 9th optimal technical scheme provided by the invention, said step 204 comprises the steps:
(204-1). the control of embedded equipment is given the linux kernel master routine, and obtains application message script and application function script at the internal memory assigned address;
(204-2). according to application message script carry disk, load-on module, executive process and configuration parameter;
(204-3). according to the corresponding function of tonic chord device of application function script initialization.
With the prior art ratio; A kind of multimode backup and quick recovery method provided by the invention based on embedded equipment Linux; Embedded type Linux equipment can contract greatly from power on to the time of expecting duty; Generally can be within 5 seconds, shortened equipment work break period, for the embedded device under the complex environment benifit is arranged very; And, can preserve a plurality of state configuration options towards multiple application state in advance, be reduced to expectation state during recovery as the case may be, the multiple on-the-spot operating position of flexible adaptation; Also have, less to the built-in Linux change, major part is abstract to the model of built-in Linux, and independent the programming only need be done the Linux code patch of few part, is convenient to this method and on multiple special-purpose embedded type Linux equipment, uses; Moreover, adopt compressed format to preserve various snapshot images, reduce the resource requirement of Flash widely, CPU and internal memory there are not specific (special) requirements yet.
Description of drawings
Fig. 1 is based on the multimode backup of embedded equipment Linux and the overview flow chart of quick recovery method.
The overall hierarchy figure that Fig. 2 carries out for method.
Fig. 3 is the process flow diagram of state backup procedure.
Fig. 4 is the process flow diagram of quick rejuvenation.
Embodiment
Like Fig. 1, a kind of multimode backup and the quick recovery method shown in 2 based on embedded equipment Linux, comprise state backup procedure and quick rejuvenation, said state backup procedure comprises step:
Step 101: preserve the relevant down duty of applied environment, be converted into application message snapshot and application function snapshot, compression writes the corresponding config option block among the Flash.
Step 102: after withdrawing from applied environment, preserve the duty of device drive layer, be converted into the driving snapshot, compression writes Flash.
Step 103: preserve the status information of CPU and the running environment of Linux, promptly form the kernel snapshot, the compression of kernel snapshot is write Flash.
Said quick rejuvenation comprises step:
Step 201: the FastRecover BIOS among the copy Flash carries out to internal memory, dominates follow-up rejuvenation by this program.
Step 202: kernel snapshot among decompress(ion), the parsing Flash and driving snapshot, initialization corresponding C PU register, internal memory, peripheral hardware.
Step 203: the config option that confirm to need loads number, decompress(ion), resolve application message snapshot corresponding among the Flash and application function snapshot to specified memory.
Step 204: control is transferred to Linux, obtains corresponding application message script, application function script, carries out initialization sequentially by it.
Situations such as the process operation that the obtaining of the application message in the said step 101 is to use under the perl script language detection application environment, module loading, disk carry, application configuration, recording status information, copy configuration file.
Application function snapshot in the said step 101 is to preserve to the state of function of tonic chord device; It is the main object that the equipment multimode is preserved; The selection of function of tonic chord device comes fixed as the case may be; Exchange chip in for example can selection equipment in the switch carries out state to be preserved and recovers, thereby realizes the backup of multiple exchange configuration status, can certainly preserve to the assembled state of a plurality of function elements.The concrete state of realizing being to use perl script look facility register uses designed regular in advance, is translated into corresponding configuration script, and this partial content need carry out custom design according to application.
Withdraw from applied environment in the said step 102 and just carry out follow-up state preservation work; After promptly killing application process, unloading disk, Unload module; Follow-up like this linux system that needs a minimum of backup; Thereby simplified the state of device drive layer and inner nuclear layer is preserved, made the config option in the claim 3 preserve complete face simultaneously, be convenient to realize the multimode selection strategy to application layer.
Snapshot functions and compression hold function are used in many places in the said state backup-step.These functions are all used the C language development, directly operation under the linux environment, and wherein snapshot functions has three kinds of script snapshots, register snapshot, memory image according to the object difference, realize with data of different types structure and algorithm respectively.It promptly is that the GZIP form of using always is accomplished that the compression hold function is used.
FastRecover BIOS uses the C language development in the said step 201, is the program of an independent operating, before Linux starts, has born the work that recovers snapshot, has functions such as decompress(ion), parsing snapshot, is the inverse operation of the said function of claim 5.
Wherein, the corresponding different application state of each N value; Multimode is divided according to concrete the application and is confirmed, comprising: the various states corresponding with concrete application strategy, and promptly every kind of state adapts to a kind of application strategy; The full speed of discriminating device or the state of slow running; With the battery saving mode of discriminating device or the state of normal mode.
Through following embodiment the state backup procedure is done further to explain.
As shown in Figure 3, said state backup procedure comprises that step is following:
1. utilize the current application state of shell script checkout equipment, obtain kernel module information, process operation information, disk carry information, application configuration information, and they are integrated into the application message script.
2. the application message script is converted into application message soon in accordance with the form provided.
3. analyze the current register tables of function of tonic chord device, and the register value of relevant interface, the application function script formed.The function of tonic chord device here is exactly the main object that the multimode in the equipment is preserved.
4. the application function script is converted into application function soon in accordance with the form provided.
5. application message snapshot and application function snapshot are compressed the config option N piece district that inserts Flash subregion 3, the selection of N is confirmed according to the rule of multimode selection strategy, is so far just carried out the complete preservation of certain state of using in the N block.
6. kill operation application process, uninstall carry drive, uninstall the kernel module that has loaded.
7. preserve the register value of each peripheral hardware driver module under this state and the I register value of relevant interface, form and drive register tables.
8. will drive register tables and be converted into the driving snapshot.
9. will drive the snapshot compression, and insert in the Flash subregion 2.
10. preserve each buffer status value of current C PU, obtain the data structure that the Linux operation is correlated with in the internal memory and be converted into memory table.
11. above-mentioned register value and memory table unification are converted into the kernel snapshot.
12. the compression of kernel snapshot is inserted in the Flash subregion 1.
13. so far, the state backup procedure is accomplished, and can restart or shut down.
Through following embodiment quick rejuvenation is done further to explain.
As shown in Figure 4, said quick rejuvenation comprises step:
1. system powers on or when restarting, at first loads bootloader, in bootloader, selects whether to get into the FastRecover pattern.
2. the FastRecoer BIOS in the copy Flash subregion 0 carries out FastRecoer BIOS to internal memory in internal memory, and this program has functions such as decompression, recovery snapshot.
Decompress(ion), resolve the kernel snapshot restore corresponding C PU register in the Flash subregion 1, the Linux related data structures in the internal memory.
Decompress(ion), resolve driving snapshot restore peripheral hardware register, relevant interface register in the Flash subregion 2, and carry out some necessary peripheral hardware initialization.
5. confirm the config option N value that needs load according to the state selection strategy.
6. application message snapshot and application function snapshot to the specified memory among the config option piece N is regional in decompress(ion), the parsing Flash subregion 3.
7. control is given linux kernel master routine Main, and obtains application message script, application function script at the internal memory assigned address
8. according to application message script carry disk, load-on module, executive process, configuration parameter.
According to the corresponding function of tonic chord device of application function script initialization to the assigned work state.
10. this moment, equipment promptly returned to the duty of expectation fully.
What need statement is that content of the present invention and embodiment are intended to prove the practical application of technical scheme provided by the present invention, should not be construed as the qualification to protection domain of the present invention.Those skilled in the art can do various modifications, be equal to replacement or improvement under spirit of the present invention and principle inspiration.But these changes or modification are all in the protection domain that application is awaited the reply.

Claims (10)

1. multimode backup and quick recovery method based on an embedded equipment Linux comprise state backup procedure and quick rejuvenation, it is characterized in that said state backup procedure comprises step:
(101). preserve the relevant down duty of applied environment, be converted into application message snapshot and application function snapshot, compression writes the corresponding config option block among the Flash;
(102). after withdrawing from applied environment, preserve the duty of device drive layer, be converted into the driving snapshot, compression writes Flash;
(103). preserve the status information of CPU and the running environment of Linux, promptly form the kernel snapshot, the compression of kernel snapshot is write Flash;
Wherein, Flash comprises Flash subregion 0, Flash subregion 1, Flash subregion 2 and Flash subregion 3.
Said quick rejuvenation comprises step:
(201). the FastRecover BIOS among the copy Flash carries out to internal memory;
(202). kernel snapshot among decompress(ion), the parsing Flash and driving snapshot, initialization corresponding C PU register, internal memory and peripheral hardware;
(203). the config option that confirm to need loads number, decompress(ion) and resolve application message snapshot corresponding among the Flash and the application function snapshot to specified memory;
(204). the control of embedded equipment is transferred to Linux, obtains corresponding application message script, application function script, carries out initialization sequentially by it.
2. method according to claim 1 is characterized in that said step 101 comprises the steps:
(101-1). utilize the current application state of shell script checkout equipment, obtain kernel module information, process operation information, disk carry information and application configuration information, and they are integrated into the application message script;
(101-2). the application message script is converted into application message soon in accordance with the form provided;
(101-3). analyze the current register tables of function of tonic chord device, and the configuration register value of this device relevant interface part, form the application function script;
(101-4). the application function script is converted into application function soon in accordance with the form provided;
(101-5). application message snapshot and application function snapshot are compressed the config option N piece district that inserts Flash subregion 3, and the selection of N is confirmed according to the rule of multimode selection strategy, is so far just carried out the complete preservation of certain state of using in the N block.
3. method according to claim 2; It is characterized in that; In said step 101-3, function of tonic chord device is exactly the multimode conservation object in the equipment, and said multimode conservation object comprises: the PON chip of the exchange chip of industrial switch and passive light network terminal.
4. according to the described method of claim 1-3; It is characterized in that; Process operation, module loading, disk carry and application configuration under the use perl script language detection application environment in the said step 101 are obtained application message, recording status information, and copy configuration file.
5. method according to claim 1 is characterized in that said step 102 comprises the steps:
(102-1). kill operation application process, uninstall the drive of carry and uninstall the kernel module that has loaded;
(102-2). preserve the register value of each peripheral hardware driver module and the register value of relevant interface, form and drive register tables;
(102-3). will drive register tables and be converted into the driving snapshot;
(102-4). will drive the snapshot compression, and insert in the Flash subregion 2.
6. method according to claim 1 is characterized in that said step 103 comprises the steps:
(103-1). preserve each buffer status value of current C PU, obtain the data structure that the Linux operation is correlated with in the internal memory and be converted into memory table;
(103-2). said register value and memory table unification are converted into the kernel snapshot;
(103-3). the compression of kernel snapshot is inserted in the Flash subregion 1.
7. method according to claim 1 is characterized in that said step 201 comprises the steps:
(201-1). system powers on or when restarting, at first loads bootloader, in bootloader, selects whether to get into the FastRecover pattern;
(201-2). the FastRecoer BIOS in the copy Flash subregion 0 is to internal memory and execution;
Wherein, FastRecoer BIOS has the function of decompression, recovery snapshot.
8. method according to claim 1 is characterized in that said step 202 comprises the steps:
(202-1). decompress(ion) is also resolved the kernel snapshot in the Flash subregion 1, recovers the Linux related data structures in corresponding C PU register, the internal memory;
(202-2). decompress(ion) is also resolved the driving snapshot in the Flash subregion 2, recovers peripheral hardware register, relevant interface register, and peripheral hardware is carried out initialization.
9. method according to claim 1 is characterized in that said step 203 comprises the steps:
(203-1). confirm the config option N value that needs load according to application oriented multimode selection strategy;
(203-2). decompress(ion) is also resolved application message snapshot among the config option piece N and application function snapshot to specified memory zone in the Flash subregion 3;
Wherein, the corresponding different application state of each N value; Multimode is divided according to concrete the application and is confirmed, comprising: the various states corresponding with concrete application strategy, and promptly every kind of state adapts to a kind of application strategy; The full speed of discriminating device or the state of slow running; With the battery saving mode of discriminating device or the state of normal mode.
10. method according to claim 1 is characterized in that said step 204 comprises the steps:
(204-1). the control of embedded equipment is given the linux kernel master routine, and obtains application message script and application function script at the internal memory assigned address;
(204-2). according to application message script carry disk, load-on module, executive process and configuration parameter;
(204-3). according to the corresponding function of tonic chord device of application function script initialization.
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CN110837343A (en) * 2019-09-27 2020-02-25 华为技术有限公司 Snapshot processing method and device and terminal
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CN114218010A (en) * 2022-02-14 2022-03-22 柏科数据技术(深圳)股份有限公司 Data backup and recovery method, system, terminal equipment and storage medium

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CN103544097B (en) * 2013-10-21 2016-04-13 广东威创视讯科技股份有限公司 The log storing method of embedded system, system and log read method and system
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CN103761197A (en) * 2014-01-16 2014-04-30 深圳市亿维自动化技术有限公司 Method and system for storing data by using Flash and RAM (random-access memory)
CN106164866B (en) * 2014-04-08 2020-01-10 微软技术许可有限责任公司 Efficient migration of client-side WEB state
CN106164866A (en) * 2014-04-08 2016-11-23 微软技术许可有限责任公司 The efficient migration of client-side WEB state
CN104468419A (en) * 2014-12-22 2015-03-25 上海斐讯数据通信技术有限公司 Method and system for recovering configuration of interchanger and interchanger
WO2018098834A1 (en) * 2016-11-29 2018-06-07 邦彦技术股份有限公司 Method for ensuring normal booting of linux operating system
CN110806950A (en) * 2019-09-19 2020-02-18 平安科技(深圳)有限公司 Snapshot generation method and device based on polymorphic storage mechanism and computer equipment
CN110837343A (en) * 2019-09-27 2020-02-25 华为技术有限公司 Snapshot processing method and device and terminal
CN113076220A (en) * 2020-01-06 2021-07-06 阿里巴巴集团控股有限公司 Data processing method and device, electronic equipment and computer readable medium
CN113076220B (en) * 2020-01-06 2024-05-31 阿里巴巴集团控股有限公司 Data processing method, device, electronic equipment and computer readable medium
CN114064348A (en) * 2020-07-29 2022-02-18 中移(苏州)软件技术有限公司 Backup restoration method, device and equipment and computer readable storage medium
CN114218010A (en) * 2022-02-14 2022-03-22 柏科数据技术(深圳)股份有限公司 Data backup and recovery method, system, terminal equipment and storage medium

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