CN109522286B - Processing method and device of file system - Google Patents
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Abstract
The disclosure relates to a processing method and a device of a file system, comprising the following steps: reading and loading the corresponding relation between a plurality of file systems and identifiers; respectively acquiring storage paths of files in a plurality of file systems; and respectively matching the corresponding identifiers for the storage paths of the files in each file system according to the corresponding relationship between the file systems and the identifiers. When any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path, so that the relative balance of the data quantity among a plurality of file systems is ensured, and the configuration is simple.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a method and an apparatus for processing a file system.
Background
With the continuous richness and the strong functions of various intelligent devices, files in an operating system of the intelligent device are richer and richer. Since there are multiple independent file systems in the operating system, in order to facilitate management and use of multiple file systems, it is necessary to incorporate these multiple file systems into a unified global namespace (nameapace). Thereby facilitating a user of the smart device to access and use the plurality of independent file systems through the unified file system.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a processing method and apparatus for a file system. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, there is provided a processing method of a file system, including:
reading and loading the corresponding relation between a plurality of file systems and identifiers;
respectively acquiring storage paths of files in the file systems;
and respectively matching corresponding identifiers for the storage paths of the files in each file system according to the corresponding relation between the file systems and the identifiers, wherein when any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path.
In the above method, the identifier is a wildcard identifier, and the respectively configuring, according to the pre-established correspondence between the file systems and the identifiers, the corresponding identifier for the storage path of each file in each file system includes:
and respectively adding corresponding wildcards at the starting position of the storage path of each file in each file system.
In the above method, the identifier is a prefix tree, and the configuring, according to a pre-established correspondence between file systems and identifiers, a corresponding identifier for a storage path of each file in each file system respectively includes:
and respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system.
In the above method, the identifier is a suffix tree, and the configuring, according to a pre-established correspondence between file systems and identifiers, a corresponding identifier for a storage path of each file in each file system respectively includes:
and adding a corresponding suffix tree at the end position of the storage path of each file in each file system respectively.
The method as described above, further comprising:
when a file system is added, a corresponding identifier is created for the added file system, and the corresponding relationship between the added file system and the identifier is added in the corresponding relationship between the file system and the identifier.
According to a second aspect of the embodiments of the present disclosure, there is provided a processing apparatus of a file system, including:
the reading module is used for reading and loading the corresponding relation between the file systems and the identifiers;
the acquisition module is used for respectively acquiring storage paths of the files in the file systems;
and the processing module is used for respectively matching the corresponding identifiers for the storage paths of the files in each file system according to the corresponding relations between the file systems and the identifiers, wherein when any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path.
The apparatus as described above, wherein the identifier is a wildcard, and the processing module is configured to:
and respectively adding corresponding wildcards at the starting position of the storage path of each file in each file system.
The apparatus as described above, where the identifier is a prefix tree, and the processing module is configured to:
and respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system.
The apparatus as described above, the identifier being a suffix tree, the processing module to:
and adding a corresponding suffix tree at the end position of the storage path of each file in each file system respectively.
The apparatus as described above, further comprising:
and the updating module is used for creating a corresponding identifier for the newly added file system when the file system is newly added, and adding the corresponding relationship between the newly added file system and the identifier in the corresponding relationship between the file system and the identifier.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the storage paths of the files in the file systems are respectively obtained by reading and loading the corresponding relations between the file systems and the identifiers, and the corresponding identifiers are respectively matched for the storage paths of the files in each file system according to the corresponding relations between the file systems and the identifiers, wherein when any file is accessed, the corresponding file in the file system is accessed according to the identifier matched with the storage path, so that the storage paths of the files in each file system are easily matched according to the load condition of the files through flexible matching of the identifiers, the relative balance of data quantity among the file systems is ensured, the configuration is simple, and the management and the operation and maintenance are easy.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow diagram illustrating a method of processing a file system in accordance with an exemplary embodiment.
FIG. 2 is a flow diagram illustrating a method of processing a file system in accordance with an exemplary embodiment.
FIG. 3 is a block diagram illustrating a processing device of a file system in accordance with an exemplary embodiment.
FIG. 4 is a block diagram illustrating a processing device of a file system in accordance with an exemplary embodiment.
FIG. 5 is a block diagram illustrating a processing device of a file system in accordance with an exemplary embodiment.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments. .
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
With the continuous richness and the strong functions of various intelligent devices, files in an operating system of the intelligent device are richer and richer. In order to manage and use the multiple file systems, the multiple operating systems need to be incorporated into a unified global namespace (nameapace), so that users of the intelligent device can access and use the multiple independent file systems through the unified file system.
The file system is a method and a data structure used by an operating system for defining files on a storage device (a magnetic disk is common and a solid state hard disk based on NAND Flash) or a partition; i.e. a method of organizing files on a storage device. The software mechanism in the operating system that is responsible for managing and storing file information is called a file management system, referred to as a file system for short.
Currently, multiple file systems can be incorporated into a unified global namespace by the following scheme.
For example, a client uses a mount point table (mount point table) to map different directories into different file systems. This approach can result in a high imbalance of data volumes between file systems, resulting in wasted space and increased storage and operation and maintenance costs.
For example, by performing a hash (hash) calculation on the file path and mapping the file into a different file system by the obtained hash value. In such a scheme, when a file system is added, hash (rehash) is required, and a large amount of data needs to be copied between file systems, which is time-consuming and labor-consuming. If external services are required during copying, the complexity of system implementation can rise dramatically, greatly increasing maintenance costs.
For example, other file systems are invoked within a single file system by creating a special jump file (join point). However, as the jump file is also a file, once misoperation occurs, the data is easy to be inconsistent and is difficult to repair. At the same time, rights management becomes more difficult. Overall, the cost of management and maintenance is relatively high.
Fig. 1 is a flowchart illustrating a processing method of a file system, which is used in a terminal as shown in fig. 1, according to an exemplary embodiment, and includes the following steps.
In step S11, the correspondence of the plurality of file systems and the identifiers is read and loaded.
In step S12, storage paths of files in the plurality of file systems are acquired, respectively.
In step S13, according to the correspondence between the file systems and the identifiers, the corresponding identifiers are respectively matched for the storage paths of the files in each file system. When any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path.
Specifically, the identifier in the target storage path may be matched with the correspondence between the plurality of file systems and the identifier, so as to determine and access the file system corresponding to the target storage path.
In some embodiments of the present disclosure, the identifier may include a regular expression wildcard, a prefix tree, a suffix tree, a regular expression, and the like.
The correspondence between the file systems and the identifiers is pre-established and can be stored in a highly available system or server, such as ZooKeeper (a distributed application coordination service) or etcd (a service discovery repository). The terminal or the equipment terminal can acquire the corresponding relation between the file systems and the identifiers based on the communication with the system or the server, and the corresponding relation is loaded into the memory and can be updated at any time.
In some embodiments of the present disclosure, the identifier may be a wildcard, and configuring the corresponding identifier for the storage path of the file in each file system according to the pre-established correspondence between the file system and the identifier in step S13 may include:
and respectively adding corresponding wildcards at the starting position of the storage path of each file in each file system.
The wildcard is a special sentence, which may be a keyboard character, and may include an asterisk (#) and a question mark (. When looking up a folder, it can be used instead of one or more real characters; when the real character is not known or is lazy to enter a full name, wildcards are often used in place of one or more of the real characters. The wildcard is also a common technology, the learning cost is low, and the maintenance is easy.
The correspondence of the file system and the identifier may be in the form of a mapping table. For example, the following form may be used:
the file system A is/user/A/- > file system A;
and/user/B/> file system B.
In some embodiments of the present disclosure, the identifier may be a prefix tree, and the configuring, in step S13, corresponding identifiers for the storage paths of the files in each file system according to the pre-established correspondence between the file systems and the identifiers includes:
and respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system.
In some embodiments of the present disclosure, the identifier may be a suffix tree, and the configuring, according to the pre-established correspondence between the file systems and the identifiers in step S13, the corresponding identifiers for the storage paths of the files in each file system respectively includes:
and adding a corresponding suffix tree at the end position of the storage path of each file in each file system respectively.
In some embodiments of the present disclosure, the identifier may be a regular expression.
It should be noted that the wildcards themselves can be regarded as a subset of regular expressions. The regular expression is more powerful than a wildcard, but the regular expression is more complex and higher in learning and maintenance cost, so that the wildcard or the regular expression can be selected and used as required in practical application.
When the client needs to access the target access file, the corresponding access path (i.e. the storage path of the target file, which may be referred to as a target storage path) may be compared and matched with the corresponding relationship between the file system and the identifier, so as to find the corresponding file system for access.
According to the processing method of the file system, the corresponding relations between the file systems and the identifiers are read and loaded, the storage paths of the files in the file systems are respectively obtained, the corresponding identifiers are respectively matched for the storage paths of the files in each file system according to the corresponding relations between the file systems and the identifiers, when any file is accessed, the corresponding file in the file system is accessed according to the identifier matched with the storage path, and therefore the storage paths of the files in the file systems are easily matched according to the load condition of the files through flexible matching of the identifiers, so that the relative balance of data quantity among the file systems is guaranteed, the configuration is simple, and management and operation and maintenance are easy.
FIG. 2 is a flow diagram illustrating a method of processing a file system in accordance with an exemplary embodiment.
In step S21, the correspondence of the plurality of file systems and the identifiers is read and loaded.
In step S22, storage paths of files in the plurality of file systems are acquired, respectively.
In step S23, according to the correspondence between the file systems and the identifiers, the corresponding identifiers are respectively matched for the storage paths of the files in each file system, wherein when any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path.
In step S24, when a file system is added, a corresponding identifier is created for the added file system, and the correspondence between the added file system and its corresponding identifier is added to the correspondence between the file system and the identifier.
The explanation of steps S21-S23 can refer to steps S11-S13 in the embodiment of FIG. 1.
According to the processing method of the file system provided by the embodiment of the disclosure, when the file system is newly added, the identifier corresponding to the newly added file system can be created and added, and the new configuration item of the corresponding relationship between the newly added file system and the identifier corresponding to the newly added file system is added in the corresponding relationship between the file system and the identifier to map a new file to the new file system, so that old data does not need to be copied, the operation is convenient and simple, and the management and maintenance cost is reduced.
Fig. 3 is a block diagram illustrating a processing method apparatus of a file system according to an example embodiment. Referring to fig. 3, the apparatus includes a reading module 131, an obtaining module 132, and a processing module 133.
The reading module 131 is configured to read and load a plurality of file system and identifier correspondences.
The obtaining module 132 is configured to obtain storage paths of files in a plurality of file systems, respectively.
The processing module 133 is configured to match the corresponding identifier for the storage path of the file in each file system according to the correspondence between the file systems and the identifiers. When any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path.
In some embodiments of the present disclosure, the identifier may be a wildcard, and the processing module 133 may be configured to: and respectively adding corresponding wildcards at the starting position of the storage path of each file in each file system.
In some embodiments of the present disclosure, the identifier may be a prefix tree, and the processing module 133 may be configured to: and respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system.
In some embodiments of the present disclosure, the identifier may be a suffix tree, and the processing module 133 may be configured to: and adding a corresponding suffix tree at the end position of the storage path of each file in each file system respectively.
In some embodiments of the present disclosure, the identifier may be a regular expression.
The processing device of the file system provided by the embodiment of the disclosure obtains the storage paths of the files in the file systems respectively by reading and loading the corresponding relations between the file systems and the identifiers, and matches the corresponding identifiers for the storage paths of the files in each file system respectively according to the corresponding relations between the file systems and the identifiers, wherein when any file is accessed, the file in the corresponding file system is accessed according to the identifier matched with the storage path, so that the storage paths of the files in each file system are easily matched according to the load condition of the file through flexible matching of the identifiers, so that the relative balance of data quantity among the file systems is ensured, the configuration is simple, and the management and the operation and maintenance are easy.
Fig. 4 is a block diagram illustrating a processing method apparatus of a file system according to an example embodiment. Referring to fig. 4, the apparatus includes a reading module 131, an obtaining module 132, a processing module 133, and an updating module 141.
The updating module 141 is configured to create a corresponding identifier for a newly added file system when the file system is newly added, and add the correspondence between the newly added file system and the identifier to the correspondence between the file system and the identifier.
When a file system is newly added, the processing device of the file system provided by the embodiment of the disclosure can map a new file to the new file system by creating and adding the identifier corresponding to the newly added file system and adding the new configuration item of the corresponding relationship between the newly added file system and the identifier corresponding to the newly added file system in the corresponding relationship between the file system and the identifier, without copying old data, and is convenient and simple to operate, thereby reducing the cost of management and maintenance.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 5 is a block diagram illustrating a processing device 500 of a file system in accordance with an exemplary embodiment. For example, the apparatus 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 5, the apparatus 500 may include one or more of the following components: processing component 502, memory 504, power component 506, multimedia component 508, audio component 510, input/output (I/O) interface 512, sensor component 514, and communication component 516.
The processing component 502 generally controls overall operation of the device 500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 502 may include one or more processors 520 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 502 can include one or more modules that facilitate interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.
The memory 504 is configured to store various types of data to support operation at the device 500. Examples of such data include instructions for any application or method operating on device 500, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 504 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 506 provides power to the various components of the device 500. The power components 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 500.
The multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 500 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 510 is configured to output and/or input audio signals. For example, audio component 510 includes a Microphone (MIC) configured to receive external audio signals when apparatus 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 504 or transmitted via the communication component 516. In some embodiments, audio component 510 further includes a speaker for outputting audio signals.
The I/O interface 512 provides an interface between the processing component 502 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 514 includes one or more sensors for providing various aspects of status assessment for the device 500. For example, the sensor assembly 514 may detect an open/closed state of the device 500, the relative positioning of the components, such as a display and keypad of the apparatus 500, the sensor assembly 514 may also detect a change in the position of the apparatus 500 or a component of the apparatus 500, the presence or absence of user contact with the apparatus 500, orientation or acceleration/deceleration of the apparatus 500, and a change in the temperature of the apparatus 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 516 is configured to facilitate communication between the apparatus 500 and other devices in a wired or wireless manner. The apparatus 500 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 504 comprising instructions, executable by the processor 520 of the apparatus 500 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (5)
1. A method for processing a file system, comprising:
reading and loading a plurality of pre-established corresponding relations between the file systems and the identifiers; respectively acquiring storage paths of files in the file systems;
according to the corresponding relation between the file systems and the identifiers, respectively matching the corresponding identifiers for the storage paths of the files in each file system, wherein when a target file is accessed, according to the identifiers matched with the storage paths of the target file, the file system to which the target file belongs is determined from the corresponding relation between the file systems and the identifiers, and the target file is accessed; the identifier is any one of wildcard, prefix tree, suffix tree and regular expression;
the matching of the corresponding identifier for the storage path of the file in each file system according to the corresponding relationship between the file system and the identifier includes:
if the identifier is a wildcard, respectively adding a corresponding wildcard at the initial position of the storage path of each file in each file system;
if the identifier is a prefix tree, respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system;
and if the identifier is a suffix tree, adding a corresponding suffix tree at the end position of the storage path of each file in each file system.
2. The method of claim 1, further comprising:
when a file system is added, a corresponding identifier is created for the added file system, and the corresponding relationship between the added file system and the identifier is added in the corresponding relationship between the file system and the identifier.
3. A processing apparatus of a file system, comprising:
the reading module is used for reading and loading the corresponding relation between a plurality of pre-established file systems and the identifiers;
the acquisition module is used for respectively acquiring storage paths of the files in the file systems;
the processing module is used for respectively matching corresponding identifiers for the storage paths of the files in each file system according to the corresponding relations between the file systems and the identifiers, wherein when a target file is accessed, the file system to which the target file belongs is determined from the corresponding relations between the file systems and the identifiers according to the identifiers matched with the storage paths of the target file, and the target file is accessed; the identifier is any one of wildcard, prefix tree, suffix tree and regular expression;
the processing module is used for:
if the identifier is a wildcard, respectively adding a corresponding wildcard at the initial position of the storage path of each file in each file system;
if the identifier is a prefix tree, respectively adding a corresponding prefix tree at the initial position of the storage path of each file in each file system;
and if the identifier is a suffix tree, adding a corresponding suffix tree at the end position of the storage path of each file in each file system.
4. The apparatus of claim 3, further comprising:
and the updating module is used for creating a corresponding identifier for the newly added file system when the file system is newly added, and adding the corresponding relationship between the newly added file system and the identifier in the corresponding relationship between the file system and the identifier.
5. A computer-readable storage medium, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1-2.
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| CN108351860A (en) * | 2015-11-20 | 2018-07-31 | 微软技术许可有限责任公司 | The distributed storage devices based on RDMA of low latency |
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| CN102419770A (en) * | 2011-11-23 | 2012-04-18 | 中兴通讯股份有限公司 | File sharing system, method for realizing file sharing, and file index service equipment |
| CN108351860A (en) * | 2015-11-20 | 2018-07-31 | 微软技术许可有限责任公司 | The distributed storage devices based on RDMA of low latency |
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