CN105095354A - Data updating method and data updating device - Google Patents

Abstract

The invention discloses a data updating method and a data updating device. The data updating method comprises the following steps: writing updated data in an updated cache; storing the updated data in the updated cache in a storage to backup; and switching between the updated cache and a used cache, switching the original updated cache into the used cache, and switching the original used cache into the updated cache. The data updating method and the data updating device disclosed by the invention have the benefits that: the problem of slow data updating speed is solved; the data updating speed is increased; and thus, the service interruption time is reduced.

Description

Method and device for updating data

technical field

The invention relates to communication technology, in particular to a method and device for updating data.

Background technique

With the development of web crawler crawling technology, data can be obtained from the Internet in real time, and related businesses can be carried out using these data. How to update the used data to real-time Internet data has become a problem to be solved.

In the prior art, the acquired data in the Internet is stored in a hard disk storage, and the hard disk storage is used for data update. For example, store the updated data in the hard disk, and then read the updated data into the cache, and use the data in the cache to complete tasks in specific applications. The defect of this method is that, due to the limitation of the reading speed of the hard disk memory, the data updating speed is relatively slow.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a data updating method and device for overcoming the above problems or at least partially solving the above problems.

According to one aspect of the present invention, a method for updating data is provided, the method comprising:

Write the update data into the update cache;

storing the update data in the update cache into a memory for backup;

Switch between update cache and use cache, switch the original update cache to use cache, and switch the original use cache to update cache.

Optionally, the switching between updating the cache and using the cache specifically includes:

The pointer of the update cache is exchanged with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

Optionally, the update cache has an update lock, and the method further includes:

When switching between updating the cache and using the cache, the update lock is locked to prohibit writing operations on the update cache.

Optionally, the method also includes:

After the switch between updating the cache and using the cache is completed, the update lock is unlocked to allow writing operations on the update cache.

Optionally, the locking the update lock to prohibit writing operations on the update cache specifically includes:

Lock the update lock of the update cache;

When the write request to the update cache sent by the process is received, it is determined that the state of the update lock of the update cache is locked;

Instructs the process sending the write request to wait.

Optionally, the unlocking the update lock to allow the write operation to the update cache specifically includes:

Unlock the update lock of the update cache;

Assign the update lock to the process sending the write request, make the process write the update cache, and lock the update lock;

After the process completes the write operation, the update lock is unlocked.

Optionally, the use cache has a toggle lock, and the method further includes:

When switching between updating the cache and using the cache, the switching lock is locked to prohibit reading operations on the using cache.

Optionally, the method also includes:

After the switching between updating the cache and using the cache is completed, the switching lock is unlocked to allow a read operation on the using cache.

Optionally, the locking the switching lock to prohibit the read operation of the usage cache specifically includes:

Lock the toggle lock using the cache;

When receiving the read request sent by the process to use the cache, it is determined that the status of the switching lock using the cache is locked;

Instructs the process sending the read request to wait.

Optionally, the unlocking the switching lock to allow a read operation on the usage cache specifically includes:

Unlock the toggle lock using the cache;

Assign the switch lock to the process that sends the read request, make the process use the cache read operation, and lock the switch lock;

After the process completes the read operation, the toggle lock is unlocked.

According to another aspect of the present invention, a device for updating data is provided, the device comprising:

A write module, adapted to write update data into the update cache;

A backup module, adapted to store the update data in the update cache in the memory for backup;

The switch module is suitable for switching between the update cache and the use cache, switching the original update cache to the use cache, and switching the original use cache to the update cache.

Optionally, the switching module is specifically adapted to exchange the pointer of the update cache with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

Optionally, the update cache has an update lock, and the device further includes:

The locking module is adapted to lock the update lock when switching between updating the cache and using the cache, so as to prohibit writing operations on the update cache.

Optionally, the device also includes:

The unlocking module is adapted to unlock the update lock after the switch between the update cache and the use cache is completed, so as to allow writing operations on the update cache.

Optionally, the locking module specifically includes:

The locking submodule is suitable for locking the update lock of the update cache when switching between updating the cache and using the cache;

The judging submodule is adapted to determine that the state of the update lock of the update cache is locked when receiving the write request sent by the process to the update cache;

The indication submodule is adapted to instruct the process sending the write request to wait.

Optionally, the unlocking module specifically includes:

The first unlocking submodule is adapted to unlock the update lock of the update cache after the switch between the update cache and the use cache is completed;

The allocation submodule is adapted to assign the update lock to the process sending the write request, so that the process performs a write operation on the update cache and locks the update lock;

The second unlocking submodule is adapted to unlock the update lock after the process completes the write operation.

Optionally, the use cache has a toggle lock, and the device further includes:

The locking module is adapted to lock the switching lock when switching between updating the cache and using the cache, so as to prohibit reading operations on the using cache.

Optionally, the device also includes:

The unlocking module is adapted to unlock the switch lock after the switching between the update cache and the use cache is completed, so as to allow the read operation on the use cache.

Optionally, the locking module specifically includes:

The locking sub-module is suitable for locking the switching lock of the cache when switching between updating the cache and using the cache;

The judging submodule is adapted to determine that the state of the switching lock using the cache is locked when a read request for using the cache is received from the process;

The indication submodule is adapted to instruct the process sending the read request to wait.

Optionally, the unlocking module specifically includes:

The first unlocking sub-module is suitable for unlocking the switching lock of the cache when the switch between the update cache and the cache is completed;

The distribution submodule is suitable for distributing the switch lock to the process sending the read request, so that the process performs a read operation on the use cache and locks the switch lock;

The second unlocking submodule is adapted to unlock the switching lock after the process completes the read operation.

According to the technical solution of the present invention, the update data can be written into the update cache, the update data in the update cache can be stored in the memory for backup, the update cache and the use cache can be switched, the original update cache can be switched to the use cache, and the update cache can be switched to the use cache. Switch from using cache to update cache. In this way, the update data is backed up in the memory to ensure that the update data will not be lost, and the data update is completed by switching between the update cache and the use cache, so that the update speed is significantly improved, thus solving the problem of slow data update speed , which has the beneficial effect of increasing the data update speed and reducing the service interruption time.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 shows the flowchart of the method for updating data according to one embodiment of the present invention;

FIG. 2 shows a flow chart of a method for prohibiting writing operations to an update cache according to an embodiment of the present invention;

FIG. 3 shows a flow chart of a method for allowing a write operation to an update cache according to an embodiment of the present invention;

FIG. 4 shows a flow chart of a method for prohibiting a read operation on a usage cache according to an embodiment of the present invention;

FIG. 5 shows a flowchart of a method for allowing a read operation to use a cache according to an embodiment of the present invention;

FIG. 6 shows a flowchart of a method for updating data according to an embodiment of the present invention;

FIG. 7 shows a structural diagram of a device for updating data according to an embodiment of the present invention;

FIG. 8 shows a structural diagram of a device for updating data according to an embodiment of the present invention; and

Fig. 9 shows a structural diagram of an apparatus for updating data according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

Fig. 1 shows a flowchart of a method for updating data according to an embodiment of the present invention, and the method can be used in various devices, such as various service servers of service providers in the network, and various terminals. As shown in Fig. 1, the method includes the following steps S110-S130.

In step S110, update data is written into the update cache.

For example, the server receives the update data sent by the device where the data source is located, and the server writes the update data into the update cache. When the updated data written reaches the preset number. For example, when the update cache is full, a subsequent step of switching between updating the cache and using the cache is performed.

In step S120, the update data in the update cache is stored in the memory for backup.

For example, the update data in the update cache is stored in the hard disk of the device for backup, so as to avoid the loss of update data due to a failure when switching between updating the cache and using the cache.

In step S130, switch between the updated cache and the used cache, switch the original updated cache to the used cache, and switch the original used cache to the updated cache.

In an embodiment, the switching between the update cache and the use cache specifically includes: exchanging the pointer of the update cache with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache .

In this embodiment, by exchanging pointers between the update cache and the use cache, the switch between the update cache and the use cache is realized, thereby completing the data update, so that the service can use the updated data to provide services for users in a timely manner. The adoption of this data update method significantly increases the update speed, thereby solving the problem of slow data update speed and achieving the beneficial effects of increasing the data update speed and reducing service interruption time.

In an embodiment, the update cache has an update lock, and the method further includes: when switching between updating the cache and using the cache, locking the update lock to prohibit writing operations on the update cache.

Further, the method further includes: after the switch between updating the cache and using the cache is completed, unlocking the update lock to allow writing operations on the update cache.

For example, when a process performs a write operation on the update cache, the process obtains an update lock in an unlocked state, sets the update lock state to locked, and performs a write operation on the update cache. When other processes want to write to the update cache, the query finds that the update lock status is locked, and waits. After the update lock status is unlocked, the waiting process obtains the update lock in the unlocked status, sets the update lock status to locked, and Write operations to the update cache. In this way, when switching between updating the cache and using the cache, the update lock is locked, thereby prohibiting the write operation on the update cache. After the switch between updating the cache and using the cache is completed, the update lock is unlocked to allow writing operations on the update cache.

For example, as shown in FIG. 2 , the locking of the update lock to prohibit writing operations on the update cache may include the following steps S210-S230.

In step S210, the update lock for updating the cache is locked.

In step S220, when a write request to the update cache sent by the process is received, it is determined that the status of the update lock of the update cache is locked.

In step S230, instruct the process sending the write request to wait.

For another example, as shown in FIG. 3 , unlocking the update lock to allow the write operation to the update cache may include the following steps S310-S330.

In step S310, the update lock for updating the cache is unlocked.

In step S320, the update lock is assigned to the process sending the write request, so that the process performs a write operation on the update cache and locks the update lock.

In step S330, after the process completes the write operation, the update lock is unlocked.

In this embodiment, by updating the update lock of the cache, it is ensured that no process writes to the update cache when switching between the update cache and the use cache, thereby ensuring the stability of data in the update cache.

In an embodiment, the use cache has a switching lock, and the method further includes: when switching between updating the cache and using the cache, locking the switch lock to prohibit reading operations on the use cache.

Further, the method further includes: after the switching between the update cache and the use cache is completed, unlocking the switch lock to allow the read operation on the use cache.

For example, when a process performs a read operation on the use cache, the process obtains a switch lock in an unlocked state, sets the switch lock state to locked, and performs a read operation on the use cache. When other processes want to read the cache, the query finds that the switching lock status is locked, and waits until the switching lock status is unlocked, the waiting process obtains the switching lock in the unlocked state, sets the switching lock status to locked, and Use the cache for read operations. In this way, when switching between updating the cache and using the cache, the switching lock is locked, thereby prohibiting the read operation on the using cache. After the switch between updating the cache and using the cache is completed, the switch lock is unlocked to allow read operations on the using cache.

For example, as shown in FIG. 4 , the locking the switching lock to prohibit the read operation on the cache may include the following steps S410-S430.

In step S410, the cached switching lock is locked.

In step S420, when a read request for using the cache is received from the process, it is determined that the status of the switch lock for using the cache is locked.

In step S430, instruct the process sending the read request to wait.

For another example, as shown in FIG. 5 , unlocking the switching lock to allow a read operation on the usage cache may include the following steps S510-S530.

In step S510, the cached switching lock is unlocked.

In step S520, the switch lock is allocated to the process that sends the read request, so that the process performs a read operation on the usage cache and locks the switch lock.

In step S530, after the process completes the read operation, the switching lock is unlocked.

In this embodiment, by using the switching lock of the cache, it is ensured that no process performs a read operation on the cache when switching between updating the cache and using the cache, thereby ensuring the stability of data in the cache.

Fig. 6 shows a flow chart of a method for updating data according to an embodiment of the present invention, and the method can be used in various servers, such as various service servers of service providers in the network. As shown in Fig. 6, the method includes the following steps S602-S610. Among them, the update cache has an update lock, and the use cache has a switch lock.

In step S602, update data is written into the update cache.

In step S604, the update data in the update cache is stored in the memory for backup.

In step S606, the update lock is locked to prohibit the write operation on the update cache, and the switching lock is locked to prohibit the read operation on the use cache.

In step S608, the pointer of the update cache is exchanged with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

In step S610, after the switch between the update cache and the use cache is completed, the update lock is unlocked to allow writing operations to the update cache, and the switching lock is unlocked to allow read operations to the use cache.

In this embodiment, by exchanging pointers between the update cache and the use cache, the switch between the update cache and the use cache is realized, thereby completing the data update, so that the service can use the updated data to provide services for users in a timely manner. The adoption of this data update method significantly increases the update speed, thereby solving the problem of slow data update speed and achieving the beneficial effects of increasing the data update speed and reducing service interruption time.

The foregoing is only an example description of the method for updating data in the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the spirit or principle of the present invention are included in the protection scope of the present invention.

Fig. 7 shows a structural diagram of an apparatus for updating data according to an embodiment of the present invention, and the apparatus can be used in various devices, such as various service servers of service providers in the network, and various terminals. As shown in Figure 7, the device includes the following modules.

A write module 710, adapted to write update data into the update cache;

The backup module 720 is adapted to store the update data in the update cache in the memory for backup;

The switching module 730 is adapted to switch between the update cache and the use cache, switching the original update cache to the use cache, and switching the original use cache to the update cache.

In one embodiment, the switching module 730 is specifically adapted to exchange the pointer of the update cache with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

In one embodiment, as shown in FIG. 8, the update cache has an update lock, and the device also includes:

The lock module 810 is adapted to lock the update lock when switching between updating the cache and using the cache, so as to prohibit writing operations on the update cache.

In one embodiment, as shown in Figure 8, the device further includes:

The unlocking module 820 is adapted to unlock the update lock after the switch between the update cache and the use cache is completed, so as to allow writing operations on the update cache.

In one embodiment, as shown in FIG. 9, the locking module 810 specifically includes:

The locking submodule 812 is adapted to lock the update lock of the update cache when switching between updating the cache and using the cache;

The determination submodule 814 is adapted to determine that the state of the update lock of the update cache is locked when receiving the write request sent by the process to the update cache;

The instructing submodule 816 is adapted to instruct the process sending the write request to wait.

In one embodiment, as shown in FIG. 9, the unlocking module 820 specifically includes:

The first unlocking submodule 822 is adapted to unlock the update lock of the update cache after the switch between the update cache and the use cache is completed;

The allocation submodule 824 is adapted to allocate the update lock to the process sending the write request, so that the process performs a write operation on the update cache and locks the update lock;

The second unlocking submodule 826 is adapted to unlock the update lock after the process completes the write operation.

In one embodiment, as shown in FIG. 8, the cache is used to switch locks, and the device further includes:

The locking module 810 is adapted to lock the switching lock when switching between updating the cache and using the cache, so as to prohibit reading operations on the using cache.

The locking module 810 may have the functions of locking the update lock for updating the cache and the switching lock for using the cache respectively, or may simultaneously have the functions of locking the update lock for updating the cache and the switching lock for using the cache.

In one embodiment, as shown in Figure 8, the device further includes:

The unlocking module 820 is adapted to unlock the switch lock after the switch between the update cache and the use cache is completed, so as to allow the read operation on the use cache.

The unlocking module 820 may have the functions of unlocking the update lock for updating the cache and unlocking the switching lock for using the cache respectively, or may simultaneously have the functions of unlocking the update lock for updating the cache and unlocking the switching lock for using the cache.

In one embodiment, as shown in FIG. 9, the locking module 810 specifically includes:

The locking submodule 812 is adapted to lock the switching lock of the cache when switching between updating the cache and using the cache;

The judging submodule 814 is adapted to determine that the state of the switching lock using the cache is locked when receiving a read request sent by the process for using the cache;

The instructing submodule 816 is adapted to instruct the process sending the read request to wait.

In one embodiment, as shown in FIG. 9, the unlocking module 820 specifically includes:

The first unlocking submodule 822 is adapted to unlock the switch lock for using the cache after the switch between updating the cache and using the cache is completed;

The allocation submodule 824 is adapted to assign the switch lock to the process sending the read request, so that the process can perform a read operation on the use cache and lock the switch lock;

The second unlocking submodule 826 is adapted to unlock the switching lock after the process completes the read operation.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

The invention discloses the following technical solutions.

A1, a method for updating data, said method comprising:

Write the update data into the update cache;

storing the update data in the update cache into a memory for backup;

Switch between update cache and use cache, switch the original update cache to use cache, and switch the original use cache to update cache.

A2. The method according to A1, wherein the switching between updating the cache and using the cache specifically includes:

The pointer of the update cache is exchanged with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

A3. The method according to A1, wherein the update cache has an update lock, and the method also includes:

When switching between updating the cache and using the cache, the update lock is locked to prohibit writing operations on the update cache.

A4. The method according to A3, wherein the method also includes:

After the switch between updating the cache and using the cache is completed, the update lock is unlocked to allow writing operations on the update cache.

A5. The method according to A3, wherein the locking the update lock to prohibit writing to the update cache specifically includes:

Lock the update lock of the update cache;

When the write request to the update cache sent by the process is received, it is determined that the state of the update lock of the update cache is locked;

Instructs the process sending the write request to wait.

A6. The method according to A4, wherein the unlocking the update lock to allow the write operation to the update cache specifically includes:

Unlock the update lock of the update cache;

Assign the update lock to the process sending the write request, make the process write the update cache, and lock the update lock;

After the process completes the write operation, the update lock is unlocked.

A7. The method according to A1, wherein the use of the cache has a switching lock, and the method also includes:

When switching between updating the cache and using the cache, the switching lock is locked to prohibit reading operations on the using cache.

A8. The method according to A7, wherein the method also includes:

After the switching between updating the cache and using the cache is completed, the switching lock is unlocked to allow a read operation on the using cache.

A9. The method according to A7, wherein the locking the switching lock to prohibit the read operation of the usage cache specifically includes:

Lock the toggle lock using the cache;

When receiving the read request sent by the process to use the cache, it is determined that the status of the switching lock using the cache is locked;

Instructs the process sending the read request to wait.

A10. The method according to A8, wherein the unlocking the switching lock to allow a read operation on the usage cache specifically includes:

Unlock the toggle lock using the cache;

Assign the switch lock to the process that sends the read request, make the process use the cache read operation, and lock the switch lock;

After the process completes the read operation, the toggle lock is unlocked.

B11, a device for updating data, said device comprising:

A write module, adapted to write update data into the update cache;

A backup module, adapted to store the update data in the update cache in the memory for backup;

The switch module is suitable for switching between the update cache and the use cache, switching the original update cache to the use cache, and switching the original use cache to the update cache.

B12. The device according to B11, wherein the switching module is specifically adapted to exchange the pointer of the update cache with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache.

B13. The device according to B11, wherein the update cache has an update lock, and the device also includes:

The locking module is adapted to lock the update lock when switching between updating the cache and using the cache, so as to prohibit writing operations on the update cache.

B14. The device according to B13, wherein the device also includes:

The unlocking module is adapted to unlock the update lock after the switch between the update cache and the use cache is completed, so as to allow writing operations on the update cache.

B15. The device according to B13, wherein the locking module specifically includes:

The locking submodule is suitable for locking the update lock of the update cache when switching between updating the cache and using the cache;

The judging submodule is adapted to determine that the state of the update lock of the update cache is locked when receiving the write request sent by the process to the update cache;

The indication submodule is adapted to instruct the process sending the write request to wait.

B16. The device according to B14, wherein the unlocking module specifically includes:

The first unlocking submodule is adapted to unlock the update lock of the update cache after the switch between the update cache and the use cache is completed;

The allocation submodule is adapted to assign the update lock to the process sending the write request, so that the process performs a write operation on the update cache and locks the update lock;

The second unlocking submodule is adapted to unlock the update lock after the process completes the write operation.

B17. The device according to B11, wherein the use cache has a switching lock, and the device also includes:

The locking module is adapted to lock the switching lock when switching between updating the cache and using the cache, so as to prohibit reading operations on the using cache.

B18. The device according to B17, wherein the device also includes:

The unlocking module is adapted to unlock the switch lock after the switching between the update cache and the use cache is completed, so as to allow the read operation on the use cache.

B19. The device according to B17, wherein the locking module specifically includes:

The locking sub-module is suitable for locking the switching lock of the cache when switching between updating the cache and using the cache;

The judging submodule is adapted to determine that the state of the switching lock using the cache is locked when a read request for using the cache is received from the process;

The indication submodule is adapted to instruct the process sending the read request to wait.

B20. The device according to B18, wherein the unlocking module specifically includes:

The first unlocking sub-module is suitable for unlocking the switching lock of the cache when the switch between the update cache and the cache is completed;

The distribution submodule is suitable for distributing the switch lock to the process sending the read request, so that the process performs a read operation on the use cache and locks the switch lock;

The second unlocking submodule is adapted to unlock the switching lock after the process completes the read operation.

It should be noted:

The algorithms and displays presented herein are not inherently related to any particular computer, virtual appliance, or other device. Various general purpose devices can also be used with the teachings based on this. The structure required to construct such an apparatus will be apparent from the foregoing description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the content of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components in the data updating device according to the embodiment of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims (10)

1. A method for data update, said method comprising: Write the update data into the update cache; storing the update data in the update cache into a memory for backup; Switch between update cache and use cache, switch the original update cache to use cache, and switch the original use cache to update cache. 2. The method according to claim 1, wherein the switching between updating the cache and using the cache specifically comprises: The pointer of the update cache is exchanged with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache. 3. The method according to claim 1, wherein the update cache has an update lock, the method further comprising: When switching between updating the cache and using the cache, the update lock is locked to prohibit writing operations on the update cache. 4. The method of claim 3, wherein the method further comprises: After the switch between updating the cache and using the cache is completed, the update lock is unlocked to allow writing operations on the update cache. 5. The method according to claim 3, wherein the locking the update lock to prohibit writing operations to the update cache specifically comprises: Lock the update lock of the update cache; When the write request to the update cache sent by the process is received, it is determined that the state of the update lock of the update cache is locked; Instructs the process sending the write request to wait. 6. A device for updating data, said device comprising: A write module, adapted to write update data into the update cache; A backup module, adapted to store the update data in the update cache in the memory for backup; The switch module is suitable for switching between the update cache and the use cache, switching the original update cache to the use cache, and switching the original use cache to the update cache. 7. The device according to claim 6, wherein the switching module is specifically adapted to exchange the pointer of the update cache with the pointer of the use cache, so that the original update cache is switched to the use cache, and the original use cache is switched to the update cache . 8. The apparatus according to claim 6, wherein the update cache has an update lock, the apparatus further comprising: The locking module is adapted to lock the update lock when switching between updating the cache and using the cache, so as to prohibit writing operations on the update cache. 9. The apparatus of claim 8, wherein the apparatus further comprises: The unlocking module is adapted to unlock the update lock after the switch between the update cache and the use cache is completed, so as to allow writing operations on the update cache. 10. The device according to claim 8, wherein the locking module specifically comprises: The locking submodule is suitable for locking the update lock of the update cache when switching between updating the cache and using the cache; The judging submodule is adapted to determine that the state of the update lock of the update cache is locked when receiving the write request sent by the process to the update cache; The indication submodule is adapted to instruct the process sending the write request to wait.