CN108614746A - A kind of data processing method and its system, server - Google Patents

Abstract

The embodiment of the present invention discloses a data processing method, comprising: the server receives a data request for target data; the server is provided with at least one local hard disk and connected with an external storage device; and determining a response to the data request strategy; the response strategy includes at least a first strategy and a second strategy; wherein, under the first strategy, the server uses the target hard disk in the at least one local hard disk set by itself to respond to the data request and respond to the data request process the target data; under the second policy, the server uses the external storage device to respond to the data request and process the target data. The embodiment of the invention also discloses a server and a data processing system.

Description

A kind of data processing method and its system, server

technical field

The invention relates to data processing technology, in particular to a data processing method, system and server thereof.

Background technique

With the rise of big data, the demand for cluster scale and stand-alone storage capacity is getting higher and higher. In order to achieve the largest possible capacity in the limited chassis space, the number of hard disks in the chassis is constantly increasing. However, in order to achieve data security, It is still necessary to form different levels of disk arrays (Raid, Redundant Arrays of Independent Disks) through hard disks. The current Raid schemes are all implemented on the hard disks in a physical server. Although this ensures the reliability of data, it does not The limited hard disk storage space inside the physical server is lost.

Contents of the invention

In order to solve the existing technical problems, the embodiments of the present invention provide a data processing method, its system, and a server, which can at least solve the above-mentioned problems in the prior art.

The technical scheme of the embodiment of the present invention is realized like this:

The first aspect of the embodiment of the present invention provides a data processing method, the method comprising:

The server receives a data request for the target data; wherein, the server is provided with at least one local hard disk and connected with an external storage device, so that the server can store data based on the at least one local hard disk and the external storage device Expanding the storage space of the server through the external storage device in the case of realizing data redundancy;

Determine a response strategy for responding to the data request; the response strategy includes at least a first strategy and a second strategy; wherein, under the first strategy, the server uses the target hard disk in the at least one local hard disk set by itself Respond to the data request and process the target data; under the second policy, the server uses the external storage device to respond to the data request and process the target data.

In the above solution, the data request represents a read operation requesting to obtain the target data; correspondingly, the determining a response strategy in response to the data request includes:

Based on the read operation represented by the data request, select a target hard disk storing the target data from the at least one local hard disk, and determine whether the target hard disk is in a fault state;

A response strategy for responding to the data request is determined based on the judgment result.

In the above solution, the determination of the response strategy for responding to the data request based on the judgment result includes:

When the target hard disk is in the failure state, the server selects the second policy, and acquires the target data from the external storage device storing the target data based on the second policy, and send the target data;

When the target hard disk is not in the fault state, the server selects the first strategy, obtains the target data from the target hard disk based on the first strategy, and sends the target data.

In the above solution, the response strategy further includes a third strategy; correspondingly, the determination of the response strategy for responding to the data request based on the judgment result includes:

When the target hard disk is in the failure state, the server selects the third strategy, and based on the third strategy, stores the target from the at least one local hard disk except the target hard disk. Get the target data in the hard disk of the data, and send the target data;

When the target hard disk is not in the fault state, the server selects the first strategy, obtains the target data from the target hard disk based on the first strategy, and sends the target data.

In the above solution, the data request represents a write operation requesting to store the target data; correspondingly, the method further includes:

The server selects the first strategy and the second strategy based on the write operation represented by the data request, and stores the target data in the target hard disk based on the first strategy, and stores the target data in the target hard disk based on the second strategy storing the target data in the external storage device, so as to perform backup processing on the target data.

In the above solution, the data request represents a write operation requesting to store the target data; the response strategy further includes a fourth strategy; correspondingly, the method further includes:

The server selects the first strategy and the fourth strategy based on the write operation represented by the data request, and stores the target data in the target hard disk based on the first strategy, and stores the target data in the target hard disk based on the fourth strategy storing the target data in hard disks other than the target hard disk in the at least one local hard disk, so as to perform backup processing on the target data.

The second aspect of the embodiment of the present invention provides a server, and the server includes:

The receiving unit is configured to receive a data request for target data; wherein, at least one local hard disk is set in the server, and an external storage device is connected, so that the server can be based on the at least one local hard disk and the The external storage device expands the storage space of the server through the external storage device under the condition of realizing data redundancy;

A processing unit, configured to determine a response strategy for responding to the data request; the response strategy includes at least a first strategy and a second strategy; wherein, under the first strategy, the server uses the at least one local The target hard disk in the hard disk responds to the data request and processes the target data; under the second strategy, the server uses the external storage device to respond to the data request and processes the target data.

In the above solution, the data request represents a read operation requesting to acquire the target data; correspondingly, the processing unit is further configured to select a data from the at least one local hard disk based on the read operation represented by the data request extracting the target hard disk storing the target data, and judging whether the target hard disk is in a fault state; determining a response strategy for responding to the data request based on the judging result.

In the solution above, the processing unit is further configured to select the second strategy when the target hard disk is in the failure state, and based on the second strategy, select The device acquires the target data and sends the target data; and is also used for selecting the first strategy when the target hard disk is not in the fault state, and selecting the first strategy from the target hard disk based on the first strategy Obtain the target data in and send the target data.

In the above solution, the response strategy further includes a third strategy; correspondingly, the processing unit is further configured to select the third strategy when the target hard disk is in the failure state, and based on the third The policy acquires the target data from hard disks other than the target hard disk in the at least one local hard disk that store the target data, and sends the target data; it is also used when the target hard disk is not in the target hard disk In the fault state, select the first strategy, and obtain the target data from the target hard disk based on the first strategy, and send the target data.

In the above solution, the data request represents a write operation requesting to store the target data; correspondingly, the processing unit is further configured to select the first strategy and the second strategy based on the write operation represented by the data request. policy, and store the target data in the target hard disk based on the first policy, and store the target data in the external storage device based on the second policy, so as to perform backup processing on the target data.

In the above solution, the data request represents a write operation requesting to store the target data; the response strategy further includes a fourth strategy; correspondingly, the processing unit is further configured to perform a write operation based on the data request , selecting the first strategy and the fourth strategy, and storing the target data to the target hard disk based on the first strategy, and storing the target data to the at least one local hard disk based on the fourth strategy In other hard disks except the target hard disk, the target data is backed up.

The third aspect of the embodiment of the present invention provides a data processing system, the system includes at least one server, and an external storage device; wherein,

The server is configured to receive a data request for target data; wherein, the server is provided with at least one local hard disk and is connected to an external storage device, so that the server can be based on the at least one local hard disk and the The external storage device expands the storage space of the server through the external storage device under the condition of realizing data redundancy; determines a response strategy for responding to the data request; the response strategy includes at least a first strategy and a second strategy; Wherein, under the first strategy, the server responds to the data request and processes the target data using the target hard disk in the at least one local hard disk set by itself; under the second strategy, the server using the external storage device to respond to the data request and process the target data;

The external storage device is configured to respond to the data request and process the target data.

The data processing method and its system and server described in the embodiments of the present invention connect an external storage device through the server, and use the external storage device to implement a data response strategy. In this way, when data redundancy is achieved, the external storage device The device expands the storage space of the server. Therefore, the method described in the embodiment of the present invention solves the existing problem of hard disk capacity loss caused by storing redundant data in the server; at the same time, when the embodiment of the present invention implements the Raid scheme, It can be implemented jointly on the internal hard disk of the server and the external storage device connected to the server. Therefore, this embodiment lays the foundation for solving the existing problem of loss of storage space on the hard disk of the physical server because the Raid solution is only implemented on the hard disk in the physical server. foundation.

Description of drawings

FIG. 1 is a schematic flow diagram of a data processing method according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the composition and structure of the server in Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of the composition and structure of a data processing system according to an embodiment of the present invention in a specific application.

Detailed ways

In order to understand the characteristics and technical content of the present invention in more detail, the implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the present invention.

Embodiment one

This embodiment provides a data processing method, and the method is applied to a server; specifically, as shown in FIG. 1, the method includes:

Step 101: The server receives a data request for the target data; wherein, the server is provided with at least one local hard disk and connected with an external storage device, so that the server can be based on the at least one local hard disk and the external storage device. The storage device expands the storage space of the server through the external storage device under the condition of realizing data redundancy;

That is to say, in this embodiment, the server is not only provided with a local hard disk for storing data, but also connected with an external storage device, and then the server can realize data storage through the local hard disk and the external storage device, In this way, the storage space of the server is expanded through the external storage device, which solves the existing problem of hard disk capacity loss due to redundant data stored in the server.

In practical applications, the external storage device is not only used to store redundant data, but can be used as a hard disk of the server to store arbitrary data. For example, assuming that the external storage device is equivalent to a hard disk, the server is set There are two local hard disks. In this way, the server connected with the external storage device is equivalent to having three hard disks. In this way, the storage space of the server is increased. That is to say, when the present embodiment realizes the Raid scheme, it is not implemented on the hard disk in a server, but is implemented jointly on the internal hard disk of the server and the external storage device connected to the server. Issues that are implemented only on hard disks within physical servers resulting in loss of storage space on physical server hard disks.

Step 102: Determine a response strategy for responding to the data request; the response strategy includes at least a first strategy and a second strategy; wherein, under the first strategy, the server uses the at least one local hard disk set by itself The target hard disk of the server responds to the data request and processes the target data; under the second policy, the server uses the external storage device to respond to the data request and processes the target data.

Here, since the server is connected to an external storage device, this embodiment needs to set a data access mechanism; specifically, the first access mechanism, the server directly accesses the local hard disk, and responds to the data request through the local hard disk; the second access Mechanism, the server does not access the local hard disk, but accesses the connected external storage device, and then responds to the data request through the external storage device.

In a specific embodiment, when the data request represents a read operation requesting to obtain the target data, at this time, the server first needs to read the target data from the at least one local hard disk based on the read operation represented by the data request. Selecting a target hard disk storing the target data, and judging whether the target hard disk is in a fault state; and then determining a response strategy for responding to the data request based on the judging result. Specifically, when the target hard disk is in the failure state, the server selects the second policy, and based on the second policy, obtains the target data, and send the target data; otherwise, the server selects the first strategy, and directly acquires the target data from the target hard disk based on the first strategy, and sends the target data.

Here, in practical applications, the target data can also be stored in other hard disks in the local hard disk of the server except the target hard disk; at this time, the response strategy also includes a third strategy; when the target When the hard disk is in the fault state, the server selects the third strategy, and based on the third strategy, selects the target data from hard disks other than the target hard disk in the at least one local hard disk. to obtain the target data, and send the target data; otherwise, the server still selects the first strategy, and obtains the target data from the target hard disk based on the first strategy, and sends the target data.

In this way, the data read operation is realized by using the local hard disk of the server and the external storage device connected to the server. Moreover, in the method described in this embodiment, when the target hard disk is in a normal state, that is, when there is no failure, the server preferentially reads the local hard disk, thus ensuring access efficiency; The external storage device is read. Therefore, this embodiment improves the storage space of the server without reducing the access efficiency.

In another specific embodiment, when the data request represents a write operation requesting to store the target data; at this time, the server selects the first strategy and the second strategy based on the write operation represented by the data request. policy, and store the target data in the target hard disk based on the first policy, and store the target data in the external storage device based on the second policy, so as to perform backup processing on the target data.

Here, in practical applications, the target data can also be stored in other hard disks in the local hard disk of the server except the target hard disk; at this time, the response strategy also includes a fourth strategy; the server based on For the write operation represented by the data request, select the first strategy and the fourth strategy, and store the target data in the target hard disk based on the first strategy, and store the target data in the target hard disk based on the fourth strategy. The data is stored in other hard disks in the at least one local hard disk except the target hard disk, so as to back up the target data.

In this way, in the method described in the embodiment of the present invention, the server is connected to an external storage device, and the external storage device is used to implement a data response strategy. In this way, the external storage device expands the The storage space of the server, therefore, the method described in the embodiment of the present invention solves the existing problem of hard disk capacity loss due to storing redundant data in the server; at the same time, when the embodiment of the present invention implements the Raid scheme, the hard disk inside the server can It is jointly implemented on an external storage device connected to the server. Therefore, this embodiment lays a foundation for solving the existing problem of loss of physical server hard disk storage space due to the fact that the Raid scheme is only implemented on the hard disk in the physical server.

Embodiment two

This embodiment provides a server, as shown in Figure 2, the server includes:

The receiving unit 21 is configured to receive a data request for target data; wherein, the server is provided with at least one local hard disk and connected with an external storage device, so that the server can be based on the at least one local hard disk and the The external storage device expands the storage space of the server through the external storage device under the condition of realizing data redundancy;

The processing unit 22 is configured to determine a response policy in response to the data request; the response policy includes at least a first policy and a second policy; wherein, under the first policy, the server uses the at least one set by itself The target hard disk in the local hard disk responds to the data request and processes the target data; under the second strategy, the server uses the external storage device to respond to the data request and processes the target data.

In an embodiment, the data request represents a read operation requesting to obtain the target data; correspondingly, the processing unit 22 is further configured to, based on the read operation represented by the data request, obtain the Selecting the target hard disk storing the target data from the hard disks, and judging whether the target hard disk is in a fault state; determining a response strategy for responding to the data request based on the judging result.

In an embodiment, the processing unit 22 is further configured to select the second strategy when the target hard disk is in the failure state, and select the to acquire the target data from the external storage device, and send the target data; and to select the first strategy when the target hard disk is not in the fault state, and select the first strategy from the target data based on the first strategy acquire the target data from the target hard disk, and send the target data.

In another embodiment, the response strategy further includes a third strategy; correspondingly, the processing unit 22 is further configured to select the third strategy when the target hard disk is in the failure state, and based on The third policy obtains the target data from hard disks other than the target hard disk in the at least one local hard disk that store the target data, and sends the target data; it is also used when the target When the hard disk is not in the fault state, select the first strategy, obtain the target data from the target hard disk based on the first strategy, and send the target data.

In another embodiment, the data request represents a write operation requesting to store the target data; correspondingly, the processing unit 22 is further configured to select the first policy and a second policy, and store the target data in the target hard disk based on the first policy, and store the target data in the external storage device based on the second policy, so as to store the target data Perform backup processing.

In another embodiment, the data request represents a write operation requesting to store the target data; the response strategy further includes a fourth strategy; correspondingly, the processing unit 22 is further configured to A write operation characterized by selecting the first strategy and the fourth strategy, storing the target data in the target hard disk based on the first strategy, and storing the target data in the target hard disk based on the fourth strategy In at least one local hard disk other than the target hard disk, the target data is backed up.

It should be pointed out here that: the descriptions of the above server embodiment items are similar to the above method descriptions, and have the same beneficial effects as those of the method embodiments, so details are not repeated here. For the technical details not disclosed in the server embodiment of the present invention, those skilled in the art should refer to the description of the method embodiment of the present invention to understand, and to save space, details are not repeated here.

Embodiment three

The present embodiment provides a kind of data processing system; Here, traditional Raid card generally can be connected with the hard disk inside this machine chassis, or realizes with disk cluster (JBOD, Just a Bunch Of Disks) through external SAS (Statistical Analysis System) interface. ) connection and provide Raid function. To configure Raid on the local machine or JBOD, it is generally required that the hard disk is on a physical device (or all hard disks are hung under the same motherboard). Moreover, in order to ensure data security, it is necessary to make Raid1, Raid10, Raid5, Raid6, etc., these Raid modes will cause the total capacity of the server to "lose" the capacity of one or more hard disks, so, in order to solve the above problems, this embodiment provides A data processing system is provided to implement a cross-server Raid scheme. Moreover, the system described in this embodiment does not lose the hard disk capacity in a single server while ensuring data security. Specifically, the system includes at least one server, and an external storage device; wherein,

The server is configured to receive a data request for target data; wherein, the server is provided with at least one local hard disk and is connected to an external storage device, so that the server can be based on the at least one local hard disk and the The external storage device expands the storage space of the server through the external storage device under the condition of realizing data redundancy; determines a response strategy for responding to the data request; the response strategy includes at least a first strategy and a second strategy; Wherein, under the first strategy, the server responds to the data request and processes the target data using the target hard disk in the at least one local hard disk set by itself; under the second strategy, the server using the external storage device to respond to the data request and process the target data;

The external storage device is configured to respond to the data request and process the target data.

The descriptions of the server and the external storage device items in this embodiment are similar to those in the method embodiments, and will not be repeated here.

The system described in the embodiment of the present invention will be further described in detail below in conjunction with specific implementation methods; specifically, as shown in Figure 3, the system includes: a server, a SAS switch, and a JBOD (that is, an external storage device); wherein, the Multiple hard disks are set in the server, and multiple hard disks are also set in the JBOD; the server is connected to the SAS switch through a Raid card, and the JBOD is connected to the SAS switch through a SAS connector; specifically, The specific implementation process of the Raid solution across servers in this embodiment includes:

First, the Raid card adopted by the server described in this embodiment is different from the traditional Raid card. The Raid card described in this embodiment has two (kinds) interfaces in total, and one (kinds) interface is connected to the hard disk or the hard disk in the server. The SAS expansion card is connected, and the other (type) interface is connected to the SAS switch outside the server. Here, the SAS switch can address different SAS connectors and the hard disks connected behind them.

Second, the JBOD described in this embodiment is connected to a SAS switch through its internal SAS connector. The SAS connector can be configured with a fixed number to distinguish it from the SAS connectors of other JBODs connected to the SAS switch. For example, the number of the SAS connector in the JBOD is tentatively A1. The numbers of the connected hard disks can be A1.1, A1.2, A1.3, A1.4 and so on. In a specific embodiment, the hard disk in the JBOD can be used as a backup hard disk for multiple servers connected to the SAS switch.

The 3rd, the server described in this embodiment can connect different hard disks (A1.1, A1.2, A1.3) on the SAS connectors (such as A1, A2, etc.) …..) for addressing, thereby forming a Raid group with the local hard disk in the server, and realizing a cross-server Raid solution. Here, in practical applications, if Raid5 needs to be implemented, one hard disk needs to be provided in the JBOD, and if Raid6 is realized, two hard disks need to be provided in the JBOD, and other requirements of the Raid must also be met. That is to say, the number of hard disks set in the JBOD can be set arbitrarily according to actual needs.

Fourth, when there are multiple Raid groups on one server, you can choose to let JBOD provide different hard disks for these Raid groups, and create Raid groups by distinguishing different hard disks. Of course, the same Raid group and different Raid groups of the same server can also be implemented by selecting hard disks in different JBODs.

Take a server, a SAS switch and a JBOD and take Raid5 as an example below to describe the whole process of the embodiment of the present invention in detail:

First, configure the Raid5 composed of the hard disk on the server and the hard disk on the JBOD through the interface on the server (such as the WebBIOS interface currently used by the Raid card of LSI). Here, since the Raid card of the server is connected to the SAS connector on the JBOD through the SAS switch, and the SAS connector is connected to the hard disk in the JBOD, the local hard disk of the server and a certain hard disk on the JBOD can be selected, such as A1.1 Number hard disk to configure as Raid5.

Secondly, after configuring Raid5 to form a hard disk group, you can perform read and write operations on the hard disk group. Here, the hard disk group can be formatted through the operating system. Further, there are mainly two types of operations on the hard disk group by upper-layer applications: read and write. ;specifically,

When the upper-layer application reads data, if the local hard disk of the server does not fail, it only accesses the data in the local hard disk, which is faster; if the server's local hard disk fails, the upper-layer application will not access the local hard disk, but access A corresponding redundant hard disk on the JBOD is used to read data. Here, after the faulty hard disk on the server is replaced, the Raid card will reconstruct the data of the Raid group.

When the upper-layer application writes data, it will simultaneously write the data to the local hard disk of the server and the corresponding redundant hard disk on the JBOD according to the Raid5 mechanism to realize data backup.

In this way, the embodiment of the present invention achieves the purpose of making full use of the local storage space of the server by placing the Raid backup disk on a JBOD, and at the same time effectively guarantees data security.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The above is only the implementation of the embodiment of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the embodiment of the present invention, some improvements and modifications can also be made. These improvements and Retouching should also be regarded as the scope of protection of the embodiments of the present invention.

Claims (13)

1. A method of data processing, the method comprising:

the server receives a data request aiming at target data; the server is provided with at least one local hard disk and is connected with external storage equipment, so that the server can expand the storage space of the server through the external storage equipment based on the at least one local hard disk and the external storage equipment under the condition of realizing data redundancy;

determining a response policy for responding to the data request; the response policy comprises at least a first policy and a second policy; under the first strategy, the server utilizes a target hard disk in the local hard disks set by the server to respond to the data request and process the target data; under the second strategy, the server utilizes the external storage device to respond to the data request and process the target data.

2. The method of claim 1, wherein the data request characterizes a read operation requesting acquisition of the target data; correspondingly, the determining a response policy for responding to the data request includes:

selecting a target hard disk storing the target data from the at least one local hard disk based on the read operation represented by the data request, and judging whether the target hard disk is in a fault state;

and determining a response strategy for responding to the data request based on the judgment result.

3. The method of claim 2, wherein determining a response policy for responding to the data request based on the determination comprises:

when the target hard disk is in the fault state, the server selects the second strategy, acquires the target data from the external storage equipment storing the target data based on the second strategy, and sends the target data;

and when the target hard disk is not in the fault state, the server selects the first strategy, acquires the target data from the target hard disk based on the first strategy and sends the target data.

4. The method of claim 2, wherein the response policy further comprises a third policy; correspondingly, the determining a response policy for responding to the data request based on the determination result includes:

when the target hard disk is in the fault state, the server selects the third strategy, acquires the target data from other hard disks which store the target data and are except the target hard disk in the at least one local hard disk based on the third strategy, and sends the target data;

and when the target hard disk is not in the fault state, the server selects the first strategy, acquires the target data from the target hard disk based on the first strategy and sends the target data.

5. The method of claim 1, wherein the data request characterizes a write operation requesting storage of the target data; correspondingly, the method further comprises:

the server selects the first strategy and the second strategy based on the write operation represented by the data request, stores the target data to the target hard disk based on the first strategy, and stores the target data to the external storage device based on the second strategy so as to backup the target data.

6. The method of claim 1, wherein the data request characterizes a write operation requesting storage of the target data; the response policy further comprises a fourth policy; correspondingly, the method further comprises:

the server selects the first strategy and the fourth strategy based on the write operation represented by the data request, stores the target data to the target hard disk based on the first strategy, and stores the target data to other hard disks except the target hard disk in the at least one local hard disk based on the fourth strategy so as to backup the target data.

7. A server, characterized in that the server comprises:

a receiving unit configured to receive a data request for target data; the server is provided with at least one local hard disk and is connected with external storage equipment, so that the server can expand the storage space of the server through the external storage equipment based on the at least one local hard disk and the external storage equipment under the condition of realizing data redundancy;

a processing unit for determining a response policy for responding to the data request; the response policy comprises at least a first policy and a second policy; under the first strategy, the server utilizes a target hard disk in the local hard disks set by the server to respond to the data request and process the target data; under the second strategy, the server utilizes the external storage device to respond to the data request and process the target data.

8. The server of claim 7, wherein the data request characterizes a read operation requesting acquisition of the target data; correspondingly, the processing unit is further configured to select a target hard disk storing the target data from the at least one local hard disk based on the read operation represented by the data request, and determine whether the target hard disk is in a failure state; and determining a response strategy for responding to the data request based on the judgment result.

9. The server according to claim 8, wherein the processing unit is further configured to select the second policy when the target hard disk is in the failure state, acquire the target data from the external storage device storing the target data based on the second policy, and send the target data; and the system is further used for selecting the first strategy when the target hard disk is not in the fault state, acquiring the target data from the target hard disk based on the first strategy, and sending the target data.

10. The server of claim 8, wherein the response policy further comprises a third policy; correspondingly, the processing unit is further configured to select the third policy when the target hard disk is in the fault state, acquire the target data from other hard disks, which store the target data, in the at least one local hard disk except the target hard disk based on the third policy, and send the target data; and the system is further used for selecting the first strategy when the target hard disk is not in the fault state, acquiring the target data from the target hard disk based on the first strategy, and sending the target data.

11. The server of claim 7, wherein the data request characterizes a write operation requesting storage of the target data; correspondingly, the processing unit is further configured to select the first policy and the second policy based on the write operation characterized by the data request, store the target data to the target hard disk based on the first policy, and store the target data to the external storage device based on the second policy, so as to perform backup processing on the target data.

12. The server of claim 7, wherein the data request characterizes a write operation requesting storage of the target data; the response policy further comprises a fourth policy; correspondingly, the processing unit is further configured to select the first policy and the fourth policy based on the write operation represented by the data request, store the target data to the target hard disk based on the first policy, and store the target data to another hard disk of the at least one local hard disk except the target hard disk based on the fourth policy, so as to perform backup processing on the target data.

13. A data processing system, said system comprising at least one server, and an external storage device; wherein,

the server is used for receiving a data request aiming at target data; the server is provided with at least one local hard disk and is connected with external storage equipment, so that the server can expand the storage space of the server through the external storage equipment based on the at least one local hard disk and the external storage equipment under the condition of realizing data redundancy; determining a response policy for responding to the data request; the response policy comprises at least a first policy and a second policy; under the first strategy, the server utilizes a target hard disk in the local hard disks set by the server to respond to the data request and process the target data; under the second strategy, the server utilizes the external storage equipment to respond to the data request and process the target data;

and the external storage equipment is used for responding to the data request and processing the target data.