TWI769880B - Application synchronization method and high-availability system - Google Patents

Abstract

The disclosure provides an application synchronization method and a high-availability system. The method includes:, generating, by a primary device, an application program installation list in response to the primary device has installed a plurality of applications according to a specific installation sequence; sending, by the primary device, the application installation list to each secondary device; and installing, by each secondary device, the applications according to the specific installation sequence recorded in the application installation list.

Description

Application synchronization method and high availability system

The present invention relates to an application synchronization mechanism, and more particularly, to an application synchronization method suitable for high availability systems.

When providing network services, it is a common solution to use a high availability (High Availability) system to provide network services in order to avoid failure to maintain services due to device failures.

Generally speaking, a high-availability system includes a main device and several sub-devices, so that when the main device fails, one of the sub-devices can continue to provide network services. In order to enable the sub-device to continuously provide network services, there is a method in the prior art to allow the sub-device to synchronize with the main device in a mirroring manner, and this mirroring method generally completely copies the hard disk content of the main device to the sub-device. on the hard disk.

However, in some contexts, this approach may give rise to other problems. For example, if a certain network port on the main device is set to be used as a FTP server, after the sub-devices are synchronized with the main device through the above method, each sub-device will compete for the above-mentioned network port situation.

Therefore, for those skilled in the art, how to design a mechanism for enabling a high availability system to synchronize only the required data is an important issue.

In view of this, the present invention provides an application synchronization method and a high availability system, which can be used to solve the above technical problems.

The present invention provides an application synchronization method, which is suitable for a high availability system including a main device and at least one sub-device. an application installation list, wherein the application installation list records a specific installation sequence and the plurality of applications; the main device sends the application installation list to each sub-device; and the specific installation list is recorded by each sub-device according to the application installation list The installation sequence installs the plurality of applications.

The present invention provides an application synchronization system, which includes a main device and at least one sub-device. The master device is configured to: in response to installing a plurality of applications according to a specific installation order, correspondingly generate an application installation list, wherein the application installation list records the specific installation order and the plurality of applications; send the application installation list. The at least one sub-device is connected to the main device, and each sub-device is configured to install the plurality of applications according to a specific installation order recorded in the application installation list.

100: High Availability System

110: Main unit

110a, 121a, 122a: Installation file database

121~12N: Sub-device

F1: File update notification

L1: Application installation list

P1~PK: installation file

S210~S230: Steps

FIG. 1 is a schematic diagram of a high availability system according to an embodiment of the present invention.

FIG. 2 is a flowchart of an application synchronization method according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of installing an application program according to the sub-device shown in FIG. 1 .

FIG. 3B is a schematic diagram of installing an application program according to the sub-device shown in FIG. 3A .

Please refer to FIG. 1 , which is a schematic diagram of a high availability system according to an embodiment of the present invention. In FIG. 1, the high availability system 100 includes a main device 110 and N sub-devices 121-12N (N is a positive integer) interconnected with each other, wherein the main device 110 is, for example, a main service device for providing a specific network service. , and each of the sub-devices 121-12N is, for example, a secondary service device that can continue to provide the above-mentioned specific network service instead of the main device 110 when the main device 110 cannot continue to provide services for some reason, but it is not limited thereto.

In different embodiments, the main device 110 and the sub-devices 121 - 12N can be implemented as various servers, computer devices and/or smart devices, respectively, but not limited thereto. In some embodiments, the main device 110 and the sub-devices 121 - 12N may each include a storage circuit and a processor. In different embodiments, the above-mentioned storage circuit is, for example, any type of fixed or removable random access memory (Random Access Memory, RAM), Read-Only Memory (ROM), and flash memory. Flash memory, hard disk or other similar devices or a combination of these devices can be used to record multiple codes or modules.

In addition, the above-mentioned processor can be coupled to the corresponding storage circuit, and can be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more Microprocessors, controllers, microcontrollers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), any other kind of combination with a digital signal processor core integrated circuits, state machines, Advanced RISC Machine (ARM)-based processors, and the like.

In the embodiment of the present invention, the high-availability system 100 can be used to execute the application synchronization method proposed by the present invention, the details of which are described below.

Please refer to FIG. 2 , which is a flowchart of an application synchronization method according to an embodiment of the present invention. The method of this embodiment can be executed by the high availability system 100 in FIG. 1 , and the details of each step in FIG. 2 will be described below in conjunction with the elements shown in FIG. 1 .

In some embodiments, the host device 110 can use the apt tool to install a plurality of application programs A1 to AK (K is a positive integer) in an operating system executed on the host device 110 according to a specific installation sequence. In some embodiments, the host device 110 can use the apt-ftparchive tool to create an installation file database 110a on the host device 110, wherein the installation file database 110a can be used to store the installation files P1~PK corresponding to the application programs A1~AK respectively .

In some embodiments, since there may be dependencies among the applications A1~AK (that is, the installation of a certain application must precede another application), the designer can pre-determine the dependencies between the applications A1~AK. Dependency determines application The installation sequence of A1 to AK is used as the specific installation sequence for the main device 110 to install the application programs A1 to AK. For convenience of description, it is assumed that the main device 110 is set to install the applications A1 to AK in sequence, but it is not limited to this.

Correspondingly, in step S210 , in response to the fact that the main device 110 has installed a plurality of application programs A1 to AK according to a specific installation sequence, the main device 110 can generate an application installation list L1 accordingly. In one embodiment, when the main device 110 uses the apt tool to install the application programs A1 to AK according to the specific installation sequence, the apt tool can record the specific installation sequence and the application programs A1 to AK as the path "/var/log/ dpkg.log" log file. In this case, the host device 110 can use the log file as the application installation list L1. In other words, the application installation list L1 can record the above-mentioned specific installation sequence and application programs A1~AK.

Afterwards, in step S220, the main device 110 may send the application installation list L1 to each of the sub-devices 121-12N. In one embodiment, after the main device 110 completes the installation of the applications A1 to AK and obtains the application installation list L1, it can wait for a preset time before sending the application installation list L1 to the sub-devices 121 to 12N. limited to this.

Next, in step S230, each of the sub-devices 121-12N can install the plurality of application programs A1-AK according to the specific installation sequence recorded in the application-program installation list L1. The following will be supplemented with FIG. 3A for further description.

Please refer to FIG. 3A , which is a schematic diagram of installing an application program according to the sub-device shown in FIG. 1 . In FIG. 3A, after the sub-device 121 receives the application installation list L1 from the main device 110, the sub-device 121 may install the application in response to the application installation list L1 The connection speed between the sub-device 121 and the main device 110 and other sub-devices (eg, sub-devices 122-12N) is measured, and a source device is selected from the main device 110 and other sub-devices accordingly. For convenience of description, the connection speed between the sub-device 121 and the main device 110 is referred to as R0 below, and the connection speed between the sub-device 121 and each of the sub-devices 122 to 12N is referred to as R2 to RN.

In different embodiments, the sub-device 121 may select from the main device 110 and other sub-devices, one of the installation files P1 ˜PK of the application programs A1 ˜AK stored in the connection speed meeting a specific condition as the source of the sub-device 121 device.

In one embodiment, it is assumed that the connection speed (ie, R0 ) between the sub-device 121 and the main device 110 meets a specific condition (for example, R0 is higher than a predetermined speed value), and the installation file database 110 a of the main device 110 The installation files P1~PK are stored in . In this case, the sub-device 121 may select the main device 110 as the source device of the sub-device 121, but it is not limited thereto.

In different embodiments, when R0 is greater than R2˜RN (ie, R0 is the highest connection speed), the sub-device 121 may also determine that R0 meets the above-mentioned specific conditions, but it is not limited thereto.

Afterwards, the sub-device 121 can obtain the installation files P1-PK of the application programs A1-AK from the selected source device (ie, the main device 110) according to the application programs A1-AK recorded in the application-installation list L1.

In one embodiment, each of the sub-devices 121-12N may be provided with an installation file database similar to the installation file database 110a. For example, the sub-device 121 can use the apt-ftparchive tool to create the installation file database 121a on the sub-device 121, and the sub-device 122 The installation file database 122a may be created on the sub-device 122 using the apt-ftparchive tool, but is not limited thereto. Therefore, after the sub-device 121 obtains the installation files P1-PK of the application programs A1-AK from the selected source device (ie, the main device 110), the sub-device 121 can store the installation files P1-PK in the installation-file database 121a , but not limited to this.

Next, the sub-device 121 can execute the installation files P1 ˜PK of the application programs A1 ˜AK according to the above-mentioned specific installation sequence recorded in the application program installation list L1 , so as to install the application programs A1 ˜AK in sequence.

In some embodiments, before sequentially installing the applications A1 ˜AK, the sub-device 121 may first determine whether one or more of the application programs A1 ˜AK have been installed on the sub-device 121 . In one embodiment, in response to the sub-device 121 determining that the sub-device 121 has installed the first application program in the application programs A1-AK, the sub-device 121 can find the first application program corresponding to the first application program in the installation files P1-PK 's first installation file. Afterwards, the sub-device 121 can skip the first installation file in the process of executing the installation files P1 to PK of the application programs A1 to AK according to the above-mentioned specific installation sequence.

For example, if the sub-device 121 determines that the application programs A1 and A3 have been installed, the sub-device 121 can find the installation files P1 and P3 corresponding to the application programs A1 and A3, and execute the application program A1 according to the above-mentioned specific installation sequence. In the process of installing files P1~PK of ~AK, the installation files P1 and P3 are skipped. That is, for example, the sub-device 121 can execute the installation files P2, P4-PK in sequence, but not limited to this.

In some embodiments, even if the sub-device 121 determines that the above-mentioned first application has been installed, if the sub-device 121 determines that the version of the first application recorded in the application installation list L1 is different from the first application installed on the sub-device 121 version of the program, Then, the sub-device 121 may not skip the first installation file corresponding to the above-mentioned first application program in the process of executing the installation files P1-PK of the application programs A1-AK according to the above-mentioned specific installation sequence, but it is not limited thereto.

In the above situation, since the sub-device 121 installs the applications A1 ˜AK according to the above-mentioned specific installation sequence, the dependencies between the applications A1 ˜AK on the sub-device 121 can be properly arranged.

Moreover, compared with the conventional method of synchronizing by mirroring, the present invention can only allow the sub-device 122 to synchronize the installation of the application program installed on the main device 110 , so that the sub-device 122 and the main device can be completed in a more flexible manner Sync between 110.

In some embodiments, after the sub-device 121 stores the installation files P1-PK in the installation-file database 121a and completes the installation of the application programs A1-AK, the sub-device 121 can also be used as a source device for other sub-devices. The following is supplemented with FIG. 3B for further description.

Please refer to FIG. 3B , which is a schematic diagram of installing an application program according to the sub-device shown in FIG. 3A . In FIG. 3B, after the sub-device 122 receives the application installation list L1 from the main device 110, the sub-device 122 can measure the sub-device 122, the main device 110 and other sub-devices (eg, sub-devices) according to the application installation list L1 The connection speed between the devices 121, 123-12N), and select the source device among the main device 110 and other sub-devices accordingly.

In different embodiments, the sub-device 122 may select from the main device 110 and other sub-devices, one of the installation files P1 ˜PK of the application programs A1 ˜AK stored in the connection speed meeting a specific condition as the source of the sub-device 122 device.

In FIG. 3B , it is assumed that the connection speed between the sub-device 122 and the sub-device 121 is The speed meets the above-mentioned specific conditions (eg, higher than the preset speed value), and the installation files P1 to PK are stored in the installation file database 121 a of the sub-device 121 . In this case, the sub-device 122 may select the sub-device 121 as the source device of the sub-device 122, but it is not limited thereto.

Afterwards, the sub-device 122 can obtain the installation files P1-PK of the application programs A1-AK from the selected source device (ie, the sub-device 121) according to the application programs A1-AK recorded in the application-installation list L1.

Since the sub-device 122 is provided with the installation file database 122a, after the sub-device 122 obtains the installation files P1-PK of the application programs A1-AK from the selected source device (ie, the sub-device 121), the sub-device 122 can store the installation files P1-PK of the application programs A1-AK. The installation files P1 to PK are stored in the installation file database 122a. In this way, the sub-device 122 can be used as a source device of other sub-devices, but not limited to this.

Next, the sub-device 122 can execute the installation files P1 ˜PK of the application programs A1 ˜AK according to the above-mentioned specific installation sequence recorded in the application program installation list L1 , so as to install the application programs A1 ˜AK in sequence. For related details, please refer to the description of installing the application programs A1 to AK in the sub-device 121 in FIG. 3A , which will not be repeated here.

In the above situation, since the sub-device 122 also installs the applications A1 ˜AK according to the above-mentioned specific installation sequence, the dependencies between the applications A1 ˜AK on the sub-device 122 can also be properly arranged.

Based on the above teachings, other sub-devices (eg, the sub-devices 123 - 12N) can each complete the installation of the applications A1 -AK according to the specific installation sequence recorded in the application installation list L1.

In some embodiments, in addition to installing the applications A1-AK installed on the main device 110 on the sub-devices 121-12N, the present invention can also specify to synchronize some setting files on some applications to the sub-devices 121~12N.

In one embodiment, assuming that the main device 110 is configured to synchronize a setting file (such as a bookmark of the web browser) on the application A1 (such as a web browser) to the sub-devices 121-12N, the main device 110 can monitor whether the setting file of the application A1 has been changed.

In response to the main device 110 determining that the setting file of the application A1 has been changed (for example, a newly added URL appears in the bookmark), the main device 110 may send a file update notification F1 corresponding to the setting file to each sub-device 121 ~12N. In one embodiment, the file update notification F1 may include the setting file of the application A1 on the main device 110 (eg, the bookmark of the web browser of the main device 110 ).

In one embodiment, since the application A1 is also installed on each of the sub-devices 121 - 12N, the application A1 of each of the sub-devices 121 - 12N will also have the setting file. Therefore, after each sub-device 121-12N receives the file update notification F1, each sub-device 121-12N can update the setting file of the corresponding application A1 accordingly. For example, after the sub-device 121 receives the file update notification F1, the sub-device 121 may synchronize the setting file of the application A1 on the sub-device 121 with the setting file of the application A1 on the main device 110 (eg, The bookmark of the web browser of the sub-device 121 is replaced with the bookmark of the web browser of the main device 110 ), but not limited to this.

On the other hand, in some embodiments, assuming that the main device 110 is configured not to synchronize other setting files on the application A1 to the sub-devices 121-12N, there is no Regardless of whether the main device 110 detects that the other setting files have been changed, the main device 110 may not send any notification to each of the sub-devices 121 - 12N. In this way, each of the sub-devices 121 to 12N may not synchronize with the main device 110 for the other setting files on the application A1, but it is not limited to this.

To sum up, in the high availability system of the present invention, the master device can generate an application installation list accordingly after completing the installation of multiple applications in a specific installation sequence, and send the application installation list to the high availability system each sub-device in . Correspondingly, each sub-device can install the plurality of applications according to the above-mentioned specific installation sequence recorded in the application installation list. In this way, only the application programs on the main device can be installed in each sub-device synchronously, so that the synchronization between each sub-device and the main device can be completed in a more flexible manner. In addition, since each sub-device installs the plurality of application programs according to the above-mentioned specific installation sequence, the dependencies between the application programs of each sub-device can be properly arranged.

In addition, since the sub-devices can select a suitable source device from other sub-devices to obtain the installation files of each application program, the situation that all sub-devices require to obtain the installation files of each application program from the main device can be avoided. Thereby, a load balancing effect in a high-availability system can be achieved.

In addition to allowing the sub-devices to synchronize the application installation situation on the main device, the present invention also allows the main device to synchronize only one or more setting files of an application to the sub-devices, thereby further increasing the high availability system when the synchronization is performed. elasticity.

Although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention, and any person with ordinary knowledge in the technical field will not depart from the spirit of the present invention. The scope of protection of the present invention should be determined by the scope of the appended patent application.

S210~S230: Steps

Claims (12)

An application synchronization method, suitable for an application synchronization system including a main device and at least one sub-device, the at least one sub-device including a first sub-device and at least one other sub-device, the method comprising: responding to the The main device has installed a plurality of application programs according to a specific installation sequence, and the main device generates an application program installation list correspondingly, wherein the application program installation list records the specific installation sequence and the application programs; sent by the main device the application installation list to each of the sub-devices; and installing the applications by each of the sub-devices according to the specific installation order recorded in the application installation list, including: by the first sub-device in response to the application installation list and measure the connection speed between the first sub-device, the main device and each of the other sub-devices, and select a source device from the main device and the at least one other sub-device accordingly; the first sub-device According to the applications recorded in the application installation list, the installation files of the application programs are obtained from the source device; the installation files of the application programs are executed by the first sub-device according to the specific installation sequence. The method of claim 1, wherein the host device uses an apt tool to install the applications according to the specific installation sequence, wherein the apt tool records the specific installation sequence and the applications as a log file, and The host device uses the log file as the application installation list. The method of claim 2, wherein the storage path of the log file includes /var/log/dpkg.log. The method of claim 1, further comprising: using an apt-ftparchive tool by the host device to create an installation file database on the host device, wherein the installation file database is used to store a plurality of installation files of the application programs . The method of claim 1, wherein the step of executing the installation files of the application programs by the first sub-device according to the specific installation sequence comprises: determining that the first sub-device has been installed in response to the first sub-device There is a first application program among the application programs, finding a first installation file corresponding to the first application program in the installation files; and executing the first application program by the first sub-device according to the specific installation sequence The first installation file is skipped in the process of the installation files of the application programs. The method of claim 1, wherein the first sub-device includes an installation file database, and the method further comprises: after the first sub-device obtains the installation files of the application programs from the source device , the installation files are stored in the installation file database of the first sub-device by the first sub-device. The method of claim 1, wherein the source device includes an installation file database for storing the installation files of the application programs, and the connection speed between the source device and the first sub-device to the highest. The method of claim 1, wherein the source device includes an installation file database for storing the installation files of the application programs, and the connection speed between the source device and the first sub-device above a speed threshold. The method of claim 1, wherein the applications include a first application, the at least one sub-device includes a first sub-device, and the application installation list further records a setting of the first application and the method further includes: in response to the main device determining that the setting file of the first application has been changed, sending a file update notification corresponding to the setting file to each of the sub-devices; The device synchronizes the setting file of the first application on the first sub-device with the setting file of the first application on the main device in response to the file update notification. The method of claim 9, wherein the file update notification includes the settings file for the first application on the host device. The method of claim 9, wherein the first application further includes other setting files, and the method further comprises: not sending the other setting files in response to the host device determining that the other setting files of the first application have been changed any notification to each of the sub-devices. An application synchronization system, comprising: a master device configured to: In response to installing a plurality of application programs according to a specific installation sequence, an application program installation list is correspondingly generated, wherein the application program installation list records the specific installation sequence and the application programs; sending the application program installation list; at least one child a device connected to the main device, the at least one sub-device includes a first sub-device and at least one other sub-device, wherein each of the sub-devices is configured to install these in accordance with the specific installation order recorded in the application installation list An application program, including: the first sub-device measures the connection speed between the first sub-device and the main device and each of the other sub-devices according to the application installation list, and according to the connection speed between the main device and the A source device is selected from at least one other sub-device; the first sub-device obtains a plurality of installation files of the application programs from the source device according to the applications recorded in the application installation list; the first sub-device The installation files of the application programs are executed in a specific installation sequence.

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