CN105635300A - Method and device for realizing high availability of NAS sharing service - Google Patents

Abstract

The invention discloses a method and a device for realizing high availability of NAS sharing service. The method comprises the following steps: when any controller in a multi-control storage system establishes the NAS sharing service, storing a transcript of configuration information of the NAS sharing service in each controller of the multi-control storage system as backup; when one controller is crashed due to a fault, analyzing and judging according to the load conditions of the controllers, and selecting a controller from all controllers excluding the crashed controller as a takeover controller; and enabling the takeover controller to establish the corresponding NAS sharing service by means of the transcript of the configuration information of the NAS sharing service of the crashed controller stored in the takeover controller. The method is used for improving the switching effectiveness and high efficiency of the NAS sharing service.

Description

A method and device for realizing high availability of NAS sharing services

technical field

The invention relates to the field of storage technology, in particular to a method and device for realizing high availability of NAS shared services.

Background technique

At present, in a multi-controller storage system, when one of the controllers is down due to software and hardware failures, to ensure that the NAS sharing service on the faulty controller can continue to provide services for users, the storage device managed by the original controller must be Shared services with the NAS are switched to other controllers. During the controller switching process of a conventional multi-controller storage system, the running NAS sharing service of the user must be interrupted. After waiting for the controller switching to complete, the original NAS sharing service needs to be manually re-initiated. Shared data will also be lost accordingly, so effective switching of NAS sharing services cannot be guaranteed, and the effectiveness and efficiency of NAS sharing service switching are very low.

Contents of the invention

The purpose of the present invention is to provide a method and device for realizing high availability of NAS shared services, so as to improve the effectiveness and efficiency of switching of NAS shared services.

In order to solve the above technical problems, the present invention provides a method for realizing high availability of NAS shared services, the method comprising:

When any controller in the multi-control storage system establishes a NAS sharing service, save a copy of the configuration information of the NAS sharing service in each controller of the multi-control storage system as a backup;

When a controller is down due to failure, analyze and judge according to the load status of each controller, and select a controller from all controllers except the down controller as the takeover controller;

Using the copy of the configuration information of the NAS shared service created by the downtime controller stored in the takeover controller, the takeover controller is made to establish the corresponding NAS shared service according to the copy.

Preferably, before using the copy of the NAS shared service configuration information of the down controller stored in the takeover controller, the method further includes:

Check the global disk matrix management authority table, authorize the takeover authority of the storage space in charge of the downtime controller to the takeover controller, and the takeover controller takes over the storage space in charge of the downtime controller.

Preferably, the method also includes:

When the downtime controller returns to normal after being repaired, synchronize the NAS sharing service configuration information among all controllers of the multi-control storage system;

Block the ongoing NAS sharing business on the takeover controller, and return the storage pool and disk matrix space belonging to the down controller;

According to the NAS sharing service configuration information synchronized in the downtime controller, the NAS sharing service is established on the downtime controller, and the blocked NAS sharing service is continued to be executed.

Preferably, after synchronizing the NAS shared service configuration information among all the controllers of the multi-control storage system, it further includes:

Synchronize global disk matrix management authority information and global user management information among all controllers in the multi-controller storage system.

Preferably, after continuing to execute the blocked NAS sharing service, the method further includes: modifying the global disk array management authority information, and canceling the takeover authority of the takeover controller.

The present invention also provides a device for realizing high availability of NAS shared services, the device comprising:

The copy saving module is used to save a copy of the configuration information of the NAS sharing service in each controller of the multi-control storage system as a backup when any controller in the multi-control storage system establishes a NAS shared service;

The selection module is used to analyze and judge according to the load status of each controller when a controller is down due to a fault, and select a controller from all controllers except the downtime controller as the takeover controller;

The service establishment module is configured to use the copy of configuration information of the NAS shared service created by the downtime controller stored in the takeover controller, so that the takeover controller establishes the corresponding NAS shared service according to the copy.

Preferably, the device also includes:

The authorization module is used to check the global disk matrix management authority table, authorize the takeover authority of the storage space in charge of the downtime controller to the takeover controller, and the takeover controller takes over the storage space in charge of the downtime controller.

Preferably, the device also includes:

The first synchronization module is used to synchronize NAS sharing service configuration information among all controllers of the multi-control storage system after the downtime controller is repaired and restored to normal;

The blocking module is used to block the ongoing NAS sharing business on the takeover controller, and return the storage pool and disk matrix space belonging to the down controller;

The execution module is configured to establish a NAS sharing service on the downtime controller according to the NAS sharing service configuration information synchronized in the downtime controller, and continue to execute the blocked NAS sharing service.

Preferably, the device also includes:

The second synchronization module is used for synchronizing the global disk matrix management authority information and the global user management information among all the controllers of the multi-controller storage system.

Preferably, the device also includes:

The cancellation module is used to modify the management authority information of the global disk array, and cancel the takeover authority of the takeover controller.

A method and device for realizing high availability of NAS shared services provided by the present invention, when any controller in a multi-control storage system establishes a NAS shared service, saves a copy of the configuration information of the NAS shared service in the multi-controlled storage system Each of the controllers is used as a backup; when a controller is down due to a fault, analyze and judge according to the load status of each controller, and select a controller from all the controllers except the down controller as the backup. A takeover controller: using a copy of the configuration information of the NAS sharing service created by the downtime controller stored in the takeover controller, so that the takeover controller establishes a corresponding NAS sharing service according to the copy. It can be seen that in the process of taking over the NAS sharing service of the down controller, the copy of the configuration information of the NAS sharing service is used to establish the interrupted NAS sharing service, which optimizes the takeover process of the NAS sharing service, reduces the time-consuming takeover, and ensures that the user NAS Shared services will not be interrupted due to controller switching, and it is guaranteed that the switching will not cause any loss of shared data during the entire controller switching process, thereby improving the effectiveness and efficiency of NAS shared service switching.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a flow chart of a method for realizing high availability of NAS sharing services provided by the present invention;

FIG. 2 is a schematic diagram of NAS shared services when each controller is working normally;

FIG. 3 is a schematic diagram of NAS sharing services when a controller is down;

FIG. 4 is a schematic structural diagram of an apparatus for realizing high availability of NAS shared services provided by the present invention.

detailed description

The core of the present invention is to provide a method and device for realizing high availability of NAS shared services, so as to improve the effectiveness and efficiency of switching of NAS shared services.

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a flow chart of a method for realizing high availability of NAS sharing services provided by the present invention. The method includes:

S11: When any controller in the multi-control storage system establishes a NAS sharing service, save a copy of the configuration information of the NAS sharing service in each controller of the multi-control storage system as a backup;

Wherein, the configuration information of the NAS sharing service is the configuration file of the NAS client. Each controller of the multi-controller storage system stores a copy of the configuration information of the NAS sharing service established by any controller.

S12: When a controller is down due to a fault, analyze and judge according to the load status of each controller, and select a controller from all controllers except the down controller as the takeover controller;

Wherein, the downtime controller is a downtime controller.

S13: Utilize the copy of the configuration information of the NAS sharing service created by the downtime controller stored in the takeover controller, so that the takeover controller establishes a corresponding NAS sharing service according to the copy.

It can be seen that in the process of taking over the NAS sharing service of the downtime controller, the method uses a copy of the configuration information of the NAS sharing service to establish the interrupted NAS sharing service, optimizes the NAS sharing service takeover process, and reduces the time-consuming takeover. It ensures that user NAS sharing services will not be interrupted due to controller switching, and ensures that switching will not cause any loss of shared data during the entire controller switching process, thereby improving the effectiveness and efficiency of NAS sharing service switching.

It should be noted that the NAS sharing service described in the present invention mainly refers to the SMB sharing service and the NFS sharing service.

Wherein, before using the copy of configuration information of the NAS shared service of the downtime controller stored in the takeover controller, check the global disk matrix management authority table, and authorize the takeover authority of the storage space that the downtime controller is responsible for to the takeover controller, The takeover controller takes over the storage space that the down controller is responsible for.

Preferably, the method further comprises the steps of:

S21: When the downtime controller returns to normal after being repaired, synchronize the NAS shared service configuration information among all controllers of the multi-controller storage system;

S22: block the ongoing NAS sharing business on the takeover controller, and return the storage pool and disk matrix space belonging to the down controller;

S23: According to the NAS sharing service configuration information synchronized in the downtime controller, establish a NAS sharing service on the downtime controller, and continue to execute the blocked NAS sharing service.

Wherein, after the NAS shared service configuration information is synchronized among all the controllers of the multi-control storage system, the global disk matrix management authority information and the global user management information are synchronized among all the controllers of the multi-control storage system.

Wherein, after continuing to execute the blocked NAS sharing service, modify the management authority information of the global disk array, and cancel the takeover authority of the takeover controller.

Based on the above optimization, it can be seen that this method reduces the time-consuming process of takeover and switchback by optimizing the process of NAS shared service takeover and switchback, and realizes the characteristics of a specific NAS sharing protocol to ensure that users' NAS shared services will not be switched due to controllers. And interrupt. And by establishing the global disk matrix permission table and global user configuration table, as well as the global configuration information and the backup synchronization mechanism of NAS shared services of each controller, the configuration consistency of NAS shared services is guaranteed. The consistency of stored data is guaranteed through the implementation of specific data protection modules, specific read-write modes, and specific operations during controller switching. In addition, the takeover and switchback process of the NAS sharing service is transparent to the users of the NAS sharing service, which improves user experience.

In short, this method ensures the effective switching of NAS shared services, ensures that user NAS shared services are not interrupted during the controller switching process, user NAS services will only return to normal after a short delay, and ensures that switching is not interrupted during the entire controller switching process. Any loss of shared data will result.

Based on the method for realizing high availability of NAS shared services provided by the present invention, specifically, firstly, a process of establishing NAS shared services is performed. When the user establishes the NAS sharing service, he chooses the synchronous mode to establish it. In this mode, the shared data will be returned to the user's call interface only after it is written into the storage pool. Although there will be a certain amount of write performance loss, the data Security is provided by storage pools.

Wherein, the multi-control system maintains a global configuration information of each controller's authority to manage the shared matrix, and multiple copies of the configuration information are saved in each controller. Under normal circumstances, each controller is only responsible for providing NAS sharing services for some specific storage spaces. When the controller is in the takeover state, the takeover controller is responsible for NAS sharing services on the storage space of the down controller.

After the configuration information of the newly established NAS sharing service is established locally, it will be written to the copies of multiple controllers according to the algorithm rules to prevent the loss of configuration information after the current controller goes down. At the same time, the relevant background program will regularly check whether the copies are consistent, and if they are inconsistent, they will be synchronized.

The multi-control storage system adopts the global user configuration method, and the operations on user accounts and permissions on each controller will be written into the global user configuration information at the same time, and the configuration information will have multiple copies on multiple controllers middle. At the same time, there will be a system background program responsible for regularly checking whether the copies are consistent, and if they are inconsistent, they will be synchronized according to the algorithm rules.

Then carry out the controller takeover process. When a controller has a serious software and hardware error and goes down, the system will block the ongoing NAS sharing business, that is, the SMB sharing and NFS sharing business, and enter the following takeover process:

(1) The multi-control system will select the most suitable takeover controller according to the judgment conditions such as the load of each controller. It is also responsible for checking the global disk matrix management authority table, and granting the takeover authority to the takeover controller for the storage space that the downtime controller is responsible for;

(2) After the takeover controller receives the command, refer to the global disk matrix management authority table, and take over the storage pool that the downtime controller is responsible for the storage space;

(3) Then according to the configuration information of the NAS shared service of the downtime controller of the backup, that is, the configuration file of the NAS shared service, mount the corresponding file system from the storage pool taken over, and then set up the corresponding NAS shared service;

(4) Unblock the blocked network and restore the original NAS sharing service.

Among them, the multi-control storage system supports the SMB3.0 protocol and NFSv3 protocol features. During the takeover process of the controller, the blocked NAS sharing service will not be interrupted, and the data transmission will continue after the takeover is completed.

Finally, the switchback process of the controller is performed. When the down controller returns to normal after fault repair, the global disk matrix management authority information, global user management information and NAS shared service configuration information will be synchronized. The multi-control system notifies the takeover controller to perform the switchback operation. The specific process is: the takeover controller blocks the ongoing NAS sharing service; First, take over the disk matrix space and storage pool, and mount the corresponding file system; according to the configuration information of the latest NAS sharing service that is synchronized, that is, the configuration file of the NAS sharing service, establish the NAS sharing service and continue the blocked NAS sharing service; finally The multi-control storage system modifies the global disk matrix management authority information, and cancels the takeover authority of the takeover controller.

It can be seen that by configuring the global user management and disk matrix information, as well as the backup and synchronization mechanism of the configuration information of the NAS shared service, basic support is provided for the takeover and switchback of the NAS shared service when the controller is switched. The operations and specific procedures during the takeover and switchback of the NAS shared service improve the stability and efficiency of the NAS shared service handover. FIG. 2 is a schematic diagram of a NAS sharing service when each controller is working normally; FIG. 3 is a schematic diagram of a NAS sharing service when a controller fails. In Figure 2, the NAS client D is connected to the controller A, and there is a shared link with the controller A, and the service is shared between the controller A and the NAS client D, and the shared service of the controller A is the service shared by the controller A , the NAS client D can obtain the services shared by the controller A, the controller A manages the disk disk1 and the disk disk2, and the controller A can share the data in the disk disk1 and the disk disk2. In Figure 3, when controller A goes down, controller B takes over the shared business of controller A, that is, takes over the shared business of controller A, and both disk1 and disk2 are taken over by controller B, which manages the disks disk3 and disk disk4.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a device for achieving high availability of NAS sharing services provided by the present invention. The device includes:

The copy saving module 101 is used to save a copy of the configuration information of the NAS sharing service in each controller of the multi-control storage system as a backup when any controller in the multi-control storage system establishes a NAS shared service;

The selection module 102 is used to analyze and judge according to the load status of each controller when a controller is down due to a fault, and select a controller as a takeover controller from all controllers except the downtime controller ;

The service establishment module 103 is configured to use the copy of the configuration information of the NAS shared service created by the downtime controller stored in the takeover controller, so that the takeover controller establishes the corresponding NAS shared service according to the copy.

Preferably, the device also includes:

The authorization module is used to check the global disk matrix management authority table, authorize the takeover authority of the storage space in charge of the downtime controller to the takeover controller, and the takeover controller takes over the storage space in charge of the downtime controller.

The device also includes:

The first synchronization module is used to synchronize NAS sharing service configuration information among all controllers of the multi-control storage system after the downtime controller is repaired and restored to normal;

The blocking module is used to block the ongoing NAS sharing business on the takeover controller, and return the storage pool and disk matrix space belonging to the down controller;

The execution module is configured to establish a NAS sharing service on the downtime controller according to the NAS sharing service configuration information synchronized in the downtime controller, and continue to execute the blocked NAS sharing service.

The device also includes:

The second synchronization module is used for synchronizing the global disk matrix management authority information and the global user management information among all the controllers of the multi-controller storage system.

The device also includes:

The cancellation module is used to modify the management authority information of the global disk array, and cancel the takeover authority of the takeover controller.

In the device for realizing high availability of NAS sharing services provided by the present invention, when any controller in the multi-control storage system establishes NAS sharing services, the copy saving module saves a copy of the configuration information of the NAS sharing services in the multi-control storage Each controller in the system is used as a backup; when a controller is down due to a fault, the selection module analyzes and judges according to the load status of each controller, and selects the controller from all controllers except the downtime controller. One controller acts as a takeover controller; the service establishment module utilizes a copy of configuration information of the NAS shared service created by the downtime controller stored in the takeover controller, so that the takeover controller establishes a corresponding NAS shared service according to the copy. It can be seen that in the process of taking over the NAS sharing service of the down controller, the device uses the copy of the configuration information of the NAS sharing service to establish the interrupted NAS sharing service, optimizes the NAS sharing service takeover process, and reduces the time-consuming takeover. It ensures that user NAS sharing services will not be interrupted due to controller switching, and ensures that switching will not cause any loss of shared data during the entire controller switching process, thereby improving the effectiveness and efficiency of NAS sharing service switching.

A method and device for realizing high availability of NAS sharing services provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. the method realizing NAS shared service High Availabitity, it is characterised in that including:

When NAS shared service set up by any one controller in many controlled storage systems, the copy of the configuration information of NAS shared service is saved in each controller of many controlled storage systems as backup;

When a controller delays machine because fault causes, it is analyzed judging according to the load state of each controller, from all controllers except machine controller of delaying, selects a controller as adapter controller;

Utilize the copy of the configuration information of the NAS shared service that the machine controller of delaying of storage is set up in described adapter controller, make described adapter controller set up corresponding NAS shared service according to described copy.

2. the method for claim 1, it is characterised in that before the copy of the configuration information of the described NAS shared service utilizing the machine controller of delaying stored in described adapter controller, also include:

Checking overall situation disk matrix management authority list, the adapter permission grant of the memory space being responsible for by machine controller of delaying, to described adapter controller, is taken over the memory space that machine controller of delaying is responsible for by described adapter controller.

3. the method for claim 1, it is characterised in that described method also includes:

When described machine controller of delaying recovers after normally again through repairing, all of controller of many controlled storage systems synchronizes NAS shared service configuration information;

Block ongoing NAS shared service on adapter controller, give back the storage pool belonging to machine controller of delaying and disk space of matrices;

According to the NAS shared service configuration information synchronized in machine controller of delaying, delaying, machine controller is set up NAS shared service, continue executing with blocked NAS shared service.

4. method as claimed in claim 3, it is characterised in that described synchronize in all of controller of many controlled storage systems after NAS shared service configuration information, also includes:

The all of controller of many controlled storage systems synchronizes overall situation disk matrix management authority information and overall situation customer management information.

5. method as claimed in claim 3, it is characterised in that described in continue executing with blocked NAS shared service after, also include: amendment overall situation disk array administration authority information, cancel the adapter authority of adapter controller.

6. the device realizing NAS shared service High Availabitity, it is characterised in that including:

Copy preserves module, when setting up NAS shared service for any one controller in many controlled storage systems, is saved in each controller of many controlled storage systems using the copy of the configuration information of NAS shared service as backup;

Select module, for when a controller delays machine because fault causes, being analyzed judging according to the load state of each controller, select a controller from all controllers except machine controller of delaying as adapter controller;

Business sets up module, for utilizing the copy of the configuration information of the NAS shared service that the machine controller of delaying of storage is set up in described adapter controller, makes described adapter controller set up corresponding NAS shared service according to described copy.

7. device as claimed in claim 6, it is characterised in that also include:

Authorization module, is used for checking overall situation disk matrix management authority list, and the adapter permission grant of the memory space being responsible for by machine controller of delaying, to described adapter controller, is taken over the memory space that machine controller of delaying is responsible for by described adapter controller.

8. device as claimed in claim 6, it is characterised in that also include:

First synchronization module, for when described in delay machine controller through reparation again recover normal after, synchronization NAS shared service configuration information in all of controller of many controlled storage systems;

Blocking module, for blocking ongoing NAS shared service on adapter controller, gives back the storage pool belonging to machine controller of delaying and disk space of matrices;

Perform module, for according to the NAS shared service configuration information synchronized in machine controller of delaying, machine controller being set up NAS shared service delaying, continue executing with blocked NAS shared service.

9. device as claimed in claim 8, it is characterised in that also include:

Second synchronization module, for synchronizing overall situation disk matrix management authority information and overall situation customer management information in all of controller of many controlled storage systems.

10. device as claimed in claim 8, it is characterised in that also include:

Cancel module, be used for revising overall situation disk array administration authority information, cancel the adapter authority of adapter controller.