Systems and methods for system recovery

Patent metadata

Field	Value
Publication number	US-2023083327-A1
Application number	US-202218049279-A
Country	US
Kind code	A1
Filing date	Oct 24, 2022
Priority date	Apr 28, 2020
Publication date	Mar 16, 2023
Grant date	—

Abstract

A method for system recovery may be provided. The method may be implemented on a management server of a recovery system. The recovery system may further include at least one working server configured to perform one or more tasks and a global storage device configured to store a backup system or a system image file of each of the at least one working server. The management server may be connected to the at least one working server and the global storage device. The method may include, for each of the at least one working server, determining whether the working server is in an abnormal state. For each of the at least one working server, in response to determining that the working server is in an abnormal state, the method may further include assigning at least part of the global storage device to the working server and causing the working server to perform a first system recovery operation using the at least part of the global storage device.

First claim

What is claimed is:

1 . A system for system recovery, comprising:
at least one working server configured to perform one or more tasks; a global storage device configured to store a backup system or a system image file of each of the at least one working server; and a management server connected to the at least one working server and the global storage device, wherein the management server is configured to:
for each of the at least one working server,
determine whether the working server is in an abnormal state; and
in response to determining that the working server is in an abnormal state, assign at least part of the global storage device to the working server and cause the working server to perform a first system recovery operation using the at least part of the global storage device.

2 . The system of claim 1 , wherein the at least one working server, the global storage device, and the management server form a storage area network (SAN).

3 . The system of claim 1 , wherein the global storage device includes a plurality of global storage units, and to assign at least part of the global storage device to the working server and cause the working server to perform a first system recovery operation using the at least part of the global storage device, the management server is further configured to:
select a target global storage unit storing the backup system or the system image file of the working server from the plurality of global storage units; and assign the target global storage unit to the working server and cause the working server to perform the first system recovery operation using the target global storage unit.

4 . The system of claim 1 , wherein for each of the at least one working server, the working server is connected to a first local storage device, and to cause the working server to perform a first system recovery operation using the at least part of the global storage device, the management server is further configured to:
cause the working server to perform the first system recovery using the first local storage device; detect that the first system recovery operation using the first local storage device is not successful; and cause the working server to perform the first system recovery using the at least part of the global storage device.

5 . The system of claim 4 , wherein for each of the at least one working server, the management server is further configured to:
recover the first local storage device based on the backup system or the system image file of the working server; determine whether the first local storage device recovers successfully; and in response to determining that the first local storage device recovers successfully,
cause the working server to restart using the recovered first local storage device; and
cause the global storage device to be in a safe state under which the global storage device is inaccessible to the at least one working server and the management server.

6 . The system of claim 5 , wherein for each of the at least one working server, the management server is further configured to:
in response to determining that the first local storage device is not recovered successfully, cause the working server to keep operating using the at least part of the global storage device.

7 . The system of claim 1 , wherein the system further comprises at least one standby global storage device that stores the backup system or the system image file of each of the at least one working server.

8 . The system of claim 1 , wherein
a backup system or a system image file of the management server is stored in the global storage device, the system further comprises a standby management server configured to take over one or more tasks of the management server when the management server is in an abnormal state.

9 . The system of claim 8 , wherein when the management server is in an abnormal state, the standby management server is configured to assign at least part of the global storage device to the management server and cause the management server to perform a second system recovery operation using the at least part of the global storage device.

10 . The system of claim 8 , wherein the management server is connected to a second local storage device, and to cause the management server to perform a second system recovery operation using the at least part of the global storage device, the standby management server is further configured to:
cause the management server to perform the second system recovery using the second local storage device; detect that the second system recovery operation using the second local storage device is not successful; and cause the management server to perform the second system recovery operation using the at least part of the global storage device.

11 . A method implemented on a management server of a recovery system, the recovery system further comprising at least one working server configured to perform one or more tasks and a global storage device configured to store a backup system or a system image file of each of the at least one working server, the management server being connected to the at least one working server and the global storage device, and the method comprising:
for each of the at least one working server,
determining whether the working server is in an abnormal state; and
in response to determining that the working server is in an abnormal state, assigning at least part of the global storage device to the working server and causing the working server to perform a first system recovery operation using the at least part of the global storage device.

12 . The method of claim 11 , wherein the at least one working server, the global storage device, and the management server form a storage area network (SAN).

13 . The method of claim 11 , wherein the global storage device includes a plurality of global storage units, and the assigning at least part of the global storage device to the working server and causing the working server to perform a first system recovery operation using the at least part of the global storage device comprises:
selecting a target global storage unit storing the backup system or the system image file of the working server from the plurality of global storage units; and assigning the target global storage unit to the working server and cause the working server to perform the first system recovery operation using the target global storage unit.

14 . The method of claim 11 , wherein for each of the at least one working server, the working server is connected to a first local storage device, and the causing the working server to perform a first system recovery operation using the at least part of the global storage device comprises:
causing the working server to perform the first system recovery using the first local storage device; detecting that the first system recovery operation using the first local storage device is not successful; and causing the working server to perform the first system recovery using the at least part of the global storage device.

15 . The method of claim 14 , further comprising:
for each of the at least one working server,
recovering the first local storage device based on the backup system or the system image file of the working server;
determining whether the first local storage device recovers successfully; and
in response to determining that the first local storage device recovers successfully,
causing the working server to restart using the recovered first local storage device; and
causing the global storage device to be i

Assignees

• Zhejiang Dahua Technology Co

Inventors

• Wang Linfeng
• Wei Qiliang

Classifications

• Y02D10/00

  Energy efficient computing, e.g. low power processors, power management or thermal management · CPC title

• G06F11/2038 Primary

  with a single idle spare processing component · CPC title

• G06F11/2046

  where the redundant components share persistent storage (G06F11/2043 takes precedence) · CPC title

• G06F11/0793 Primary

  Remedial or corrective actions (recovery from an exception in an instruction pipeline G06F9/3861; by retry G06F11/1402; for recovering from a failure of a protocol instance or entity H04L69/40) · CPC title

• G06F2201/86

  Event-based monitoring · CPC title