Data conversion method and backup server

• US 10,409,694 B2
• Filed: 05/07/2018
• Issued: 09/10/2019
• Est. Priority Date: 12/26/2016
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhang, Lei, Fu, Gaoding
• Primary Examiner(s): Padmanabhan, Mano
• Assistant Examiner(s): Edouard, Jean C
• Application Number:
  US15/972,527
• Publication Number:
  US 20180253359A1
• Time in Patent Office: 491 Days
• Field of Search: 711162
• CPC Class Codes: G06F 11/1435 using file system or storage system metadata
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1469 Backup restoration techniques
• CPC Class Codes: G06F 16/258 Data format conversion from or to a database
• CPC Class Codes: G06F 16/27 Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
• CPC Class Codes: G06F 16/955 using information identifiers, e.g. uniform resource locators [URL]
• CPC Class Codes: G06F 17/00 Digital computing or data processing equipment or methods, specially adapted for specific functions information retrieval, database structures or file system structures therefor G06F16/00

Abstract

In a method for implementing data conversion in a cloud data center, a backup server receives a read request from a block storage server. The read request includes a uniform resource locator (URL) address of a to-be-read virtual image object on the backup server and an address range of target data in the to-be-read virtual image object. The backup server obtains an address mapping bitmap and a storage path of backup data in a backup replica corresponding to the to-be-read virtual image object according to the URL address. Thereafter, the backup server obtains the target data from a storage device according to the address range of the target data and the address mapping bitmap and the storage path. Further, the backup server sends the target data to the block storage server. Hence, the conversion time of a backup data object may be shortened.

Claims

1. A method for implementing data conversion in a cloud data center, comprising:

receiving, by a backup server in the cloud data center, a read request from a block storage server in the cloud data center, the read request comprising a uniform resource locator (URL) address of a to-be-read virtual image object on the backup server and an address range of target data in the to-be-read virtual image object, and the backup server storing a virtual image object corresponding to a backup replica on a storage device in the cloud data center and a URL address of the virtual image object;

retrieving, by the backup server, an address mapping bitmap of backup data and a first storage path of the backup data in a backup replica corresponding to the to-be-read virtual image object based on the URL address of the to-be-read virtual image object;

obtaining, by the backup server, the target data from the storage device according to the address range of the target data and the address mapping bitmap and the first storage path of the backup data; and

sending, by the backup server, the target data to the block storage server.

2. The method of claim 1, further comprising:

obtaining, by the backup server, an identifier of the backup replica corresponding to the to-be-read virtual image object;

searching, by the backup server, a local database according to the identifier of the backup replica to obtain a second storage path of metadata in the backup replica corresponding to the to-be-read virtual image object;

retrieving, by the backup server, the metadata from the storage device according to the second storage path;

creating, by the backup server, the to-be-read virtual image object according to the metadata;

generating, by the backup server, the URL address of the to-be-read virtual image object; and

sending, by the backup server, the URL address to an image server.

3. The method of claim 1, wherein retrieving the address mapping bitmap and the first storage path comprises:

identifying, by the backup server, an identifier of the to-be-read virtual image object according to the URL address of the to-be-read virtual image object on the backup server;

retrieving, by the backup server, pre-stored metadata in the to-be-read virtual image object according to the identifier of the to-be-read virtual image object, the pre-stored metadata comprising a third storage path of the address mapping bitmap of the backup data in the backup replica corresponding to the to-be-read virtual image object and the first storage path; and

retrieving, by the backup server, the address mapping bitmap from the storage device according to the third storage path.

4. The method of claim 1, wherein obtaining the target data from the storage device comprises:

identifying, by the backup server, the backup data according to the address range of the target data and the address mapping bitmap when the address range of the target data is not larger than an address range of a backup data object in the backup replica corresponding to the to-be-read virtual image object;

retrieving, a third storage path of the backup data on the storage device according to the address mapping bitmap and the first storage path;

creating, by the backup server, a data read request comprising the third storage path and the address range of the target data for the backup data according to the third storage path;

sending, by the backup server, the data read request to the storage device; and

receiving, by the backup server, the target data from the storage device.

5. A backup server in a cloud data center, comprising:

a memory storing a computer-executable instruction; and

a processor coupled to the memory, the computer-executable instruction causing the processor to be configured to;

receive a read request from a block storage server in the cloud data center, the read request comprising a uniform resource locator (URL) address of a to-be-read virtual image object on the backup server and an address range of target data in the to-be-read virtual image object, and the backup server storing a virtual image object corresponding to a backup replica on a storage device in the cloud data center and a URL address of the virtual image object;

retrieving an address mapping bitmap of backup data and a first storage path of the backup data in a backup replica corresponding to the to-be-read virtual image object based on the URL address;

obtaining the target data from the storage device according to the address range of the target data and the address mapping bitmap and the first storage path of the backup data; and

sending the target data to the block storage server.

6. The backup server of claim 5, wherein the computer-executable instruction further causes the processor to be configured to:

obtain an identifier of the backup replica corresponding to the to-be-read virtual image object;

search a local database according to the identifier of the backup replica to obtain a second storage path of metadata in the backup replica corresponding to the to-be-read virtual image object;

retrieve the metadata from the storage device according to the second storage path;

create the to-be-read virtual image object according to the metadata;

generate the URL address of the to-be-read virtual image object; and

send the URL address to an image server.

7. The backup server of claim 5, wherein when retrieving the address mapping bitmap and the first storage path, the computer-executable instruction further causes the processor to be configured to:

identify an identifier of the to-be-read virtual image object according to the URL address of the to-be-read virtual image object on the backup server;

retrieve pre-stored metadata in the to-be-read virtual image object according to the identifier of the to-be-read virtual image object, the pre-stored metadata comprising a third storage path of the address mapping bitmap of the backup data in the backup replica corresponding to the to-be-read virtual image object and the first storage path; and

retrieve the address mapping bitmap from the storage device according to the third storage path.

8. The backup server of claim 5, wherein when obtaining the target data from the storage device, the computer-executable instruction further causes the processor to be configured to:

identify the backup data according to the address range of the target data and the address mapping bitmap when the address range of the target data is not larger than an address range of a backup data object in the backup replica corresponding to the to-be-read virtual image object;

retrieve a third storage path of the backup data on the storage device according to the address mapping bitmap and the first storage path;

create a data read request comprising the third storage path and the address range of the target data for the backup data according to the third storage path;

send the data read request to the storage device; and

receive the target data from the storage device.

9. A computer program product comprising a non-transitory computer readable storage medium storing program code thereon for implementing data conversion in a cloud data center, the program code comprising instructions for executing a method that comprises:

receiving, by a backup server in the cloud data center, a read request from a block storage server in the cloud data center, the read request comprising a uniform resource locator (URL) address of a to-be-read virtual image object on the backup server and an address range of target data in the to-be-read virtual image object, and the backup server storing a virtual image object corresponding to a backup replica on a storage device in the cloud data center and a URL address of the virtual image object;

retrieving, by the backup server, an address mapping bitmap of backup data and a first storage path of the backup data in a backup replica corresponding to the to-be-read virtual image object based on the URL address of the to-be-read virtual image object;

obtaining, by the backup server, the target data from the storage device according to the address range of the target data and the address mapping bitmap and the first storage path of the backup data; and

sending, by the backup server, the target data to the block storage server.

10. The computer program product of claim 9, further comprising:

obtaining, by the backup server, an identifier of the backup replica corresponding to the to-be-read virtual image object;

searching, by the backup server, a local database according to the identifier of the backup replica to obtain a second storage path of metadata in the backup replica corresponding to the to-be-read virtual image object;

retrieving, by the backup server, the metadata from the storage device according to the second storage path;

creating, by the backup server, the to-be-read virtual image object according to the metadata;

generating, by the backup server, the URL address of the to-be-read virtual image object; and

sending, by the backup server, the URL address to an image server.

11. The computer program product of claim 9, wherein retrieving the address mapping bitmap and the first storage path comprises:

identifying, by the backup server, an identifier of the to-be-read virtual image object according to the URL address of the to-be-read virtual image object on the backup server;

retrieving, by the backup server, pre-stored metadata in the to-be-read virtual image object according to the identifier of the to-be-read virtual image object, the pre-stored metadata comprising a third storage path of the address mapping bitmap of the backup data in the backup replica corresponding to the to-be-read virtual image object and the first storage path; and

retrieving, by the backup server, the address mapping bitmap from the storage device according to the third storage path.

12. The computer program product of claim 9, wherein obtaining the target data from the storage device comprises:

identifying, by the backup server, the backup data according to the address range of the target data and the address mapping bitmap when the address range of the target data is not larger than an address range of a backup data object in the backup replica corresponding to the to-be-read virtual image object;

retrieving, a third storage path of the backup data on the storage device according to the address mapping bitmap and the first storage path;

creating, by the backup server, a data read request comprising the third storage path and the address range of the target data for the backup data according to the third storage path;

sending, by the backup server, the data read request to the storage device; and

receiving, by the backup server, the target data from the storage device.