Systems and methods for combining data streams in a storage operation

• US 8,131,964 B2
• Filed: 12/15/2010
• Issued: 03/06/2012
• Est. Priority Date: 11/13/2003
• Status: Active Grant

• Current Assignee: CommVault Systems Incorporated
• Original Assignee: CommVault Systems Incorporated
• Inventors: Retnamma, Manoj Vijayan, Amarendran, Arun, Kottomtharayil, Rajiv
• Primary Examiner(s): Song, Jasmine
• Application Number:
  US12/969,389
• Publication Number:
  US 20110087851A1
• Time in Patent Office: 447 Days
• Field of Search: 711161-162, 711/165, 707/609, 707639-642, 707/647, 709/231
• US Class Current: 711/162
• CPC Class Codes: G06F 11/1458 Management of the backup or restore process
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1469 Backup restoration techniques

Abstract

Described herein are systems and methods for multiplexing pipelined data for backup operations. Various data streams are combined such as by multiplexing by a multiplexing module. The multiplexing module combines the data from the various data streams received by receiver module(s) into a single stream of chunks. The multiplexing module may combine data from multiple archive files into a single chunk. Additional modules perform other operations on the chunks of data to be transported such as encryption, compression, etc. The data chunks are transmitted via a transport channel to a receive pipeline that includes a second receiver module and other modules. The data chunks are then stored in a backup medium. The chunks are later retrieved and separated such as by demultiplexing for restoring to a client or for further storage as auxiliary copies of the separated data streams or archive files.

Claims

1. A method comprising:

receiving a first data stream comprising first data from a first application, wherein the first data comprises a first plurality of files, wherein the first data stream is created based on a first data retention policy associated with files, and wherein the first data stream is directed to a first storage media;

receiving a second data stream comprising second data from a second application, wherein the second data comprises a second plurality of files, wherein the second data stream is created based on a second data retention policy that is different than the first data retention policy, and wherein the second data stream is also directed to the first storage media; and

combining with at least one computer at least a portion of the first plurality of files from the first data stream and at least a portion of the second plurality of files from the second data stream into a first data chunk of one or more data chunks;

adding a first identifier to the first data chunk that identifies in the first data chunk, the portion of the first plurality of files from the first data stream; and

adding a second identifier to the first data chunk that identifies in the first data chunk, the portion of the second plurality of files from the second data stream.

2. The method of claim 1, wherein the first identifier is tag header that comprises the size of data written in the first data chunk from a corresponding data stream.

3. The method of claim 1, wherein the first data is obtained from a first archive file and the second data is obtained from a second archive file.

4. The method of claim 3, wherein the first archive file is associated with a first client computer and the second archive file is associated with a second client computer.

5. The method of claim 1, wherein said combining the data streams further comprises writing data from a single archive file into more than one data chunk.

6. The method of claim 1, wherein the first data and the second data comprise different types of data, and wherein each of the first and second data comprises at least one of the following types of data:

migration data, snapshot data, backup data and archive data.

7. The method of claim 1, wherein said receiving the first data stream and receiving the second data stream comprise receiving the first and second data in the same buffer.

8. The method of claim 1, wherein the first data stream comprises a backup stream.

9. The method of claim 8, wherein the first data is obtained from a tape medium.

10. The method of claim 1, wherein said combining the data streams comprises writing data into the first data chunk until the end of an archive file has been reached.

11. The method of claim 1, wherein combining the data streams comprises writing data into the first data chunk until the first data chunk reaches a predetermined size.

12. The method of claim 1, wherein combining the data streams comprises writing data into the first data chunk until a predetermined time has passed.

13. A system comprising:

one or more receivers executing in one or more computer processors configured to receive a first data stream comprising first data from a first application, wherein the first data comprises a first plurality of files, wherein the first data stream is created based on a first data retention policy, and wherein the first data stream is directed to a first storage media and a second data stream comprising second data from a second application, wherein the second data comprises a second plurality of files, wherein the second data stream is created based on a second data retention policy that is different than the first data retention policy, and wherein the second data stream is also directed to the first storage media; and

a multiplexer in communication with the one or more receivers, the multiplexer configured to combine the first and second data streams comprising the first and second plurality of files into a combined data stream,

wherein the multiplexer is further configured to add a first identifier to the first data chunk that identifies in the first data chunk, the portion of the first plurality of files from the first data stream, and

wherein the multiplexer is further configured to add a second identifier to the first data chunk that identifies in the first data chunk, the portion of the second plurality of files from the second data stream.

14. The system of claim 13, wherein the first identifier is tag header that comprises the size of data written in the first data chunk from a corresponding data stream.

15. The system of claim 13, wherein the first agent module and the data writer are part of the same local computing system such that the first data stream is not transmitted over an area network.

16. The system of claim 15, wherein the first data stream is transmitted via a bus.

17. The system of claim 13, wherein the first and second data streams are from the same client computer.

18. The system of claim 13, further comprising a data writer module is further configured to encrypt the data of the one data chunk.