Intermediate write operation dispersed storage network frame

• US 8,654,789 B2
• Filed: 04/05/2011
• Issued: 02/18/2014
• Est. Priority Date: 04/26/2010
• Status: Expired due to Fees

• Current Assignee: Pure Storage, Inc.
• Original Assignee: Cleversafe Incorporated (International Business Machines Corporation)
• Inventors: Baptist, Andrew, Leggette, Wesley, Resch, Jason K., Motwani, Manish
• Primary Examiner(s): Jiang, Charles C
• Application Number:
  US13/080,490
• Publication Number:
  US 20110261840A1
• Time in Patent Office: 1,050 Days
• Field of Search: 370464-471, 707/609, 709208-216, 711/100
• US Class Current: 370/471
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 15/167 using a common memory, e.g. mailbox
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04L 69/26 Special purpose or proprietary protocols or architectures network applications for proprietary or special purpose networking environments H04L67/12

Abstract

A method begins by a processing module generating a payload of a dispersed storage network (DSN) frame regarding an intermediate write request operation by generating one or more transaction number fields of the payload to include one or more transaction numbers corresponding to a write request operation, wherein the intermediate write request operation is associated with the write request operation. The method continues with the processing module generating a protocol header of the DSN frame by generating a payload length field of the protocol header to include a payload length that represents a length of the one or more transaction number fields and generating remaining fields of the protocol header.

Claims

1. A method for a processing module of a computing device to execute an intermediate write request operation, the method comprises:

generating a payload of a dispersed storage network (DSN) frame regarding the intermediate write request operation by;

generating one or more transaction number fields of the payload to include one or more transaction numbers corresponding to a write request operation, wherein the intermediate write request operation is associated with the write request operation; and

generating a protocol header of the DSN frame by;

generating a payload length field of the protocol header to include a payload length that represents a length of the one or more transaction number fields; and

generating remaining fields of the protocol header.

2. The method of claim 1 further comprises:

outputting the DSN frame in order of the protocol header and the one or more transaction number fields.

3. The method of claim 1, wherein generating remaining fields of the protocol header comprises at least one of:

generating an operation code field to indicate a write commit request operation;

generating a protocol class field to indicate a protocol class for the write commit request operation;

generating a protocol class version field to indicate a protocol class version for the write commit request operation;

generating the operation code field to indicate a write rollback request operation;

generating the protocol class field to indicate a protocol class for the write rollback request operation; and

generating the protocol class version field to indicate a protocol class version for the write rollback request operation.

4. The method of claim 1, wherein the generating the one or more transaction numbers comprises at least one of:

receiving the one or more transaction numbers; and

selecting the one or more transaction numbers from a transaction number list.

5. The method of claim 1 further comprises:

generating a plurality of DSN frames regarding the intermediate write request operation, wherein the plurality of DSN frames includes the DSN frame.

6. A method for a processing module of a computing device to execute an intermediate write response operation, the method comprises:

generating a protocol header of a dispersed storage network (DSN) frame by;

generating an operation code field to indicate the intermediate write response operation;

generating a request number field to include a request number associated with an intermediate write request operation; and

generating remaining fields of the protocol header.

7. The method of claim 6, wherein generating the operation code field of the protocol header further comprises at least one of:

generating the operation code field to indicate a write commit response operation; and

generating the operation code field to indicate a write rollback response operation.

8. The method of claim 6, wherein generating the remaining fields of the protocol header comprises at least one of:

generating a protocol class field to indicate a protocol class for the intermediate write response operation;

generating a protocol class version field for the intermediate write response operation;

generating a payload length field of the protocol header to include a predetermined payload length value; and

generating a request/response field to indicate a response message.

9. The method claim 8 further comprises:

outputting, in order, the protocol class field, the protocol class version field, the operation code field, the request/response field, the request number field, and the payload length field.

10. A computer comprises:

an interface;

a memory; and

a processor operably coupled to the interface and to the memory, wherein the processor is operable to;

generate a payload of a dispersed storage network (DSN) frame regarding an intermediate write request operation by;

generating one or more transaction number fields of the payload to include one or more transaction numbers corresponding to a write request operation, wherein the intermediate write request operation is associated with the write request operation; and

generate a protocol header of the DSN frame by;

generating a payload length field of the protocol header to include a payload length that represents a length of the one or more transaction number fields; and

generating remaining fields of the protocol header.

11. The computer of claim 10, wherein the processor further functions to:

output, via the interface, the DSN frame in order of the protocol header and the one or more transaction number fields.

12. The computer of claim 10, wherein the processor functions to generate the remaining fields of the protocol header by at least one of:

generating an operation code field to indicate a write commit request operation;

generating a protocol class field to indicate a protocol class for the write commit transaction request operation;

generating a protocol class version field to indicate a protocol class version for the write commit transaction request operation;

generating the operation code field to indicate a write rollback request operation;

generating the protocol class field to indicate a protocol class for the write rollback request operation; and

generating the protocol class version field to indicate a protocol class version for the write rollback request operation.

13. The computer of claim 10, wherein the processor further functions to generate the one or more transaction numbers by at least one of:

receiving the one or more transaction numbers; and

selecting the one or more transaction numbers from a transaction number list.

14. The computer of claim 10, wherein the processor further functions to:

generate a plurality of DSN frames regarding the intermediate write request operation, wherein the plurality of DSN frames includes the DSN frame.

15. A computer comprises:

an interface;

a memory; and

a processor operably coupled to the interface and to the memory, wherein the processor is operable to;

generate a protocol header of a dispersed storage network (DSN) frame by;

generating an operation code field to indicate an intermediate write response operation;

generating a request number field to include a request number associated with an intermediate write request operation; and

generating remaining fields of the protocol header.

16. The computer of claim 15, wherein the processor further functions to generate the operation code field of the protocol header by at least one of:

generating the operation code field to indicate a write commit response operation; and

generating the operation code field to indicate a write rollback response operation.

17. The computer of claim 15, wherein the processor functions to generate the remaining fields of the protocol header by at least one of:

generating a protocol class field to indicate a protocol class for the intermediate write response operation;

generating a protocol class version field for the intermediate write response operation;

generating a payload length field of the protocol header to include a predetermined payload length value; and

generating a request/response field to indicate a response message.

18. The computer of claim 15, wherein the processor further functions to:

output, via the interface, in order, the protocol class field, the protocol class version field, the operation code field, the request/response field, the request number field, and the payload length field.