Resolving a protocol issue within a dispersed storage network

• US 8,938,552 B2
• Filed: 07/12/2011
• Issued: 01/20/2015
• Est. Priority Date: 08/02/2010
• 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.
• Primary Examiner(s): Nguyen, Dustin
• Application Number:
  US13/180,669
• Publication Number:
  US 20120030371A1
• Time in Patent Office: 1,288 Days
• Field of Search: 709/224, 709/232, 714/6.13, 714/42, 714/43, 714/769, 710/8, 710/15
• US Class Current: 709/236
• CPC Class Codes: H04L 1/24 Testing correct operation
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services

Abstract

A method begins by a processing module detecting a potential dispersed storage network (DSN) protocol issue that effects access of dispersed storage error encoded data within a DSN. The method continues with the processing module identifying a DSN entity based on the DSN protocol issue and generating a DSN protocol inquiry frame. The method continues with the processing module transmitting the DSN protocol inquiry frame to the DSN entity. The method continues with the processing module receiving a DSN protocol response frame from the DSN entity and resolving the DSN protocol issue based on the DSN protocol response frame.

Claims

1. A method comprises:

detecting a dispersed storage network (DSN) protocol issue that potentially adversely affects an ability to access dispersed storage error encoded data within a DSN;

identifying a DSN entity having the DSN protocol issue;

generating a DSN protocol inquiry frame;

transmitting the DSN protocol inquiry frame to the DSN entity;

receiving a DSN protocol response frame from the DSN entity; and

resolving, within the DSN entity, the DSN protocol issue based on the DSN protocol response frame to reduce the potential for adversely affecting access of the dispersed storage error encoded data;

wherein the resolving the DSN protocol issue comprises;

comparing a protocol information received via the DSN protocol response frame with a known protocol information to identify a common protocol and common protocol version;

generating a protocol selection frame that identifies the common protocol and the common protocol version; and

transmitting the protocol selection frame to the DSN entity.

2. The method of claim 1, wherein the detecting the potential DSN protocol issue comprises one or more of:

detecting a new DSN entity of the DSN;

detecting a boot up sequence;

receiving a communication failure message; and

receiving an error message.

3. The method of claim 1, wherein the detecting the potential DSN protocol issue comprises:

detecting a decode threshold failure regarding a read function of the dispersed storage error encoded data;

identifying a set of dispersed storage (DS) units of the DSN, wherein a DS unit of the sets of DS units stores an encoded data slice of the dispersed storage error encoded data and wherein the DSN entity is one of the set of DS units;

generating a set of DSN protocol inquiry frames that include the DSN protocol inquiry frame;

transmitting the set of DSN protocol inquiry frames to the set of DS units;

receiving DSN protocol response frames from at least some of the set of DS units; and

resolving the DSN protocol issue based on the DSN protocol response frames.

4. The method of claim 1, wherein the detecting the potential DSN protocol issue comprises:

detecting a system level operation for a general protocol inquiry of the DSN entity.

5. The method of claim 1, wherein the DSN entity comprises one of:

a dispersed storage (DS) unit;

a DS processing module;

a DS managing module;

a DS rebuilding module; and

a user device.

6. The method of claim 1, wherein the generating the DSN protocol inquiry frame comprises at least one of:

generating an operation code field to indicate the protocol discovery request operation;

generating a request number field to include a request number associated with the protocol discovery request operation;

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

generating a protocol class version field for the protocol discovery request 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 request message.

7. A method comprises:

receiving a dispersed storage network (DSN) protocol inquiry frame regarding a DSN protocol issue that potentially adversely affects an ability to access dispersed storage error encoded data within a DSN;

generating a DSN protocol response frame that includes protocol information;

transmitting the DSN protocol response frame to a requesting DSN entity; and

receiving a DSN protocol resolution frame from the requesting DSN entity, wherein the DSN protocol resolution frame includes information regarding resolving the DSN protocol issue to reduce the potential for adversely affecting access of the dispersed storage error encoded data;

wherein the DSN protocol resolution frame is a protocol selection frame that indicates a common protocol and common protocol version between protocol information included in the DSN protocol response frame and a known protocol.

8. The method of claim 7, wherein the generating the DSN protocol response frame comprises:

generating a payload to include one or more protocol fields and one or more corresponding version fields, wherein a protocol field of the one or more protocol fields indicates a supported protocol and a corresponding version field of the one or more corresponding version fields indicates a version of the supported protocol; and

generating a header by at least one of;

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

generating a request number field to include a request number associated with a protocol discovery request operation;

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

generating a protocol class version field for the protocol discovery response operation;

generating an operation code field to indicate the protocol discovery response operation; and

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

9. The method of claim 7 further comprises:

interpreting the DSN protocol resolution frame to identify a common protocol and a common protocol version; and

for access requests regarding the dispersed storage error encoded data, utilizing the common protocol in accordance with the common protocol version.

10. A computer comprises:

an interface;

a memory; and

a processing module operable to;

detect a dispersed storage network (DSN) protocol issue that potentially adversely affects an ability to access dispersed storage error encoded data within a DSN;

identify a DSN entity having the DSN protocol issue;

generate a DSN protocol inquiry frame;

transmit, via the interface, the DSN protocol inquiry frame to the DSN entity;

receive, via the interface, a DSN protocol response frame from the DSN entity; and

resolve, for the DSN entity, the DSN protocol issue based on the DSN protocol response frame to reduce the potential for adversely affecting access of the dispersed storage error encoded data;

wherein the processing module functions to resolve the DSN protocol issue by;

comparing a protocol information received via the DSN protocol response frame with a known protocol information to identify a common protocol and common protocol version;

generating a protocol selection frame that identifies the common protocol and the common protocol version; and

transmitting, via the interface, the protocol selection frame to the DSN entity.

11. The computer of claim 10, wherein the processing module functions to detect the potential DSN protocol issue by one or more of:

detecting a new DSN entity of the DSN;

detecting a boot up sequence;

receiving, via the interface, a communication failure message; and

receiving, via interface, an error message.

12. The computer of claim 10, wherein the processing module functions to detect the potential DSN protocol issue by:

detecting a decode threshold failure regarding a read function of the dispersed storage error encoded data;

identifying a set of dispersed storage (DS) units of the DSN, wherein a DS unit of the sets of DS units stores an encoded data slice of the dispersed storage error encoded data and wherein the DSN entity is one of the set of DS units;

generating a set of DSN protocol inquiry frames that include the DSN protocol inquiry frame;

transmitting, via the interface, the set of DSN protocol inquiry frames to the set of DS units;

receiving, via the interface, DSN protocol response frames from at least some of the set of DS units; and

resolving the DSN protocol issue based on the DSN protocol response frames.

13. The computer of claim 10, wherein the processing module functions to detect the potential DSN protocol issue by:

detecting a system level operation for a general protocol inquiry of the DSN entity.

14. The computer of claim 10, wherein the DSN entity comprises one of:

a dispersed storage (DS) unit;

a DS processing module;

a DS managing module;

a DS rebuilding module; and

a user device.

15. The computer of claim 10, wherein the processing module functions to generate the DSN protocol inquiry frame by at least one of:

generating an operation code field to indicate the protocol discovery request operation;

generating a request number field to include a request number associated with the protocol discovery request operation;

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

generating a protocol class version field for the protocol discovery request 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 request message.

16. A computer comprises:

an interface;

a memory; and

a processing module operable to;

receive, via the interface, a dispersed storage network (DSN) protocol inquiry frame regarding a DSN protocol issue that potentially adversely affects an ability to access dispersed storage error encoded data within a DSN;

generate a DSN protocol response frame that includes protocol information;

transmit, via the interface, the DSN protocol response frame to a requesting DSN entity; and

receive, via the interface, a DSN protocol resolution frame from the requesting DSN entity, wherein the DSN protocol resolution frame includes information regarding resolving the DSN protocol issue to reduce the potential for adversely affecting access of the dispersed storage error encoded data;

wherein the DSN protocol resolution frame is a protocol selection frame that indicates a common protocol and common protocol version between protocol information included in the DSN protocol response frame and a known protocol.

17. The computer of claim 16, wherein the processing module functions to generate the DSN protocol response frame by:

generating a payload to include one or more protocol fields and one or more corresponding version fields, wherein a protocol field of the one or more protocol fields indicates a supported protocol and a corresponding version field of the one or more corresponding version fields indicates a version of the supported protocol; and

generating a header by at least one of;

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

generating a request number field to include a request number associated with a protocol discovery request operation;

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

generating a protocol class version field for the protocol discovery response operation;

generating an operation code field to indicate the protocol discovery response operation; and

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

18. The computer of claim 16, wherein the processing module further functions to:

interpret the DSN protocol resolution frame to identify a common protocol and a common protocol version; and

for access requests regarding the dispersed storage error encoded data, utilize the common protocol in accordance with the common protocol version.