GB2411270B - Method and apparatus for recovery from loss of lock step - Google Patents

Method and apparatus for recovery from loss of lock step

Info

Publication number
GB2411270B
GB2411270B GB0509528A GB0509528A GB2411270B GB 2411270 B GB2411270 B GB 2411270B GB 0509528 A GB0509528 A GB 0509528A GB 0509528 A GB0509528 A GB 0509528A GB 2411270 B GB2411270 B GB 2411270B
Authority
GB
United Kingdom
Prior art keywords
recovery
loss
lock step
lock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0509528A
Other versions
GB0509528D0 (en
GB2411270A (en
Inventor
Kevin David Safford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/187,833 external-priority patent/US7085959B2/en
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Publication of GB0509528D0 publication Critical patent/GB0509528D0/en
Publication of GB2411270A publication Critical patent/GB2411270A/en
Application granted granted Critical
Publication of GB2411270B publication Critical patent/GB2411270B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1658—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2038—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant with a single idle spare processing component
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/1641—Error detection by comparing the output of redundant processing systems where the comparison is not performed by the redundant processing components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1629—Error detection by comparing the output of redundant processing systems
    • G06F11/165—Error detection by comparing the output of redundant processing systems with continued operation after detection of the error
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
    • G06F2201/845—Systems in which the redundancy can be transformed in increased performance
GB0509528A 2002-07-03 2003-06-30 Method and apparatus for recovery from loss of lock step Expired - Fee Related GB2411270B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/187,833 US7085959B2 (en) 2002-07-03 2002-07-03 Method and apparatus for recovery from loss of lock step
GB0315295A GB2392520B (en) 2002-07-03 2003-06-30 Method and apparatus for recovery from loss of lock step

Publications (3)

Publication Number Publication Date
GB0509528D0 GB0509528D0 (en) 2005-06-15
GB2411270A GB2411270A (en) 2005-08-24
GB2411270B true GB2411270B (en) 2005-12-21

Family

ID=35447633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0509528A Expired - Fee Related GB2411270B (en) 2002-07-03 2003-06-30 Method and apparatus for recovery from loss of lock step

Country Status (1)

Country Link
GB (1) GB2411270B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589066A (en) * 1984-05-31 1986-05-13 General Electric Company Fault tolerant, frame synchronization for multiple processor systems
US6263452B1 (en) * 1989-12-22 2001-07-17 Compaq Computer Corporation Fault-tolerant computer system with online recovery and reintegration of redundant components

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589066A (en) * 1984-05-31 1986-05-13 General Electric Company Fault tolerant, frame synchronization for multiple processor systems
US6263452B1 (en) * 1989-12-22 2001-07-17 Compaq Computer Corporation Fault-tolerant computer system with online recovery and reintegration of redundant components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE Journal of Solid-State Circuits, Vol 27, No. 1, January 1992 (USA), Y Tamir, "Self-checking self-repairing computer nodes using the Mirror Processor", pages 4 to 16 *

Also Published As

Publication number Publication date
GB0509528D0 (en) 2005-06-15
GB2411270A (en) 2005-08-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080630