Patents by Inventor Rod N. Gamache
Rod N. Gamache has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8850018Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: GrantFiled: June 8, 2011Date of Patent: September 30, 2014Assignee: Microsoft CorporationInventors: Michael T. Massa, David A. Dion, Rajsekhar Das, Rushabh A. Doshi, David B. Lomet, Gor N. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit Jain, Sunita Shrivastava
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Patent number: 8850007Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: GrantFiled: June 8, 2011Date of Patent: September 30, 2014Assignee: Microsoft CorporationInventors: Michael T. Massa, David A. Dion, Rajsekhar Das, Rushabh A. Doshi, David B. Lomet, Gor N. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit Jain, Sunita Shrivastava
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Publication number: 20110238813Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: ApplicationFiled: June 8, 2011Publication date: September 29, 2011Applicant: Microsoft CorporationInventors: MICHAEL T. MASSA, David A. Dion, Rajsekhar Das, Rushabh A. Doshi, David B. Lomet, Gor N. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit Jain, Sunita Shrivastava
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Publication number: 20110238842Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: ApplicationFiled: June 8, 2011Publication date: September 29, 2011Applicant: Microsoft CorporationInventors: Michael T. Massa, David A. Dion, Rajsekhar Das, Rushabh A. Doshi, David B. Lomet, Gor N. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit Jain, Sunita Shrivastava
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Patent number: 7984155Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: GrantFiled: June 14, 2010Date of Patent: July 19, 2011Assignee: Microsoft CorporationInventors: Michael T. Massa, David A. Dion, Raj Das, Rushabh Doshi, David B. Lomet, Gor V. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit N. Jain, Sunita V. Nishanov
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Publication number: 20100250750Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: ApplicationFiled: June 14, 2010Publication date: September 30, 2010Applicant: MICROSOFT CORPORATIONInventors: MICHAEL T. MASSA, DAVID A. DION, RAJSEKHAR DAS, RUSHABH A. DOSHI, DAVID B. LOMET, GOR V. NISHANOV, PHILIP A. BERNSTEIN, ROD N. GAMACHE, ROHIT JAIN, SUNITA SHRIVASTAVA
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Patent number: 7774469Abstract: A method and system for increasing server cluster availability by requiring at a minimum only one node and a quorum replica set of replica members to form and operate a cluster. Replica members maintain cluster operational data. A cluster operates when one node possesses a majority of replica members, which ensures that any new or surviving cluster includes consistent cluster operational data via at least one replica member from the immediately prior cluster. Arbitration provides exclusive ownership by one node of the replica members, including at cluster formation, and when the owning node fails. Arbitration uses a fast mutual exclusion algorithm and a reservation mechanism to challenge for and defend the exclusive reservation of each member. A quorum replica set algorithm brings members online and offline with data consistency, including updating unreconciled replica members, and ensures consistent read and update operations.Type: GrantFiled: September 12, 2005Date of Patent: August 10, 2010Inventors: Michael T. Massa, David A. Dion, Rajsekhar Das, Rushabh Doshi, David B. Lomet, Gor V. Nishanov, Philip A. Bernstein, Rod N. Gamache, Rohit Jain, Sunita V. Shrivastava
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Patent number: 7584224Abstract: Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.Type: GrantFiled: April 13, 2004Date of Patent: September 1, 2009Assignee: Microsoft CorporationInventors: Luis Felipe Cabrera, Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache
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Publication number: 20040205077Abstract: Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.Type: ApplicationFiled: April 13, 2004Publication date: October 14, 2004Applicant: Microsoft CorporationInventors: Luis Felipe Cabrera, Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache
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Patent number: 6735603Abstract: Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.Type: GrantFiled: March 17, 2003Date of Patent: May 11, 2004Inventors: Luis Felipe Cabrera, Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache
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Publication number: 20030177109Abstract: Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.Type: ApplicationFiled: March 17, 2003Publication date: September 18, 2003Applicant: Microsoft CorporationInventors: Luis Felipe Cabrera, Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache
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Patent number: 6615256Abstract: The invention provides a method and system for arbitrating for ownership of a logical quorum resource, such as a logical quorum volume, comprising one or more physical quorum resources so as to form a storage network having a plurality of storage devices. Arbitration and volume management responsibilities are cleanly divided between cluster management software and volume management software. The cluster management software handles the arbitration process without knowing the details of how the logical quorum resource is formed. The volume management software handles the formation and management of the logical quorum volume without having details of the arbitration process.Type: GrantFiled: November 29, 1999Date of Patent: September 2, 2003Assignee: Microsoft CorporationInventors: Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache, Robert D. Rinne
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Patent number: 6553387Abstract: Volume configuration data management systems and methods are described. A logical volume provider maintains an epoch number on each of the extents comprising a volume. Upon each change in the configuration of the volume, the epoch number on each of the currently online extents is updated. When a volume is discovered and a request is made to bring the volume online, the logical volume provider can compare the epoch numbers on the extents to determine if the volume data is consistent across each of the extents, or if an extent contains stale data due to a transitory outage.Type: GrantFiled: November 29, 1999Date of Patent: April 22, 2003Assignee: Microsoft CorporationInventors: Luis Felipe Cabrera, Catharine van Ingen, Norbert P. Kusters, Rod N. Gamache