Patents by Inventor Eugene D. Pflueger
Eugene D. Pflueger 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: 9927980Abstract: Systems and techniques are provided for incremental Continuous Data Protection (iCDP) as a process to secure frequent, and space efficient, versions of consistent point-in-time images of a group of volumes using snapshot technology. The system provides for automation to create and manage frequent snapshots of defined groups of volumes. The incremental approach of the system described herein provides a convenient way to roll back to prior point-in-time versions to investigate data damage due to processing errors or other forms of corruption. Log space in log devices may be reclaimed in connection with managing recovery and roll back capabilities of the system to desired data versions for purposes of data protection. Point in time versions of a source device may be accessed through the source device. The particular point in time version accessed in servicing an I/O may be determined in accordance with one or more criteria.Type: GrantFiled: March 31, 2016Date of Patent: March 27, 2018Assignee: EMC IP Holding Company LLCInventors: Douglas E. LeCrone, Paul A. Linstead, Evan G. Jones, Eugene D. Pflueger, Amir Holtzman, Ning Wu
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Patent number: 7657718Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: GrantFiled: December 22, 2005Date of Patent: February 2, 2010Assignee: EMC CorporationInventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger
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Patent number: 7607037Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: GrantFiled: August 15, 2006Date of Patent: October 20, 2009Assignee: EMC CorporationInventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger
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Patent number: 7281157Abstract: A method and apparatus for enhancing data recovery in data processing systems in which applications span multiple logical devices. A data processing system includes multiple standard devices for storing data and corresponding BCV devices for, in one mode, operating as mirrors of those standard devices. If certain of those BCV devices are associated with the same data set, a CONSISTENT SPLIT operation controls the way in which each of these BCV devices is detached from its corresponding standard device and made available to another application. Each command to an application for controlling the BCV devices is translated into one or more request data structures that identify the BCV devices as being involved in a consistent split operation and that establishes a system lock out for those particular devices during which those devices are split from their respective devices in a consistent manner.Type: GrantFiled: February 24, 2004Date of Patent: October 9, 2007Assignee: EMC CorporationInventors: Douglas E. LeCrone, Eugene D. Pflueger
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Patent number: 7117386Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: GrantFiled: August 21, 2002Date of Patent: October 3, 2006Assignee: EMC CorporationInventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger
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Patent number: 7024528Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: GrantFiled: August 21, 2002Date of Patent: April 4, 2006Assignee: EMC CorporationInventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger
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Patent number: 6954835Abstract: A data-mirroring method in which, while an I/O process is processing a first I/O request for writing data to a first device, control is obtained from that I/O process executing on a host computer. A second I/O request, this one for writing the data to the second device, is then created. Then, control is returned to the I/O process by causing the first I/O request to be made available to a first data storage system managing the first device.Type: GrantFiled: October 30, 2002Date of Patent: October 11, 2005Assignee: EMC CorporationInventors: Douglas E. Lecrone, Paul A. Linstead, Daniel A. Murphy, Denis E. Hall, Raymond Wong, Eugene D. Pflueger, Kevin C. Heasley, Michael E. Specht, Stewart C. Woodworth, III
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Publication number: 20040193944Abstract: A method and apparatus for enhancing data recovery in data processing systems in which applications span multiple logical devices. A data processing system includes multiple standard devices for storing data and corresponding BCV devices for, in one mode, operating as mirrors of those standard devices. If certain of those BCV devices are associated with the same data set, a CONSISTENT SPLIT operation controls the way in which each of these BCV devices is detached from its corresponding standard device and made available to another application. Each command to an application for controlling the BCV devices is translated into one or more request data structures that identify the BCV devices as being involved in a consistent split operation and that establishes a system lock out for those particular devices during which those devices are split from their respective devices in a consistent manner.Type: ApplicationFiled: February 24, 2004Publication date: September 30, 2004Inventors: Douglas E. LeCrone, Eugene D. Pflueger
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Patent number: 6754682Abstract: A method and apparatus for enhancing data recovery in data processing systems in which applications span multiple logical devices. A data processing system includes multiple standard devices for storing data and corresponding BCV devices for, in one mode, operating as mirrors of those standard devices. If certain of those BCV devices are associated with the same data set, a CONSISTENT SPLIT operation controls the way in which each of these BCV devices is detached from its corresponding standard device and made available to another application. Each command to an application for controlling the BCV devices is translated into one or more request data structures that identify the BCV devices as being involved in a consistent split operation and that establishes a system lock out for those particular devices during which those devices are split from their respective devices in a consistent manner.Type: GrantFiled: July 10, 2000Date of Patent: June 22, 2004Assignee: EMC CorporationInventors: Douglas E. LeCrone, Eugene D. Pflueger
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Publication number: 20040039959Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: ApplicationFiled: August 21, 2002Publication date: February 26, 2004Inventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger
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Publication number: 20040039888Abstract: Described are techniques used in performing data replication processing. Data is replicated on a recovery site from a production site. When a disaster occurs, the state of the replication processing is determined and a restart copy of the data is made available from the recover site. Processing continues based on whether protection mode is desired such that the system executes using the recovery site as the restart with a replicated copy of the data. Data is propagated from the recovery site to the production site to resume operations and replication processing originating from the production site.Type: ApplicationFiled: August 21, 2002Publication date: February 26, 2004Inventors: Douglas E. LeCrone, Brett A. Quinn, Ronald G. Haupert, Gary H. Cox, Eugene D. Pflueger