Jennifer Myia Johnson
Physician at Chambers Dr, Boulder, CO
License number
Colorado 43964
Issued Date
Sep 2, 2005
Renew Date
May 1, 2015
Expiration Date
Apr 30, 2017
Type
Physician
Address
Address
1320 Chambers Dr, Boulder, CO 80305
Professional information
System And Method For Synchronizing A Data Copy Using An Accumulation Remote Copy Trio Consistency Group
US Patent:
6643671, Nov 4, 2003
Filed:
Aug 27, 2001
Appl. No.:
09/939150
Inventors:
Michael S. Milillo - Louisville CO
Christopher J. West - Boulder CO
David G. Hostetter - Superior CO
Robert P. Eskenberry - Broomfield CO
Jennifer Johnson - Boulder CO
Christopher J. West - Boulder CO
David G. Hostetter - Superior CO
Robert P. Eskenberry - Broomfield CO
Jennifer Johnson - Boulder CO
Assignee:
Storage Technology Corporation - Louisville CO
International Classification:
G06F 1730
US Classification:
707204, 707202, 707203, 711161, 711162, 711165
Abstract:
A system and method for synchronizing a data copy include in one embodiment first and second remote copy trios, each with source, target, and secondary volumes. Source volumes store initial data files, execute write commands to generate updated data files, and generate records of the write commands. Target volumes receive copies of the initial data files and the write command records, and transmit the copies of the initial data files and data indicated by the write command records to secondary volumes. Secondary volumes store the copies of the initial data files and the data indicated by the write command records, which are available for use in generating copies of the updated data files. The target volumes transmit to the secondary volumes in series relative to each other so that consistency is maintained at all times across the source volumes.
Automatic Stand Alone Recovery For Peer To Peer Remote Copy (Pprc) Operations
US Patent:
6499112, Dec 24, 2002
Filed:
Mar 28, 2000
Appl. No.:
09/537698
Inventors:
Michael Steven Milillo - Louisville CO
David G. Hostetter - Boulder CO
Brad David Privratsky - Thornton CO
Jennifer T. Johnson - Boulder CO
David G. Hostetter - Boulder CO
Brad David Privratsky - Thornton CO
Jennifer T. Johnson - Boulder CO
Assignee:
Storage Technology Corporation - Louisville CO
International Classification:
H02H 305
US Classification:
714 6, 711161, 711114
Abstract:
A method for use in a peer to peer remote copy (PPRC) system having primary and secondary storage systems to make data available from established PPRC storage volume pairs includes isolating the secondary storage system to be in a stand alone state such that access from any storage systems and hosts is prevented. It is then determined if each storage volume of the secondary storage system is part of an established PPRC storage volume pair. Each established PPRC storage volume pair is then terminated such that the storage volumes of the secondary storage system that are part of the established PPRC storage volume pairs are accessible to hosts. The secondary storage system is then made available to hosts to effect data recovery of the established PPRC storage volumes.
Variable Synchronicity Between Duplicate Transactions
US Patent:
2003012, Jun 26, 2003
Filed:
Dec 24, 2001
Appl. No.:
10/026547
Inventors:
David Hostetter - Superior CO, US
Michael Milillo - Louisville CO, US
Jennifer Johnson - Boulder CO, US
Christopher West - Erie CO, US
Michael Milillo - Louisville CO, US
Jennifer Johnson - Boulder CO, US
Christopher West - Erie CO, US
Assignee:
Storage Technology Corporation
International Classification:
G06F009/00
US Classification:
709/101000
Abstract:
A data processing system, computer program product, and data processing system for providing an adjustable level of synchronicity between duplicated transactions is disclosed. An acceptable level of lag between transactions is specified. Duplicated transactions performed at redundant systems are allowed to lag behind the corresponding transactions at the primary system by the specified amount of lag. Lag may be measured in terms of number of transactions, an amount of data, amount of time, or using any other suitable metric.