Max L Smith

US Patent:

7404039, Jul 22, 2008

Filed:

Jan 13, 2005

Appl. No.:

11/036628

Inventors:

Max D Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711117, 711170

Abstract:

Methods and apparatus are provided for managing data in a hierarchal storage subsystem. A plurality of volumes is designated as a storage group for Level 0 storage; a threshold is established for the storage group; space is allocated for a data set to a volume of the storage group; the data set is stored to the volume; the threshold is compared with a total amount of space consumed by all data sets stored to volumes in the storage group. Data sets are migrated from the storage group to a Level 1 storage if the threshold is less than or equal to the total amount of space used by all of the data sets stored to volumes in the storage group. Thus, contention between migration and space allocation is reduced.

US Patent:

7716429, May 11, 2010

Filed:

Sep 14, 2007

Appl. No.:

11/855881

Inventors:

David Charles Reed - Tucson AZ, US
Jeffrey Thomas Sheridan - Tucson AZ, US
Max Douglas Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711154

Abstract:

An apparatus, system, and method are disclosed for dynamic address tracking. A token module creates a token for a job that accesses data in a storage system comprising a plurality of storage devices. The token comprises a job name. The job is a batch job. A storage module stores location information for the data accessed by the job in a token table. The location information is indexed by the token. In addition, the location information includes an input/output device name, an address space, a data set name, and a storage device name. A communication module receives a diagnostic command comprising the job name. The token module reconstructs the token using the job name. The storage module retrieves the location information indexed by the token in response to the diagnostic command.

US Patent:

7783609, Aug 24, 2010

Filed:

Jan 24, 2008

Appl. No.:

12/019628

Inventors:

Philip R. Chauvet - Tucson AZ, US
David C. Reed - Tucson AZ, US
Michael R. Scott - Tucson AZ, US
Max D. Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 7/00

US Classification:

707674

Abstract:

When a VTOC and a VVDS are established for information used to access data sets of a volume, unused space remains in both structures. The data sets, VTOC and VVDS are stored on a recordable medium. For VSAM data sets, other, vital information about the data set is also stored in the VTOC; for non-VSAM data sets, vital information about the data set is also stored in the VVDS. If the VOTC entry of a non-VSAM data set becomes corrupted, the vital information in the VVDS may be used to access the stored data set. Similarly, If the VVDS entry of a VSAM data set becomes corrupted, the vital information in the VTOC may be used to access the stored data set.

US Patent:

7890675, Feb 15, 2011

Filed:

Mar 5, 2009

Appl. No.:

12/398928

Inventors:

Herman Aranguren - Tucson AZ, US
David Bruce LeGendre - Tucson AZ, US
David Charles Reed - Tucson AZ, US
Max Douglas Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 3/00
G06F 13/00

US Classification:

710 56, 711137

Abstract:

An apparatus, system, and method are disclosed for dynamically allocating buffers during the execution of a job. A plan module sets a buffer allocation plan for the job using data access history that contains information about the number and nature of data access events in past executions of the same job. A buffer module allocates buffers during the execution of the job, and alters the buffer allocation to improve performance for direct access events for those portions of the job that the buffer allocation plan indicates have historically included predominantly direct access events. The buffer module alters the buffer allocation to improve performance for sequential access events for those portions of the job that the buffer allocation plan indicates have historically included predominantly sequential access events. A history module then collects data access information about the current execution and adds that information to the data access history.

US Patent:

7962615, Jun 14, 2011

Filed:

Jan 7, 2010

Appl. No.:

12/683747

Inventors:

Douglas L. Lehr - Tucson AZ, US
Franklin E. McCune - Tucson AZ, US
David C. Reed - Tucson AZ, US
Max D. Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/173

US Classification:

709224, 709226

Abstract:

Method, system, and computer program embodiments for reducing deadlock in multi-system computing environments are provided. A set of default, current wait times is initialized for resource requests of each of a plurality of resources. A plurality of resource holders and resource waiters is monitored within an address space. If one resource holder of the plurality of resource holders of one of the plurality of resources is determined to be one resource waiter on another of the plurality of resources, a current wait time for the one resource holder is incremented and a deadlock indicator for both the one resource holder and the one resource waiter is activated. Following expiration of a predefined interval, the plurality of resource holders and resource waiters are parsed through to determine an original resource holder, indicating a system deadlock. The resource holder associated with the system deadlock having a lowest current wait time is restarted.

US Patent:

7962803, Jun 14, 2011

Filed:

Sep 30, 2008

Appl. No.:

12/242849

Inventors:

Harold Steven Huber - Tucson AZ, US
Miguel Angel Perez - Tucson AZ, US
David Charles Reed - Tucson AZ, US
Max Douglas Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 45, 714 37

Abstract:

An apparatus, system, and method are disclosed for multi-address space tracing. A trigger module establishes a trigger event with a trace level. The trigger event occurs in at least a first address space of a plurality of address spaces. The trace level defines trace data to be stored from the plurality of address spaces. A monitor monitors messages communicated within and between the plurality of address spaces. A detection module detects the trigger event. A log module logs the trace data from the plurality of address spaces defined by the trace level in response to detecting the trigger event.

US Patent:

8005798, Aug 23, 2011

Filed:

Apr 30, 2009

Appl. No.:

12/433776

Inventors:

Douglas Lee Lehr - Tucson AZ, US
Franklin Emmert McCune - Tucson AZ, US
David Charles Reed - Tucson AZ, US
Max Douglas Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 17/30

US Classification:

707674

Abstract:

A method for data recovery of a data set migrated from a first storage media to a second storage media, where the data set includes a header record and multiple control records interleaved with corresponding data blocks. The header record is examined to identify a number of control records and data blocks comprising the data set. Next, the control records and data blocks are examined in order, starting with an initial data block, until a first data block is identified due to its failure to match the attribute included in the associated control record. Then the control records and data blocks are examined in reverse order, starting with a last data block, until a second data block is identified due to its failure to match an attribute included in the associated control record. Lastly, each data block from the first data block to the second data block are set to a lost data value.

US Patent:

8006003, Aug 23, 2011

Filed:

Feb 29, 2008

Appl. No.:

12/040687

Inventors:

Douglas Lee Lehr - Tucson AZ, US
Franklin Emmert McCune - Tucson AZ, US
David Charles Reed - Tucson AZ, US
Max Douglas Smith - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 3/00
G06F 13/00

US Classification:

710 39, 711158

Abstract:

An apparatus, system, and method are disclosed for enqueue prioritization. The apparatus for enqueue prioritization is provided with a plurality of modules configured to functionally execute the steps of holding one or more queued requests in a queue, sorting the queued requests according to a first priority identifier associated with each of the queued requests, and assigning a second priority identifier to a delayed request in response to a determination that the delayed request has resided in the queue for a predetermined length of time, wherein the second priority identifier indicates a higher priority than the first priority identifier indicates. These modules in the described embodiments include a queue module, a sorting module, and a reassignment module.