International Business Machines Corporation

Michael E Browne

Tara Lynn Astigarraga

Maria Rose Ward

Christina Ann Lara

Nancy J Finn

Louie Arthur Dickens

William Edward Atherton

Andrew Jason Lavery

Mario Alessandro Maldari

Nnaemeka Iriele Emejulu

Ye Liu

Ashwin Venkatraman

Christopher V Derobertis

Trevor E Carlson

Eric C Wieder

Stephanie A Schaum

Joseph Demczar

Eli M Dow

Jessie Yu

Sandra K Johnson

Andrew P Wack

Monica Jean Lemay

Marie R Laser

Glenn Rowan Wightwick

Robert J Brenneman

Colin James Parris

Sarah J Sheppard

Katherine June Pearsall

William J Huie

Laura M Reid

Kyle M Smith

Shariffa B Siewrattan

Evren O Baran

Bernadette Marie Wing

Justin F Paugh

Carole A Jannak

Rudolph John Younger, Iii

Derwin D Gavin

Various embodiments for management of multipath Input/Output (I/O) in a computing system by a processor device. Upon surpassing a threshold for at least one predetermined criterion associated with near timeouts/near misses in the multipath I/O, a system notification is provided that is usable by the processor device to perform a multipath layer path selection aimed at reducing near timeouts/near misses in the multipath I/O.

Tracking and factoring application near misses/timeouts into path selection and multipathing status

Described are a system and method for performing an automated quality assessment on a software program under test. A test automation system executes a test on a software program Data related to the test is automatically collected. The data includes first information determined by the test automation system in response to executing the test. The data further includes second information related to the test and received from a source other than the test automation system. The first information is analyzed. A quality assessment of the software program is generated from the analyzed first information and from the second information.

Software test automation systems and methods

Various embodiments for management and correlation of communication errors by a processor device. A log is maintained that records each assignment of a particular network identification (ID) with a specific device in a computer storage network, including at least one of a date the ID was assigned and a time the ID was assigned, such that a trace or review may later be performed to correlate the specific device with data associated with the device at the at least one of the date and the time for troubleshooting purposes.

Management and correlation of network identification for communication errors

Embodiments relate to method and computer program products which prioritize the logical units in a subgroup. Thereafter, in case of abnormal operation of the process for copying the consistency group from primary storage to secondary storage, low priority logical units of the subgroups of the consistency group are not copied from primary storage to secondary storage.

Ordering logical units in a subgroup of a consistency group

A method and system for monitoring and analyzing flow control of packets in a communications network which includes multiple data transmission paths. The communications network has a first data path including an initiating node and a target node. A test frame is generated by an initiator module of a program executed by a computer for transmission over the first data path. The initiator module transmits the test frame over the first data path from the initiating node to the target node, wherein the test frame records a starting timestamp recorded by the initiating node upon transmitting the test frame. The test frame records a half trip timestamp recorded by the target node upon the test frame being received by the target node. The test frame records an end timestamp recorded by the initiating node, upon the test frame being received at the initiating node from the target node.

Method and apparatus to monitor and analyze end to end flow control in an Ethernet/enhanced Ethernet environment

Methods, systems and computer program products for suspend profiles and hinted suspending. Exemplary embodiments include a suspend mode management method, including determining a task to perform in the computer system during a suspend period of the computer system, detecting a suspend event in the computer system, the suspend event initiating the suspend period and performing the task during the suspend period.

Suspend profiles and hinted suspending

A data processing system having a host computer including a key manager, a control unit connected to the host computer, a data storage unit (such as a tape drive) controlled by the control unit, and data storage medium for storing data thereon to be written to or read from by the data storage unit. The key manager stores a data structure having at least one record having a volume serial number, as start location, a length entry, and a key for encrypting and decrypting data on the data storage medium. A data storage medium (such as data tape) is mounted on the data storage unit, and a volume recorded on the tape is retrieved. The control unit retrieves the data structure from the key manager and matches the volume serial number recorded in the retrieved data structure with the volume serial number retrieved from the data storage medium. It they match, the control unit passes to the data storage unit, commands to turn on or turn off encryption dependent upon the location where data is written by the data storage unit onto the data storage medium, or to turn on or turn off decryption dependent upon the location where data is read by the data storage unit from the data storage medium.

Mapping encrypted and decrypted data via key management system

A cache page management method can include paging out a memory page to an input/output controller, paging the memory page from the input/output controller into a real memory, modifying the memory page in the real memory to an updated memory page and purging the memory page paged to the input/output controller.

Storage controller cache page management

A processor-implemented method for analyzing dropped or out of order data packets that are sent from an initiating device over a communications network is provided. The processor-implemented method may include receiving, by a processor, a predetermined plurality of test data packets from the initiating device over the communications network. At least one of the predetermined plurality of test data packets that are dropped or received out of order may be determined by the processor. A header portion corresponding to the at least one of the predetermined plurality of test data packets that are dropped or received out of order may then be accessed. The accessed header portion is sent, by the processor, to the initiating device, whereby the accessed header portion may include information associated with a device location at which the one or more of the predetermined plurality of test data packets are dropped or received out of order.

Detecting and isolating dropped or out-of-order packets in communication networks

A method which prioritizes the subgroups in a consistency group by usage and/or business process. Thereafter, in case of abnormal operation of the process for copying the consistency group from primary storage to secondary storage, only a portion of the subgroups of the consistency group are copied from primary storage to secondary storage.

Prioritizing subgroups in a consistency group

A method is provided for facilitating data replication in a storage system. A logical volume of a first storage array of a replicated pair is preconfigured with one or more logical volume attributes, which include a compressible configuration bit that indicates whether data blocks to be stored to that logical volume are compressible during replication. Subsequently, with receipt of a data block at the first storage array to be stored to the logical volume, a check of the compressible configuration bit is made to determine whether the data block is compressible during replication, and if so, the data block is compressed for replication. The compressible configuration bit is placed into the payload region of the data packet being replicated to the second storage array. At the second storage array, the compressible configuration bit is used to determine whether to uncompress the replicated data block.

Facilitating data compression during replication using a compressible configuration bit

Computer program product, system and method are provided for facilitating data replication in a storage system. A logical volume of a first storage array of a replicated pair is preconfigured with one or more logical volume attributes, which include a compressible configuration bit that indicates whether data blocks to be stored to that logical volume are compressible during replication. Subsequently, with receipt of a data block at the first storage array to be stored to the logical volume, a check of the compressible configuration bit is made to determine whether the data block is compressible during replication, and if so, the data block is compressed for replication. The compressible configuration bit is placed into the payload region of the data packet being replicated to the second storage array. At the second storage array, the compressible configuration bit is used to determine whether to uncompress the replicated data block.

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Staatsburg, NY, United States of America

Michael E Browne