International Business Machines Corporation

Arthur James Stagg

Bruce H Ratcliff

Stephen R Valley

Steven G Glassen

Eugene P Hefferon

Michael E Baskey

Anthony R Sager

Frank William Brice

Louis Frank Menditto

Donald W Schmidt

Daniel Francis Casper

Leslie W Wyman

Bala Rajaraman

Balachandar Rajaraman

Lynn Douglas Long

Lap Thiet Huynh

Frank W Brice

George B Markos

Raymond Edward Ward

John R Flanagan

Roy Frank Brabson

Janet R Easton

Allan Samuel Meritt

Mooheng Zee

Maurice Isrel

Wesley McMillan Devine

Edward Glen Britton

Kian-Bon K Sy

Patrick Gerald Brown

Fuyung Lai

Caglan M Aras

Kimi A Cousins

Linda Barrett

Luther B Griffin

Jerry Wayne Stevens

Kenneth J Oakes

David Bruce Lindquist

Mark Albert

Jeffrey Douglas Haggar

Michael G Fitzpatrick

Constantinos Kassimis

Linwood Hugh Overby, Jr

John Scott Houston

Jeffrey James Lynch

Carroll Eugene Fulkerson, Jr

Scott Allan Campbell

Masashi E Miyake

Patrick S O'Donnell

Dale C Gugliotta

John L Brady

Tu Van Nguyen

Yves J Huchet

Ralph J Potok, Ii

James Harold Ragsdale

Vicki Gentry Horton

George Allen Deaton, Jr

Wesley McMillian Devine

Claude Richard Pond

Robert M Teague

Charles E Williford

Masashi Edward Miyake

Robert Edward Holt, Ii

Methods, systems, and computer program products for dynamically modifying an application program's behavior in response to changing environmental conditions (such as network changes, system changes, and so forth). The application may solicit such information, and/or may receive unsolicited environmental change notifications. In response to a change notification, the application may take one or more of the following approaches to adapt to the changing conditions: (1) alter its execution; (2) modify its use of, or control of, other cooperating application; and (3) modify the selection of application execution threads. (An application might also decide to make no changes in its behavior.)

Dynamic modification of application behavior in response to changing environmental conditions

The substantially simultaneous tracing/monitoring of a plurality of sets of events via a single network interface. The plurality of events can be traced and/or monitored for one host or for a plurality of hosts coupled via the same network interface. The sets of events to be traced/monitored for a host are defined by the host and maintained in one or more configuration files. The configuration files may be dynamically updated.

Facilitating monitoring and simultaneously analyzing of network events of multiple hosts via a single network interface

Method for facilitating monitoring and simultaneously analyzing of network events of multiple hosts via a single network interface

Methods, systems and computer program products are provided for providing transactional quality of service providing transaction service level information from an application requesting a data transmission transaction to a communication process executing on a data processing system. The transaction service level information is provided separate from the data for the data transmission transaction. A quality of service level associated with the data transmission transaction is determined based on the transaction service level information received from the application. Other embodiments also provide for establishing a quality of service level without reference to transaction data content while further embodiments provide for establishing a quality of service level for responses.

Methods, systems and computer program products for providing transactional quality of service

Methods, systems, and computer program products for improving data transfer in complex computing environments. Internal routing enhancements are defined, which enable traffic of virtual servers to be processed more efficiently, thereby improving overall data transfer rates. Instead of performing routing operations in the Internet Protocol ('IP') layer of a networking stack, a 'mini-routing' table is created programmatically and is used to perform routing at the Data Link Control (&#x201c;DLC&#x201d;) layer. This technique avoids bottlenecks in the IP layer and speeds the data transfer process.

Fast path routing in a large-scale virtual server computing environment

An apparatus for providing direct data processing access in a network computing system environment. The system environment has a main storage which can be connected to one or more application servers and is in processing communication with an interface element. The interface element has at least one adapter and can be connected to one or more application user(s). One or more queues are established in the main storage that can handle data without causing interrupts in the running programs. Incoming data is received using the adapter and as data is received or modified, the status of the network computing system will be updated to reflect the new data or change. Data is then processed in the main storage after interrogating the multiple existing queues in the main storage simultaneously and forwarding them in turn to their appropriate destination or application server after a determination has been made by interrogating these queues.

Apparatus for providing direct data processing access using a queued direct input-output device

A value-based caching system and method. A value based cache method can include partitioning a cache into different value-based partitions. Data to be stored in the cache can be valued and the valued data can be cached in individual ones of the value-based partitions. Subsequently, cache entries can be evicted from the value-based partitions. Finally, the caching and evicting can be managed according to the valuing step. In this regard, the cache and eviction management step can ensure greater cache responsiveness for data having a greater value relative to other valued data.

Value based caching

A facility is provided to allow for dynamic configuration of data routing between TCP/IP stacks of multiple partitions of a multi-partition processing system and a network adapter such as a local area network (LAN) gateway for the multi-partition processing system. The facility includes a command for automatically providing the network adapter with information that a particular partition of the processing system is to function as a router; and using the information at the network adapter to forward data received across the network to the partition when the data is to an unregistered HOME internet protocol (IP) address. The forwarding of data to the router partition occurs without any conventional IP processing.

Facility for forwarding data from a network adapter to a router partition without internet protocol (ip) processing

A facility is provided to allow retrieval of specific parameters by a communications stack (e.g., TCP/IP) of a multi-partitioned processing system from a shared network adapter coupling the processing system to a network. The processing system includes multiple communications stacks, each of which registers internet protocol (IP) addresses with the network adapter in an address resolution table shared by the multiple communications stacks. The facility includes query request and reply commands for selectively retrieving specific data from the shared address resolution table, wherein the specific data can include: local registered IP addresses for a communications stack issuing a query request, network address resolution entries associated with a particular HOME IP address, HOME IP addresses of one or more other communications stacks sharing the network adapter, IP addresses owned by other entities on the network, IP addresses which are in the address cache, as well as other types of data.

Facility for retrieving data from a network adapter having a shared address resolution table

A method and an apparatus for providing configuration information without using a configuration file and using a Queued-Direct Input-Output device in a network computing environment having a plurality of hosts and at least one Gateway attachment and a channel interface. A set of special tables and commands at is provided at initialization time over the channel interface which in turn provides all configuration information. The information can be updated dynamically in these tables and for these commands at any time after initialization when information needs to be added, deleted or modified.

Method and apparatus for providing configuration information using a queued direct input-output device

A method of transferring data in a network computing environment having a controlling program and a main storage in processing communication with an interface element including one or more adapters. A queuing mechanism is first established in the main storage for asynchronous transmittal of data between the program and said interface element. At least one queue-set is dedicated to input data and another queue-set to output data in the queuing mechanism. Queuing priorities both for said input and output queue-sets are then determined according to importance of data to be processed or transferred or other internal dependencies and a queue-description record is established by passing a QDIO queue command. From this the priority and number of the output queue are provided by order in which the order specified in the queue descriptor record relative to any other output queues described in that record. Data is then transferred and received according to the queuing priority by interrogating multiple queues in the mechanism simultaneously and determining appropriate location to which data has to be stored to or transferred from.

Method of transferring data using an interface element and a queued direct input-output device

A method of providing direct data processing access in a network computing system environment. The system environment has a main storage which can be connected to one or more application servers and is in processing communication with an interface element. The interface element has at least one adapter and can be connected to one or more application user(s). One or more queues are established in the main storage that can handle data without causing interrupts in the running programs. Incoming data is received using the adapter and as data is received or modified, the status of the network computing system will be updated to reflect the new data or change. Data is then processed in the main storage after interrogating the multiple existing queues in the main storage and forwarding them in turn to their appropriate destination or application server after a determination has been made by interrogating these queues.

Method of providing direct data processing access using a queued direct input-output device

A computer program product and storage device used for exchange and transfer of data in a network computing system having a main storage capable of connecting to at least one application server and an interface element with at least one adapter capable of establishing processing communication with at least one application user(s). The program device comprises a a computer program storage device readable by a digital processing apparatus and a program means comprising the steps of: receiving incoming data using said adapter; setting up one or more queues in main storage without causing interrupts in any running programs; updating status of said network computing system to reflect said new data; processing data in said main storage by interrogating multiple existing queues in said main storage simultaneously; and determining from interrogating said queues appropriate application server to which said data has to be forwarded to; designating at least one set of queues in said queuing mechanism as input queues and another as output queues; issuing a signal adapter instruction to provide initiative to check content of any or all queues in said queuing mechanism; specifying initiate-output or initiate-input appropriately by means of said signal adapter instruction to cause associated adapter to asynchronously process said output or input queues; and causing synchronization by means of said signal adapter instruction by signaling said associated data queues to update all entries in order to render them current. The program product runs in the same environment and performs similar tasks.

Computer program product used for exchange and transfer of data having a siga vector and utilizing a queued direct input-output device

An apparatus for transferring data in a network computing environment having a controlling program and a main storage in processing communication with an interface element including one or more adapters. A queuing mechanism is first established in the main storage for asynchronous transmittal of data between the program and said interface element. At least one queue-set is dedicated to input data and another queue-set to output data in the queuing mechanism. Queuing priorities both for said input and output queue-sets are then determined according to importance of data to be processed or transferred or other internal dependencies and a queue-description record is established by passing a QDIO queue command. From this the priority and number of the output queue are provided by order in which the order specified in the queue descriptor record relative to any other output queues described in that record. Data is then transferred and received according to the queuing priority by interrogating multiple queues in the mechanism simultaneously and determining appropriate location to which data has to be stored to or transferred from.

Apparatus for transferring data using an interface element and a queued direct input-output device

A computer program device and product is provided for timely processing of data. The computer program device comprises a program storage device readable by a digital processing apparatus and a program means including instructions executable by the digital processing apparatus by designating at least one set of queues in the queuing mechanism as input queues and another as output queues; issuing a signal adapter instruction to provide initiative to check content of any or all queues in the queuing mechanism; specifying initiate-output or initiate-input appropriately by means of said signal adapter instruction to cause associated adapter to asynchronously process said output or input queues; and causing synchronization by means of said signal adapter instruction by signaling the associated data queues to update all entries in order to render them current. The computer program product is for use with a computer system and has a main storage in processing communication with an interface element having adapters for storing a queuing mechanism storing data. It comprises of a data storage device including a computer usable medium having computer readable program means for ensuring proper and timely processing of data, for dedicating at least one set of queues of the queuing mechanism as input queues and another set as output queues and for generating a signal adapter instruction designated to provide initiative to check content of any or all queues in said queuing mechanism.

Computer program device and product for timely processing of data using a queued direct input-output device

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Raleigh, NC, United States of America

Arthur James Stagg