International Business Machines Corporation

Brian Sean McCain

Jason Lee Peipelman

Paul Anthony Jennas, Ii

Philip Matthew Doatmas

Todd Charles Sorenson

Larry Juarez

David Montgomery

Joshua M Rhoades

Amy Lynn Therrien

Matthew John Ward

Dale Huber Anderson

David V Valverde

Michael Robert Groseclose, Jr

Dale Howard Anderson

Michael R Groseclose, Jr

Beth Ann Peterson

Juan A Coronado

Yan Xu

John Richard Paveza

Ezequiel Cervantes

Mario Francisco Acedo

Raymond Anthony James

Linda V Benhase

Richard Kenneth Martinez

John Donald Lauer

Veronica S Davila

Joseph Andrew Gimness

Glenn P Williamson

Jack Neil Licano, Jr

In one embodiment, pursuant to migrating the data from the first to the second storage medium, the data is allocated to the second storage medium while retaining an allocation of the data in the first storage medium. If the data is migrated from the second storage medium back to the first storage medium, the data is pointed to the allocation of the data in the first storage medium to alleviate data movement from the second storage medium to the first storage medium. If the allocation of the data in the first storage medium is determined to be needed for other data, the allocation of the data in the first storage medium is freed.

Optimization of data migration between storage mediums

A method for managing extents in a data storage system includes monitoring usage statistics for an extent residing on one or more powered-up storage devices. In the event the extent has not been accessed for specified period of time (as determined from the usage statistics), the method automatically compresses the extent and migrates the extent to an intermediate repository. Once the amount of data in the intermediate repository reaches a specified level, the method migrates the extent from the intermediate repository to one or more normally powered-down storage devices. If I/O is received for the extent while it resides in the normally powered-down storage devices or the intermediate repository, the method automatically migrates the extent from the normally powered-down storage devices or the intermediate repository to the normally powered-up storage devices. A corresponding apparatus and computer program product are also disclosed.

Data migration methodology for use with arrays of powered-down storage devices

A method for executing a software routine identified in a task object is provided. The method includes accessing a list of software routine identifiers associated with software routines that are executable on a computer server. The method further includes generating a task object generation command having at least a first software routine identifier, parameter data, and link task information and generating a second task object in response to the task object generation command. The second task object includes the first software routine identifier, the parameter data, and the link task information. The method further includes adding the second task object to a task execution queue on the computer server and executing the first software routine identified by the first software routine identifier in the second task object on the computer server to obtain at least a first result value, when the first flag value is a first predetermined value and the result parameter associated with the first task object corresponds to a second predetermined value.

Method for executing a software routine identified in a task object

A system and method for implementing dynamic interfaces in a JAVA program including methods having a common implementation and other methods to be handled independently. The system comprises a first dynamic proxy object implementing an invocation handler for providing default implementations; a separate object providing implementations of any method in a defined interface that requires independent handling; and, a second dynamic proxy object provided for checking a method definition object for an implementation of the method, and in response, one of: invoking the method on the separate object if the implementation exists, and if the implementation does not exist, invoking the method on the first dynamic proxy object. The second dynamic proxy object thus allows for a single implementation for repetitive methods, while allowing special cases to be handled independently.

Partial dynamic implementation of java interfaces

An apparatus, system, and method are disclosed for converting a synchronous interface into an asynchronous interface. The apparatus includes a receive module, a generate module, and a return module. The receive module receives a request for a transaction from a synchronous requester, the generate module generates a delaying object and a forwarding interface compatible with the requested return type, and the return module returns the delaying object with the forwarding interface to the requester. Additionally, services for implementing such an apparatus, system, and method are disclosed. Implementation of the apparatus, system, and method provide for increased computing performance, reduced application run time, and decreased usage of computing resources.

Apparatus, system, and method for converting a synchronous interface into an asynchronous interface

A technique for determining whether a server host supports the functions in a command sent by a client host. The client host formulates a command including a command object that contains parameter objects. The parameter objects, which represent the functions, are serialized, e.g., using the Java serialization command, and communicated to the server host. The server host attempts to deserialize the parameter objects. If it is successful, it is concluded that the server host supports the functions represented by the parameter objects. Or, it is concluded that the server host is incompatible with the functions represented by one or more parameter objects that cannot be deserialized. The server host may be a storage server, and the functions may be storage-related, such as a copy type to be performed.

Method and system for providing version control of parameters in a command-based API using java serialization

An enterprise network interface client application and a local, central electronic complex (CEC) in a dual CEC environment implement an alternative method of communication. Upon a send failure of a command to a first CEC in the environment, the command is sent to a second CEC using a CEC to CEC message mechanism. A method of communicating an asynchronous event is implemented between a microcode layer and an enterprise network interface client application in a dual central electronic complex (CEC) environment. A copy of the event is retained. Upon a send failure of the event to a first CEC in the environment, the copy of the event is sent to a second CEC in the environment.

Alternate communication path between ESSNI server and CEC

An apparatus, system, and method are disclosed for rendering multiple segment hypertext script. An identification module identifies a plurality of segments in a hypertext script. Each segment is delimited by at least one tag and includes an instruction for rendering a segment display region that is a portion of a display image described by the hypertext script. A calculation module calculates display coordinates for each segment display region. The display coordinates specify the spatial location and dimensions of the segment display region. A format module formats each segment as an independently displayable formatted segment hypertext script configured to be displayed within the corresponding segment display region. A rendition module renders each formatted segment hypertext script within the corresponding segment display region as a Java object using Java functionality.

Apparatus, system, and method for rendering multiple segment hypertext script

A plurality of broadcast messages are sent from at least one node of a plurality of nodes of a network. A node is discovered based on a received message. An entry is stored, wherein the entry corresponds to the node and a timestamp that indicates a time at which the node was last discovered. A notification is made that the node is offline, in response to determining that a predetermined time has elapsed since the timestamp was last updated.

Node discovery and communications in a network

The amount of code required to use the command pattern for client-server communications is reduced because, instead of creating separate commands for different actions, instructions required for an action are put into a single, abstract command, along with the required data. The command pattern, an object-oriented design pattern, describes a pattern for encapsulating instructions and data into a single object, called a command. A client application or a dynamic proxy uses the command pattern to encapsulate an identifier of a function to be performed at a server, and first data for use by the server in performing the function, into a command object, and provides the command object to a server host. The server host performs the function by associating instructions with the identifier and executing the instructions, using the first data, to obtain second data, and returns the command object with the second data to the client host.

Abstract mechanism for constructing commands for the command pattern

A technique for reducing the number of events that are transmitted by a server to a client in a client/server application programming interface (API). At the server host, each of different event messages is associated with at least one event category in a hierarchy of event categories. Each client host sends a registration request to the server host to inform the server host that the client host wants to receive only event messages that are associated with a specified event category. The server host associates the specified event category with each client host, and communicates only the event messages that are descendants of the specified event category.

Growing community of inventors

Tucson, AZ, United States of America

Brian Sean McCain