Kevin T Vaughan

US Patent:

6418544, Jul 9, 2002

Filed:

Jun 22, 1999

Appl. No.:

09/338378

Inventors:

Richard Elderkin Nesbitt - Cary NC
Kevin Edward Vaughan - Apex NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1126

US Classification:

714 43, 709224

Abstract:

A method, system, and computer readable code for improving stress testing of Web servers. An altered form of client cache is used, enabling more realistic and representative client requests to be issued during the testing process. This altered cache format is referred to herein as a âmeta-cacheâ, and is defined as storing a minimal subset of the information that would typically be cached from a response. This minimal subset is that which enables constructing conditional HyperText Transfer Protocol (HTTP) GET requests. By providing a capability for realistically simulating conditional requests as well as unconditional requests, the stress applied to the server is more representative of the actual traffic load it will experience. By minimizing the amount of information kept in the meta-cache, this realistic simulation is possible without the overhead of a full client cache, and also allows more browsers to be simulated from a particular workstation.

US Patent:

7509633, Mar 24, 2009

Filed:

Dec 16, 2004

Appl. No.:

11/014593

Inventors:

Richard Elderkin Nesbitt - Holly Springs NC, US
Brian Marshall O'Connell - Cary NC, US
Kevin Edward Vaughan - Fuquay Varina NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/45

US Classification:

717140

Abstract:

A system for automatically segmenting the compilation of a large Java project under a controller node to a grid of slave nodes so as to reduce build time. A build tree scanner at the controller node sizes the number of files in the project and the length of each source file. Each slave node has a complete and synchronized set of all compilable units in the project. The controller node automatically segments the source files into a number of filesets commensurate with the number and resource capacities of slave nodes available for the build, allocates the filesets to the slave nodes, and automatically generates build filesets from a master dependency tree built from dependency trees constructed by each slave node. The build sets are then equitably allocated to the slave nodes. Then the targets are reaped and placed on the controller node, which performs post-compilation tasks.

US Patent:

7519684, Apr 14, 2009

Filed:

Sep 28, 2004

Appl. No.:

10/951489

Inventors:

Richard Andrew Backhouse - Apex NC, US
Srinivas Hasti - Raleigh NC, US
Scott Dilworth Johnson - Durham NC, US
Arvind Srinivasan - Raleigh NC, US
Kevin Edward Vaughan - Fuquay Varina NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/16

US Classification:

709218, 709201, 709203, 709219, 709223, 717101, 717104, 717117

Abstract:

Extensible URI-pattern-based servlet request processing frameworks process and respond to requests for resources sent over a network by client programs to application programs in multi-tiered data processing systems. An extension processor component, an improved web container; and an improved web application architecture form the framework. The extension processor component includes one or more extension processor factories, each of which generates a single type of extension processor to handle specific application components. Each extension processor is adapted to respond to a request having a declared pattern. The extension processor factory resides within the web container and provides a list of patterns for which it is responsible. The extension factory also instantiates an extension processor to respond to a request having a pattern that matches that extension processor's declared pattern. The improved web application includes a request mapper adapted to route a request having a particular pattern to the appropriate extension processor.

US Patent:

7543069, Jun 2, 2009

Filed:

Oct 18, 2004

Appl. No.:

10/967533

Inventors:

Srinivas Hasti - Raleigh NC, US
Gabriel Garcia Montero - Chapel Hill NC, US
Aravind Srinivasan - Raleigh NC, US
Renganathan Sundararaman - Cary NC, US
Kevin Edward Vaughan - Fuquay Varina NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/16

US Classification:

709228, 709217, 709218, 709219, 709229

Abstract:

Session state affinity is maintained in a workload balancing system that includes a hypertext transfer protocol (HTTP) routing server and a plurality of application servers. The application servers maintain backup session state information for a first session to a first server of the plurality of application servers at fewer than all of the plurality of application servers, detect the unavailability of the first application server at an application server of the plurality of application servers other than the first application and determine a second server that continues the first session. An identification of the second server and the first session is sent from an application server of the plurality of application servers to a HTTP routing server responsive to detecting the unavailability of the first server. The identification of the second server and the first session is received at the HTTP routing server and communications associated with the first session are routed from the HTTP routing server to the second server responsive to receiving the identification of the second server so that backup session state information maintained at the second server is used to continue the first session from the first server at the second server.

US Patent:

7797690, Sep 14, 2010

Filed:

Mar 15, 2005

Appl. No.:

11/081054

Inventors:

Richard Elderkin Nesbitt - Holly Springe NC, US
Brian Marshall O'Connell - Morrisville NC, US
Kevin Edward Vaughan - Apex NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 9/45

US Classification:

717153, 717154

Abstract:

System, process and program product for optimizing a computer program during run time. During run time, a determination is made whether the computer program calls a method which includes a conditional evaluation of a variable which is fixed and the evaluation of the fixed variable does not result in anything productive being accomplished except to return to execution of the computer program. If so, the call to the method which includes the conditional evaluation is deleted from the computer program for subsequent iterations of the computer program. Consequently, the subsequent execution of the computer program will yield a same result as if the conditional evaluation was executed. If the evaluation of the fixed variable results in something productive being accomplished, the call to the method which includes the conditional evaluation is not deleted from the subsequent execution of the computer program.

US Patent:

8001255, Aug 16, 2011

Filed:

Jan 5, 2006

Appl. No.:

11/325811

Inventors:

Richard E. Nesbitt - Holly Springs NC, US
Brian M. O'Connell - Cary NC, US
Herbert D. Pearthree - Cary NC, US
Kevin E. Vaughan - Apex NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/16

US Classification:

709229, 709203, 709233

Abstract:

System, method and program for transferring same files from a first computer to a plurality of second computers. Respective measures of file transfer rates from the first computer to the second computers are determined. Based on the respective measures of file transfer rates from the first computer to the second computers, determinations are made as to respective numbers of sockets within the first computer to transfer the files to the second computers to tend to equalize the time required to transfer the files from the first computer to each of the second computers. The files are transferred to each of the second computers using the determined number of sockets, wherein for each of the second computers where the number of sockets is greater than one, the files are divided between the number of sockets for transfer to the respective second computer. A greater number of sockets are used for those of the second computers for which the first computer has slower file transfer rates than for those of the second computers for which the first computer has greater file transfer rates.

US Patent:

8176051, May 8, 2012

Filed:

May 27, 2004

Appl. No.:

10/857782

Inventors:

Erik John Burckart - Raleigh NC, US
Madhu K. Chetuparambil - Raleigh NC, US
Rohit Dilip Kelapure - Durham NC, US
Jeffrey A. Lee - Morrisville NC, US
Aravind Srinivasan - Raleigh NC, US
Kevin Edward Vaughan - Fuquay Varina NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 17/30

US Classification:

707741, 707797, 707801

Abstract:

A system and method for searching a bytestream or other string in a case insensitive manner. In a preferred embodiment, the present invention includes an ASCII tree that associated both upper and lower case letters of an incoming header key (or other symbols) with nodes. When enough nodes are gathered, a target word is found.

US Patent:

20070064697, Mar 22, 2007

Filed:

Sep 8, 2005

Appl. No.:

11/221619

Inventors:

Richard Nesbitt - Holly Springs NC, US
Brian O'Connell - Cary NC, US
Herbert Pearthree - Cary NC, US
Kevin Vaughan - Apex NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 12/56

US Classification:

370392000

Abstract:

System, method and program for identifying a subset of a multiplicity of source networks. The subset including one or more source networks which have sent messages to one of a plurality of destination locations having a same IP address. For each of the multiplicity of source networks, a determination is made whether there are fewer intervening hops from the source network to the one destination location than from the source network to other of the plurality of destination locations. If so, the source network is included in the subset. If not, the source network is not included in the subset. One application of the present invention is to identify a source of a denial of service attack. After the subset is identified, filters can be sequentially applied to block messages from respective source networks in the subset to determine which source network in the subset is sending the messages.

Address:

8501 Summersweet Ln APT 26, Raleigh, NC 27612

VIN:

19UUA8F27AA005795

Make:

ACURA

Model:

TL

Year:

2010

Address:

4606 Asterwood Dr, Raleigh, NC 27606

VIN:

5J8TB18597A017236

Make:

ACURA

Model:

RDX TECHNOLOGY

Year:

2007