Richard M Ward

US Patent:

56995113, Dec 16, 1997

Filed:

Oct 10, 1995

Appl. No.:

8/540431

Inventors:

Thomas Joseph Porcaro - Austin TX
Theodore Clayton Waldron - Austin TX
Richard Byron Ward - Austin TX
Krishna Kishore Yellepeddy - Austin TX

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

39518508

Abstract:

An improved file system apparatus and method for minimizing the length of time a client system waits before declaring a data communication link disconnected. The apparatus and method dynamically modify a file system request time-out value based on the actual length of time required to service each file system request. In one embodiment, a time-out value is determined for each request type based on the actual response time and a buffer time for each request type. The response timer is based on readings from a system clock therefore operating as a low overhead process. A monitoring system periodically tests the server to ensure that a physical connection still exists.

US Patent:

61191515, Sep 12, 2000

Filed:

Mar 7, 1994

Appl. No.:

8/206706

Inventors:

Thomas George Cantrell - Austin TX
Sebnem Jaji - Austin TX
Amal Ahmed Shaheen - Austin TX
Richard Byron Ward - Austin TX

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

G06F 15167

US Classification:

709216

Abstract:

A cache manager efficiently supporting both connected and disconnected client operation. A single integrated cache is maintained for file system data, status and pathname information. File system requests are satisfied by the cache if possible and passed to a remote file system for servicing if necessary. The cache manager is independent of operating system file syntax and distributed file system protocol. Disconnected operation is supported through an aggressive caching policy and by logging of file system modifications. Modification logs are created when the client is disconnected by logging objects that optimize the log as it is created. Cache file system objects can have multiple parents each with different naming syntax because the object name is not cached.

Address:

9200 North Plz APT 2307, Austin, TX 78753

Phone:

5128210806

VIN:

1G1ZB5E15BF347154

Make:

CHEVROLET

Model:

MALIBU

Year:

2011