Robert Mark Miner

US Patent:

54993679, Mar 12, 1996

Filed:

Oct 27, 1994

Appl. No.:

8/330100

Inventors:

Roger J. Bamford - Woodside CA
Forrest W. Howard - Berkeley CA
Dirk A. Kabcenell - Portola Valley CA
Robert N. Miner - San Francisco CA

Assignee:

Oracle Corporation - Redwood Shores CA

International Classification:

G06F 1730

US Classification:

395600

Abstract:

The present invention provides a distributed log system where the logs are distributed on a per client basis. That is, the clients are partitioned into subsets. Each subset of clients is assigned a log, and the the redo records of those clients are maintained in that log. This reduces contention bottlenecks, because the number of clients writing to any one log is limited. Also, all of a client's changes are stored in a single log. During a recovery process, the changes for a block of data may be stored in different logs. For proper recovery, the changes must be applied to the database in the order in which they were originally made. The present invention provides a system for ordering the log entries in the correct order by using a "sequence number". Each page of data in the database has an associated sequence number. When a change is made to that page, the sequence number is incremented.

US Patent:

46331280, Dec 30, 1986

Filed:

May 17, 1985

Appl. No.:

6/735380

Inventors:

Roy D. Roberts - Newark CA
Robert L. Miner - Palo Alto CA

Assignee:

ILC Technology, Inc. - Sunnyvale CA

International Classification:

H01J 6130
H01J 516

US Classification:

313113

Abstract:

A short arc type lamp having a concave reflecting wall including a convex space formed behind the concave wall such that the reflecting wall is relatively thin near the focal point of the lamp and relatively thicker radially outward. A copper sleeve member is attached to the reflecting wall within the convex space to conduct heat from the reflecting wall to the exterior wall of the lamp.