Motorola Corporation

Valentin Oprescu

Robert S Rosenthal

Manoj Dalmia

At start-up, input/output bus is scanned to detect any unprocessed I/O devices and each device is scanned to locate any unprocessed data base partitions. If any are located, these partitions are stored in memory and the partitions are marked as processed. During run-time, a message is received indicating that a new I/O device has come on-line. The new I/O device is scanned for any unprocessed partitions. The information regarding the partitions is stored in memory and the partition is marked as processed. The process also functions during data base operations to make connections between a client and a data base. A sequential process routes a connection request message through one node at a time around the network until all of the tables requested have been connected. If the message is returned to the originating node with out being completed, a failure is reported to the client. A parallel process broadcasts the connection request message to all of the nodes on the network simultaneously. Each node will then make local connections with any requested tables residing on that node and reply to the originating node. Once all of the replies are received, the originating node will collate the replies and assign tables to the client. In the event of duplicate table names, the rejected ones will be issued a disconnect.

Name resolution method for a distributed data base management system

A real-time database management system in which data generated by a producer process is buffered in a plurality of update buffers and transmitted asynchronously into a consumer process, such as a database management system, so that neither the producer process nor the consumer process has to halt operations during I/O requests and data is not lost.

Asynchronous operation in a database management system

In a real-time data base system, data is updated by reading the data and checking an exception flag associated with a locked status. If the exception flag is not set, the data is locked and read in an updatable fashion. If the data is locked, the data may still be read if a peek-mode access is requested.

Growing community of inventors

Glenview, IL, United States of America

Valentin Oprescu