Browse Prior Art Database

Timestamp Synchronization for the OS/2 Database Manager Database Monitor

IP.com Disclosure Number: IPCOM000109523D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 56K

Publishing Venue

IBM

Related People

Jacobs, DC: AUTHOR

Abstract

A method is described which will provide a mechanism with which the user of the OS/2* Database Manager Database Event Monitor can synchronize the output produced on the client and server machines.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Timestamp Synchronization for the OS/2 Database Manager Database Monitor

       A method is described which will provide a mechanism with
which the user of the OS/2* Database Manager Database Event Monitor
can synchronize the output produced on the client and server
machines.

      When examining the output from the Database Manager Event
Monitor, it often necessary to consider the output from both the
database client  and the database server.

      When using the OS/2 Database Event Monitoring facility, the
user issues an API which activates it.  When a specified event
occurs, pertinent information is output to a memory buffer.  At
user-specified intervals, the buffer's contents are written to a disk
file.  This output activity continues until the Event Monitor has
been deactivated with another API or when other special events occur
such as an abend.  The data stored in the disk files consists of many
timestamped records.  These timestamps are generated based on the
system clock time on each workstation.

      The "proper" analysis of this information is contingent upon
the records in the client and server disk files being chronologically
"aligned".

      In the distributed environment, the database client and the
database server are often not within close geographic proximity.
Typically the system clocks are also not synchronized.  How does the
Database Manager Database Monitor user insure that the client and
server Event Monitor disk file...