Real Time eXecutives, Inc.

Watchdog System for RTXHDB

The Watchdog System for RTXHDB is used to monitor data collection and variable behavior and to alarm accordingly. For example, if a collection list has stopped collecting for a specified period of time, the “Watchdog Alarm Notification” program will provide an external notification that a collection list has stopped. This Watchdog System for RTXHDB is comprised of one or more “Watchdog Scanning” programs and one or more “Watchdog Alarm Notification” programs, monitoring one or more selected watchdog databases. The “Watchdog Subset Scanning” program will periodically check one or more collection lists, resetting an appropriate timeout timer in the watchdog database each time a collection list’s subset time span has changed. The “Watchdog Variable Scanning” can be used to scan a variable’s recent history to determine if the variable is in alarm or has gone flat-line. A “Watchdog Alarm Notification” program checks each entry in the watchdog database to determine if the timeout time has expired.  If the timeout time expires, the notification program sets an alarm indicator in the watchdog database, displays the alarm notification, and optionally initiates an external task. 

Typically, a “Watchdog Scanning” program will reside on each gateway computer and scan the collection subsets being collected on that gateway.  Typically, a “Watchdog Alarm Notification” program will reside on the RTXHDB database/file server and/or on an RTXHDB administrator’s computer. The selected watchdog databases will typically reside on the RTXHDB database/file server. There may be any number of “Watchdog Scanning” programs, any number of  “Watchdog Alarm Notification” programs, and any number of selected watchdog databases. However, each “Watchdog Scanning” program can maintain its entries in only one selected watchdog database and each “Watchdog Alarm Notification” program can monitor only one selected watchdog database. The “Watchdog Scanning” and “Watchdog Alarm Notification” programs will operate on Windows NT 4.0, Windows 2000 or XP platforms. The “Watchdog Alarm Notification” program will run on Windows 95, 98, and ME platforms in a ‘Monitor-Only’ mode that will only display the status of the collection subsets being monitored and will not perform any external alarm notification. The “Watchdog Variable Scanning” can be used to watch specific variables for alarm conditions. This program works only with expression variables that specify alarm conditions. 





  • Windows 95 / 98 / Me / NT 4.0 / 2000 / XP Pro
  • Windows 2000 / XP Pro

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