WATCHDOG PAGING (FAIL-SAFE FAILURE DETECTION AND SECURITY)
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2001-Dec-14
OBJECT Watchdog paging provides a fail-safe method of failure detection and security. OPERATION When the process of interest is operating in the non-failure mode it sends a page at regular time inter- vals. The Watchdog pager receives these pages and does not alert the supervisor. When the process fails it stops sending pages. The Watchdog pager will not receive a page within the specified time period and will time-out. Upon timing-out, the Watchdog pager alerts the supervisor indicating that the process has failed.