A method for monitoring replica servers in a networked computer system is
provided, in which each server in the system has a replica partner vector
table that includes state information about other servers in the system.
The replica partner vector table includes data fields for storing an
update sequence number (USN) and timestamp information that identifies
the time of the last update and/or the time last successful replication
attempt for each replica server in the system. After each successful
replication, the server updates the entries in the replica partner vector
to reflect the updated USN and timestamp information. The replica
monitoring method evaluates the USN and timestamp entries in the replica
partner vector table to determine if any servers in the system are
latent. If the monitoring method detects that a server in the system is
latent, an alert is generated whereby users and/or a network
administrator are informed of the problem.