Non-invasive latency monitoring in a store-and-forward...

Details Non-invasive latency monitoring in a store-and-forward... Non-invasive latency monitoring in a store-and-forward...

2006-04-25

2006-04-25

Wiley, David (Department: 2143)

Electrical computers and digital processing systems: multicomput

Computer network managing

Computer network monitoring

C709S242000, C707S793000

Reexamination Certificate

active

07035922

ABSTRACT:
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.

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