Start/notes.ini Parameters/Server_Cluster_Probe_Timeout

Server_Cluster_Probe_Timeout

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Parameter: Server_Cluster_Probe_Timeout
Short description: Maximum wait time (in minutes) between cluster probe cycles – determines how quickly a failed cluster mate is detected.

Profile

Parameter
Server_Cluster_Probe_Timeout
Category
Cluster
Component
Server
Available since
R4.5
Supported versions
9.0.1, 10.0, 11.0, 12.0, 14.0, 14.5
GUI equivalent
Server document
Possible values
Integer in minutes, default 1 (recommended 1–2)

Description

In a Domino cluster, each server periodically sends “probes” to its mates to check their availability. Server_Cluster_Probe_Timeout sets the maximum interval in minutes between two probes. If the server does not receive a response within this period, the mate is considered down and failover operations (mail routing, application failover) are triggered.
The default value of 1 minute provides a good balance between fast detection and load; in stable LAN environments with lower requirements it can be raised to 2.

Example configuration

Server_Cluster_Probe_Timeout=1

Notes & pitfalls

  • Value in minutes, not seconds.
  • Set identically on all cluster mates.
  • Very low values increase cluster load and can trigger false positives during brief network hiccups.
  • Complemented by Cluster_Replicators (number of replicator threads) and Server_Cluster_Default_Port.
  • The change only takes effect after a server restart.