Tuning The Failover Interval; Failover Interval Parameters In Cluquorumd; Qla2200 Features And Configuration Requirements - Red Hat CLUSTER MANAGER - INSTALLATION AND Administration Manual

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Table A–4 QLA2200 Features and Configuration Requirements
Host Bus
Adapter
QLA2200
(minimum driver:
QLA2x00 V2.23
A.7 Tuning the Failover Interval
This section describes how to tune configurable parameters associated with the cluqourumd dae-
mon. These parameters control the amount of time that a healthy cluster member will grant a failed
cluster member prior to concluding that a failure has occurred. After this time interval has elapsed, the
healthy cluster member will power cycle the failed cluster member (depending on the type of power
switch in use) and resume services previously running on the failed member.
There are several parameters governing the amount of time prior to initiating failover, including the
following:
Table A–5 Failover Interval Parameters in cluquorumd
Name
pingInterval
Appendix A:Supplementary Hardware Information
Features
Fibre Channel
arbitrated loop and
fabric
One channel
Default (sec.) Description
2
Single-Initiator
Configuration
Can be implemented
with point-to-point
links from the adapter
to a multi-ported
storage device.
Hubs are required to
connect an adapter
to a dual-controller
RAID array or to
multiple RAID
arrays.
The frequency at which cluquorumd updates its
on-disk state information and reads in the state of
the other cluster member.
Multi-Initiator
Configuration
Can be
implemented
with FC hubs
or switches