Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Environment File Variables for MetroCluster/CA
Appendix A 405
package can be successfully started. (Note: If this
variable is not exported, Raid Manager commands used
in this script may fail).
HORCMPERM
This variable supports the security feature, RAID
Manager Protection Facility on the Continuous Access
devices. (Note: If the RAID Manager Protection Facility
is disabled, set this variable to MGRNOINST. This is
the default value).
HORCTIMEOUT (Default=360)
This variable is used only in asynchronous mode when
the horctakeover command is issued; it is ignored in
synchronous mode. The value is used as the timeout
value in the horctakeover command, -t <timeout>.
The value is the time to wait while horctakeover
re-synchronizes the delta data from the PVOl to the
SVOL. It is used for swap-takeover and SVOL
takeover. If the timeout value is reached and a timeout
occurs, horctakeover returns the value EX_EWSTOT. The
unit is seconds.
In asynchronous mode, when there is an CA link
failure, both the PVOL and SVOL sides change to a
PSUE state. However, on the SVOL side, this change
will not take place until the CA link timeout value,
configured in the Service Processor (SVP), has been
reached. If the horctakeover command is issued during
this timeout period, the horctakeover command could
fail if its timeout value is less than that of the CA link
timeout. Therefore, it is important to set the
HORCTIMEOUT variable to a value greater than the CA
link timeout value. The default CA link timeout value
is 5 minutes (300 seconds). A suggested value for
HORCTIMEOUT is 360 seconds.
During package startup, the default startup timeout
value of the package is set to NO_TIMEOUT in the
package ASCII file. However, if there is a need to set a
startup timeout value, then the package startup
timeout value must be greater than the HORCTIMEOUT
value, which is greater than the CA link timeout value: