vxesd - Veritas Dynamic Multi-Pathing (DMP) event source daemon
The event source daemon (vxesd) registers with various sources
of device-related events on the system. When
vxesd receives notification of these events, it takes the appropriate
actions. The vxesd also obtains information about the
Fibre Channel and iSCSI SAN configuration for DMP.
The vxesd registers to the following event sources:
By default, VxVM starts vxesd at boot time. To stop
the vxesd daemon, use the vxddladm utility:
Fabric events from Fibre Channel SAN
vxesd uses the SNIA HBA API library to obtain information
about the Fibre Channel SAN and to register for event notifications from
SAN that reach the HBA. On receiving a SAN disruption notification,
vxesd notifies DMP about a likely failure in the affected
part of the SAN.
Use the dmp_monitor_fabric tunable parameter to turn on or
off the vxesd functionality to monitor fabric events.
Events from the DMP driver.
vxesd also registers for notifications from the DMP
driver. On receiving these notifications, it logs these
events with the exact time stamps in a circular log file. The
log files are located at /var/adm/vx/dmpevents.log.*
vxddladm stop eventsource
To start the vxesd daemon, use the vxddladm utility:
vxddladm start eventsource [logfile=logfilename]
The vxesd daemon is started with the current values of
dmp_monitor_fabric and dmp_monitor_osevent tunables. When these
tunables are changed, the vxesd daemon is restarted
with the changed values.
Veritas Dynamic Multi-Pathing Administrators Guide