HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, December 2009)

Fabric OS 6.1.1 administrator guide 55
High Availability of daemon processes
Fabric OS 6.x supports automatic restart of non-critical daemons. Starting these non-critical daemons is
automatic, you cannot configure the startup process. The following sequence of events occurs when a
non-critical daemon fails:
1. When a non-critical daemon fails or dies, a RASLog and AUDIT event message is logged.
2. The daemon is automatically started again.
3. If the restart is successful, another message is sent to RASLog and AUDIT reporting the successful restart
status.
4. If the restart fails, another message is sent to RASLog and no further attempts are made to restart the
daemon.
Schedule downtime and reboot the switch at your convenience. Table 6 lists the daemons that are
considered non-critical and are automatically restarted on failure.
Table 6 Daemons that are automatically restarted
Daemon Description
Arrd Asynchronous Response Router (used to send management data to hosts when the switch is accessed
through the APIs (FA API or SMI-S).
Cald Common Access Layer Daemon (used by Manageability Applications).
Evmd Event Monitor Daemon (used by port and switch SCNs, firmwareDownload, and configDownload)
Raslogd Remote Access Service Log Daemon logs error detection, reporting, handling, and presentation of
data into a format readable by management tools and the user.
Rpcd Remote Procedure Call daemon used by the API (Fabric Access API and SMI-S).
Snmpd Simple Network Management Protocol Daemon.
Traced Trace Daemon. Provides trace entry date/time translation to Trace Device at startup and when
date/time changed by command. Maintains the trace dump trigger parameters in a Trace Device.
Performs the trace Background Dump, trace automatic FTP, and FTP “aliveness check” if auto-FTP is
enabled.
Trackd Track Changes Daemon.
Webd Webserver daemon used for Web Tools (includes httpd as well).