Dell Force10 E1200i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 393
Process Restartability
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Step 4 Task Command Syntax Command Mode View all In-Service patches on the system. show patch EXEC Patch version 7.8.0.1-EH-rp1-bgp-1.rtp Module Cpu Timestamp bgp RP1 Tue Mar 3 16:10:08 PST 2009 Note: The show patch command can be used on both the primary and secondary RPMs, as shown here: FTOS(standby)#show patch Patch version Module Cpu Timestamp E.1.1.bgp.1.0 bgp RP1 Mon Jun 22 06:51:23 PDT 2009 E.2.1.l2mgr.1.0 l2mgr RP2 Mon Jun 22 07:11:15 PDT 2009 FTOS(standby)# Process Restartability c e s Process Restartability is supported on platforms: Process Restartability is an extension to the FTOS High Availability system component that enables application processes and system protocol tasks to be restarted. This extension increases system reliability and uptime by first attempting to restart the crashed process on the primary RPM and then executing the failover procedure only as a last resort. Currently, if a software exception occurs, FTOS executes a failover procedure: • In a single-RPM system, the system generates a core dump and reboots. Reloads require the system to read and apply the entire startup-configuration file, which might take long if the startup-configuration is large. Restarting a process saves time because only a portion of the configuration related to the crashed process is read and re-applied. • In a dual-RPM system, the system generates a core dump and fails over to the standby RPM. Restarting a process precludes launching the failover process. Recovery is attempted first locally on the primary RPM, which involves less CPU overhead, increasing system availability for other activities. For both a single and dual-RPM system, when Process Restartability is enabled and a software exception occurs, FTOS: executes a core dump, frees system resources, restarts the failed process, and then updates the restart counter. By default, a process can be restarted a maximum of 3 times within 1 hour. If this limit is exceeded, the FTOS reloads the system reloads or fails over to the secondary RPM. High Availability | 393
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