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Top Forums Shell Programming and Scripting dilemma what to use c++ or script for demon process Post 302285456 by ddreggors on Monday 9th of February 2009 02:41:07 AM
Old 02-09-2009
That really depends on the commands you are running, and how well the app/script is written. Shell scripts and c++ apps (if written well) are fast and have a small foot print.

That said, if no attention is paid to what is being done with the app/script... things can get nasty quick.

Just watch for things that cause heavy I/O (searching the whole drive or worse nfs drive for text in a file), and also watch for things that will consume all memory or cpu.

Obviously test all scripts/apps on a test machine prior to running anywhere near production servers.

Watch the I/O, CPU, and Mem when you test.
 

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keepalived(8)						      System Manager's Manual						     keepalived(8)

NAME
keepalived. - keepalive demon SYNOPSIS
/usr/sbin/keepalived [-n] [-f keepalived.conf] [-d] [-h] [-v] DESCRIPTION
The keepalived The keepalived server implements the vrrpd routing demon which enables routing failover for a pair (or set) of routers (or LVS directors) and the keepalived demon which sets up and does the health checking of virtual services in a Linux Virtual Servier. OPTIONS
--vrrp, -P Only run the VRRP subsystem. --check, -C Only run the healthchecker subsystem. --dont-release-vrrp, -V leave (don't remove) VRRP VIPs & VROUTEs on daemon stop. --dont-release-ipvs, -I Dont remove IPVS topology on daemon stop. --dont-fork, -n Dont fork the daemon process. --use-file, -f keepalived.conf_file Use the specified configuration file. --wdog-vrrp, -R Define VRRP watchdog polling delay (default=5s) --wdog-check, -H Define healthchecker's watchdog polling delay (default=5s) --dump-conf, -d Dump the configuration data. --log-console, -l Log messages to local console. --log-detail, -D Detailed log messages (the default with the rc script provided). --log-facility, -S 0-7 Set syslog facility to LOG_LOCAL[0-7] (default=LOG_DAEMON) --help, -h Display a short inlined help screen. --version, -v Display the version number. FILES
/etc/keepalived/keepalived.conf SEE ALSO
keepalived.conf(5) AUTHORS
Joseph Mack from inspection of the output of keepalived --help from keepalived-1.1.4 Jan 2004 keepalived(8)
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