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JumpBox for phpBB 1.0.1 (Default branch)
05-01-2008
phpBB is a popular discussion forum system. The JumpBox for phpBB allows anyone to be up and running with this system in under a minute on any OS. Its self-contained nature makes it perfect for offline development, and the backup/restore feature simplifies the process of upgrading to newer versions.|
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WD_KEEPALIVE(8) System Manager's Manual WD_KEEPALIVE(8) NAME
wd_keepalive - a simplified software watchdog daemon SYNOPSIS
wd_keepalive [-c filename|--config-file filename] DESCRIPTION
This is a simplified version of the watchdog daemon. If configured so it only opens .IR /dev/watchdog , and keeps writing to it often enough to keep the kernel from resetting, at least once per minute. Each write delays the reboot time another minute. After a minute of inactivity the watchdog hardware will cause a reset. In the case of the software watchdog the ability to reboot will depend on the state of the machines and interrupts. The wd_keepalive daemon can be stopped without causing a reboot if the device /dev/watchdog is closed correctly, unless your kernel is com- piled with the CONFIG_WATCHDOG_NOWAYOUT option enabled. Under high system load wd_keepalive might be swapped out of memory and may fail to make it back in in time. Under these circumstances the Linux kernel will reset the machine. To make sure you won't get unnecessary reboots make sure you have the variable realtime set to yes in the configuration file watchdog.conf. This adds real time support to wd_keepalive: it will lock itself into memory and there should be no problem even under the highest of loads. On system running out of memory the kernel will try to free enough memory by killing process. The wd_keepalive daemon itself is exempted from this so-called out-of-memory killer. OPTIONS
Available command line options are the following: -c config-file, --config-file config-file Use config-file as the configuration file instead of the default /etc/watchdog.conf. FILES
/dev/watchdog The watchdog device. /var/run/wd_keepalive.pid The pid file of the running wd_keepalive. SEE ALSO
watchdog.conf(5) watchdog(8) 4th Berkeley Distribution January 2005 WD_KEEPALIVE(8)