Netexpertise

Disabling Image Files

Xen usually stores running domains in /var/lib/xen/save, causing a /var full on many systems when dom0 is shut down. Edit /etc/sysconfig/xendomains or /etc/default/xendomains and replace
"XENDOMAINS_SAVE=/var/lib/xen/save"
with
"XENDOMAINS_SAVE="
This sends a shutdown signal to all virtual machines before dom0 reboots. A 300 second timeout is defined before killing an OS that hangs on shutdown.
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Tags: console, keyboard, linux, NTP, redhat, routes, static, virtual, Xen

Since version 2, Heartbeat is able to manage more than 2 nodes, and doesn’t need "mon" utility to monitor services.
This fonctionnality is now implemented within Heartbeat.
As a consequence, this flexibility and new features may make it harder to configure.
It’s intresting to know version 1 configuration files are still supported.
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Tags: cluster, failover, heartbeat, high availibility, linux, redundancy, virtual