In order to force all DomUs to shutdown, instead of suspending, during Domain 0’s shutdown, all you have to do is make following changes in /etc/sysconfig/xendomains: Leave empty the XENDOMAINS_SAVE variable. By default, it uses /var/lib/xen/save as the directory where the states of the DomUs are saved. By leaving it empty, the states of the virtual machines are not saved, but they are shut down as usual. Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fwww.g-loaded.eu%2F2009%2F02%2F01%2Fxen-domu-using-dynamic-ip-and-hostname
It is currently common to build a number of releases from a single code base. For example, a development release, a QA release, a production release and perhaps customer-specific releases. However, these releases seem to differ mostly in the contents of their XML configuration files, and then only very little. Maintaining all these slightly different configuration files is a real nuisance.
XConf was created to simplify this maintenance. Its fundamental premise is that a single development-release (or production-release) configuration file is created and maintained, and is processed by XConf at either build or deployment time into an appropriate release by applying one or more XML-based scripts. Each script contains only the differences required to create the appropriate release, thus removing the need for the mass duplication of configuration files.
This is not really a new solution, since XSLT has been used in the past to do this quite successfully, but XPath can get a little arcane, and maintaining transformation scripts using XSLT can become really complex very quickly. XConf uses a very simple and compact method of specifying elements that need to be processed, and provides some very useful constructs to make transformations painless.
A Business Configuration Set is a set of Customizing settings Which are grouped according to logical, business management criteria to a unit. For documentary,
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