| |
|
 |
|
 |
|
|
|
| |
|
|
xen-api
Re: [Xen-API] Constructors and Destructors on classes
On Tue, Mar 06, 2007 at 08:06:58PM +0530, Hetal Badheka wrote:
> Hello,
>
> Does a constructor on class VM just create an instance of the class in
> Xen's memory or does it actually provision a new VM and conversely, what
> does a destructor do, delete the VM class instance from memory or
> destroy a virtual machine?
Think of it like a database record. VM.create creates a record, and
VM.destroy deletes that record again. (Xend doesn't actually use a
DBMS, but that's the mental model you need). A running domain is
created and destroyed using VM.start, VM.clean_shutdown, and so on.
VM.create does not imply that a domain is created to match -- you are
merely creating the record corresponding to a non-running VM.
> The class "host" and "host_cpu" also have create and destroy methods on
> them and since you can't create and destroy a physical host or a
> physical cpu, I am guessing that the answer to my question above for VMs
> is that the create and destroy methods just instantiate and destroy a
> class instance and do not actually cause the provisioning and
> decommissioning of a virtual machine.
These methods should never have been added, and will be removed
immediately if they're still there. A host and some host_cpu records
are created implicitly by Xend at startup.
HTH,
Ewan.
_______________________________________________
xen-api mailing list
xen-api@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-api
|
|
|
| |
|
Home