[one-users] one-1.2.0 support for LVM over iSCSI

Ruben S. Montero rubensm at dacya.ucm.es
Sun Jul 26 16:42:11 PDT 2009


What a timely contribution!!!. I've uploaded the diff and pointers for
this issue to the dev page:


We can easily merge your patches for this, I really like the approach
and it can be used in the other hypervisors. Maybe we can simplify it
a little bit if we use a new type, as:

DISK = [ type ="lvm" ,...

Although this has been initially marked  for 1.4.2, as the 1.4 beta
has been just released, we also agree that LVM is a very useful
feature and a long awaited one. So, we will aim for 1.4.0 if nothing
serious shows up...

THANKS again for your feedback and contribution!!!


On Sat, Jul 25, 2009 at 12:14 PM, Sander Klous<sander at nikhef.nl> wrote:
> Hi,
> I made some minimalistic changes to XenDriver.cc and TransferManager.cc to
> support LVM over iSCSI. Details of what I did can be found under
> "Implementation issues" on this page:
> http://www.nikhef.nl/pub/projects/grid/gridwiki/index.php/Virtual_Machines_working_group
> Basically the code checks for the first 5 characters of a path. If these
> characters match "/dev/" then it is assumed to be a block device and handled
> as "LVM over iSCSI". The changes should be backward compatible.
> I attached the diffs for both src files. The tm scripts and configuration
> changes are available at the above mentioned web page.
> The big advantage of using LVM over iSCSI is the possibility to work on
> locally stored copy-on-write clones from the LVM images. If this can be
> combined with a significant iSCSI read-cache (still need to investigate
> this), it would significantly reduce the overhead of image transfers between
> the image repository and the nodes.
> Please feel free to contact me for comments or more information.
> Thanks,
> Sander
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> Users at lists.opennebula.org
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 Dr. Ruben Santiago Montero
 Associate Professor
 Distributed System Architecture Group (http://dsa-research.org)

 URL:    http://dsa-research.org/doku.php?id=people:ruben
 Weblog: http://blog.dsa-research.org/?author=7

 GridWay, http://www.gridway.org
 OpenNebula, http://www.opennebula.org

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