[Users] ISCSI Luns

[Juan Pablo Lorier]

Hi,

I've been using ovirt in production for a couple of months and had no
troubles ( great product! :-) ).
I've two issues I'd like to fix and may also be usefull for a new
feature in 3.4:

The first is that I had to put # RHEV PRIVATE in the multipath.conf of
every host as ovirt kept deleting the device and alias definitions and
thus, multipath was not able to get the luns. I'd like to know if
there's a file in engine where I can set the default config for
multipath so I don't have to change every host's multipath.conf
everytime I decide to add a new alias, etc.

The second is the use of the iscsi domain. I have now all my vms in
separate luns (one for each one) in the netapp san, so I use direct lun
for the vm disks. But I have a second iscsi san from IBM that is the
data domain of the DC. I'd like to have all my vms with storage
redundancy by adding both sans as primary and backup but if I try to add
the netapp to the storage domain, it can't just import the luns as it
writes data to the lun and this would corrupt the lun's filesystems.
How can I use both sans without loosing all my vms?

Last I'd like to get some recomendations on performance: is it better to
have separate luns for each vms than having one lun with different
virtual disks?
Regards,