You can use live migration in such setup, even safely if
you back it by
clvm. You can even live without clvm if you deactivate
your VG on all
but a single dom0 before changing the LVM metadata in any
way. A
non-clustered VG being active on multiple dom0s isn't a problem
in
itself and makes live migration possible, but you'd better
understand
what you're doing.
> Can you please explain to me how my plan is ambitious? Can
someone
> please suggest where I should cut down/ scale up?
Even
100 domUs on a single dom0 is quite a lot. 100 Mbit/s
upstream
bandwidth isn't much. You'll have to tune your iSCSI carefully
to
achieve reasonable I/O speeds, which is limited by your total
storage
speed. Even if your domUs don't do much I/O, 128 MB of memory
is pretty
much a minimum for each, 128 of those require 16 GB of dom0 memory
(this
is probably the easiest requirement to
accomodate).
------------------------------------------------------------------------------------------------
Can you please explain the steps I would need to take in order to
connect multipl clients to a single iSCSI target? I was thinking of using LVM on
the storage server to split my RAID array in 2 big LVs, and then export one LV
to a node. Then the xen node would use LVM within this exported LV. to split it
up into small LVs for the DomUs. Is this a good or bad idea?
The 100 Mbit/s upstream is for the internet connection. The
bandwidth to the iSCSI server is dual bonded gigabit ethernet. What tuning could
i do to the iSCSI setup?
Thanks