On 07/23/10 06:44 AM, Bart Smaalders wrote:
On 07/21/10 15:25, Ian Collins wrote:
If Solaris Next is to be IPS based, I really really hope we will see a
viable upgrade path. The lack of one is the biggest hurdle to IPS
adoption.
In general, upgrading from UFS root w/ svr4 packages to ZFS root w/
IPS is a very difficult problem. While we can imagine cases in which we
could be successful, there are a host of situations which are not
readily addressable. Add to this the fact that most of Sun
^H^H^HOracle's Solaris customers generally do NOT upgrade from one
release to the next, because of the reproducibility problem - production
machine configurations need to be readily reproducible, and upgrading
an existing S10 patched OS is not the best way of doing this.
I can see that's probably true. I only ever upgraded one production box
from Solaris 9 to 10 and that was a very simple configuration.
Nearly all of the other production Solaris 9 boxes I've replaced have
been migration for their services to Solaris 10 zones. The small
remainder have been imported to branded zones. So I guess Robert is
right, a branded zone is one option!
I do wonder how much of a selling point (to keep people on Solaris) the
ability to upgrade was, even it wasn't used?
We anticipate developing and sharing migration strategies and tools,
but a traditional upgrade in place DVD approach is not likely to occur.
That's good.
The traditional upgrade in place DVD approach has probably reached the
end of the line with the increasing use of virtualisation. Treating a
system (or zone) as a service and looking at how to migrate that is
better approach.
--
Ian.
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