Looking for information on best practices using Live Upgrade to patch LDOMs

This is in Solaris 10. Relatively new to the style of patching... I have a T5240 with 4 LDOMS. A control LDOM and three clients. I have some fundamental questions I'd like help with..
Namely:
#1. The Client LDOMS have zones running in them. Do I need to init 0 the zone or can I just +zoneadm zone halt+ them regardless of state? I.E. if it's running a database will halting the zone essentially snapshot it or will it attempt to shut it down. Is this even a nessessary step.
#2. What is the reccommended reboot order for the LDOMs? do I need to init 0 the client ldoms and the reboot the control ldom or can I leave the client LDOM's running and just reboot the control and then reboot the clients after the control comes up?
#3. Oracle. it's running in several of the zones on the client LDOM's what considerations need to be made for this?
I am sure other things will come up during the conversation but I have been looking for an hour on Oracle's site for this and the only thing I can find is old Sun Docs with broken links.
Thanks for any help you can provide,
pipelineadmin+*

Before you use live upgrade, or any other patching technique for Solaris, please be sure to read http://docs.oracle.com/cd/E23823_01/html/E23801/index.html which includes information on upgrading systems with non-global zones. Also, go to support.oracle.com and read Oracle Solaris Live Upgrade Information Center [ID 1364140.1]. These really are MANDATORY READING.
For the individual questions:
#1. During the actual maintenance you don't have to do anything to the zone - just operate it as normal. That's the purpose of the "live" in "live upgrade" - you're applying patches on a live, running system under normal operations. When you are finisihed with that process you can then reboot into the new "boot environment". This will become more clear after reading the above documents. Do as you normally would do before taking a planned outage: shut the databases down using the database commands for a graceful shutdown. A zone halt will abruptly stop the zone and is not a good idea for a database. Alternatively, if you can take application outages, you could (smoothly) shutdown the applications and then their domains, detach the zones (zoneadm detach) and then do a live upgrade. Some people like that because it makes things faster. After the live upgrade you would reboot and then zoneadm attach the zones again. The fact that the Solaris instance is running within a logical domain really is mostly besides the point with respect to this process.
As you can see, there are a LOT of options and choices here, so it's important to read the doc. I ***strongly*** recommend you practice on a test domain so you can get used to the procedure. That's one of the benefits of virtualization: you can easily set up test environments so you cn test out procedures. Do it! :-)
#2 First, note that you can update the domains individually at separate times, just as if they were separate physical machines. So, you could update the guest domains one week (all at once or one at a time), reboot them into the new Solaris 10 software level, and then a few weeks later (or whenever) update the control domain.
If you had set up your T5240 in a split-bus configuration with an alternate I/O domain providing virtual I/O for the guests, you would be able to upgrade the extra I/O domain and the control domain one at a time in a rolling upgrade - without ever having to reboot the guests. That's really powerful for providing continuous availability. Since you haven't done that, the answer is that at the point you reboot the control domain the guests will lose their I/O. They don't crash, and technically you could just have them continue until the control domain comes back up at which time the I/O devices reappear. For an important application like a database I wouldn't recommend that. Instead: shutdown the guests. then reboot the control domain, then bring the guest domains back up.
3. The fact that Oracle database is running in zones inside those domains really isn't an issue. You should study the zones administration guide to understand the operational aspects of running with zones, and make sure that the patches are compatible with the version of Oracle.
I STRONGLY recommend reading the documents mentioned at top, and setting up a test domain to practice on. It shouldn't be hard for you to find documentation. Go to www.oracle.com and hover your mouse over "Oracle Technology Network". You'll see a window with a menu of choices, one of which is "Documentation" - click on that. From there, click on System Software, and it takes you right to the links for Solaris 10 and 11.

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