Dave Bevans wrote: > Hi, > > I have a customer with the following questions... > > > I have LDOMs configured and running on this Sun T5120 server with > following details: > > * LDOM Control domain is running on Solaris 10 update 4 > > * Guest domains (4) are also running on Solaris 10 update 4 > > Now, I want to upgrade the control domain to Solaris 10 update 5. The > questions are as below: > > * Is it possible to run the Guest domains on older releases than > control domain (for example, Guest running update 4 while control domain > on update 5) >
Yes, that is supported. Note, those are very old releases - beware of the following bug in particular if you plan to net-install more domains with S10U4 after you upgrade the control domain: 6705823 guest ldom hangs during boot net of s10u4. The bug doesn't exist in newer releases. > * What is the best way to upgrade Control domain ? Using CD/DVD > media or using Liveupgrade? > Personally, I'd suggest Live Upgrade (they could also just apply patches to update the OS on the control domain) > * Is it suggested to schedule downtime on Guest domains while > upgrading control domain? If they have configured an alternate service domain, there should be no impact on services to the guest domains. If not, the I/O on the guest domains will be paused while the control domain is rebooting. Unless it's an extended outage on the control domain, they should be fine but it really depends on the usage of the guest domains and how critical the services they provide are. - Liam
