[pca] Install in Single User Mode?

[Romeo Theriault]

I'm new to pca usage. I've been updating our Solaris machines with  
Sun's Recommended Patch Clusters but I'd like to use pca but have a  
few unanswered questions about pca usage.

First, Sun "strongly" recommends that the patch clusters be installed  
in single-user mode. Is it recommended to install the patches with pca  
in single-user mode? At least the ones that require a reboot to  
finish? Or is it safe to install them in multi-user mode but with just  
all the applications using the system turned off?

Is using pca to install all of the recommended and security patches  
(pca -i missingrs) equivalent to installing a patch cluster?

Is installing the patches with pca any faster than installing the  
patches with the patch cluster? The last patch cluster I installed  
took about 3 hours. ouch!

Thanks for any comments/suggestions.

Romeo