topic Re: vpar isolation in Operating System - HP-UX

vpar isolation

Tim Rolling — Wed, 03 Apr 2002 16:05:42 GMT

Does anyone know whether vpar partitions are completely isolated from each other? Will a crash in one partition affect another partition, or even the whole system?

Re: vpar isolation

melvyn burnard — Wed, 03 Apr 2002 16:15:19 GMT

If one partition crashes due ot an OS issue, or a piece of hardware that is solely in that partition, there should be no effect on other partitions.
There are, however, a few things that would affect (usually) all partitions, not least are any single points of hardware failure, such as the input PSU (if you do not have an additional one such as on the SuperDome).
Various PDC/Firmware issues may also affect multiple partitions.

Re: vpar isolation

Sandip Ghosh — Wed, 03 Apr 2002 16:20:53 GMT

Additon to the points mentioned by Melvyn, you will be affected if you are having the crash due to the faliure of the system board and the cpu monitor card because this resource is shared by all the Vpars.

Sandip

Re: vpar isolation

harry d brown jr — Wed, 03 Apr 2002 16:27:50 GMT

Tim,

A hardware issue or a virtual monitor issue will cause all vpar's to go belly up, but if a single OS crashes, just reboot it using vparboot. I have an nclass with 6 partitions (could make it 7) and it has been running non-stop for 160+ days (I had to power it down 160+ days ago to move it to another UPS). I also have installed stuff and rebooted individual partitions without affecting the rest.

live free or die
harry

Re: vpar isolation

Tim Rolling — Wed, 03 Apr 2002 16:32:03 GMT

If an OS panics inside a software partition, will it issue a hard reset and reboot the whole system?

Similarly, does ServiceGuard issue a hard reset at TOC and reboot the whole system?

Re: vpar isolation

melvyn burnard — Wed, 03 Apr 2002 16:33:26 GMT

A ServiceGuard TOC only affects the partition, not the whole system

Re: vpar isolation

harry d brown jr — Wed, 03 Apr 2002 16:34:32 GMT

Tim,

I don't think either will do a TOC, but then again, I haven't had that happen.

live free or die
harry

Re: vpar isolation

Tim Rolling — Wed, 03 Apr 2002 16:46:39 GMT

Thanks to everyone for a great response. I really appreciate and value this forum.