Re: RAC platform usage

we had 1 incident of mysterious hang on a 2-node RAC on linux x86-64. We had another interesting incident on a 5-node RAC on linux x86-64, at one scheduled maintenance, 3 of the 5 nodes wouldn't reboot. we tried "reboot", "shutdown -h now", "init 6", etc, it showed that "I am rebooting (something like that, don't remember exact word)" but it actually didn't reboot. We had to power recycle them.

All of these servers are Dell PE 2950, wonder if anybody had the same experience? :)

On Sat, May 3, 2008 at 5:36 PM, Dan Norris <dannorris_at_dannorris.com> wrote:
>
> I'm not sure that's really fair. There are lots of happy customers on
> Itanium (many of them aren't using Oracle) and I've heard of similar
> symptoms (mysterious hangs and the like) on Linux x86, Linux x86-64,
> Windows, and Solaris.
>
> I still agree that I wouldn't choose Linux Itanium for my mission-critical
> RAC deployment right now, but I don't think I'd blacklist it forever either.
>
> Dan
>
> Yong Huang wrote:
>
>
> My understanding is that
> Itanium is a platform with a pretty poor takeup.
> Niall
>
>
>
>
> Not only do I agree, but I think that's an under-statement. For historical
> reason, our group inherited a 4-node Linux RAC on Itanium. This critical
> database experienced numerous mysterious hangs in the past few months (and
> possibly more before I joined). There's no trace or log in Oracle, on OS, on
> storage, on server consoles. When they hang, ping works but nothing else.
> Console is blank and not responding. The only way to bring them back is a
> human
> pushing the power button. I posted questions to Linux newsgroups, asked our
> SAs, suggested a theory of CPU temperature spike. No progress is made.
> Fortunately, apps on these expensive boxes are slowly migrated off.
>
> For articles I found about Itanium failures, see my list:
> http://yong321.freeshell.org/oranotes/ItaniumProblem.txt
>
> Yong Huang
>
>
>
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