[EMAIL PROTECTED] wrote:
> This is kinda what tmpfs could offer if it was possible to have
> pre-load it.
> 
> However, this sounds very much like an ordinary filesystem: you load in
> RAM what you need and nothing more.

i'd like to be able to load it like a ramdisk. in linux (sorry, it's
what i know). i simply specify a cpio archive instead of a ramdisk and
it will overlay it on tmpfs. if i feel it necessary i can limit it's
size or by default it can grow to 1/2 of physical ram.

> Or perhaps you want ramfs backed by swap?

not really, that's why i had the next question ;-)

>> okay, i was not aware of that (hence the disclaimer about naivety to
>> begin with ;-) if you have a pointer about how to configure this I'd
>> appreciate it. I assume if you run out of physical ram solaris will just
>> hang?
> 
> Just don't configure any swap.  It isn't supposed to hang but failure
> modes in RAM shortage are many and complicated: processes may die;
> processes cannot be created; some things will start failing, others will
> wait in the hope the memory situation get better.

okay, we've just seen some strange problems without swap. i haven't had
time to look into why, so we are just going to use swap anyway for now.

>> Okay, that's good. Do you have the support for x86 too? I was thinking
>> more about support on top of Xen. With Xen you are able to migrate
>> sessions across computers and with hotplug cpus you can migrate to
>> different number of cpus. I'd like to be able migrate a session of my
>> server to my laptop whilst i do some hardware tinkering, then migrate it
>> back. No interruption to service everythings fine.
> 
> That's something entirely different which cannot be done without involving
> a hypervisor of sorts.

well, first you have to have xen support, but the hotplug cpu events
should be treated the same. Although i'm probably glossing over a
tremendous amount of technical detail ;-)

> prtdiag is available on newer revisions of Solaris.

I'll try to get a new nevada system running soon. If only i could figure
out bfu...

peter
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