On Sat, 26 May 2001, Jeff Garzik wrote:
> Cesar Da Silva wrote:
> > The features that I'm wondering about are:
> > * Dynamic Processor Resilience
>
> is this fault tolerance? I think if a CPU croaks, you are dead.
>
> There are patches for hot swap cpu support, but I haven't seen any CPU
> fault tolerance patches that can handle a dead processor
The S/390 has this; presumably it applies to Linux as well as the other
supported OSs?
> > * Dynamic Memory Resilience
>
> RAM fault tolerance? There was a patch a long time ago which detected
> bad ram, and would mark those memory clusters as unuseable at boot.
> However that is clearly not dynamic.
>
> If your memory croaks, your kernel will experience random corruptions
ECC can be supported by the hardware; no support for mapping out duff
banks on x86, but again S/390 may differ?
> > * Live Upgrade
>
> LOBOS will let one Linux kernel boot another, but that requires a boot
> step, so it is not a live upgrade. so, no, afaik
Live SOFTWARE upgrade, or live HARDWARE upgrade? If the latter, things
like hotswap PCI, USB... and again the S/390?
> > * Service Location Protocol (SLP)
>
> don't know
Yes, I think so - mars_nwe surely needs this?
> > * TCP/IP Gratuitous ARP (RFC 2002)
>
> not sure
Isn't that how LVS clusters handle IP takeovers?
> > * Path MTU Discovery (RFC 1191)
>
> yes
With one or two RFC violations, yes.
Basically, most of those features relating to hardware resilience should
be usable with Linux on an S/390 - they are hardware features, though,
AFAICS?
James.
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This archive was generated by hypermail 2b29 : Thu May 31 2001 - 21:00:32 EST