Messages in this thread |  | | Date | Sun, 27 May 2001 09:17:15 +0100 (BST) | From | James Sutherland <> | Subject | Re: Please help me fill in the blanks. |
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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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