Ray,
I realize that the kernel stuff will be somewhat different. The 6.0 box
(let call is OLD) can be down for a reasonable amount of time. I'm at a
small college and its NOT that critical after 10pm at night. My idea was
to back up the old box, and wipe it clean... and do a minimal 6.2 install
on it. Build a kernel with my raid card, and NICs and any other kernel
dependent stuff. That way I can set partition sizes and all that in the
initial install. Then this is where I'm kind of at a halt. Is NFS the
answer... or is something else a better idea... I'm not as concerned about
the iPs and the hostnames... I feel like I can knock most of those out in
few hours... or would tar'n things be easier... ftp them over and
uncompress them. I guess it could be more selective that way. I'm just
looking for suggestion and pitfalls... and you have given me a few
already... thanks.. any other ideas
Mike
At 08:05 AM 5/31/2000 -0700, Ray Olszewski wrote:
>The exercise you pose is trickier than it might seem at first glance, and I
>don't know of any "standard" procedure for it. Partly this is because it
>depends on how similar the two systems are.
>
>Clearly they are not identical; if they were, you would be taking the
>obvious solution of turning off power to the old server, swapping in the new
>one, and turning the power back on.
>
>So the first thing you need to consider is how different the two are. You
>mention that the 6.0 box has RAID capability; by implication the 6.2 box
>doesn't. RAID, as I recall, requires special kernel compilation options;
>will the kernel on the 6.2 box run, unmodified, on the 6.0 box? RAID is the
>obvious example, but filesystem arrangement and NICs are other potential
>differences. You said its differences include "and the such", whatever that
>might refer to, so I do assume there is more than just RAID to worry about.
>
>How much of the rest of the configuration will transfer unmodified?
>Presumably the hosts have different IP addresses, requiring a bit of
>customizing. Do they use the same X server? The same /etc/printcap entries?
>And so on ....
>
>I'm not really asking you to tell us all the answers here, just trying to
>illustrate the range of details you need to think about when trying to
>transfer a configuration from one host to another. THis should give you a
>fell for why there is no off-the-shelf answer to your question.
>
>Assuming the configurations of the kernel and a large assortment of
>ancillary packages matches, the next question is whether you can interrupt
>service tor 30 minuts or so. If not -- if the system needs to run 24/7 --
>the sort of upgrade you want to do probably is impossible, and you'll need
>to "hot swap" the new host for the old one (interrupting service for a
>minute or so; I don't know a way around that), rebuild the old server, and
>then hot swap again. The details depend on what *content* the old server is
>serving up; it needs to be mirrored to the new server for you to do this.
>
>How to do the actual transfer? The easiest way I've found is to boot up the
>target machine from a suitable floppy-based Linux (tomsrtbt is a good choice
>for this), transfer the new system in any of several ways (NFS mount + cp; a
>"tar" pipe; by tape if both hosts have tape drives [apparently not in your
>case]; etc.), run LILO, and reboot/init with the new kernel and other
>upgrades.
>
>Even here, you need to make sure you only overwrite the portions of the
>filesystem(s) that you want upgraded. If you used a standard RH
>disk-partitioning scheme, with a bunch of (mostly) small filesystems, this
>will be easy -- the stuff you want to preserve on the old system, its
>contents, will be separate from its execuatables. If you are using fewer,
>larger partition, you need to be careful not to overwrite anything you want
>to keep. A selective tape backup and restore might help you here.
>
>At 08:25 AM 5/31/00 -0500, Mike Tvarkunas wrote:
> >Hi Group,
> >
> >Does anyone have a quick idea, or a link to a good site about migrating to
> >a new box. What I have is a production 6.0 box, and a Pre-Production 6.2
> >box. The 6.2 is ready for the real world now, and I want to move it to the
> >current box running 6.0. (It has a raid capabilities and the such)
> >
> >My question is what is the best way to go about this.... IS there a best
> >way? The 6.0 box does have a tape drive, but the new one doesn't. Can you
> >do any type of NFS backup or something from the 6.0 of the 6.2 and then
> >restore to the box?
>
>------------------------------------"Never tell me the odds!"---
>Ray Olszewski -- Han Solo
>Palo Alto, CA [EMAIL PROTECTED]
>----------------------------------------------------------------
>
>
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