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List: tarsnap-users
Subject: Re: Migrating a VM
From: Dimitris Maroulidis <dmaroulidis () dimitrismaroulidis ! com>
Date: 2017-10-03 20:06:01
Message-ID: CAONzNzEdn2y0OBcRqgeyPaVXeicBRVYRpuUeLx4zr1Gz51nibA () mail ! gmail ! com
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Thanks for the answer! These are some pretty solid arguments.
Στις Τρί, 3 Οκτ 2017, 19:56 ο χρήστης Colin Percival <cperciva@tarsnap.com>
έγραψε:
> On 10/03/17 07:28, Dimitris Maroulidis wrote:
> > I have a an ubuntu xenial vm on AWS which I want to migrate to Google
> > Cloud, and its root filesystem is backed up daily to tarsnap. How would
> > I go about doing that?
>
> Easiest solution is to launch a new VM in GCP and rsync your files across
> into a subdirectory; then move things into the appropriate places. Trying
> to do a "bare metal" sync runs into two problems:
>
> 1. You need to have "a place to stand" (aka. a running system) before you
> can do anything, so you can't copy onto an "empty disk" unless you play
> crazy games with booting into memory disks.
>
> 2. There are usually subtle differences between how things work in
> different
> clouds, which will have been taken care of in the base OS images for the
> platform; you don't want to overwrite those.
>
> I suggest rsync rather than tarsnap simply because there's no need to
> restore
> from a backup if you have the original system still running; rsync will
> probably be faster. But you could extract an archive from tarsnap instead
> if
> you prefer.
>
> --
> Colin Percival
> Security Officer Emeritus, FreeBSD | The power to serve
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
>
--
Dimitris Maroulidis <https://www.dimitrismaroulidis.com>
President at Wyse Creative <https://www.wysecr.com>
PGP Key Fingerprint: 0x9A3AF9E170FC870FA3406D0A507892A78ADEC769
[Attachment #3 (text/html)]
<p dir="ltr">Thanks for the answer! These are some pretty solid arguments.</p>
<br><div class="gmail_quote"><div dir="ltr">Στις Τρί, 3 Οκτ 2017, 19:56 ο \
χρήστης Colin Percival <<a \
href="mailto:cperciva@tarsnap.com">cperciva@tarsnap.com</a>> \
έγραψε:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 \
.8ex;border-left:1px #ccc solid;padding-left:1ex">On 10/03/17 07:28, Dimitris \
Maroulidis wrote:<br> > I have a an ubuntu xenial vm on AWS which I want to \
migrate to Google<br> > Cloud, and its root filesystem is backed up daily to \
tarsnap. How would<br> > I go about doing that?<br>
<br>
Easiest solution is to launch a new VM in GCP and rsync your files across<br>
into a subdirectory; then move things into the appropriate places. Trying<br>
to do a "bare metal" sync runs into two problems:<br>
<br>
1. You need to have "a place to stand" (aka. a running system) before \
you<br> can do anything, so you can't copy onto an "empty disk" unless \
you play<br> crazy games with booting into memory disks.<br>
<br>
2. There are usually subtle differences between how things work in different<br>
clouds, which will have been taken care of in the base OS images for the<br>
platform; you don't want to overwrite those.<br>
<br>
I suggest rsync rather than tarsnap simply because there's no need to restore<br>
from a backup if you have the original system still running; rsync will<br>
probably be faster. But you could extract an archive from tarsnap instead if<br>
you prefer.<br>
<br>
--<br>
Colin Percival<br>
Security Officer Emeritus, FreeBSD | The power to serve<br>
Founder, Tarsnap | <a href="http://www.tarsnap.com" rel="noreferrer" \
target="_blank">www.tarsnap.com</a> | Online backups for the truly paranoid<br> \
</blockquote></div><div dir="ltr">-- <br></div><div class="gmail_signature" \
data-smartmail="gmail_signature"><div dir="ltr"><p dir="ltr">Dimitris Maroulidis \
<<a href="https://www.dimitrismaroulidis.com">https://www.dimitrismaroulidis.com</a>><br>
President at Wyse Creative <<a \
href="https://www.wysecr.com">https://www.wysecr.com</a>></p> <p dir="ltr">PGP Key \
Fingerprint: 0x9A3AF9E170FC870FA3406D0A507892A78ADEC769<br></p> </div></div>
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