Douglas McClendon wrote:
Elias Hunt wrote:
Douglas,
Assuming that iso-caching-to-disk feature is implemented, would it be
easy to have the caching occur on an ext3 partition?
Note, it is even trivial to have an option of whether you want to migrate the
compressed squashfs base, or the uncompressed ext3fs base. With the former, you
would still suffer from decompression during normal use, but the latter would
take much more disk space.
Live migration of the root fs is just so cool. Almost makes me want to create a
fedora derivative where the root fs is _always_ an extra dm linear device layer,
so that at any point in the future, you can live migrate the root filesystem.
Use-case: You have a hard disk failing in a truly mission critical system.
Now, you can live-migrate the root-fs to an external USB-drive, and then reboot
to remove the physically failed drive at your leisure.
Have I mentioned that I am a recent BS-CoE grad from KU actively seeking
employment- http://douglas.mcclendon.org/resume
(may the mailinglist protocol lords forgive me, yet again ;)
-dmc
Yup Yup Yup :) My 2001 project would scan for all partitions it could
blindly mount (mount -t auto), and use any that it found available with
at least 2X the free space needed.
I'll take your use-case as added motivation to work on a proof of
concept implementation of that feature... So much code to write... so
little time ;)
-dmc
My company actually has a use case where we create custom livecds for
hundreds of systems, using a local drive for data storage only as we
don't want the OS to be modified permanently (a reboot will restore to
normal). Having the performance gain of actually running the iso from
the local disk, while still being able to mount the disk for data
storage, and being able to insert other CDs to the running system would
provide huge benefits.
-Eli
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Douglas
McClendon
Sent: Sunday, July 08, 2007 5:23 PM
To: [email protected]
Subject: Re: [Fedora-livecd-list] [RFC/PATCH] livecd rebootless
installer
Douglas McClendon wrote:
Jeroen van Meeuwen wrote:
Douglas McClendon wrote:
I'm sure there's /a/ use-case for this technical advancement. Besides
that, I'm all for any technical advancement -whether it has actual
use-cases or not.
/The/ use case is simple. It does what it does. It is what it is.
Whether or not it is well received once it is an available option,
remains to be seen. Note, that it is trivial to enhance the existing
patch such that things only happen differently than normal if you pass
'support_rebootless' on the kernel commandline.
Also note that it is fairly trivial to add an option so that the user
can chose whether to live-migrate the cdrom+ram_overlay onto the
destination volume, or just the cdrom. In the latter case, the user
could still eject the cdrom when installation is complete and continue
working in the live system, though on reboot it would forget all the
live-session modifications and give you a fresh start.
A different continuation of this thought, is the modification to support
the iso-caching-to-disk functionality I described in my 2001 project.
Though now, instead of vfat, use ntfs-3g.
I.e. do your live migration to a file on an ntfs partition, such that
after the migration
a) the user can eject the cdrom and use the cdrom drive for other
reasons
b) the system will be much more responsive as data is pulled from the
ntfs rather than the cdrom
c) with a sufficiently modern (i.e. probably doesn't exist yet) version
of grub or loadlin, the live environment could be subsequently booted
strait
from ntfs, without needing the original livecd.
-dmc/jdog
--
Fedora-livecd-list mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/fedora-livecd-list
--
Fedora-livecd-list mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/fedora-livecd-list
--
Fedora-livecd-list mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/fedora-livecd-list
--
Fedora-livecd-list mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/fedora-livecd-list
