[linux-lvm] LVM upgrade

[linux-lvm] LVM upgrade

[Fred Donck]

*,

I am in the process of upgrading my Gentoo system and all that is stgill
to be done is LVM2

My current install is the following

host ~ # lvm version
  LVM version:     2.01.09 (2005-04-04)
  Library version: 1.01.00-ioctl (2005-01-17)
  Driver version:  4.4.0
host ~ # df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/md2               1003932     64952    938980   7% /
/dev/vg/usr           10485436   3729092   6756344  36% /usr
/dev/vg/var           10485436    636380   9849056   7% /var
/dev/vg/tmp            4194172    494092   3700080  12% /tmp
/dev/vg/opt            4194172     35928   4158244   1% /opt
/dev/vg/home           4194172   3041392   1152780  73% /home
none                    248632         0    248632   0% /dev/shm
host ~ # 


The latest Gentoo version for LVM2 is

host ~ # emerge -p lvm2

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] sys-fs/device-mapper-1.02.10-r1 [1.01.00] USE="(-selinux)" 
[ebuild     U ] sys-fs/lvm2-2.02.06 [2.01.09] USE="-clvm% -cman% -gulm% -nolvm1% -nomirrors% -nosnapshots% (-selinux)" 
host ~ # 

Are there any problems i could expect when upgrading? 
Especially in the volume names or in the mapping of volume name to device
name for /etc/fstab.

Thanks in advance
-- 
Fred

Doubt is an uncomfortable situation, but certainty is an absurd one
	-- Voltaire

Re: [linux-lvm] How do you mount a snapshot?

[Chris Mason]

On Thursday, December 07, 2000 22:33:00 -0800 David Gould <dg@suse.com>
wrote:

> On Thu, Dec 07, 2000 at 03:56:11PM -0500, Chris Mason wrote:

[ snapshots ]

>> It should work with ext2.
> 
> Really? I wonder. Maybe right after a sync before anything gets dirtied,
> but otherwise, how could the disk image be consistantly, er, consistant?
> And would not e2fsck have the same issues about writing?
> 
> Or did I just wake up pessimistic today?
> 

The reason it will not work on reiserfs without the extra API is that on
reiserfs, sync == commit to log, not commit to disk.  So, there is no way
over the command line (or in the kernel) to ask the FS to sync to disk,
even when there is no traffic at all on the FS.

With ext2, if nothing is going on, you can type sync and have all the
buffers on disk.  It is at least possible ;-)  It would be better if ext2
could provide the write suspension hooks as well, but I'm guessing that
will be done in ext3 first (where the journal already does most of the
work).

In my mind, the people that need snapshots the most are the database
programs, where disk traffic can be carefully controlled. So the current
ext2 method is still useful.

-chris

[linux-lvm] LVM Upgrade

[Magnus Naeslund(f)]

Hello, this is for sure a newbie question, but i havent found any docs about
it.
I am running 2.2.16 + LVM 0.8 (a Suse precompiled kernel) and want to
upgrade to 0.9.
If i just patch 2.2.17 vanilla + LFS + LVM + RAWIO, compile, install and
reboot, using the 0.9 lvm tools, it doesnt work.
What commands should i use?
vgscan doesnt work...

Magnus

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 Programmer/Networker [|] Magnus Naeslund
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