[linux-lvm] Differences between LVM1 and LVM2

[linux-lvm] Differences between LVM1 and LVM2

[Tomas Roos]

Hi.

I have been using LVM for about a year now at a number of machines. One 
I have had in production for about 4 months I think. I have never had 
any problems with this piece of software .. very stable.

I would like to know what to think about when upgrading to LVM release 2

Best regards
/Tomas

Re: [linux-lvm] Differences between LVM1 and LVM2

[Heinz J . Mauelshagen]

On Tue, Nov 19, 2002 at 08:51:23PM +0100, Tomas Roos wrote:
> Hi.
> 
> I have been using LVM for about a year now at a number of machines. One 
> I have had in production for about 4 months I think. I have never had 
> any problems with this piece of software .. very stable.
> 
> I would like to know what to think about when upgrading to LVM release 2

LVM2 is metadata and command line compatible to LVM1 plus it adds some nice
features such as a configuration file with various sections for device name
filtering and more.
You have the choice with it to upgrade your metadata to a more redundant format2
which causes updates to the metadata to be transaction oriented therefore
enhancing the online recoverablilty of the LVM system.

We still declare LVM2 to be in Beta _because_ it misses the soon to be added
feature to online relocate data (pvmove).

It is stable and you should give it a try :)

> 
> Best regards
> /Tomas
> 
> 
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
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                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
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Re: [linux-lvm] Differences between LVM1 and LVM2

[Samuli Suonpaa]

"Heinz J . Mauelshagen" <mauelshagen@sistina.com> writes:
> We still declare LVM2 to be in Beta _because_ it misses the soon to
> be added feature to online relocate data (pvmove).

How about documentation? I still haven't seen any documentation that
would really give me a change to _understand_ what's the relation
between DM and LVM2 or how I should set up my system. Something
similar to LVM-HOWTO, I mean.

Should I do most things just like I'm used to with LVM tools
(pvcreate, vgcreate, lvcreate and then just mount) or should I use
dmsetup for something - and for what?

Oh, and now that I'm already writing this on the list, I might as well
ask a few questiong about used and usable versions as well.

My laptop and my home-server are both running Debian Testing. Packages
lvm2-1.95.10-2 andf dmsetup-0.96.04-2 and libdevmapper0-0.96.04-2 are
available, both packaged by Andres Solomon. I guess I'd have to
install these? Will these work with - for instance - kernels
2.4.20-rc1-ac4 and 2.5.47-ac6 or should I patch my kernels?

Suonp��...

Re: [linux-lvm] Differences between LVM1 and LVM2

[Joe Thornber]

On Thu, Nov 21, 2002 at 01:22:26PM +0200, Samuli Suonpaa wrote:
> between DM and LVM2 or how I should set up my system. Something
> similar to LVM-HOWTO, I mean.

DM is the kernel driver, LVM2 is a userland application that uses DM
to set up the volumes.

> Should I do most things just like I'm used to with LVM tools
> (pvcreate, vgcreate, lvcreate and then just mount) or should I use
> dmsetup for something - and for what?

You don't need dmsetup - think of dmsetup as an alternate (and very
simple) volume manager that uses DM.

> My laptop and my home-server are both running Debian Testing. Packages
> lvm2-1.95.10-2 andf dmsetup-0.96.04-2 and libdevmapper0-0.96.04-2 are
> available, both packaged by Andres Solomon. I guess I'd have to
> install these? Will these work with - for instance - kernels
> 2.4.20-rc1-ac4 and 2.5.47-ac6 or should I patch my kernels?

The packages you mention should work with those two kernels.

- Joe

Re: [linux-lvm] Differences between LVM1 and LVM2

[Samuli Suonpaa]

Joe Thornber <joe@fib011235813.fsnet.co.uk> writes:
> On Thu, Nov 21, 2002 at 01:22:26PM +0200, Samuli Suonpaa wrote:
>> My laptop and my home-server are both running Debian Testing. Packages
>> lvm2-1.95.10-2 andf dmsetup-0.96.04-2 and libdevmapper0-0.96.04-2 are
>> available, both packaged by Andres Solomon. I guess I'd have to
>> install these? Will these work with - for instance - kernels
>> 2.4.20-rc1-ac4 and 2.5.47-ac6 or should I patch my kernels?
> The packages you mention should work with those two kernels.

Yes, they do seem to do exactly what I wanted. Thanks.

Suonp��...