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Re: [linux-lvm] Newbie question

On Fri, Jul 13, 2001 at 12:33:31PM -0300, Leandro Lucarella wrote:
> El Fri, 13 Jul 2001 13:12:00 +0200 Heinz J. Mauelshagen <Mauelshagen sistina com> escribió:
> HJM> On Thu, Jul 12, 2001 at 11:53:58AM -0300, Leandro Lucarella wrote:
> HJM> > Hi, I'm new in LVM (I'm so new that I'm not even using it :) and I have a
> HJM> > question:
> HJM> > 
> HJM> > I want to know if the stiper mode, the performance gain is somparable to Software
> HJM> > RAID 0.
> HJM> 
> HJM> In theory they should be pretty similar :-)
> HJM> 
> HJM> But people reported differences which are probably caused by their particular
> HJM> hardware setup.
> HJM> 
> HJM> In order to answer the question for your particular configuration, you should
> HJM> test both ;-)
> Fair enought for me! LVM has some good advanges so if the performance is
> comparable, I'm with LVM! ;)
> Now I have a question. I read the HOWTO migrate the old root partition to a
> LV, and the method is to make a LV on another HD (or the same if it's
> room), copy the root FS to this LV, delete the old partition and add it to
> the new LV. My question is. It's possible to make a VG without striping
> ('cause I have just 1 HD in the begining) and then, when I add the old
> partition to the VG, make this VG to do striping????

No, as stated in another answer.

> (I'm really sory about my primitive english... ;)

You shouldn't be. My own is primitive too ;-)

> HJM> > Another question is the boot stuff, what is better? compile LVM as a module
> HJM> > and use inird or compile the kernel with built-in LVM support?
> HJM> 
> HJM> It doesn't make a difference if you go for the module or the build in driver,
> HJM> you need to have an initrd today anyway to activate your VGs at boot time.
> HJM> 
> HJM> We are working on boot time recognition of VGs in the driver which will vanish
> HJM> the initrd. That will be in a post 1.0 version of the Linux LVM.
> OK, initrd is allways needed until 1.0...

No, it will be needed at least including 1.0.
We'll enhance that later.

> And how close we are to this release??? ;)
> --
> LUCA - Leandro Lucarella
> ------------------------
> luca lucarella com ar
> http://www.luca.2y.net
> LICQ UIN: 2847576
> ------------------------
> Usando Debian GNU/Linux
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html


Heinz    -- The LVM Guy --

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


Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446

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