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RE: [linux-lvm] Newbie questions



Michael/Heinz

Thanks for the answers.

Read a lil' more and have one more question. From a application point of
view, would the resize utility (extonline) take care of application flushing
or not?

If it does, how? If not, wouldn't you need to take care of that?

Thanks.
-mayank.


-----Original Message-----
From: linux-lvm-admin sistina com [mailto:linux-lvm-admin sistina com]On
Behalf Of Heinz J. Mauelshagen
Sent: Wednesday, January 24, 2001 3:28 PM
To: linux-lvm sistina com
Subject: Re: [linux-lvm] Newbie questions


On Wed, Jan 24, 2001 at 02:21:20PM -0800, Mayank Vasa wrote:
> Hi,
>
> I am new to LVM and have some basic questions:
>
> 1) From the documentation I have read, I think once you extend/reduce a LV
> or VG you don't need to reboot the system. Correct?

Correct.

>
> 2) Assuming 1 is correct, how is the filesystem made aware of the changes?
> I'd like to understand the flow of this too.

Its size needs to be changed in a seperate step.
With ext2 there's Ted Tso's offline resizer and for eg. Andreas Dilger's
online resizer.
With reiserfs there's an online extender and offline shrinker available.

>
> 3) What are LVM snapshots?

Another LV exposing a "frozen" image of a preexisting LV.

IOW: you create another LV (the snapshot LV) which is "connected" to an
     already exiting one (called original LV in this context).
     The snapshot LV doesn't change its content while the original LV can
     still be updated (changed).

>
> TIA.
> -mayank.
>
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm sistina com
> http://lists.sistina.com/mailman/listinfo/linux-lvm

--

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
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen Sistina com                           +49 2626 141200
                                                       FAX 924446
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