Re: resizing LUN (not file system) while the file system (ext3) i sonline

[Limin Wang <lance.lmwang@gmail.com>]

keith,

If you PV has free space, then you can create a new partition with the
free space, pvcreate it and vgextend your volume group. Yes, you have to 
resize the file system as well. 

Thanks,
Limin
* Kearnan_Keith@emc.com <Kearnan_Keith@emc.com> [2006-05-25 09:11:34 -0400]:

> 
> Hi folks,
> 
> Since I am the author of the EMC knowledge base article (emc122304)
> mentioned I feel I should respond to this thread.
> 
> 
> Andrey,
> 
> You are correct.  Overcautious is exactly what I was shooting for...so it
> worked.  Remember, complete newbies (Windows Admins that get Linux added to
> their responsibility) read these knowledge base articles and then try them
> out on their company's vital data.  
> 
> 
> Limin,
> 
> LVM can be done online by adding an additional PV.  I've had a customer
> expand their single PV "behind the scenes".  Is there a way to get LVM to
> recognize a resized PV?  If so please share because I couldn't find a
> command to do it.
> 
> 
> Stephen,
> 
> The article is dated 11/18/2005 and states "ext3 does not support online
> expansion...yet".  So yes it is very out of date.
> 
> I will get to work updating emc122304.  Did this behavior start in base
> RHEL4 (2.6.9-5)?  
>    
> 
> Cheers,
> 
> -Keith
> 
> -----Original Message-----
> From: linux-scsi-owner@vger.kernel.org
> [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Stephen C. Tweedie
> Sent: Thursday, May 25, 2006 7:46 AM
> To: admitriev@mentora.com
> Cc: linux-scsi@vger.kernel.org; Stephen Tweedie
> Subject: Re: resizing LUN (not file system) while the file system (ext3)
> isonline
> 
> Hi,
> 
> On Thu, 2006-05-25 at 01:16 -0400, Andrey Dmitriev wrote:
> 
> > I understand that ext3 doesn't support online expansion (not in RedHat
> ES/AS
> > at least)
> 
> Yes it does, and it should work fine in RHEL-4, or FC-3 or later.  Ted
> just integrated the online resize user-space tools into upstream
> e2fsprogs a couple of months ago, and only this week he turned on the
> resize inode feature in mke2fs by default.
> 
> > However, just because the disk array can be done online that does not mean
> > the application layer can handle online expansion (some file systems can
> > handle online expansion, currently ext3 cannot)."
> 
> Out-of-date information. :-)
> 
> Cheers,
>  Stephen
> 
> 
> -
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