Re: Online resizing support for ext3 in RHEL 4

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Date: Fri, 19 Aug 2005 10:28:57 -0500
To: General Red Hat Linux discussion list <redhat-list@redhat.com>

RHEL questions should be posted to the distribution-specific lists, not
redhat-list. You'll get far better reponses that way since the Red Hat
engineers hang out there more than here.

taroon-list: RHEL 3
nahant-list: RHEL 4

On Fri, Aug 19, 2005 at 09:20:00AM -0500, Justin Conover wrote:
> QUOTE
> "Alex asked:
>
> I've got some AIX/HP-UX/Solaris sysadmins around my office that
> complain that the Red Hat Enterprise Linux platform is weak because it
> does not support the resizing of mounted filesystems.

You know, Solaris doesn't really support online resizing either. You
can extend a logical volume, you but you sure as heck can't extend the
size of a given partition, at least in Solaris 9 (so says my Solaris
admin).

> I did some basic google searching and it appears they're correct, to
> expand an ext3 filesystem you have to unmount it. Is support for
> online resizing going to be added to ext3 soon? Will Red Hat
> Enterprise Linux ever support it? To which Shadowman replies:
>
> Online resizing support for ext3 hit the mainline kernel in 2.6.10
> last November or thereabouts. The tools to take advantage of this
> support are in e2fsprogs 1.36.
>
> None of this code is in Red Hat Enterprise Linux 4 (kernel 2.6.9 and
> e2fsprogs 1.35), but all of it is in Fedora Core 4 (kernel 2.6.11 and
> e2fsprogs 1.37). Therefore, it's an exceedingly good bet that online
> resizing will be available, and very well baked, in Enterprise Linux
> 5. "
>
> /QUOTE
>
> Is shadowman wrong? I use a rhel 4 clone at home on a server and I
> know I use ext2online often.

According to the Red Hat documentation and the nahant mailing lists,
Shadowman is wrong. Online expansion is in RHEL 4. You can't reduce
the size of a volume online though. You can do an rpm -q --changelog on
the kernel and e2fsprogs rpms.

I'd like to see you repost this to nahant-list. It's tough to fathom
that shadowman could be wrong on this and I am most definitely NOT the
right person to contradict him.

-- 
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts@ewilts.org
Member #1, Red Hat Community Ambassador Program
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• Previous message: Bill Tangren: "Re: wireless client"
• In reply to: Justin Conover: "Online resizing support for ext3 in RHEL 4"
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