ext3 can't be extended while online

I'm curious if anybody out there knows what the runaround is for using
unsupported Linux features (specifically reiserfs) with RedHat AS.  ext3
does not support online filesystem growing - I have been using this
feature on my systems for almost two years now with reiserfs.  Of
course, it has been of great utility and I have no intention of taking a
step backwards with ext3, so I will be using one of reiserfs, jfs, or
xfs, all of which support online resizing.

I realize that reiserfs is available in the kernel-unsupported RPM - I
will likely be using that.  I also realize that 3.0 is pretty much
finalized and it's too late to fix this shortcoming.  The only reason
we're buying Redhat is because my DBA's need to be able to call Oracle
support for products running on these servers.  Will that little tool
Oracle has for verifying that you're running Redhat catch something like
an unsupported filesystem?

Thoughts?
-Al Tobey

---

root@hostname: /root >resize2fs /dev/vgroot/lv_test01
resize2fs 1.34 (25-Jul-2003)
/dev/vgroot/lv_test01 is mounted; can't resize a mounted filesystem!

---

# lv_test00 is mounted on /mnt/test00
# the following operation is something I do on my production
# systems all the time

root@hostname: /root > df -h /mnt/test00
Filesystem             Size  Used Avail Use% Mounted on
/dev/vgroot/lv_test00  7.9G  7.5G 467M  95%  /mnt/test00

root@hostname: /root >lvextend -L +50M /dev/vgroot/lv_test00
lvextend -- rounding relative size up to physical extent boundary
lvextend -- extending logical volume "/dev/vgroot/lv_test00" to 7.93 GB
lvextend -- doing automatic backup of volume group "vgroot"
lvextend -- logical volume "/dev/vgroot/lv_test00" successfully extended

root@hostname: /root >resize_reiserfs /dev/vgroot/lv_test00

<-------------resize_reiserfs, 2001------------->
reiserfsprogs 3.x.0j

root@hostname: /root > df -h /mnt/test00
Filesystem             Size  Used Avail Use% Mounted on
/dev/vgroot/lv_test00  7.9G  7.5G 519M  94%  /mnt/test00








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