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How To Automatically Resize Logical Volume

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https://www.centos.org – Googleresize ext3 lvmOne can theoretically expand an ext3 filesystem online now, but I would not trust doing in on a production machine. ... [by pschaff] (Distributions)

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Submitted by jiqi2 on 02/17/2010 – Made popular on 02/17/2010

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hi everybody,

i have two ext3 partitions within an encrypted lvm2 volume. when i start up my system it says that there are 0.3% non contiguous blocks.

This is my steup:

/dev/sda1/ /boot

/dev/sdb2 Volumegroup System / 42 GB ext3 Logical Volume root /home 108 GB ext3 Locigal Volume home

I am trying to convert a root ext3 filesystem to ext4. So i ran

tune2fs -O extents,uninit_bg,dir_index /dev/sda1

Then I changed the filesystem type from ext3 to ext4 in /etc/fstab and then added rootfstype to the grub config files. I've rebooted assuming that the kernel would just fsck on its own but it hasn't come up (headless remote machine).

I have a XenServer6 VM with Debian Squeeze 64bit and only 1 partition /dev/xvda1 95 GB + linux partitions:

Filesystem Size Used Avail Use% Mounted on /dev/xvda1 95G 63G 28G 70% / tmpfs 2.0G 0 2.0G 0% /lib/init/rw udev 2.0G 68K 2.0G 1% /dev tmpfs 2.0G 0 2.0G 0% /dev/shm

I used the XenCenter to resize

I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 filesystem. Occasionally, this application pauses for several seconds at a time. I suspect that ext3 journaling is the culprit.

What steps can I take to confirm or refute this theory? I am aware of iostat and /proc/diskstats as starting points.

Hi!

Today i resized one (umounted) logical (lvm) volume and tried resizing the (ext4)fs on it with resize2fs. It was not working with the message: "Device or ressource busy - no superblock found"

only after mounting the fs the "online resize" was working. So why does offline resize not work on a logical volume?

I just saw an answer question about filesystems for embedded hardware on another Stack Exchange site. The question was "What file system format should I use on flash memory?" and the answer suggested the ext2 filesystem, or the ext3 filesystem with journaling disabled a'la tune2fs -O ^has_journal /dev/sdbX

This made me wonder...

Our junior sysadmin accidently deleted some of the directories. Can anyone please suggest any free/proprietory application to recover files from an EXT3 filesystem (RHEL 5.x) ?

Thanks.

Resize ext3 during install 3 years 22 weeks ago

I would suggest that you don't do it.

I've been using Kubuntu for several years now (and Fedora and RedHat before that) and decided to give openSuse a try. Looking for more love for the KDE version of my distro basically. Anyway, the install was pretty rough.

I have no experience of migrating the root partition from ext3 to xfs but if you really wish to do so, the technique you have outlined is certainly viable.As to whether yo... [by AlanBartlett]