====== LVM_on_XEN_(dom0) ======

====== LVM (Linux Volume Manager) is installed on the Free/Unallocated space ======
LVM allows for great flexibility when allocating Hard disk partitions. The reason partitions are used is because: of seperate xen host servers, and for providing for a more stable server: if /var/tmp is filled up - the server can still function, as other partitions are unaffected.
 
  * Check if there is partitions available.
 cfdisk
  * If a partition is made via cfdisk - a reboot maybe required for udev to pick it up.
  * The commands listed below should be self-explainatory.

 apt-get install lvm2
 pvcreate /dev/sda3
 pvcreate /dev/sdb2
 vgcreate main-vol /dev/sda3 /dev/sdb2
 vgscan
 
 lvcreate -n zachome --size 50g main-vol
 lvcreate -n zachomeswp --size 1g main-vol
 
 mkfs.ext3 /dev/main-vol/zachome
 mkswap /dev/main-vol/zachomeswp 
 
 resize2fs /dev/main-vol/zachome 40000
 lvreduce -L-10g /dev/main-vol/zachome   #subtract 10Gb from current size!
 
 pvscan
 
 lvscan
===== Increase the Size of an LVM Partition =====
 <nowiki>//</nowiki>umount the partition or poweroff the domU server.
 <nowiki>//</nowiki>the commands below should be available on the dom0 or main server.
 lvextend -L+10G /dev/main-vol2/twister   <nowiki>//</nowiki>extend the LinuxVolume. Add 10 gigabytes to the present size.
 e2fsck -f /dev/main-vol2/twister         <nowiki>//</nowiki>Run a (forced) check on the filesystem
 resize2fs /dev/main-vol2/twister       <nowiki>//</nowiki>resize the filesystem

===== Increase size of an LVM Swap Partition =====
 swapoff -v /dev/VolGroup00/LogVol01
 lvm lvresize /dev/VolGroup00/LogVol01 -L +256M
 mkswap /dev/VolGroup00/LogVol01
 swapon /dev/VolGroup00/LogVol01

====== Shrink Size of a LVM Partition ======
 e2fsck -f /dev/vg0/vm07-root
 resize2fs -p /dev/vg0/vm07-root 10G
 lvresize -L 11G /dev/vg0/vm07-root
 e2fsck -f /dev/vg0/vm07-root
 resize2fs -p /dev/vg0/vm07-root
 
 http://fedorasolved.org/Members/zcat/shrink-lvm-for-new-partition

----
Main One = http://www.debian-administration.org/articles/410

http://www.netadmintools.com/art367.html

http://www.netadmintools.com/art366.html