Extending Swap On An Lvm2 Logical Volume; Creating An Lvm2 Logical Volume For Swap - Red Hat ENTERPRISE LINUX 4 System Administration Manual

Chapter 11. Swap Space

11.2.1. Extending Swap on an LVM2 Logical Volume

To extend an LVM2 swap logical volume (assuming /dev/VolGroup00/LogVol01 is the volume
you want to extend):
1. Disable swapping for the associated logical volume:
# swapoff -v /dev/VolGroup00/LogVol01
2. Resize the LVM2 logical volume by 256 MB:
# lvm lvresize /dev/VolGroup00/LogVol01 -L +256M
3. Format the new swap space:
# mkswap /dev/VolGroup00/LogVol01
4. Enable the extended logical volume:
# swapon -va
5. Test that the logical volume has been extended properly:
# cat /proc/swaps # free

11.2.2. Creating an LVM2 Logical Volume for Swap

To add a swap volume group (assuming /dev/VolGroup00/LogVol02 is the swap volume you
want to add):
1. Create the LVM2 logical volume of size 256 MB:
# lvm lvcreate VolGroup00 -n LogVol02 -L 256M
2. Format the new swap space:
# mkswap /dev/VolGroup00/LogVol02
3. Add the following entry to the /etc/fstab file:
/dev/VolGroup00/LogVol02 swap swap defaults 0 0
4. Enable the extended logical volume:
# swapon -va
5. Test that the logical volume has been extended properly:
# cat /proc/swaps # free
104