lvm_handling
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lvm_handling [2011/09/21 18:50] root |
lvm_handling [2017/04/16 23:50] (current) root [Prepare new disk/VolumeGroup/Logical Volume] |
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| ===== Prepare new disk/VolumeGroup/Logical Volume ===== | ===== Prepare new disk/VolumeGroup/Logical Volume ===== | ||
| + | |||
| + | Add disk/LUN to server. Have a look at [[rescan_scsi_bus|Rescan SCSI bus]] for scanning the SCSI bus online. Alternative reboot the server. | ||
| Prepare PV's with | Prepare PV's with | ||
| Line 14: | Line 16: | ||
| | | ||
| Create filesytem | Create filesytem | ||
| + | |||
| + | EXT FS: | ||
| mkfs.ext4 -F -b 4096 /dev/<vgname>/<lvname> | mkfs.ext4 -F -b 4096 /dev/<vgname>/<lvname> | ||
| Depending on distribution use relevant ext2/ext3/ext4 file system type. | Depending on distribution use relevant ext2/ext3/ext4 file system type. | ||
| + | XFS FS: | ||
| + | mkfs.xfs /dev/<vgname>/<lvname> | ||
| ===== Resize existing Logical volume ===== | ===== Resize existing Logical volume ===== | ||
| Line 29: | Line 35: | ||
| Resize Physical Volume | Resize Physical Volume | ||
| pvresize /dev/<device> | pvresize /dev/<device> | ||
| + | |||
| + | If LUN is under multipath: | ||
| + | multipathd resize map <multipath_device> | ||
| + | |||
| + | Where <multipath_device> is mpath<x> or wwid depending on multipath configuration. | ||
| Extend Logical Volume | Extend Logical Volume | ||
| Line 35: | Line 46: | ||
| Extend filesytem which resides on Logical Volume | Extend filesytem which resides on Logical Volume | ||
| + | |||
| + | EXT FS: | ||
| resize2fs /dev/<vgname>/<lvname> | resize2fs /dev/<vgname>/<lvname> | ||
| + | |||
| + | XFS FS: | ||
| + | xfs_growfs /dev/<vgname>/<lvname> | ||
| [[https://access.redhat.com/kb/docs/DOC-9855]] | [[https://access.redhat.com/kb/docs/DOC-9855]] | ||
| + | |||
| + | ===== Resize swap on Logical volume ===== | ||
| + | |||
| + | Determine which LV is in use by swap space | ||
| + | |||
| + | grep swap /etc/fstab | ||
| + | Example of output: | ||
| + | /dev/mapper/VolGroup00-LogVol01 swap swap defaults 0 0 | ||
| + | |||
| + | Disable swap: | ||
| + | | ||
| + | swapoff /dev/mapper/VolGroup00-LogVol01 | ||
| + | |||
| + | Resize swap space. | ||
| + | |||
| + | In this example swap spaze is adjusted to 4GB. | ||
| + | |||
| + | lvresize -L 4G /dev/mapper/VolGroup00-LogVol01 | ||
| + | |||
| + | Setup swap area on LV | ||
| + | |||
| + | mkswap /dev/mapper/VolGroup00-LogVol01 | ||
| + | |||
| + | Enable swap space again | ||
| + | |||
| + | swapon /dev/mapper/VolGroup00-LogVol01 | ||
| + | | ||
| + | Verify with top or /proc/swaps: | ||
| + | | ||
| + | top | ||
| + | |||
| + | output:\\ | ||
| + | top - 13:32:16 up 14 min, 2 users, load average: 0.22, 0.08, 0.02\\ | ||
| + | Tasks: 138 total, 2 running, 136 sleeping, 0 stopped, 0 zombie\\ | ||
| + | Cpu(s): 4.2%us, 1.5%sy, 0.0%ni, 93.0%id, 1.1%wa, 0.0%hi, 0.1%si, 0.0%st\\ | ||
| + | Mem: 3925256k total, 486996k used, 3438260k free, 102092k buffers\\ | ||
| + | //**Swap: 4194296k total**//, 0k used, 4194296k free, 118264k cached | ||
| + | |||
| + | cat /proc/swaps | ||
| + | Filename Type Size Used Priority | ||
| + | /dev/dm-1 partition 4194296 0 -1 | ||
| + | |||
| + | |||
| + | |||
lvm_handling.1316631024.txt.gz ยท Last modified: 2011/09/21 18:50 by root
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