Create XFS file system based on LVM with Ubuntu

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Introduction

LVM is a tool used for volume management which includes striping, resizing and mirroring of logical volumes, and XFS is an high performance file system created by silicon graphics, it is the default file system for Rhel7/CentOS 7 operating systems, it supports quick crack recovery, is is used when large amount of data is required to be stored.Some of LVM based articles has been published already with unixmen.com, you can access some of them on following links:

http://www.unixmen.com/increase-disk-space-and-memory-in-linux-vmware-virtual-machines/

http://www.unixmen.com/backup-restore-lvm-opensuse-42-1/

Procedure

We will be using Ubuntu 15.10 ,add some extra hard disk space to Your demo system, let us have a extra piece of 10 GB space:

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# fdisk /dev/sdb

Create primary file system, change File system, by typing t, and have a look on available file systems and select 8e type file system, save and exit:

Welcome to fdisk (util-linux 2.26.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x8d3381ac.

Command (m for help): p
Disk /dev/sdb: 1.1 GiB, 1138817024 bytes, 2224252 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x8d3381ac

Command (m for help): n
Partition type
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): o
Value out of range.
   p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 
First sector (2048-2224251, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-2224251, default 2224251): 

Created a new partition 1 of type 'Linux' and of size 1.1 GiB.

Command (m for help): t          <-FILE SYSTEM TYPE
Selected partition 1
Partition type (type L to list all types): 8e      <-SELECTED FILE SYSTEM TYPE
Changed type of partition 'Linux' to 'Linux LVM'.

Command (m for help): w          <-SAVE AND EXIT
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

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Create LVM

First Create physical volume, then Volume group followed by Logical volume:

root@user:/home/user# pvcreate /dev/sdb1
 Physical volume "/dev/sdb1" successfully created
root@user:/home/user# vgcreate um_vg /dev/sdb1
 Volume group "um_vg" successfully created
root@user:/home/user# lvcreate -L +1G -n xfs_lv um_vg   
 Logical volume "xfs_lv" created.

Now, create XFS file system, before that install xfs file system utilities in Ubuntu

# apt-get install xfsprogs

Create a directory where this xfs file system will be mounted

# mkdir /home/user/xfs

Create .xfs file system

# mkfs.xfs /dev/um_vg/xfs_lv

Sample output

Display all 214 possibilities? (y or n)
root@user:/home/user# mkfs.xfs /dev/um_vg/xfs_lv 
meta-data=/dev/um_vg/xfs_lv      isize=256    agcount=4, agsize=65536 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=262144, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

Mount file system on the created  directory

# mount -t xfs /dev/um_vg/xfs_lv /home/user/xfs/

Have a look

# df -Th /home/user/xfs/
Filesystem               Type  Size  Used Avail Use% Mounted on
/dev/mapper/um_vg-xfs_lv xfs  1014M   33M  982M   4% /home/user/xfs

Extend LVM size

root@user:/home/user# lvextend -L +10M /dev/um_vg/xfs_lv -r

Sample output

  Rounding size to boundary between physical extents: 12.00 MiB
  Size of logical volume um_vg/xfs_lv changed from 1.01 GiB (259 extents) to 1.02 GiB (262 extents).
  Logical volume xfs_lv successfully resized
meta-data=/dev/mapper/um_vg-xfs_lv isize=256    agcount=4, agsize=65536 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=262144, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 262144 to 268288

Again have a look on mounted file system whether it got extended or not

#df -h /dev/um_vg/xfs_lv

Sample output

Filesystem                Size  Used Avail Use% Mounted on
/dev/mapper/um_vg-xfs_lv  1.1G   33M 1006M   4% /home/user/xfs

Now, compare with previous file size, you will notice that file system size got increased automatically as we are using XFS file system.

Have a nice day!!