Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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1. Create a GFS file system on the logical volume with the
gfs_mkfs
command.
2. Create a new mount point with the
mkdir
command. In a clustered system, create the mount
point on all nodes in the cluster.
3. Mount the file system. You may want to add a line to the
fstab
file for each node in the
system.
Alternately, you can create and mount the GFS file system with the LVM GUI.
Creating the LVM volume is machine independent, since the storage area for LVM setup
information is on the physical volumes and not the machine where the volume was created.
Servers that use the storage have local copies, but can recreate that from what is on the
physical volumes. You can attach physical volumes to a different server if the LVM versions are
compatible.
3. Growing a File System on a Logical Volume
To grow a file system on a logical volume, perform the following steps:
1. Make a new physical volume.
2. Extend the volume group that contains the logical volume with the file system you are
growing to include the new physical volume.
3. Extend the logical volume to include the new physical volume.
4. Grow the file system.
If you have sufficient unallocated space in the volume group, you can use that space to extend
the logical volume instead of performing steps 1 and 2.
4. Logical Volume Backup
Metadata backups and archives are automatically created on every volume group and logical
volume configuration change unless disabled in the
lvm.conf
file. By default, the metadata
backup is stored in the
/etc/lvm/backup
file and the metadata archives are stored in the
/etc/lvm/archive
file. How long the the metadata archives stored in the
/etc/lvm/archive
file are kept and how many archive files are kept is determined by parameters you can set in the
lvm.conf
file. A daily system backup should include the contents of the
/etc/lvm
directory in
the backup.
Note that a metadata backup does not back up the user and system data contained in the
logical volumes.
You can manually back up the metadata to the
/etc/lvm/backup
file with the
vgcfgbackup
command. You can restore metadata with the
vgcfgrestore
command. The
vgcfgbackup
and
Chapter 3. LVM Administration Overview
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