Hello,
I'm playing with lvm snapshots for the first time,
and wondering the meaning of -L when creating a snapshot. Indeed,
the following example shows a snapshot done with -L10M, on a
volume that's already 156M used for a total of 2G;
[root@shinwey root]# df /vservers/skel/ -h
Filesystem Size Used Avail Use% Mounted on
/dev/nr_180/skel 2.0G 156M 1.8G 9% /vservers/skel
[root@shinwey root]# lvcreate -L10M --snapshot --name snaptest
/dev/nr_180/skel
lvcreate -- rounding size up to physical extent boundary
lvcreate -- WARNING: the snapshot will be automatically disabled once it
gets full
lvcreate -- INFO: using default snapshot chunk size of 64 KB for
"/dev/nr_180/snaptest"
lvcreate -- doing automatic backup of "nr_180"
lvcreate -- logical volume "/dev/nr_180/snaptest" successfully created
[root@shinwey root]# mount /dev/nr_180/snaptest /mnt/snaptest/
mount: block device /dev/nr_180/snaptest is write-protected, mounting
read-only
[root@shinwey root]# df -h /mnt/snaptest/
Filesystem Size Used Avail Use% Mounted on
/dev/nr_180/snaptest 2.0G 156M 1.8G 9% /mnt/snaptest
Who can explain the usage of -L10M for my snapshot ?
Best Regards,
Olivier Kaloudoff
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