topic LVM problem in Operating System - Linux

LVM problem

Ebi — Thu, 25 Sep 2008 14:02:35 GMT

Hello,
Beside others I partitioned the following two logical volumes on my hard drive (single hdd 500Gb with Fedora 9) - lvs:

LV VG Attr LSize Origin Snap% Move Log Copy% Convert
LogVol05 VolGroup00 -wi-ao 19.53G
LogVol06 VolGroup00 -wi-a- 205.06G

with the following mount points (/etc/fstab):

/dev/VolGroup00/LogVol05 /var ext3 defaults 1 2
/dev/VolGroup00/LogVol06 /var/lib/mysql ext3 defaults 1 2

When I populated my MySQL databases the process stopped and I found that /var is completely full. I checked /var/lib/mysql, which is there and contained the database I had installed. After removing the bigger DB df showed the following:

Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol05
20G 5.0G 14G 28% /var

but nothing about /dev/VolGroup00/LogVol06 where I though I would have my databases stored.

Can anyone tell me why this problem occurred and how can I assign /var/lib/mysql to LogVol06

Thanks,
Ebi

Re: LVM problem

Ivan Ferreira — Thu, 25 Sep 2008 14:56:44 GMT

First, ensure you can mount LogVol06:

mount /dev/VolGroup00/LogVol06 /mnt

Then, copy the content of /var/lib/mysql to /mnt

cp -av /var/lib/mysql/* /mnt

Now, ensure that the Mysql database is stopped and mount the LogVol06 into /var/lib/mysql

umount /mnt
mount /dev/VolGroup00/LogVol06 /var/lib/mysql

Post any errors that you may receive during this procedure.

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Re: LVM problem

Ebi — Fri, 26 Sep 2008 10:40:42 GMT

Thanks Ivan, that solved my problem with the exception, that after rebooting I had to mount LogVol06 manually despite the fact that my /etc/fstab contains the line:

/dev/VolGroup00/LogVol06 /var/lib/mysql ext3 defaults 1 2

Is there any way to get it mounted at boot time?

Ebi

Re: LVM problem

Sandeep_Chaudhary — Fri, 26 Sep 2008 10:57:11 GMT

add the entry in /etc/fstab

/dev/VolGroup00/LogVol06 /var/lib/mysql ext3 defaults 1 2

Re: LVM problem

benoit Bruckert — Fri, 26 Sep 2008 13:33:17 GMT

Be carefull in the order,
/var/lib/mysql should be after /var.
hope that help