LVM Question

Mark McCulligh mmcculli at visualtech.ca
Tue Dec 20 18:12:54 UTC 2005



Waldher, Travis R wrote:

>  
>
>>-----Original Message-----
>>From: Mark McCulligh [mailto:mmcculli at visualtech.ca]
>>    
>>
>>>      
>>>
>>Using building Web Servers or Email Servers, for the /home using came
>>grow fast (sometimes make a /www folder).  I was just wondering why in
>>Red Hat's manual they would create a LVM Volume Group, then in the
>>Logical Volumes they add a fixed /home directory?  Because the /home
>>    
>>
>can
>  
>
>>grow the most would not it be better to have it under the / Logical
>>Volume for you do not run out of space. Just a little puzzled by Red
>>Hat's Example.
>>
>>    
>>
>
>The reason being...
>
>If /home is actually under the / filesystem the users can fill up your
>root filesystem. Which is bad.
>
>/home should be it's own LVM partition
>
>My filesystems are actually:
>
>/dev/cciss/c0d0p1	512M	20M	439M	5%	/boot
>/dev/vg00/lvol1   2048M	254M	1.7G	14%	/
>/dev/vg00/lvol2	512M	8.1M	463M	2%	/home
>/dev/vg00/lvol3	1024M	0	1007M	0%	/dev/shm
>/dev/vg00/lvol4	2048M	76M	1.8G	4%	/var
>/dev/vg00/lvol6	2048M	33M	1.9G	2%	/tmp
>/dev/vg00/lvol7	7168M	1.9G	4.8G	29%	/usr
>
>This keeps my root filesystem safe.
>
>Also, it's not *easy* to extend your root filesystem, unless that
>ext2online feature is now working again/properly.  Even then, I can't
>remember if you could actually extend the root filesystem.
>
>But you could extend /var, /home, /usr, /tmp, etc. with much adoo.
>
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>

Thanks, I think I now understand why you would define Logical Volumes 
inside of your Volume Group. I never thought of it that way.

Mark.




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