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-   -   Do you allocate all disk space to logical volumes during installation? (http://www.linux-archive.org/red-hat-linux/164831-do-you-allocate-all-disk-space-logical-volumes-during-installation.html)

Joey Prestia 09-23-2008 02:09 PM

Do you allocate all disk space to logical volumes during installation?
 
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Erling Ringen Elvsrud wrote:
> Hello list,
>
> It is often hard to know how much space is needed for
> different mount points. Increasing the size of a filesystem is commonly
> described as a safer operation than reducing the size. Do you think
> saving space (not absolutely needed) for later is a good idea / common practice?
>
> It will probably cause a bit more filsystem resize (increase) operations but
> flexibility will be gained and symlinking / non standard placement
> of files may be avoided. A bit free space in the volume-group also gives space
> to lvm-snapshots if desired.
>
> Best regards,
>
> Erling Ringen Elvsrud
>

It is a very good practice to use LVM partitions for any that you
believe may need to grow later down the road. And we never partition the
whole disk. You may never need it. But if you do need that space later
it is invaluable to not have to shut down a machine and add a drive. I
have found It to be very handy to have the foresight to do this and used
it many times to be advantageous.

Best,

- --
Joey Prestia
L. G. Mirror Coordinator
http://linuxamd.com
Main Site http://linuxgazette.net


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mark 09-26-2008 03:13 PM

Do you allocate all disk space to logical volumes during installation?
 
Kenneth Holter wrote:
> On 9/23/08, mark <m.roth2006@rcn.com> wrote:
>> Joey Prestia wrote:
>>> Erling Ringen Elvsrud wrote:
>>>> Hello list,
>>>> It is often hard to know how much space is needed for
>>>> different mount points. Increasing the size of a filesystem is commonly
>>>> described as a safer operation than reducing the size. Do you think
>>>> saving space (not absolutely needed) for later is a good idea / common
>> practice?
>>> It is a very good practice to use LVM partitions for any that you
>>> believe may need to grow later down the road. And we never partition the
>>> whole disk. You may never need it. But if you do need that space later
>>> it is invaluable to not have to shut down a machine and add a drive. I
>>> have found It to be very handy to have the foresight to do this and used
>>> it many times to be advantageous.
>> Yup. As I said in my article "Upgrading Linux" in the July '07 SysAdmin
>> (now
>> ceased publication, dammit), I recommend LVM for /usr, /home, and *very*
>> much
>> for /opt (since so much software these days wants to be there). I would
>> *never*
>> use LVM for /boot or /
>>
>> Size: 100M or so for /boot; 4G-8G for /, 20G for /usr, 4G for /var, ditto
>> for
>> /tmp, and lots and lots for /opt and /home.
>>
> What's the reason for not using LVM for / and /boot?

You've got to have the lvm software loaded and running to see and mount it. For
booting, you *really* want KISS engineering - it's complicated enough without
throwing more risk into the mix.

mark

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