[nSLUG] Debian Wheezy partitioning...

Oliver Doepner odoepner at gmail.com
Sun Oct 19 17:25:47 ADT 2014


I will hang my head in shame once my laptop has actually been stolen. ;o)
I usually only use it at home and have never been a burglary victim in my
life (40+ years).

On Sun, Oct 19, 2014 at 3:37 PM, Rory <rory at unixism.org> wrote:

>  I know I'm late to this thread but I'll make another plug for LVM2. The
> learning curve isn't too steep and the advantages make it worthwhile. Plus,
> we're all supposed to like learning new Linux tech :)
>
> Even on a single disk system the flexibility has saved my butt a few
> times; well it has saved me significant time at least. On a multi-disk or
> raid system the advantages are multiplied. The full stack of RAID + LVM2
> might seem thick when you're setting it up but I'll never setup a file
> server any other way again.
>
> Also if you use the 'full drive encryption' with recent distro versions
> (which you always do on a laptop, yes? no? hang your head in shame! :) )
> then you're using LVM2 already.
>
> - R
>
>
> On 14-10-03 08:21 PM, Oliver Doepner wrote:
>
>  - Ok, interesting that modern LVM2 overhead is low. Anyhow, I don't like
> the added complexity (call me mentally lazy) if I don't absolutely need it.
>
>  - Corrupt sectors are probably a sign to replace the whole drive, and on
> a single drive system like laptop that means a reinstall anyway. I use a
> file server on the home network with automated backups to external disk
> (cron + rsync) to protect more precious data.
>
>  - Regarding different filesystems: I use XFS for everything. I haven't
> noticed any problems for big or small files.
>
> - I like Debian and almost never install other distros. If I do I use a
> Live CD first, but usually don't want it to access my /home. My experience
> with other distros: Not enough momentum and developer base to be as solid
> and well thought-out as Debian.
>
> On Fri, Oct 3, 2014 at 12:57 AM, Dave Flogeras <dflogeras2 at gmail.com>
> wrote:
>
>> On Thu, Oct 2, 2014 at 10:16 PM, Oliver Doepner <odoepner at gmail.com>
>> wrote:
>> > I heard LVM has significant overhead and is too complicated for my
>> taste.
>>
>> Perhaps in the early days of LVM.  I have not noticed any difference
>> on any of my machines that have migrated to modern LVM2.  As far as I
>> understand, even without it, the kernel does translations between
>> user-space, drivers, and the block devices (just like it does between
>> a process' virtual memory and the machine's physical memory).  LVM is
>> just incorporated into this "table lookup" at the kernel level.  The
>> CPU can manipulate a pointer far quicker than most storage systems can
>> read a block of disk.
>>
>> I know a lot of people have written about slow performance while using
>> snapshots.  I only let snapshots live for the duration of a backup,
>> and for my uses some degradation is acceptable to get a consistent
>> backup.  I think some people use snapshots as a way to trying out new
>> software installations with the option to revert.  Their performance
>> suffers until they merge or discard the snapshot.
>>
>>
>> > Can anyone think of drawbacks of this single partition approach?
>>
>> Disadvantages might include:
>> - A bad block causing filesystem corruption might lead to more damage
>> - You cannot take advantage of different filesystem strengths for
>> different types of data.  For instance, I use reiserfs for situations
>> when I know I will have many many <4k files (development trees,
>> Gentoo's package manager,  etc.).  I use ext4 when I will have lots of
>> big files, or do processing on batches of large files (benchmarking
>> showed a marked improvement).
>> - With separate /home and/or other user data partitions, you can
>> easily install a new distro without wiping the whole disk and copying
>> your data around (although doing this without working backups is a bad
>> idea in any situation).
>>
>> There are many good points on pro/con multiple partitions here, as
>> usual there is no right answer; it depends on your own situation:
>>
>> http://en.wikipedia.org/wiki/Disk_partitioning
>>
>>
>> Dave
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>
>
>
> --
> Oliver Doepner
> http://doepner.net/
>
>
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-- 
Oliver Doepner
http://doepner.net/
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