On Sun, May 29, 2016 at 8:27 PM, Chris Laprise <tas...@openmailbox.org>
wrote:

>
>
> On 05/29/2016 03:36 PM, Niels Kobschaetzki wrote:
>
>> Hi,
>>
>> is it just me or is in the documentation no explanation why one should
>> use over the other? I also couldn't really find anything in the
>> ML-archive.
>>
>> Why should I use btrfs or lvm with QubesOS? I have in my head somewhere
>> looming with real problems when there is not a lot of space available,
>> up to a system that is not bootable anymore. Do the tools provided by
>> Qubes use features of btrfs like snapshoting or what else it has up its
>> sleeves? What problems might arise when one uses btrfs? Is it really
>> stable enough nowadays?
>>
>> Niels
>>
>>
> Hi Niels,
>
> There is one case where I would use lvm over btrfs at this point: RAID
> configurations. I think they were still trying to get the bugs out of btrfs
> RAID as recently as last year.
>
> Otherwise, btrfs has been great with Qubes and I highly recommend it on a
> normal PC or laptop. Its been very stable for me and is now faster[1] and
> more versatile than other options. For instance, if I want to experiment
> with a number of different templates or appvms, Qubes will reflink the disk
> images instead of duplicating them. The reflinked copies occur instantly,
> and only use extra disk blocks when changes are made to the original or the
> copies. AFAIK, this capability is unique to btrfs and requires only a
> simple 'cp --reflink' which Qubes does automatically in the case of vm
> images.
>
> Btrfs also has differential send/receive backup and restore. Qubes backup
> doesn't take advantage of this yet, but its still something you can
> configure yourself.
>
> I haven't had any issues with disk space, though I generally keep more
> than 20GB free.
>
> Chris
>
> 1. https://www.diva-portal.org/smash/get/diva2:822493/FULLTEXT01.pdf
>
>
Very interesting post! Thanks Chris



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