Agree with Chris.



Cheers,
Sylvia

On 20/12/2015, Chris Murphy <li...@colorremedies.com> wrote:
> On Sun, Dec 20, 2015 at 3:31 PM, Fernando Cassia <fcas...@gmail.com> wrote:
>>
>> On Sun, Dec 20, 2015 at 6:35 AM, Ian Malone <ibmal...@gmail.com> wrote:
>>>
>>> It's neither of these,
>>>
>>> https://fedoraproject.org/wiki/How_to_create_and_use_Live_USB#Data_persistence
>>>
>>> 'currently implemented (as a Device-mapper copy-on-write snapshot),
>>> every single change to it (writes AND deletes) subtracts from its free
>>> space, so it will eventually be "used up"'
>>
>>
>> It confirms what I said: it's broken.
>
> It's not broken. It's working as designed and documented. From
> livecd-iso-to-disk --help
>
> *Note well* that
>         deletion of any original files in the read-only root filesystem does
> not
>         recover any storage space on your LiveOS device.  Storage in the
>         persistent /LiveOS/overlay-<device_id> file is allocated as needed,
> but
>         the system will crash *without warning* and fail to boot once the
>         overlay has been totally consumed.  If significant changes or
> updates
>         to the root filesystem are to be made, carefully watch the fraction
> of
>         space allocated in the overlay by issuing the 'dmsetup status'
> command
>         at a command line of the running LiveOS image.  Some consumption of
> root
>         filesystem and overlay space can be avoided by specifying a
> persistent
>         home filesystem for user files, see --home-size-mb below.
>
>
>> How about changing the LiveCD creator
>> to allow for "persistent storage" partition that is formatted with F2FS?
>
> Someone needs to volunteer to do the research why that's a better
> option, and include some patches and kickstart scripts so that others
> can test. F2FS does not produce better results just by using it. It's
> highly customizeable/tunable, and it assumes you know things about
> your flash based drive that it can't know (because manufacturer's hide
> this information) so you can tune it. If you don't tune it, you can
> get worse results than just using ext4/XFS/Btrfs or heck even FAT or
> NTFS because the FTL in especially USB flash storage is very well
> tuned for FAT.
>
> --
> Chris Murphy
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