[maemo-developers] Ovi Store disk space requirements miscalculations

[From: Daniil Ivanov]

Hi Martin!

  I will tell you a dirty secret:

 Nokia-N900:~# ls -l /usr/share/ | grep icons
 lrwxrwxrwx    1 root     root           20 Jul 13 14:27 icons ->
/opt/usr/share/icons

Thanks, Daniil.

On Wed, Jul 21, 2010 at 4:50 PM, Marius Vollmer
<marius.vollmer at nokia.com> wrote:
> ext Martin Storsjö <martin at martin.st> writes:
>
>> OPT folder value should be 80% of USR folder.
>
> Taken literally, this means that the OPT folder is actually supposed to
> be smaller than the USR folder... :-)
>
>> ACTUAL OUTCOME:
>> Opt folder value is not 80% of usr folder ,usr=84,opt=388k.
>
> This actually checks out for me:
>
>    388 / (388 + 84) = 0.82 > 0.8
>
> Maybe they want USR to be at most 20% of OPT?  That would be a bit strange, but
> would explain the verdict:
>
>    84 / 388 = 0.21 > 0.20
>
> If I remember right, Urho and me invented these numbers hand wavingly
> some time ago.  The idea back then was that if the OPT/USR ratio of a
> package is always larger than the OPT/USR ration of the actual
> partitions, then you can install as many packages as will fit into OPT
> without running out of USR.
>
> The partitions are 2G / 256M = 8.
>
> With the "du" numbers on ext3, your package has a ratio of
>
>     388 / 84 = 4.6 < 8
>
> which would indeed fail the requirements.
>
>
> With your numbers on ubifs, we have
>
>    368 / 20 = 18.4 > 8
>
> and you win by a huge margin.
>
> However, I agree that directories should not be counted at all.  Then
> you will probably win by a even larger margin.
>
>
> To summarize: I don't know what they have calculated, but I think they
> should calculate the OPT/USR ratio and require it to be larger than 8.
> Furthermore, only actual files should be counted.  Filesystem specific
> effects like directories should be exluded.  This is a heuristic anyway
> and making it simpler and easier to reproduce in different environments
> is therefore more important than accurate simulation of what would
> happen on the device.
>
> (If we want to simulate the device, we need to take UBIFS compression
> into account.)
>
>> Also, is there any idea in trying to discuss these issues in Ovi Publish
>> by commenting back? On Ovi/Symbian things, I've never ever seen a reviewer
>> actually take my comments in account, so I don't think anybody ever reads
>> the comments the submitter writes.
>
> I'll try to ping the right people here.
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